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README.org
Emacs setup for use with LaTeX, Org, and Python
- Copying
- Quick start
- Introduction
- Early Init File (info)
- Init File (info) header
- Install the selected packages (info)
- Emacs Tree-sitter
- Text faces or styles (info)
- Window management (info)
- Advising functions (info)
- Dired: directory editor as file manager (info)
- Minibuffer completion styles (info)
- Processes (info)
- Help (info)
- Key bindings (info)
- Using Emacs as a server (info)
- Completion
- Search and replace (info)
- Version Control (info)
- Reading
- Writing
- Writing LaTeX files
- Writing Markdown files
- Writing Org (info) files
- Org activation (info)
- Setup Org
- Citar: citing bibliography with Org Mode
- Compare bibtex and biblatex
- Engrave Faces
- Making Org hyperlink types (info)
- Extending org-mode to handle YouTube links
- Translate capital keywords (old) to lower case (new)
- Evaluate specific source blocks at load-time
- Easy LaTeX preamble editing
- Org-mode macro utilities
- File inclusion (info) and Noweb (info) trickery
- Advanced LaTeX export settings
- Org Syntax
- Grammar, spelling, and style tools
- Programming Tools
- Programming Modes
- Libraries
- Minor Modes (info)
- Display (info)
- Applications
- Init File (info) footer
- GNU Free Documentation License
- Local variables linking to Latexmk save-compile-display-loop
,#+latex_header: <<latex-header-1>>
,#+latex_header: <<latex-header-2>>
,#+latex_header: <<latex-header-3>>
,#+latex_header: <<latex-header-4>>
,#+latex_header: <<latex-header-5>>Copying
This README contains my Emacs setup for use with LaTeX, Org, and Python.
Copyright © 2021-2023 Gerard Vermeulen.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".
Quick start
This setup requires at least Emacs-29.0.60. Backup the user-emacs-directory
(defaults often to ~/.emacs.d on Linux, Unix, or Darwin) and execute the
commands in listing prepare the user-emacs-directory without ssh access or
in listing prepare the user-emacs-directory with ssh access. After invoking
Emacs interactively (in interactive mode, neither in batch mode, nor in server
mode), Emacs will ask you to install a selected set of packages. Quit Emacs and
invoke Emacs again.
cd ~
git clone https://forge.chapril.org/gav451/emacs.d.git .emacs.d
make --directory=.emacs.d init
emacs &cd ~
git clone ssh://gitea@forge.chapril.org:222/gav451/emacs.d.git .emacs.d
make --directory=.emacs.d init
emacs &Introduction
This Emacs setup aims to install automatically a minimal set of extension packages that allows to handle my reports and presentations. The file format of the reports is Org Mode plain text with Python source code blocks and the file format of the presentations is LaTeX.
This org file (more precisely the original org source file of this file) illustrates three methods in my work-flow:
- How to tangle (or export) source blocks from org files. This file contains
source blocks to produce the files
early-init.el,init.el,latexmkrc,org-store-link, andexample.pyby tangling. - How to export org files to other formats such as HTML, LaTeX, and PDF.
- How org hyperlinks (info) allow to link inside and outside Org Mode: hover over or click on the links to experiment.
The AUCTeX - Aalborg University Center TeX extension package provides a powerful Text-based User Interface (TUI) environment to edit the LaTeX presentations.
The Citar extension package provides quick filtering and selecting of bibliographic entries, and the option to run different commands on those selections. Citar exploits the extension packages Vertico, Embark, Marginalia, and Consult. The CiteProc extension package provides CSL: citation style language processing capabilities to Citar and Org Mode. A curated repository of CSL styles is the citation style language repository.
The PDF-Tools extension package renders PDF file with the possibility to
annotate the file or to click on anchors in the PDF file that link back to the
original LaTeX file of the document. An example of my work-flow are the steps
to convert this org file to PDF and to see the result with PDF-Tools in Emacs:
execute the commands pdf-tools-install, org-babel-tangle,
org-latex-export-latex-to-latex, and compile. This sets up an infinite
LaTeX compilation loop to update and redisplay the PDF file after excution of
the org-latex-export-latex-to-latex command in this buffer.
Here follows a list of interesting Emacs configurations:
- Musa Al-hassy's configuration is an impressive example of producing the Emacs initialization files and other files by tangling an org file. His methodology is impressive, as his Elisp Cheat Sheet and org-special-block-extra package show. To me, this is a configuration to admire, but his methodology is way over my head.
- Omar Antolin Camarena's configuration exploits built-in packages, Omar's own
small packages, and large external packages. Omar is the author of orderless
and embark. My use
setoptto set Emacs options instead of the customize interface comes from his idea of usingcustom-set-variablesalthough that is bad Emacs advice for new users. - Pierre Neirhardt's configuration implements lazy loading without help of external packages. I have stolen his approach of using lazy loading to silently ignore the setup stanzas of uninstalled extension packages.
- Sacha Chua's configuration is a practical example of producing the Emacs initialization files by tangling an org file. It gives me the impression that she is a very practical person trying to achieve her goals by the most efficient means.
- Steve Purcell's configuration is well organized and a showcase of readable code. Its commit and issue histories are also helpful: see for instance the discussion The order of company candidates is incorrect in Emacs lisp mode.
Here follows a list of links on how to use Emacs and Elisp:
- A guided tour of Emacs is a link to a video tour pointing how buffers (info), dired (info), documentation (info), elisp (info), elisp debugging (info), eshell (info), and keyboard macros (info) turn Emacs in an powerful coding and editing environment.
- Emergency Emacs is a link to a video on fundamental editing features and principles with focus on ediff (info), undo (info), moving point (info), erasing (info), and dynamic abbreviations (info).
- Endless Parentheses is a blog with many mindblowing code snippets.
- How to open a file in Emacs looks into elisp (info) and elisp debugging (info) and then compares Emacs, Vim, Neovim, and Visual Studio Code with respect to values and technology.
- Learning Emacs and Elisp is a link to a video tutorial with a transcript on the best approach to learn Emacs and Elisp.
- Mastering Emacs is a link to a blog with many interesting posts that promotes a book on how to become a proficient Emacs user.
Early Init File (info)
Try to load no-littering as early as possible, since it helps to keep
~/.emacs.d clean.
;;; early-init.el --- user early-init file -*- lexical-binding: t -*-
;;; Commentary:
;;; Code:
(setq load-prefer-newer t)
(require 'no-littering nil 'noerror)
(provide 'early-init)
;; Emacs looks for "Local variables:" after the last "?\n?\f".
;; Local Variables:
;; indent-tabs-mode: nil
;; End:
;;; earl-init.el ends hereIn order to get help in understanding the code block above in a buffer showing the original Org source file, type
(eval
after moving point (or cursor) to one of the items of the list:- src_emacs-lisp{(describe-variable #'load-prefer-newer t)}
- src_emacs-lisp{(apropos-library "no-littering")}
- src_emacs-lisp{(find-function #'hack-local-variables)}
to execute the code between the curly braces for access to help. This shows that Emacs is a self-documenting editor.
Init File (info) header
The user-init-file header requires cl-lib and sets Emacs options. It
consists of two parts in listing lst:1st-setopt-call, and lst:2nd-setopt-call in
order to limit the length of the listings for exporting to LaTeX.
The quoting (info) and the backquote (info) pages explain how to understand the
' (quote), ` (backquote), , (substitute) and @, (splice) in in listing
lst:1st-setopt-call and lst:2nd-setopt-call. A tutorial of how to use those
reader macros is the didactic emacs-lisp macro example.
The init file (info) does not load the custom-file in spite of the
recommendation of saving customizations (info).
;;; init.el --- user init file -*- lexical-binding: t -*-
;;; Commentary:
;;; Code:
(require 'cl-lib)
(when (version< emacs-version "29.0.60")
(error "This `init.el' requires at least Emacs-29.0.60"))
(setopt
after-save-hook #'executable-make-buffer-file-executable-if-script-p
column-number-mode t
cursor-type 'box
custom-file (locate-user-emacs-file "custom.el")
epg-pinentry-mode 'loopback
global-hl-line-mode t
global-hl-line-sticky-flag t
history-delete-duplicates t
history-length 500
indent-tabs-mode nil
inhibit-startup-buffer-menu t
inhibit-startup-screen t
initial-buffer-choice t
initial-scratch-message ""
insert-directory-program (or (executable-find "gls")
(executable-find "ls"))
kill-ring-max 300
mode-line-compact 'long
next-error-message-highlight t
recentf-mode t
save-place-mode t
scroll-bar-mode nil
tab-always-indent 'complete
tab-width 8
tool-bar-mode nil
url-cookie-trusted-urls nil
url-cookie-untrusted-urls '(".*")
use-dialog-box nil
use-short-answers t
view-read-only t)
(when (eq system-type 'darwin)
(setopt ns-alternate-modifier nil
ns-command-modifier 'meta
ns-right-command-modifier 'super))
(when (eq window-system 'ns)
(add-to-list 'initial-frame-alist '(height . 51))
(add-to-list 'initial-frame-alist '(width . 180)))(setopt
;; See https://github.com/melpa/melpa#mirrors for official Melpa mirrors.
;; ("melpa" . "https://www.mirrorservice.org/sites/melpa.org/packages/")
package-archives '(("gnu" . "https://elpa.gnu.org/packages/")
("gnu-devel" . "https://elpa.gnu.org/devel/")
("melpa" . "https://melpa.org/packages/")
("nongnu" . "https://elpa.nongnu.org/nongnu/"))
;; Pin packages to GNU ELPA for info or stability.
package-pinned-packages '((auctex . "gnu")
(compat . "gnu")
(consult . "gnu-devel")
(embark . "gnu-devel")
(embark-consult . "gnu-devel")
(engrave-faces . "gnu-devel")
(hyperbole . "gnu-devel")
(marginalia . "gnu-devel")
(org . "gnu-devel")
(queue . "gnu")
(rainbow-mode . "gnu")
(spinner . "gnu")
(xr . "gnu")
(vertico . "gnu-devel"))
package-selected-packages '(async ; asynchroneous processing
debbugs ; access the GNU bug tracker
no-littering ; keep `user-emacs-directory' clean
org ; thought organizer
wgrep)) ; open a writable grep bufferInstall the selected packages (info)
Emacs installs packages from archives on the internet. This setup uses three archives:
- The GNU Emacs Lisp Package Archive
- The NonGNU Emacs Lisp Package Archive.
- The Milkypostman's Emacs Lisp Package Archive (MELPA) with its official mirror in case is Melpa.org down? tells MELPA is down for everyone.
The code in listing lst:install-selected-packages assumes that the package system is in a virgin state if the package no-littering is not present:
- It installs and loads no-littering after ensuring refreshing of the contents of available packages.
- It installs Org (GNU-devel ELPA archive) early to shadow the built-in package while preventing collisions between the snapshot and built-in packages.
- It calls src_emacs-lisp{(package-install-selected-packages)} to check the installation status of all packages in src_emacs-lisp{package-selected-packages} and to install the missing packages after the user has agreed to its prompt.
- It defines a function to ensure the installation of packages in other source
blocks. This allows skipping installation in sections with a
:noexport:tag by disallowing tangling.
In case of normal Emacs usage, src_emacs-lisp{(package-list-packages)} refreshes the contents of packages and allows to update packages to the latest version.
(unless noninteractive
(unless (require 'no-littering nil 'noerror)
(unless (bound-and-true-p package-archive-contents)
(package-refresh-contents))
;; Install and require `no-littering'.
(package-install 'no-littering)
(require 'no-littering)
;; https://emacs.stackexchange.com/a/45939 answers
;; "How to shadow automatically a built-in package by installing it?"
(defun shadow-builtin-by-install (pkg)
(when-let ((desc (cadr (assq pkg package-archive-contents))))
(package-install desc 'dont-select)))
;; Shadow built-in `org' by installing `org'.
(shadow-builtin-by-install 'org)
;; Install the selected packages.
(package-install-selected-packages)))
(defun ensure-package-selection (package)
"Ensure selection of PACKAGE."
(when (and (package-installed-p package)
(bound-and-true-p package-selected-packages))
(cl-pushnew package package-selected-packages)))
(defun ensure-package-installation (&rest packages)
"Ensure installation of all packages in PACKAGES."
(let ((ok t))
(dolist (package packages)
(unless (package-installed-p package)
(package-install package))
(unless (ensure-package-selection package)
(setq ok nil)))
ok))Emacs Tree-sitter
(when (require 'treesit nil 'noerror)
(setopt
treesit-language-source-alist
'((bash "https://github.com/tree-sitter/tree-sitter-bash" "master" "src")
(c "https://github.com/tree-sitter/tree-sitter-c" "master" "src")
(cmake "https://github.com/uyha/tree-sitter-cmake" "master" "src")
(cpp "https://github.com/tree-sitter/tree-sitter-cpp" "master" "src")
(css "https://github.com/tree-sitter/tree-sitter-css" "master" "src")
(glsl "https://github.com/theHamsta/tree-sitter-glsl" "master" "src")
(go "https://github.com/tree-sitter/tree-sitter-go" "master" "src")
(html "https://github.com/tree-sitter/tree-sitter-html" "master" "src")
(java "https://github.com/tree-sitter/tree-sitter-java" "master" "src")
(javascript "https://github.com/tree-sitter/tree-sitter-javascript"
"master" "src")
(json "https://github.com/tree-sitter/tree-sitter-json" "master" "src")
(julia "https://github.com/tree-sitter/tree-sitter-julia" "master" "src")
(make "https://github.com/alemuller/tree-sitter-make" "main" "src")
(perl "https://github.com/ganezdragon/tree-sitter-perl" "master" "src")
(python "https://github.com/tree-sitter/tree-sitter-python" "master" "src")
(ruby "https://github.com/tree-sitter/tree-sitter-ruby" "master" "src")
(rust "https://github.com/tree-sitter/tree-sitter-rust" "master" "src")
(scala "https://github.com/tree-sitter/tree-sitter-scala" "master" "src")
(sql "https://github.com/m-novikov/tree-sitter-sql" "main" "src")
(swift "https://github.com/tree-sitter/tree-sitter-swift" "master" "src")
(toml "https://github.com/tree-sitter/tree-sitter-toml" "master" "src")
(tsx "https://github.com/tree-sitter/tree-sitter-typescript"
"master" "tsx/src")
(typescript "https://github.com/tree-sitter/tree-sitter-typescript"
"master" "typescript/src")
(yaml "https://github.com/ikatyang/tree-sitter-yaml" "master" "src")))
(add-to-list 'auto-mode-alist
`(,(rx ".py" (opt (any "iw")) eos) . python-ts-mode)))Text faces or styles (info)
This setup does not use custom themes (info) to avoid endless tweaking, but it does a minimal setup of fonts and faces. See the note on mixed font heights in Emacs for how to setup fonts properly. It boils down to two rules:
- The height of the default face must be an integer number to make the height a physical quantity.
- The heights of all other faces must be real numbers to scale those heights with respect to the height of the face (those heights default to 1.0 for no scaling).
The code in listing lst:configure-face-attributes source implements those rules. Listing lst:set-default-face-height shows that font scaling is easy in case of proper initialization of all face heigths. Listing lst:fix-gtk-color-for-invert-default-face, lst:shadow-org-font-lock-faces, and lst:shadow-org-font-lock-faces show a few tweaks to improve visibility without theming:
- Fixing the
gtkbackground color of the already loadedregionface. - Toggling between a dark and light background by means of src_emacs-lisp{(invert-default-face)}.
- Shadowing the definition of faces before loading. The last item in the page on fontifying Org mode source code blocks describes this method.
(with-eval-after-load 'emacs
;; Set face attributes.
(cond
((eq system-type 'darwin)
(set-face-attribute 'default nil :family "Hack" :height 120)
(set-face-attribute 'fixed-pitch nil :family "Hack")
(set-face-attribute 'variable-pitch nil :family "FiraGo"))
((eq system-type 'gnu/linux)
(set-face-attribute 'default nil :family "Hack" :height 110)
(set-face-attribute 'fixed-pitch nil :family "Hack")
(set-face-attribute 'variable-pitch nil :family "FiraGo"))
(t
(set-face-attribute 'default nil :family "Hack" :height 110)
(set-face-attribute 'fixed-pitch nil :family "Hack")
(set-face-attribute 'variable-pitch nil :family "DejaVu Sans"))))(with-eval-after-load 'emacs
(defun set-default-face-height ()
"Set the default face height in all current and future frames.
Scale all other faces with a height that is a real number."
(interactive)
(let* ((prompt (format "face heigth (%s): "
(face-attribute 'default :height)))
(choices (mapcar #'number-to-string
(number-sequence 50 200 10)))
(height (string-to-number
(completing-read prompt choices nil 'require-match))))
(message "Setting the height of the default face to %s" height)
(set-face-attribute 'default nil :height height))));; Use proportional font faces in current buffer
(defun set-buffer-variable-pitch-face ()
"Set a variable width (proportional) font in current buffer."
(interactive)
(setq buffer-face-mode-face 'variable-pitch)
(buffer-face-mode))
;; Use monospaced font faces in current buffer
(defun set-buffer-fixed-pitch-face ()
"Set a fixed width (monospace) font in current buffer."
(interactive)
(setq buffer-face-mode-face 'fixed-pitch)
(buffer-face-mode))
(add-hook 'magit-mode-hook #'set-buffer-fixed-pitch-face)
(add-hook 'prog-mode-hook #'set-buffer-fixed-pitch-face)(with-eval-after-load 'emacs
(defun fix-gtk-region-face-background-color ()
(when (featurep 'gtk)
(set-face-attribute
'region nil
:background (cdr (assoc (face-attribute 'default :background)
'(("white" . "LightGoldenrod2")
("black" . "blue3")))))))
(defun invert-default-face ()
"Invert the default face."
(interactive)
(invert-face 'default)
(fix-gtk-region-face-background-color))
(fix-gtk-region-face-background-color))(with-eval-after-load 'emacs
;; Shadow two definitions in org-faces.el:
(defface org-block
;; https://emacs.stackexchange.com/a/9604 answers:
;; How to override a defined face for light and dark backgrounds?
`((((background dark))
:inherit (fixed-pitch)
,@(and (>= emacs-major-version 27) '(:extend t))
:background "#444444")
(t
:inherit (fixed-pitch)
,@(and (>= emacs-major-version 27) '(:extend t))
:background "#FFFFD0"))
"My face used for text inside various blocks.
It is always used for source blocks. You can refine what face
should be used depending on the source block language by setting,
`org-src-block-faces', which takes precedence.
When `org-fontify-quote-and-verse-blocks' is not nil, text inside
verse and quote blocks are fontified using the `org-verse' and
`org-quote' faces, which inherit from `org-block'.")
(defface org-table
;; https://emacs.stackexchange.com/a/9604 answers:
;; How to override a defined face for light and dark backgrounds?
`((((background dark))
:inherit (fixed-pitch)
,@(and (>= emacs-major-version 27) '(:extend t))
:background "#444444")
(t
:inherit (fixed-pitch)
,@(and (>= emacs-major-version 27) '(:extend t))
:background "#FFFFD0"))
"My face for tables."))(with-eval-after-load 'emacs
;; Shadow one definition in sh-script.el:
(defface sh-heredoc
'((((class color) (background dark))
(:foreground "yellow"))
(((class color) (background light))
(:foreground "magenta"))
(t
(:weight bold)))
"My face to show a here-document."))Window management (info)
Mickey Peterson's post Demystifying Emacs's Window Manager invites to improve window placement. Listing lst:1st-window-management, lst:2nd-window-management and lst:3rd-window-management implement a selection of his recommendations.
(with-eval-after-load 'emacs
;; https://www.masteringemacs.org/article/demystifying-emacs-window-manager
(defun split-root-below (arg)
"Split window below from the root or from the parent with ARG."
(interactive "P")
(split-window (if arg
(window-parent (selected-window))
(frame-root-window))
nil 'below nil))
(defun split-root-right (arg)
"Split window right from the root or from the parent with ARG."
(interactive "P")
(split-window (if arg
(window-parent (selected-window))
(frame-root-window))
nil 'right nil))
(defun toggle-window-dedication ()
"Toggles window dedication in the selected window."
(interactive)
(set-window-dedicated-p
(selected-window) (not (window-dedicated-p (selected-window)))))
(defun make-display-buffer-matcher-function (major-modes)
"Return a lambda function to match a list of MAJOR-MODES."
(lambda (buffer-name action)
(with-current-buffer buffer-name (apply #'derived-mode-p major-modes))))
(global-set-key (kbd "M-o") #'other-window))(with-eval-after-load 'emacs
(winner-mode +1))(with-eval-after-load 'emacs
;; https://www.masteringemacs.org/article/demystifying-emacs-window-manager
(when (version< "29.0.0" emacs-version)
(setopt switch-to-buffer-in-dedicated-window 'pop
switch-to-buffer-obey-display-actions t))
(add-to-list 'display-buffer-alist
`(,(rx (or "*Apropos*"
"*Help*"
"*info"))
(display-buffer-reuse-window display-buffer-pop-up-window)
(inhibit-same-window . nil)))
(add-to-list 'display-buffer-alist
`(,(rx (or "*Occur*"
"*grep*"
"*xref*"))
display-buffer-reuse-window
(inhibit-same-window . nil)))
(add-to-list 'display-buffer-alist
'("\\*compilation\\*"
display-buffer-no-window
(allow-no-window . t)))
(add-to-list 'display-buffer-alist
'("^\\*Dictionary\\*" display-buffer-in-side-window
(side . left)
(window-width . 70))))Advising functions (info)
(with-eval-after-load 'emacs
(defun advice-toggle (symbol where function &optional props)
"Toggle between states after `advice-remove' and `advice-add'."
(let ((how "%s `%s' advice `%s' %s `%s'"))
(if (advice-member-p function symbol)
(progn
(message how "Removal of" where function "from" symbol)
(advice-remove symbol function))
(message how "Addition of" where function "to" symbol)
(advice-add symbol where function props)))))(with-eval-after-load 'emacs
(defun toggle-eww-display-pdf-around ()
"Toggle `eww-display-advice' advice."
(interactive)
(advice-toggle 'eww-display-pdf :around #'eww-display-pdf-as-binary))
(defun toggle-ilog-timer-function-after ()
"Toggle `ilog-timer-function' advice."
(interactive)
(advice-toggle 'ilog-timer-function :after #'ilog-ensure-ilog-buffer-window))
(defun toggle-keycast-log-update-buffer-override ()
"Toggle `keycast-log-update-buffer' advice."
(interactive)
(advice-toggle 'keycast-log-update-buffer
:override #'keycast-log-update-buffer-plain))
(defun toggle-org-babel-python-format-session-value-override ()
"Toggle `org-babel-python-format-session-value' advice."
(interactive)
(advice-toggle 'org-babel-python-format-session-value
:override #'org-babel-python-format-session-value-override)))Dired: directory editor as file manager (info)
Dired (info) and the ranger file manager offer similar capabilities for copying, deleting, opening, renaming, and viewing files and directories, but the integration of dired (info) in Emacs is obviously much better than the integration of ranger in Emacs.
For instance, this setup allows to insert an org-mode link to an poorly
identified file containing a specific image into an org-mode buffer by means
of the facilities of dired (info) as follows:
- Type
(eval
to open the directory containing the pooly identified file with the specific image in adired-modebuffer. - Start searching for the specific image by navigating to the name of any image file.
- Type
(eval
to switch to view the file in animage-modebuffer. -
In the
image-modebuffer, continue searching for the specific image by typing:(eval
to view the next image in thedired-modebuffer,(eval
to view the previous image in thedired-modebuffer, and(eval
to quit theimage-modebuffer and to go back to thedired-modebuffer.
- After finding the specific image, use
(eval
in theimage-modebuffer or thedired-modebuffer to store theorg-link. - Switch to the
org-modebuffer and use(eval
to insert theorg-linkinto the buffer.
Listing lst:set-dired-options makes the directory editor sort entries alphabetically after grouping the directories before grouping the files by extension.
(with-eval-after-load 'dired
(setopt dired-dwim-target t
;; | switch | action |
;; |--------+----------------------------------------|
;; | -a | also list hidden entries |
;; | -l | use a long listing format |
;; | -X | sort alphabetically by entry extension |
;; | -G | skip long listing format group names |
;; | -1 | list one entry per line |
dired-listing-switches "-alGX1 --group-directories-first"
dired-recursive-copies 'always
dired-recursive-deletes 'always))
(with-eval-after-load 'files
;; Ensure the use of `GNU-ls' from `coreutils' on darwin.
(setopt insert-directory-program (or (executable-find "gls")
(executable-find "ls"))))
(with-eval-after-load 'wdired
(setopt wdired-allow-to-change-permissions t))
Listing lst:extra-dired-key-bindings adds new key bindings to dired-mode-map to:
- Open files with the Emacs Web Wowser inside Emacs.
- Let rsync copy marked files outside Emacs to a local or remote directory.
The link asynchoronous execution library for Emacs Dired is the original source for the idea of using rsync and the blog articles using rsync in dired and asynchronous rsync with Emacs, dired and tramp are vivid recommendations written by experienced Emacs users.
(with-eval-after-load 'dired
(defun dired-eww-open-file ()
"In Dired, open the regular file named on this line with eww"
(interactive)
(let ((file (dired-get-file-for-visit)))
(if (file-regular-p file)
(eww-open-file file)
(error "Eww rejects `%s', since it is not a regular file" file))))
;; https://truongtx.me/tmtxt-dired-async.html
(defun dired-rsync (target)
"Copy marked files with `rsync' to TARGET directory."
(interactive
(list (expand-file-name
(read-file-name "Rsync to:" (dired-dwim-target-directory)))))
;; Store all marked files into the `files' list and intialize
;; the `rsync-command'.
(let ((files (dired-get-marked-files nil current-prefix-arg))
(rsync-command "rsync -av --progress "))
;; Add all marked files as arguments to the `rsync-command'.
(dolist (file files)
(setq rsync-command
(concat rsync-command
(if (string-match "^/ssh:\\(.*\\)$" file)
(format " -e ssh %s" (match-string 1 file))
(shell-quote-argument file)) " ")))
;; Append the destination directory to the `rsync-command'.
(setq rsync-command
(concat rsync-command
(if (string-match "^/ssh:\\(.*\\)$" target)
(format " -e ssh %s" (match-string 1 target))
(shell-quote-argument target))))
;; Run the async shell command.
(async-shell-command rsync-command)
;; Finally, switch to that window.
(other-window 1)))
(define-key dired-mode-map (kbd "E") #'dired-eww-open-file)
(define-key dired-mode-map (kbd "Y") #'dired-rsync))Minibuffer completion styles (info)
Listing set minibuffer options implements ideas of the post Understanding minibuffer completion.
(when (require 'minibuffer nil 'noerror)
;; https://www.masteringemacs.org/article/understanding-minibuffer-completion
(setopt
completion-category-overrides '((file (styles basic substring)))
completion-ignore-case nil
completion-styles '(basic flex partial-completion substring)))Processes (info)
Listing lst:process-utilities defines a function to run a (command-line) program
with arguments and to obtain a list with its numeric exit status as well as its
output to stdout.
;; https://gitlab.com/howardabrams/spacemacs.d/blob/master/layers/ha-org/funcs.el#L418
(defun shell-command-with-exit-code (program &rest args)
"Run PROGRAM with ARGS and return exit-code and output in a list."
(with-temp-buffer
(list (apply 'call-process program nil (current-buffer) nil args)
(buffer-string))))Help (info)
Table tab:help-key-bindings lists a number of key bindings to start playing with the help facilities of Emacs. Try or
(eval
.| command | key map | keys |
| Info-goto-emacs-command-node | help-map | (eval |
| describe-function | help-map | (eval |
| describe-key | help-map | (eval |
| describe-symbol | help-map | (eval |
| describe-variable | help-map | (eval |
| info | help-map | (eval |
(defun org-key-binding-macro (cmd)
(let* ((sym (intern-soft cmd))
(keys (and (commandp sym) (where-is-internal sym nil 'first-only)))
(prefix (seq-take keys (1- (length keys))))
(keymap (key-binding prefix 'accept-default)))
(format "%s %s %s {{{kbd(%s)}}}"
cmd keymap (help--binding-locus keys nil) (key-description keys))))
(org-key-binding-macro 'consult-buffer)Shortdoc-display-group (info)
Listing lst:configure-shortdoc binds
(eval
toshort-doc-display-group and defines a short documentation group for functions
defined in this Org file.
(when (fboundp 'shortdoc-display-group)
(define-key help-map (kbd "y") #'shortdoc-display-group)
(with-eval-after-load 'shortdoc
;; Ensure defining the functions before documenting them.
(define-short-documentation-group init
"Advice"
(advice-toggle :no-manual t)
(toggle-eww-display-pdf-around :no-manual t)
(toggle-ilog-timer-function-after :no-manual t)
(toggle-keycast-log-update-buffer-override :no-manual t)
(toggle-org-babel-python-format-session-value-override :no-manual t)
"Face"
(invert-default-face :no-manual t)
(set-default-face-height :no-manual t)
"Interaction"
(enable-this-command :no-manual t)
(narrow-or-widen-dwim :no-manual t)
(org-narrow-to-table :no-manual t)
"LaTeX"
(biber-delete-cache :no-manual t)
(update-lualatex-opentype-font-name-database :no-manual t)
"Org"
(by-backend :no-manual t)
(by-backend-kbd-org-macro :no-manual t)
(org-active-current-time-stamp :nomanual t)
(org-babel-execute:latex-extra-header :no-manual t)
(org-babel-execute:latex-header :no-manual t)
(org-electric-dollar :no-manual t)
(org-eval-emacs-lisp-setup-blocks :no-manual t)
(org-eval-python-setup-blocks :no-manual t)
(org-eval-infixed-blocks :no-manual t)
(org-latex-engraved-source-block-filter :no-manual t)
(org-inactive-current-time-stamp :nomanual t)
(org-syntax-convert-keyword-case-to-lower :no-manual t)
(smart-latex-engrave-org-source-blocks :no-manual t)
(zero-all-org-src-blocks-indentation :no-manual t)
"Python"
(choose-common-python-interpreter :no-manual t)
(choose-common-python-linter :no-manual t))))Info (info)
Listing lst:configure-info adds the required paths to the places where info
looks for files.
(with-eval-after-load 'info
;; Make Emacs find ALL "*.info" files in `package-user-dir' on Gentoo Linux.
(when (eq system-type 'gnu/linux)
(dolist (path
(nreverse
(mapcar
(lambda (name)
(expand-file-name (file-name-directory name)))
(directory-files-recursively package-user-dir "\\.info\\'"))))
(add-to-list 'Info-directory-list path nil #'file-equal-p)))
;; Make Emacs find my "python.info" file.
(add-to-list 'Info-directory-list
(expand-file-name "~/.local/share/info")))Key bindings (info)
| command | key map | keys |
| undo | global-map | (eval |
| backward-kill-word | global-map | (eval |
| backward-char | global-map | (eval |
| forward-char | global-map | (eval |
| backward-word | global-map | (eval |
| forward-word | global-map | (eval |
| backward-sentence | global-map | (eval |
| forward-sentence | global-map | (eval |
Disabling Commands (info)
Execute src_emacs-lisp{(find-library "novice")} to see how Emacs prevents new users from shooting themselves in the feet. Listing lst:configure-disabled-command-function enables disabled commands on the fly.
(with-eval-after-load 'emacs
(setq disabled-command-function
(defun enable-this-command (&rest _args)
"Called when a disabled command is executed.
Enable it and re-execute it."
(put this-command 'disabled nil)
(message "You typed %s. %s was disabled until now."
(key-description (this-command-keys)) this-command)
(sit-for 0)
(call-interactively this-command))))Interaction-log
(when (and (ensure-package-installation 'interaction-log)
(require 'interaction-log nil 'noerror))
;; https://www.skybert.net/emacs/show-shortcuts-when-giving-presentations/
(defun ilog-ensure-ilog-buffer-window ()
"Ensure the visibility of the `ilog' buffer, when it exists."
(when (and (get-buffer ilog-buffer-name)
(not (get-buffer-window ilog-buffer-name)))
(display-buffer (get-buffer ilog-buffer-name))))
(define-key help-map (kbd "C-l") #'interaction-log-mode)
(advice-add 'ilog-timer-function :after #'ilog-ensure-ilog-buffer-window))Using Emacs as a server (info)
Emacs can act as a server that listens to a socket to share its state (for
instance buffers and command history) with other programs by means of a shell
command emacsclient. Section #sec:latexmk-save-compile-display-loop and
#sec:qutebrowser-userscript show how to use emacsclient to:
- Install an asynchronous (or background) loop of saving a LaTeX file, compiling it, and redisplaying the output in Emacs.
- Make qutebrowser send html links with document titles to Emacs.
The code in listing lst:start-emacs-server starts the Emacs server.
(when window-system
(unless (or noninteractive (daemonp))
(add-hook 'after-init-hook #'server-start)))Latexmk save-compile-display loop
The latexmk resource file in the next source code block shows how to use
emacsclient to (re)display the PDF file in Emacs after each successful
(re)compilation on condition that the local compile-command variable is
correct. The local compile-command variable in the local variables section
(only visible in org files, but not in html and pdf files) shows how to
make use of the latexmkrc file.
# pdf creator
$pdf_mode = 4; # 4 means lualatex
# pdf previewer and update pdf previewer
$pdf_previewer = "emacsclient -e '(find-file-other-window %S)'";
$pdf_update_method = 4; # 4 runs $pdf_update_command to force the update
$pdf_update_command = "emacsclient -e '(with-current-buffer (find-buffer-visiting %S) (pdf-view-revert-buffer nil t))'";
# see for instance glossary.latexmkrc
add_cus_dep( 'acn', 'acr', 0, 'makeglossaries' );
add_cus_dep( 'glo', 'gls', 0, 'makeglossaries' );
# use ".=" to append to $clean_ext
$clean_ext .= " acr acn alg bbl dvi glo gls glg ist lol lst";
$clean_ext .= " nav run.xml snm synctex.gz";
sub makeglossaries {
my ($name, $path) = fileparse( $$Psource );
return system "makeglossaries -d '$path' '$name'";
}
# Emacs looks for "Local variables:" after the last "newline-formfeed".
# Local Variables:
# mode: perl
# End:Qutebrowser userscript
The next block contains an userscript that sends a store-link org-protocol
message with the url and the title from qutebrowser to emacsclient. The
function urlencode translates the url and the title for the message. The
Python urllib examples show how to use urlencode. The final execvp call
deals with a qutebrowser userscript requirement: the emacsclient process must
get the PID of the userscript that must kill itself after the take-over.
Termination of the emacsclient process hands control back to qutebrowser.
On a POSIX system, you can run the userscript from qutebrowser or from a terminal to see whether it works. In case you try to run it from Emacs, Emacs may hang or die.
#!/usr/bin/env python
from urllib.parse import urlencode
from os import environ, execvp
url = environ.get("QUTE_URL", "https://orgmode.org")
title = environ.get("QUTE_TITLE", "Org Mode")
parameters = urlencode({"url": url, "title": title})
print(payload := f"org-protocol://store-link?{parameters}")
execvp("emacsclient", ("-n", payload))TODO Look into: org-protocol handling with other browser on Darwin
Completion
Vertico (info) provides a performant and minimalistic vertical completion UI based on the default completion system and behaves therefore correctly under all circumstances. Using Vertico, Marginalia, Consult, and Embark links to a video demonstration. Vertico integrates well with fully supported complementary packages to enrich the completion UI:
- Embark (info) for minibuffer actions with context menus,
- Marginalia (info) for rich annotations in the minibuffer, and
- Consult (info) for useful search and navigation commands,
where the order is that of enhancing citar's experience and the configuration steps below.
Finally, company: a modular complete-anything framework for Emacs provides completion in any buffer.
Company (info)
Company (info) is a modular completion framework and the the snippet below ensures its installation.
(ensure-package-installation 'company)Vertico (info)
Listing lst:enable-vertico-mode configures and enables savehist-mode and
enables vertico-mode. The documentation src_emacs-lisp{(describe-function
'savehist-mode)} why it is best to turn on savehist-mode in the Emacs init
file.
(when (require 'savehist nil 'noerror)
(setopt savehist-additional-variables '(eww-history
kill-ring
regexp-search-string
search-ring
search-string))
(savehist-mode +1))
(when (and (ensure-package-installation 'vertico)
(fboundp 'vertico-mode))
(vertico-mode +1))
(with-eval-after-load 'vertico
(define-key vertico-map (kbd "RET") #'vertico-directory-enter)
(define-key vertico-map (kbd "DEL") #'vertico-directory-delete-char)
(define-key vertico-map (kbd "M-DEL") #'vertico-directory-delete-word))| command | remap | keys |
| vertico-directory-delete-char | (eval |
|
| vertico-directory-delete-word | (eval |
|
| vertico-directory-enter | (eval |
|
| vertico-exit | exit-minibuffer | (eval |
| vertico-exit-input | (eval |
|
| vertico-first | beginning-of-buffer | (eval |
| vertico-first | minibuffer-beginning-of-buffer | (eval |
| vertico-insert | (eval |
|
| vertico-last | end-of-buffer | (eval |
| vertico-next-group | forward-paragraph | (eval |
| vertico-next | next-line-or-history-element | (eval |
| vertico-next | next-line | (eval |
| vertico-previous-group | backward-paragraph | (eval |
| vertico-previous | previous-line-or-history-element | (eval |
| vertico-previous | previous-line | (eval |
| vertico-save | kill-ring-save | (eval |
| vertico-scroll-down | scroll-down-command | (eval |
| vertico-scroll-up | scroll-up-command | (eval |
Embark (info)
Listing bind embark commands binds embark commands to the global key map:
embark-actprompts the user for an action and performs it.-
Except for highlighting of email and web URLs,
embark-dwimenglobes the functionality of src_emacs-lisp{(find-library "goto-addr")} that activates mail and web URLs to turn them into clickable buttons. Sinceembark-dwimacts on a superset of target types, it rendersgoto-addrsuperfluous. See: embark-bindingsallows to explore all current command key bindings in the minibuffer.- The initialization src_emacs-lisples minibuffer help after a prefix key
(for instance
or
(eval
shows.
(when (ensure-package-installation 'embark 'embark-consult)
(when (fboundp 'embark-act)
(global-set-key (kbd "C-,") #'embark-act))
(when (fboundp 'embark-dwim)
(global-set-key (kbd "C-:") #'embark-dwim))
(when (fboundp 'embark-bindings)
(global-set-key (kbd "C-h B") #'embark-bindings))
(when (fboundp 'embark-prefix-help-command)
(setq prefix-help-command #'embark-prefix-help-command)))Marginalia (info)
Listing lst:enable-marginalia-mode enables marginalia-mode.
(when (and (ensure-package-installation 'marginalia)
(fboundp 'marginalia-mode))
(marginalia-mode +1))Consult (info)
Consult (info) provides practical commands based on the Emacs minibuffer
completion function completing-read. Listing bind consult commands binds
consult commands to different key maps.
| command | key map | keys |
| consult-bookmark | ctl-x-r-keymap | (eval |
| consult-buffer-other-frame | ctl-x-5-keymap | (eval |
| consult-buffer-other-window | ctl-x-4-keymap | (eval |
| consult-buffer | ctl-x-keymap | (eval |
| consult-compile-error | goto-map | (eval |
| consult-complex-command | ctl-x-keymap | (eval |
| consult-find | search-map | (eval |
| consult-focus-lines | search-map | (eval |
| consult-git-grep | search-map | (eval |
| consult-global-mark | goto-map | (eval |
| consult-goto-line | goto-map | (eval |
| consult-goto-line | goto-map | (eval |
| consult-history | global-map | (eval |
| consult-imenu | goto-map | (eval |
| consult-keep-lines | search-map | (eval |
| consult-line | search-map | (eval |
| consult-mark | goto-map | (eval |
| consult-mode-command | global-map | (eval |
| consult-multi-occur | search-map | (eval |
| consult-outline | goto-map | (eval |
| consult-register | ctl-x-r-keymap | (eval |
| consult-yank-pop | global-map | (eval |
| deadgrep | search-map | (eval |
| elfeed | global-map | (eval |
| embark-act | global-map | (eval |
| embark-bindings | global-map | (eval |
| embark-dwim | global-map | (eval |
| iedit-mode | global-map | (eval |
| minibuffer-complete-history | minibuffer-local-map | (eval |
| narrow-or-widen-dwim | ctl-x-keymap | (eval |
| org-agenda | global-map | (eval |
| org-capture | global-map | (eval |
| org-cite | org-mode-map | (eval |
| org-insert-link-global | global-map | (eval |
| org-narrow-to-table | ctl-x-keymap | (eval |
| org-store-link | global-map | (eval |
(when (ensure-package-installation 'consult)
;; C-c bindings (current-global-map)
(global-set-key (kbd "C-c h") #'consult-history)
(global-set-key (kbd "C-c m") #'consult-mode-command)
;; C-x bindings (ctl-x-map)
(define-key ctl-x-map (kbd "M-:") #'consult-complex-command)
(define-key ctl-x-map (kbd "b") #'consult-buffer)
(define-key ctl-x-4-map (kbd "b") #'consult-buffer-other-window)
(define-key ctl-x-5-map (kbd "b") #'consult-buffer-other-frame)
(define-key ctl-x-r-map (kbd "x") #'consult-register)
(define-key ctl-x-r-map (kbd "b") #'consult-bookmark)
;; M-g bindings (goto-map)
(define-key goto-map (kbd "g") #'consult-goto-line)
(define-key goto-map (kbd "M-g") #'consult-goto-line)
(define-key goto-map (kbd "o") #'consult-outline)
(define-key goto-map (kbd "m") #'consult-mark)
(define-key goto-map (kbd "k") #'consult-global-mark)
(define-key goto-map (kbd "i") #'consult-imenu)
(define-key goto-map (kbd "e") #'consult-compile-error)
;; M-s bindings (search-map)
(define-key search-map (kbd "g") #'consult-git-grep)
(define-key search-map (kbd "f") #'consult-find)
(define-key search-map (kbd "k") #'consult-keep-lines)
(define-key search-map (kbd "l") #'consult-line)
(define-key search-map (kbd "m") #'consult-multi-occur)
(define-key search-map (kbd "u") #'consult-focus-lines)
;; Other bindings (current-global-map)
(global-set-key (kbd "M-y") #'consult-yank-pop))Company: a modular complete anything framework for Emacs
Listing lst:setup-company configures company.
(when (fboundp 'company-mode)
;; https://github.com/purcell/emacs.d/issues/778
(setopt company-transformers '(company-sort-by-occurrence))
(dolist (hook '(LaTeX-mode-hook
org-mode-hook
emacs-lisp-mode-hook
lisp-interaction-mode-hook
lisp-mode-hook
python-mode-hook
ielm-mode-hook
sly-mrepl-mode-hook))
(add-hook hook #'company-mode)))Search and replace (info)
Regexp Replace (info)
Executing
(eval
prompts fo a regular expressionREGEXP
and a substitution NEWSTRING to replace REGEXP with NEWSTRING. The tools
in section Narrowing allow to limit the scope of (eval
. A list pointing to relevant documentation is:- Regexp Replace (info) explains how the substitution handles references to regular expression groups and lisp expressions.
- Syntax of Regular Expressions (info) describes regular expression features for users.
- Emacs Lisp Regular Expressions (info) describes regular expression features for programmers.
- Emacs Wiki has an article on replacing regexp with lisp expressions.
Table tab:replace-regexp-tranform tabulates how to perfom example tasks by means of
(eval
using(regular-expression transform) pairs.
| task | regular expression | substitution |
|---|---|---|
| move dot two digits forward | 0\.\([[:digit:]][[:digit:]]\) |
0\1. |
| move dot two digits forward | 0\.\([0-9][0-9]\) |
0\1. |
| renumber grep/occur matches | \(.+:\) |
\,(1+ \#)._ |
Deadgrep
Deadgrep uses ripgrep for superfast text searching in the default directory or
the current VCS directory tree. Listing setup deadgrep commands binds
deadgrep globally to
(eval
anddeadgrep-edit-mode locally to
(eval
.(when (and (ensure-package-installation 'deadgrep)
(fboundp 'deadgrep))
(define-key search-map (kbd "d") #'deadgrep)
(with-eval-after-load 'deadgrep
(define-key deadgrep-mode-map (kbd "C-c C-w") #'deadgrep-edit-mode)))Ugrep
Ugrep is an ultra fast grep with interactive query UI and fuzzy search. The
pages Using ugrep within Emacs and Ugrep in Emacs show how to make Emacs use it
with lgrep and xref. Listing set grep and xref options shows my
implementation of the suggestions on those pages.
(when (executable-find "ugrep")
(with-eval-after-load 'grep
(setopt grep-template (string-join '("ugrep"
"--color=always"
"--decompress"
"--ignore-binary"
"--ignore-case"
"--include=\"<F>\""
"--line-number"
"--null"
"--recursive"
"--regexp=<R>")
" ")))
(with-eval-after-load 'xref
(setopt
xref-search-program 'ugrep
xref-search-program-alist
`((grep . "xargs -0 grep <C> --null -snHE -e <R>")
(ripgrep . ,(concat "xargs -0 rg <C> --null -nH"
" --no-heading --no-messages -g '!*/' -e <R>"))
(ugrep . "xargs -0 ugrep <C> --null -ns -e <R>")))))XR - Emacs regexp parser and analyzer
XR converts Emacs regular expressions to the structured rx form, thus being an
inverse of rx. It can also find mistakes and questionable constructs inside
regexp strings.
(when (ensure-package-installation 'xr))Version Control (info)
Ediff (info)
Video links to complete the ediff (info) manual are:
Listing lst:setup-ediff configures ediff to display all its buffers in a
single frame and to make all text visible prior to ediffing Org buffers.
(with-eval-after-load 'emacs
(setopt ediff-merge-split-window-function #'split-window-horizontally
ediff-split-window-function #'split-window-horizontally
ediff-window-setup-function #'ediff-setup-windows-plain))
(with-eval-after-load 'org
;; https://github.com/oantolin/emacs-config#readme
(defun ediff-with-org-show-all ()
"Expand all headings prior to ediffing org buffers."
(add-hook 'ediff-prepare-buffer-hook #'org-fold-show-all nil t))
(add-hook 'org-mode-hook #'ediff-with-org-show-all))Git
How to push new branches to remote repositories on Github or Gitlab explains how
to do this from the command line. Listing
lst:forking-and-branching-remote-repositories shows an example work flow of
command line git and nano invocations. I did yet not figure out how to do
this by means of Magit (info): I still have to understand Magit pushing (info)
and to figure out how to use src_emacs-lisp{(magit-push-current-to-pushremote)}
or src_emacs-lisp{(magit-push-current-to-upstream)}.
# Clone the repository
git clone git@github.com:gav451/engrave-faces engrave-faces-fork
cd engrave-face-fork
# Handle 1st branch:
# - Create and switch to a new branch with either:
git switch -c latex-engrave-symbolic-color-names
# or: git checkout -b latex-engrave-symbolic-color-names
# - Use "--set-upstream origin" as a 1st-time branch push:
git push --set-upstream origin latex-engrave-symbolic-color-names
# - Create, add, and commit, and push changes in this branch:
nano engrave-faces-latex.el
git add engrave-faces-latex.el
git commit -m 'Commit latex-engrave-dont-symbolic-color-names changes'
git push
# - Switch to master branch:
git checkout master
# Handle 2nd branch:
# - Create and switch to a new branch with either:
git switch -c latex-engrave-dont-wrap-white-space
# - or: git checkout -b latex-engrave-dont-wrap-white-space
# - Use "--set-upstream origin" as a 1st-time branch push:
git push --set-upstream origin latex-engrave-dont-wrap-white-space
# - Create, add, commit, and push changes in this branch:
nano engrave-faces-latex.el
git add engrave-faces-latex.el
git commit -m 'Commit latex-engrave-dont-wrap-white-space changes'
git push
# - Switch to master branch:
git checkout masterList all Git branches
git -C ~/VCS/engrave-faces-fork branch -a* gav latex-engrave-dont-wrap-white-space latex-engrave-symbolic-color-names master remotes/origin/HEAD -> origin/master remotes/origin/gav remotes/origin/latex-engrave-dont-wrap-white-space remotes/origin/latex-engrave-symbolic-color-names remotes/origin/master
Magit (info)
Magit (info) is an Emacs interface to the version control system Git and the snippet below ensures its installation.
(ensure-package-installation 'magit)Reading
Reading DjVu files
This setup relies on Document View (info) to facilitate reading DjVu files.
Reading the code shown by src_emacs-lisp{(find-function
'doc-view-djvu->tiff-converter-ddjvu)} shows that reading DjVu files requires
the command line DjVu decoder ddjvu from the DjVuLibre utilities.
Reading EPUB files
The package nov.el provides a major mode for reading EPUB files in Emacs. Listing lst:configure-nov configures nov.el.
(when (and (ensure-package-installation 'nov)
(fboundp 'nov-mode))
(add-to-list 'auto-mode-alist `(,(rx ".epub" eos) . nov-mode)))Reading PDF files
The pdf-tools package exploits the poppler library to render and to let you
annotate PDF files. It also exploits the SyncTeX library to link anchors in PDF
files produced with LaTeX to the original LaTeX sources. The saveplace-pdf-view
package saves pdf-view and doc-view places.
In order to use pdf-tools, you have to type
(eval
after installation of pdf-tools from MELPA or after each update of poppler to build or rebuild theepdfinfo executable that serves the PDF files to Emacs.
(when (and (ensure-package-installation 'pdf-tools 'saveplace-pdf-view)
(fboundp 'pdf-loader-install))
;; `pdf-loader-install' is the lazy equivalent of `pdf-tools-install':
;; see the README file.
(pdf-loader-install)
(with-eval-after-load 'pdf-outline
;; Unmask the `image-save' key binding in `pdf-view-mode-map' and
;; in `image-mode-map' (by parenthood).
(define-key pdf-outline-minor-mode-map (kbd "o") nil)
(define-key pdf-outline-minor-mode-map (kbd "O") #'pdf-outline))
(with-eval-after-load 'pdf-view
(setopt pdf-view-display-size 'fit-page
pdf-view-use-scaling (eq system-type 'darwin))
(require 'saveplace-pdf-view nil 'noerror)))Writing
Writing LaTeX files
Loading tex.el immediately instead of lazily ensures proper initialization of
AUCTeX. In particular, the TeX-master safe local variable in the tex.el
elisp library file has no autoload cookie. Without prior loading of tex.el,
Emacs will complain that TeX-master is no safe local variable in case it reads
a LaTeX file that sets TeX-master. The list below summarizes the main AUCTeX
configuration objectives:
- Listing lst:set-tex-options ensures installation of AUCTeX and initializes
AUCTeX properly for
LuaTeXorLuaLaTeX. - Listing lst:set-tex-options also enables indenting between square brackets which is a recent feature.
- Listing lst:update-lualatex-opentype-font-name-database defines a function to
update the
OpenType Fontname database forLuaLaTeXwhen the output ofLuaLaTeXshows missing fonts. - Listing lst:set-bibtex-options configures the Emacs
bibtexlibrary to use the LaTeXBiBTeXdialect for backwards compatibility. - Listing lst:set-font-latex-options disables font scaling of section titles.
- Listing lst:set-latex-options configures
latexfor a full featuredLaTeX-section-command.
(when (ensure-package-installation 'auctex)
;; Use `require' to make `TeX-master' a safe local variable.
(when (require 'tex nil 'noerror)
(setopt
TeX-auto-save t
TeX-engine 'luatex
TeX-indent-close-delimiters "]"
TeX-indent-open-delimiters "["
TeX-install-font-lock #'font-latex-setup
TeX-parse-self t
;; Disable `TeX-electric-math' to prevent collisions with `smartparens'.
TeX-electric-math nil)))(with-eval-after-load 'emacs
(defun update-lualatex-opentype-font-name-database ()
"Update the \"OpenType Font\" name database for \"LuaLaTeX\"."
(interactive)
(cl-destructuring-bind (exit-code output)
(shell-command-with-exit-code
"luaotfload-tool" "-vv" "--update" "--force")
(if (= 0 exit-code)
(message "%s" (string-trim output))
(error "%s" (string-trim output))))))(with-eval-after-load 'bibtex
(setopt bibtex-dialect 'BibTeX))(with-eval-after-load 'font-latex
(setopt font-latex-fontify-sectioning 1.0))(with-eval-after-load 'latex
(setopt LaTeX-electric-left-right-brace t
LaTeX-section-hook '(LaTeX-section-heading
LaTeX-section-title
LaTeX-section-toc
LaTeX-section-section
LaTeX-section-label)))Math-preview
Math-preview uses Mathjax-3 to display LaTeX, MathML,and asciimath in Emacs buffers with help of an external node.js program.
(when (ensure-package-installation 'math-preview)
(with-eval-after-load 'math-preview
;; https://docs.mathjax.org/en/latest/input/tex/extensions/physics.html
(let ((physics (split-string "
abs absolutevalue acomm acos acosecant acosine acot acotangent
acsc admat anticommutator antidiagonalmatrix arccos arccosecant
arccosine arccot arccotangent arccsc arcsec arcsecant arcsin
arcsine arctan arctangent asec asecant asin asine atan atangent
bmqty bqty Bqty bra braket comm commutator cos cosecant cosh
cosine cot cotangent coth cp cross crossproduct csc csch curl dd
derivative det determinant diagonalmatrix diffd differential div
divergence dmat dotproduct dv dyad erf ev eval evaluated exp
expectationvalue exponential expval fderivative fdv flatfrac
functionalderivative grad gradient gradientnabla hypcosecant
hypcosine hypcotangent hypsecant hypsine hyptangent
identitymatrix Im imaginary imat innerproduct ip ket ketbra
laplacian ln log logarithm matrixdeterminant matrixel
matrixelement matrixquantity mdet mel mqty naturallogarithm norm
op order outerproduct partialderivative paulimatrix pb
pderivative pdv pmat pmqty Pmqty poissonbracket pqty Pr
principalvalue Probability pv PV qall qand qas qassume qc qcc
qcomma qelse qeven qfor qgiven qif qin qinteger qlet qodd qor
qotherwise qq qqtext qsince qthen qty quantity qunless qusing
rank Re real Res Residue sbmqty sec secant sech sin sine sinh
smallmatrixquantity smdet smqty spmqty sPmqty svmqty tan tangent
tanh tr Tr trace Trace va var variation vb vdot vectorarrow
vectorbold vectorunit vmqty vnabla vqty vu xmat xmatrix
zeromatrix zmat")))
(cl-pushnew `("physics" . ,physics)
math-preview-tex-packages-autoload-packages))
(setq math-preview-raise 0.5
math-preview-scale 1
math-preview-tex-default-packages '("autoload" "ams" "physics"))
(let ((command (executable-find "~/node_modules/.bin/math-preview")))
(if command
(setq math-preview-command command)
;; https://stackoverflow.com/a/17509764 answers:
;; How to install an npm package from github directly?
(unless (file-directory-p "~/node_modules")
(make-directory "~/node_modules"))
(cl-destructuring-bind (exit-code output)
(shell-command-with-exit-code
"npm" "install"
"git+https://gitlab.com/matsievskiysv/math-preview.git")
(if (= 0 exit-code)
(message "%s" (string-trim output))
(error "%s" (string-trim output))))))))TODO Improve the AUCTeX configuration slowly
Writing Markdown files
(when (ensure-package-installation 'markdown-mode))Writing Org (info) files
The Org Babel reference card complements section Working with Source Code (info) of the Org (info) manual.
Org activation (info)
(with-eval-after-load 'emacs
(global-set-key (kbd "C-c a") #'org-agenda)
(global-set-key (kbd "C-c c") #'org-capture)
(with-eval-after-load 'ol
(global-set-key (kbd "C-c l") #'org-store-link)
(global-set-key (kbd "C-c C-l") #'org-insert-link-global)))Setup Org
I have split the initial Org-mode setup over several listings. Here, follows a list detailing and motivating each listing:
- Listing lst:set-org-options handles basic Org-mode options.
- Listing lst:setup-org-babel handles basic Org-mode options specific to work with source code (info).
- Listing lst:set-org-link-options handles Org-mode options specific to hyperlinks (info).
- Listing lst:setup-org-mode-map extends the
org-mode-mapwith useful key-bindings. - Listing lst:setup-org-src facilitates editing Python source code blocks,
and it provides a function to remove the indentation of all
org-src-modeblocks without-iswitch. - Listing lst:setup-ob-python allows to pretty-print Python session source block values with black instead of pprint.
- Listing lst:set-org-export-options selects the
non-intrusiveexpert user interface for export dispatching. - Listing lst:setup-org-for-lualatex-export and lst:set-ox-latex-options-for-lualatex-export configure Org-mode to generate output for the LuaLaTeX compiler.
- Listing lst:setup-org-latex-classes defines org-latex-classes (info) for
backward compatibility. See table tab:org-latex-class-tag-placeholder and
type
(eval
for an explanation of the code in listing lst:setup-org-latex-classes.
(with-eval-after-load 'org
(setopt
org-babel-load-languages
`((C . t)
(calc . t)
(dot . ,(fboundp 'grapviz-dot-mode))
(emacs-lisp . t)
;; (eshell . t) ; bug
(fortran . t)
(gnuplot . ,(fboundp 'gnuplot-mode))
(js . t)
(latex . t)
(lisp . t)
;; (lua . ,(fboundp 'lua-mode)) ; bug
(maxima . ,(fboundp 'maxima-mode))
(org . t)
(perl . t)
;; Postpone Python activation to prevent calling still unbound functions.
(python . nil)
(shell . t))
org-export-backends '(ascii beamer html icalendar latex odt texinfo)
org-file-apps '((auto-mode . emacs)
(directory . emacs)
("\\.mm\\'" . default)
("\\.x?html?\\'" . default)
("\\.pdf\\'" . emacs))
org-modules '(ol-bibtex
ol-doi
ol-eww
ol-info
org-id
org-protocol
org-tempo)
org-structure-template-alist '(("a" . "export ascii")
("c" . "center")
("C" . "comment")
("e" . "example")
("E" . "export")
("h" . "export html")
("l" . "export latex")
("q" . "quote")
("s" . "src")
("p" . "src python -n -i :session")
("v" . "verse"))))(with-eval-after-load 'ob-core
(setopt org-confirm-babel-evaluate nil))
(with-eval-after-load 'ob-latex
(setopt
org-babel-latex-preamble (lambda (_)
"\\documentclass[preview]{standalone}\n")
org-babel-latex-begin-env (lambda (_)
"\\begin{document}\n")
org-babel-latex-end-env (lambda (_)
"\\end{document}\n")))
(with-eval-after-load 'ob-lisp
(with-eval-after-load 'sly
(setopt org-babel-lisp-eval-fn #'sly-eval)))
(with-eval-after-load 'emacs
(defun set-org-babel-language-activity (lang active)
"Set the `org-babel' activity of language LANG to ACTIVE.
Let `org-babel-do-load-languages' load ob-LANG when ACTIVE is t or
unbind the `org-babel' interface functions when ACTIVE is nil."
(if (locate-library (format "ob-%s" lang))
(or (org-babel-do-load-languages
'org-babel-load-languages
(cons (cons lang active)
(assq-delete-all
lang (default-toplevel-value 'org-babel-load-languages))))
org-babel-load-languages)
(warn "Can't locate `ob-%s', hence don't set `%s' activity" lang lang)))
(defun activate-org-babel-language (lang)
"Activate LANG for `org-babel'."
(interactive "SActivate language: ")
(if (set-org-babel-language-activity lang t)
(message "Did activate `%s' for `org-babel'" lang)
(message "Can't activate `%s' for `org-babel'" lang)))
(defun deactivate-org-babel-language (lang)
"Activate LANG for `org-babel'."
(interactive "SDeactivate language: ")
(if (set-org-babel-language-activity lang nil)
(message "Did deactivate `%s' for `org-babel'" lang)
(message "Can't deactivate `%s' for `org-babel'" lang)))
;; Work around a "(defcustom org-babel-load-languages)" call bug.
(set-org-babel-language-activity 'eshell t)
(set-org-babel-language-activity 'lua (fboundp 'lua-mode)))(with-eval-after-load 'ol
(setopt org-link-file-path-type 'relative))(with-eval-after-load 'emacs
;; From: "Nicolas Richard" <theonewiththeevillook@yahoo.fr>
;; Date: Fri, 08 Mar 2013 16:23:02 +0100 [thread overview]
;; Message-ID: <87vc913oh5.fsf@yahoo.fr> (raw)
(defun org-electric-dollar ()
"When called once, insert \\(\\) and leave point in between.
When called twice, replace the previously inserted \\(\\) by one $."
(interactive)
(if (and (looking-at "\\\\)") (looking-back "\\\\(" (- (point) 2)))
(progn (delete-char 2)
(delete-char -2)
(insert "$"))
(insert "\\(\\)")
(backward-char 2)))
(defun org-active-current-time-stamp ()
"Insert an active date-time stamp of the current time."
(interactive)
(if (fboundp 'org-insert-time-stamp)
(org-insert-time-stamp (current-time) 'with-hm)
(let ((stamp (format-time-string "<%Y-%m-%d %a %H:%M>" (current-time))))
(insert stamp)
stamp)))
(defun org-inactive-current-time-stamp ()
"Insert an inactive date-time stamp of the current time."
(interactive)
(if (fboundp 'org-insert-time-stamp)
(org-insert-time-stamp (current-time) 'with-hm 'inactive)
(let ((stamp (format-time-string "[%Y-%m-%d %a %H:%M]" (current-time))))
(insert stamp)
stamp)))
(with-eval-after-load 'org
(setopt org-return-follows-link t)
(define-key org-mode-map
(kbd "C-c <SPC>") #'org-inactive-current-time-stamp)
(define-key org-mode-map
(kbd "C-c C-<SPC>") #'org-active-current-time-stamp)
(define-key org-mode-map (kbd "$") #'org-electric-dollar)
(define-key org-mode-map (kbd "M-q") #'org-fill-paragraph)))(with-eval-after-load 'emacs
(with-eval-after-load 'org-src
(setopt org-src-preserve-indentation t))
(declare-function org-babel-map-src-blocks "ext:ob-core" (file &rest body))
(declare-function org-do-remove-indentation "ext:org-macs" (n skip-fl))
(defun zero-all-org-src-blocks-indentation ()
"Remove the indentation of all `org-src-mode' blocks without `-i' switch."
(interactive)
(when (derived-mode-p 'org-mode)
(save-excursion
(org-babel-map-src-blocks
nil
(unless (or (string-match "-i " switches)
(string-match (rx (or bos bol) graph) body))
(when-let ((new (with-temp-buffer
(insert body)
(org-do-remove-indentation)
(buffer-string))))
(goto-char beg-body)
(delete-region beg-body end-body)
(insert new))))))))(with-eval-after-load 'ob-python
(defun org-babel-python-format-session-value-override
(src-file result-file result-params)
"Return Python code to evaluate SRC-FILE and write result to RESULT-FILE.
Use `black' instead of `pprint' when \"pp\" is a member of RESULT-PARAMS."
(format "\
import ast
with open('%s') as __org_babel_python_tmpfile:
__org_babel_python_ast = ast.parse(__org_babel_python_tmpfile.read())
__org_babel_python_final = __org_babel_python_ast.body[-1]
if isinstance(__org_babel_python_final, ast.Expr):
__org_babel_python_ast.body = __org_babel_python_ast.body[:-1]
exec(compile(__org_babel_python_ast, '<string>', 'exec'))
__org_babel_python_final = eval(
compile(ast.Expression(__org_babel_python_final.value), '<string>', 'eval')
)
with open('%s', 'w') as __org_babel_python_tmpfile:
if %s:
import black
__org_babel_python_tmpfile.write(
black.format_str(repr(__org_babel_python_final), mode=black.Mode())
)
else:
__org_babel_python_tmpfile.write(str(__org_babel_python_final))
else:
exec(compile(__org_babel_python_ast, '<string>', 'exec'))
__org_babel_python_final = None"
(org-babel-process-file-name src-file 'noquote)
(org-babel-process-file-name result-file 'noquote)
(if (member "pp" result-params) "True" "False")))
(advice-add 'org-babel-python-format-session-value
:override #'org-babel-python-format-session-value-override))(with-eval-after-load 'ox
(setopt org-export-dispatch-use-expert-ui t))(with-eval-after-load 'org
;; https://list.orgmode.org/87o84fd4oi.fsf@posteo.net/
(add-to-list
'org-preview-latex-process-alist
'(luamagick
:programs ("lualatex" "convert")
:description "pdf > png"
:message "you need to install lualatex and imagemagick."
:image-input-type "pdf"
:image-output-type "png"
:image-size-adjust (1.0 . 1.0)
:post-clean nil
:latex-header nil
:latex-compiler ("lualatex -interaction nonstopmode -output-directory %o %f")
:image-converter ("convert -density %D -trim -antialias %f -quality 100 %O")))
(setopt
org-preview-latex-default-process 'luamagick
org-latex-default-packages-alist '(("" "fontspec" t ("lualatex"))
("AUTO" "inputenc" t ("pdflatex"))
("T1" "fontenc" t ("pdflatex"))
("" "graphicx" t)
("" "longtable" nil)
("" "wrapfig" nil)
("" "rotating" nil)
("normalem" "ulem" t)
("" "amsmath" t)
("" "amssymb" t)
("" "capt-of" nil)
("" "hyperref" nil))))(with-eval-after-load 'ox-latex
(setopt
org-latex-compiler "lualatex"
org-latex-hyperref-template "\\hypersetup{
pdfauthor={%a},
pdftitle={%t},
pdfkeywords={%k},
pdfsubject={%d},
pdfcreator={%c},
pdflang={%L},
citecolor=blue,
colorlinks=true,
filecolor=blue,
hyperfootnotes=false,
linkcolor=blue,
unicode=true,
urlcolor=blue,
}\n"
org-latex-src-block-backend 'minted
org-latex-minted-langs '((cc "c++")
(conf "text")
(cperl "perl")
(diff "diff")
(shell-script "bash")
(json "json")
(org "text")
(toml "toml"))
org-latex-minted-options '(("bgcolor" "LightGoldenrodYellow"))
org-latex-logfiles-extensions
(cl-union '("lof" "lot") org-latex-logfiles-extensions :test #'equal)
;; https://tecosaur.github.io/emacs-config/#compiling
org-latex-pdf-process (list (concat "latexmk -f -pdf -%latex"
" -interaction=nonstopmode"
" -shell-escape -outdir=%o %f"))
org-latex-prefer-user-labels t
org-latex-subtitle-separate t))(with-eval-after-load 'ox-latex
(mapc (function (lambda (element)
(add-to-list 'org-latex-classes element)))
(nreverse
(quote (("elsarticle-1+2+3" ; Elsevier journals
"\\documentclass{elsarticle}
[NO-DEFAULT-PACKAGES]
[PACKAGES]
[EXTRA]"
("\\section{%s}" . "\\section*{%s}")
("\\subsection{%s}" . "\\subsection*{%s}")
("\\subsubsection{%s}" . "\\subsubsection*{%s}")
("\\paragraph{%s}" . "\\paragraph*{%s}")
("\\subparagraph{%s}" . "\\subparagraph*{%s}"))
("article-1+2+3"
"\\documentclass{article}
[NO-DEFAULT-PACKAGES]
[PACKAGES]
[EXTRA]"
("\\section{%s}" . "\\section*{%s}")
("\\subsection{%s}" . "\\subsection*{%s}")
("\\subsubsection{%s}" . "\\subsubsection*{%s}")
("\\paragraph{%s}" . "\\paragraph*{%s}")
("\\subparagraph{%s}" . "\\subparagraph*{%s}"))
("report-1+2+3"
"\\documentclass[11pt]{report}
[NO-DEFAULT-PACKAGES]
[PACKAGES]
[EXTRA]"
("\\part{%s}" . "\\part*{%s}")
("\\chapter{%s}" . "\\chapter*{%s}")
("\\section{%s}" . "\\section*{%s}")
("\\subsection{%s}" . "\\subsection*{%s}")
("\\subsubsection{%s}" . "\\subsubsection*{%s}"))
("book-1+2+3"
"\\documentclass[11pt]{book}
[NO-DEFAULT-PACKAGES]
[PACKAGES]
[EXTRA]"
("\\part{%s}" . "\\part*{%s}")
("\\chapter{%s}" . "\\chapter*{%s}")
("\\section{%s}" . "\\section*{%s}")
("\\subsection{%s}" . "\\subsection*{%s}")
("\\subsubsection{%s}" . "\\subsubsection*{%s}")))))))#+caption[The relation tag-placeholder in listing lst:setup-org-latex-classes]:
| tag | placeholder |
|---|---|
| +1 | [DEFAULT-PACKAGES] |
| +2 | [PACKAGES] |
| +3 | [EXTRA] |
| -1 | [NO-DEFAULT-PACKAGES] |
| -2 | [NO-PACKAGES] |
| -3 | [NO-EXTRA] |
Citar: citing bibliography with Org Mode
Citar is a completing-read front-end to browse and act on BibTeX, BibLaTeX, as
well as CSL JSON bibliographic data with LaTeX, markdown, and org-cite editing
support. In combination with vertico, embark, marginalia, and consult, Citar
provides quick filtering and selecting of bibliographic entries from the
minibuffer as well as the option to run different commands on those
selections. The article Citations in org-mode: Org-cite and Citar tries to walk
you from understanding the general context (bibliography producer, text
processor, text to product convertor) to an Emacs setup. Listing
lst:set-org-cite+citar-options shows my org-cite, citar, and org setup.
(with-eval-after-load 'oc
;; Org-9.5 needs the requirements, but Org-9.6 does not.
(when (version< (org-version) "9.6")
(require 'oc-biblatex)
(require 'oc-csl)))
(with-eval-after-load 'org
(define-key org-mode-map (kbd "C-c b") #'org-cite-insert))
(when (ensure-package-installation 'citar 'citar-embark)
(with-eval-after-load 'embark
(when (fboundp 'citar-embark-mode)
(citar-embark-mode +1)))
(when (require 'citar nil 'noerror)
(setopt citar-bibliography '("~/VCS/research/refs.bib")
citar-library-file-extensions '("djvu" "pdf")
citar-library-paths '("~/VCS/research/papers/")))
(with-eval-after-load 'oc
(setopt org-cite-export-processors '((latex biblatex)
(t csl))
org-cite-global-bibliography '("~/VCS/research/refs.bib"))
(when (require 'citar nil 'noerror)
(setopt org-cite-activate-processor 'citar
org-cite-follow-processor 'citar
org-cite-insert-processor 'citar))))
Ref. [cite:@Schulte.MCSE.2011.41] shows that Org-mode is a simple, plain-text
markup language for hierarchical documents allowing intermingling of data, code,
and prose. It serves as an example link to to show how to use Citar within this
setup, provided that citar-bibliography and citar-library-paths point to
valid directories and files. In an Org-mode buffer this setup allows to:
-
Insert one or more Org-mode cite links:
- Type .
-
Navigate to a bibliographic entry to insert:
- Select it with
(eval
to select more entries. - Select it with
(eval
to select the last entry.
- Select it with
-
View an electronic copy of an Org-mode cite link:
- Move point to the Org-mode cite link.
- Type .
- Navigate to the corresponding library file.
- Select it.
-
Open the DOI of an Org-mode cite link:
- Move point to the Org-mode cite link.
- Type .
- Navigate to the corresponding link.
- Select it.
TODO Compare bibtex and biblatex
- Using bibtex: a short guide
- The biblatex package
- Rebiber: A tool for normalizing bibtex with official info
- A biblatex implementation of the AIP and APS bibliography style
(with-eval-after-load 'emacs
;; https://tex.stackexchange.com/a/579356 answers
;; "How to solve Biber exiting with error code 2 but no error messages?"
(defun biber-delete-cache ()
"Delete the `Biber' cache to get rid of `Biber' exit code 2."
(interactive)
(cl-destructuring-bind (exit-code output)
(shell-command-with-exit-code "rm" "-rf" "$(biber --cache)")
(if (= 0 exit-code)
(message "%s" (string-trim output))
(error "%s" (string-trim output))))))Engrave Faces
This package has a front-end that processes fontified buffers and pipes its
output into one of three back-ends for export to LaTeX, HTML and text with ANSI
escape codes. It is an alternative to minted in case of LaTeX export or to
htmlized in case of HTML export.
The listings below work around one issue with spacing in the pdf output
resulting from use of the engraved source block back-end during LaTeX
export. They increase the quality of the export results of this README.org and
the user-friendliness of this facility to a level acceptable for my workflow:
- The default Org export configuration for engraving listings produces
pdfoutput with a non-equidistant interline spacing in floating listings (those with captions) and equidistant interline spacing in non-floatingtcolorboxenvironments (those without captions). I have traced the non-equidistant interline spacing back to thebreakableoption ofCodeenvironments insidelistingenvironments. However,tcolorboxrequiresbreakablefor listings that do not fit on a page. The filterorg-latex-engraved-source-block-filterin listing lst:org-latex-engraved-source-block-filter and theorg-latex-engraved-preamblecustomization in listing lst:smart-latex-engrave-org-source-blocks allow to engraveorg-modesource blocks to "floating unbreakable with caption" or "non-floating breakable without caption" LaTeX environments. This is a partial work-around, but part of my workflow. - Listing lst:ox-engraved-emacs-lisp-setup shows how to use this configuration.
(ensure-package-installation 'engrave-faces)
(defun org-latex-engraved-source-block-filter (data _backend _info)
"Replace \"Code\" with \"Breakable\" in non-floating environments.
Set `org-latex-engraved-preamble' to define a Breakable (non-floating)
environment and an unbreakable Code (floating) environment."
(unless (string-match "^\\\\DeclareTColorBox\\[\\]{Breakable}"
org-latex-engraved-preamble)
(user-error "`org-latex-engraved-preamble' defines no `Breakable' environment"))
(when (eq org-latex-src-block-backend 'engraved)
(let ((enter "^\\\\begin{Code}\n\\\\begin{Verbatim}")
(leave "^\\\\end{Verbatim}\n\\\\end{Code}"))
;; Transform only blocks matching the enter regexp at position 0.
;; Do not transform blocks that are listing environments.
(when (and (string-match enter data) (eql 0 (match-beginning 0)))
(setq data (replace-match
"\\begin{Breakable}\n\\begin{Verbatim}" t t data))
(when (string-match leave data (match-end 0))
(setq data (replace-match
"\\end{Verbatim}\n\\end{Breakable}" t t data))
(when (string-match enter data)
(user-error "The `enter' regexp `%s' should not match" enter))
(when (string-match leave data)
(user-error "The `leave' regexp `%s' should not match" leave))
data)))))(defun smart-latex-engrave-org-source-blocks ()
"Enable smart LaTeX engraving of `org-src-mode' blocks.
Sets backend and preamble locally to support floating unbreakable LaTeX
environments and non-floating breakable LaTeX environments by means of
`org-latex-engraved-source-block-filter'."
(interactive)
(when (require 'ox-latex nil 'noerror)
(setq-local org-latex-src-block-backend 'engraved
org-latex-engraved-preamble "\\usepackage{fvextra}
[FVEXTRA-SETUP]
% Make code and line numbers normalsize. Make line numbers grey.
\\renewcommand\\theFancyVerbLine{
\\normalsize\\color{black!40!white}\\arabic{FancyVerbLine}}
% In case engrave-faces-latex-gen-preamble has not been run.
\\usepackage{xcolor}
\\providecolor{EfD}{HTML}{f7f7f7}
\\providecolor{EFD}{HTML}{28292e}
% To use \\DeclareTColorBox from the tcolorbox package:
\\usepackage[breakable,xparse]{tcolorbox}
% Define a Breakable environment to fontify code outside floats.
\\DeclareTColorBox[]{Breakable}{o}{
colback=EfD, colframe=EFD, colupper=EFD,
fontupper=\\normalsize\\setlength{\\fboxsep}{0pt},
IfNoValueTF={#1}{
boxsep=1pt, arc=1pt, outer arc=1pt, boxrule=0.5pt,
}{
boxsep=1pt, arc=0pt, outer arc=0pt, boxrule=0pt, leftrule=1pt
},
left=2pt, right=2pt, top=1pt, bottom=1pt, breakable
}
% Define an unbreakable Code environment to fontify code inside floats.
\\DeclareTColorBox[]{Code}{o}{
colback=EfD, colframe=EFD, colupper=EFD,
fontupper=\\normalsize\\setlength{\\fboxsep}{0pt},
IfNoValueTF={#1}{
boxsep=1pt, arc=1pt, outer arc=1pt, boxrule=0.5pt
}{
boxsep=1pt, arc=0pt, outer arc=0pt, boxrule=0pt, leftrule=1pt
},
left=2pt, right=2pt, top=1pt, bottom=1pt
}
[LISTINGS-SETUP]")))(with-eval-after-load 'ox
(make-variable-buffer-local 'org-export-filter-src-block-functions)
(add-to-list 'org-export-filter-src-block-functions
'org-latex-engraved-source-block-filter)
(when (fboundp 'smart-latex-engrave-org-source-blocks)
(smart-latex-engrave-org-source-blocks)))Making Org hyperlink types (info)
The listings below implement or reimplement three groups of org-link types:
- Listing lst:org-ref-like-org-link-types defines
org-linktypes for backwards compatibility with org-ref. - Listing lst:define-org-pdfview-link-type uses ideas from the definition of
docview-org-linkanddoi-org-linktypes to define anpdfview-org-linktype for use with pdf-tools. - Listing lst:patch-org-info-link-type patches the function
org-info-exportand listing lst:emacs-lisp-setup-buffer-local-ol-info sets the constantsorg-info-emacs-documentsandorg-info-other-documentsas buffer local variables in order to export theinfo-org-linktypes in this document tohtmland LaTeX correctly.
(with-eval-after-load 'ol
(org-link-set-parameters "ac*" :export #'org-ref-ac*-export)
(org-link-set-parameters "cite" :export #'org-ref-cite-export)
(org-link-set-parameters "eqref" :export #'org-ref-eqref-export)
(org-link-set-parameters "hyperlink" :export #'org-ref-hyperlink-export)
(org-link-set-parameters "label" :export #'org-ref-label-export)
(org-link-set-parameters "ref" :export #'org-ref-ref-export)
(defun org-ref-ac*-export (path _desc backend _info)
(pcase backend
(`latex (format "\\gls*{%s}" path))
(_ path)))
(defun org-ref-cite-export (path _desc backend _info)
(pcase backend
(`latex (format "\\cite{%s}" path))
(_ path)))
(defun org-ref-eqref-export (path _desc backend _info)
(pcase backend
(`latex (format "\\eqref{%s}" path))
(_ path)))
(defun org-ref-hyperlink-export (path desc backend _info)
(pcase backend
(`latex (format "\\hyperlink{%s}{%s}" path desc))
(_ path)))
(defun org-ref-label-export (path _desc backend _info)
(pcase backend
(`latex (format "\\label{%s}" path))
(_ path)))
(defun org-ref-ref-export (path _desc backend _info)
(pcase backend
(`latex (format "\\ref{%s}" path))
(_ path))))(with-eval-after-load 'ol
(autoload 'pdf-view-goto-page "pdf-view" nil t)
(org-link-set-parameters "pdfview"
:follow #'org-pdfview-open
:export #'org-pdfview-export
:store #'org-pdfview-store-link)
(defun org-pdfview-export (link description backend _)
"Export a \"pdfview\" type link.
The paths of the links export as file relative paths in order to
facilate moving single directories or whole directory trees."
(let ((path (if (string-match "\\(.+\\)::.+" link)
(match-string 1 link)
link))
(desc (or description link)))
(when (stringp path)
(setq path (file-relative-name path))
(pcase backend
(`html (format "<a href=\"%s\">%s</a>" path desc))
(`latex (format "\\href{%s}{%s}" path desc))
(`ascii (format "%s (%s)" desc path))
(_ path)))))
(defun org-pdfview-open (link _)
"Open a \"pdfview\" type link."
(string-match "\\(.*?\\)\\(?:::\\([0-9]+\\)\\)?$" link)
(let ((path (match-string 1 link))
(page (and (match-beginning 2)
(string-to-number (match-string 2 link)))))
;; Let Org mode open the file (in-emacs = 1) to ensure
;; org-link-frame-setup is respected.
(org-open-file path 1)
(when page (pdf-view-goto-page page))))
(defun org-pdfview-store-link ()
"Store a \"pdfview\" type link."
(when (eq major-mode 'pdf-view-mode)
(let* ((path buffer-file-name)
(page (pdf-view-current-page))
(link (concat "pdfview:" path "::" (number-to-string page))))
(org-link-store-props
:type "pdfview"
:link link
:description path)))))(with-eval-after-load 'ol-info
(defun org-info-export (path desc format)
"Export an info link.
See `org-link-parameters' for details about PATH, DESC and FORMAT."
(let* ((parts (split-string path "#\\|::"))
(manual (car parts))
(node (or (nth 1 parts) "Top")))
(pcase format
(`html
(format "<a href=\"%s#%s\">%s</a>"
(org-info-map-html-url manual)
(org-info--expand-node-name node)
(or desc path)))
(`latex
(format "\\href{%s\\#%s}{%s}"
(org-info-map-html-url manual)
(org-info--expand-node-name node)
(or desc path)))
(`texinfo
(let ((title (or desc "")))
(format "@ref{%s,%s,,%s,}" node title manual)))
(_ nil)))))(with-eval-after-load 'ol-info
(make-variable-buffer-local 'org-info-emacs-documents)
(setq org-info-emacs-documents (delete "org" org-info-emacs-documents))
(make-variable-buffer-local 'org-info-other-documents)
(setq org-info-other-documents
(cl-union
'(("consult" . "https://github.com/minad/consult")
("embark" . "https://github.com/oantolin/embark")
("magit" . "https://magit.vc/manual/magit.html")
("marginalia" . "https://github.com/minad/marginalia")
("maxima" .
"https://maxima.sourceforge.io/docs/manual/maxima_singlepage.html")
("org" . "https://orgmode.org/org.html")
("orderless" . "https://github.com/oantolin/orderless")
("sly" . "https://joaotavora.github.io/sly/")
("vertico" . "https://github.com/minad/vertico"))
org-info-other-documents :test #'equal)))Extending org-mode to handle YouTube links
Listing define org-yt-link type implements code to open the link to the following YouTube video Extending org-mode to handle YouTube links.
The following posts provide programming information:
- YouTube API reference.
- YouTube Player API reference for iframe embeds.
- How to link to a specific timestamp in a YouTube video.
(defun org-yt-time-to-seconds (text)
"Convert TEXT of the form `12:34:56' or `12h34m56s' to seconds as integers."
(let* ((case-fold-search t)
(hms (< (length (split-string text "[:]"))
(length (split-string text "[HhMmSs]"))))
(regexp (if hms
(rx (opt (group (+ digit) "h"))
(opt (group (+ digit) "m"))
(opt (group (+ digit) "s")))
(rx (opt (group (+ digit)))
(opt ":" (group (+ digit)))
(opt ":" (group (+ digit))))))
(_ (string-match regexp text))
(md (match-data))
(found (substring text (pop md) (pop md)))
(seconds 0)
lot)
(if (string< found text)
(user-error "Found `%s' which is a prefix of `%s'" found text)
(if hms
(while md
(setq lot (substring text (or (pop md) 0) (or (pop md) 0)))
(cond
((or (string-suffix-p "h" lot) (string-suffix-p "H" lot))
(setq seconds (+ seconds (* 3600 (string-to-number lot)))))
((or (string-suffix-p "m" lot) (string-suffix-p "M" lot))
(setq seconds (+ seconds (* 60 (string-to-number lot)))))
((or (string-suffix-p "s" lot) (string-suffix-p "S" lot))
(setq seconds (+ seconds (string-to-number lot))))))
(while md (push (string-to-number
(substring text (or (pop md) 0) (or (pop md) 0)))
lot))
(cond
((length= lot 1) (setq seconds (car lot)))
((length= lot 2) (setq seconds (+ (* 60 (cadr lot))
(car lot))))
((length= lot 3) (setq seconds (+ (* 3600 (caddr lot))
(* 60 (cadr lot))
(car lot)))))))
seconds))(defun org-yt-seconds-to-hms (seconds)
"Convert seconds as integers to text of the form `12h34m56s'."
(let ((h (/ seconds 3600))
(m (/ (% seconds 3600) 60))
(s (% seconds 60)))
(concat (and (> h 0) (format "%dh" h))
(if (> h 0)
(format "%02dm" m)
(and (> m 0) (format "%dm" m)))
(if (or (> h 0) (> m 0))
(format "%02ds" s)
(format "%ds" s)))))
(defconst org-yt-start
"https://www.youtube.com/watch?v=%s&t=%s"
"Format string for `org-yt-format-open-url' to fill in ID and TIMING.")
(defconst org-yt-chunk
"https://www.youtube.com/embed/%s?autoplay=1&start=%d&end=%d"
"Format string for `org-yt-format-open-url' to fill in ID and TIMING.")
(defun org-yt-format-open-url (id timing)
"Convert an \"yt\" type link to an URL for opening."
(cond
((not timing)
(format org-yt-start id "0s"))
((length= timing 1)
(format org-yt-start id
(org-yt-seconds-to-hms (org-yt-time-to-seconds (car timing)))))
((length= timing 2)
(format org-yt-chunk id
(org-yt-time-to-seconds (car timing))
(org-yt-time-to-seconds (cadr timing))))))(defconst org-yt-iframe
"<iframe
frameborder=\"0\" width=\"600\" height=\"450\"
src=\"https://www.youtube.com/embed/%s%s\"
title=\"%s\"
allowfullscreen></iframe>"
"Format string for `org-yt-iframe' to fill in ID, TIMING, and TITLE.")
(defun org-yt-format-iframe (id timing title)
"Convert an \"yt\" type link to an inline frame element for export to HTML."
(format org-yt-iframe id
(cond
((not timing) "")
((length= timing 1)
(format "?start=%d" id (org-yt-time-to-seconds (car timing))))
((length= timing 2)
(format "?start=%d&end=%d"
(org-yt-time-to-seconds (car timing))
(org-yt-time-to-seconds (cadr timing)))))
title))(defun org-yt-open (path prefix)
"Open an \"yt\" type link with `browse-url', `emms', or \"mpv\".
PATH is a string containing the video ID and optional timing information.
Open the link with `browse-url' if PREFIX else with `emms' or \"mpv\"."
(let* ((parts (split-string path "[#]+" t))
(id (car parts))
(timing (cdr parts))
(url (org-yt-format-open-url id timing)))
(cond
(prefix
(browse-url url))
((require 'emms nil 'noerror)
(emms-add-url url)
(with-current-emms-playlist
(save-excursion
(emms-playlist-last)
(emms-playlist-mode-play-current-track))))
((executable-find "mpv")
(let ((display-buffer-alist
`((,shell-command-buffer-name-async . (display-buffer-no-window)))))
(async-shell-command (format "\"%s\" \"%s\"" url)))
(message "Launched mpv with \"%s\"" url))
(t
(user-error "Can't open `%s': install `emms' and/or `mpv'" url)))))
(defun org-yt-export (path desc backend _)
"Export an \"yt\" type link."
(let* ((parts (split-string path "[#]+" t))
(id (car parts))
(timing (cdr parts)))
(pcase backend
(`html
(org-yt-format-iframe id timing desc))
(`latex
(format "\\href{%s}{%s}" (org-yt-format-open-url id timing) desc))
(_ id))))
(with-eval-after-load 'ol
;; https://bitspook.in/blog/extending-org-mode-to-handle-youtube-paths/
(org-link-set-parameters "yt"
:follow #'org-yt-open
:export #'org-yt-export))Translate capital keywords (old) to lower case (new)
(with-eval-after-load 'emacs
;; https://tecosaur.github.io/emacs-config/#translate-capital-keywords
(defun org-syntax-convert-keyword-case-to-lower ()
"Convert all #+KEYWORDS to #+keywords."
(interactive)
(when (derived-mode-p 'org-mode)
(save-excursion
(goto-char (point-min))
(let ((count 0)
(case-fold-search nil))
(while (re-search-forward "^[ \t]*#\\+[A-Z_]+" nil t)
(unless (s-matches-p "RESULTS" (match-string 0))
(replace-match (downcase (match-string 0)) t)
(setq count (1+ count))))
(message "Replaced %d keywords" count))))))Evaluate specific source blocks at load-time
How to do load time source block evaluation
(with-eval-after-load 'emacs
(defun org-eval-named-blocks-with-infix (infix)
"Evaluate all source blocks having INFIX in their name."
(when (eq major-mode 'org-mode)
(let ((blocks
(org-element-map
(org-element-parse-buffer 'greater-element nil) 'src-block
(lambda (block)
(when-let ((name (org-element-property :name block)))
(when (string-match-p infix name) block))))))
(dolist (block blocks)
(goto-char (org-element-property :begin block))
(org-babel-execute-src-block)))))
(defun org-eval-emacs-lisp-setup-blocks ()
"Evaluate all source blocks having \"emacs-lisp-setup\" in their name."
(interactive)
(org-eval-named-blocks-with-infix "emacs-lisp-setup"))
(defun org-eval-python-setup-blocks ()
"Evaluate all source blocks having \"python-setup\" in their name."
(interactive)
(org-eval-named-blocks-with-infix "python-setup"))
;; Emacs looks for "Local variables:" after the last "newline-formfeed".
(add-to-list 'safe-local-eval-forms '(org-eval-emacs-lisp-setup-blocks))
(add-to-list 'safe-local-eval-forms '(org-eval-python-setup-blocks)))Easy LaTeX preamble editing
There are at least two ways (new and old) to edit the LateX preamble
latex_header and latex-extra_header export options easily in LaTeX source or
export blocks. This Org (info) file uses the new way, but keeps the old way for
backwards compatibility.
The new way – exploiting an idea of Omar Antolin Camarena – is to code new <LANGUAGE>-modes allowing to edit in LaTeX mode and to export to LaTeX code with correct LaTeX preamble export setting prefixes. Here, are links to three posts exposing his idea:
- Export LaTeX macros to LaTeX and HTML/MathJax preambles (reddit),
- Export JavaScript source blocks to script tags in HTML (reddit),
- Export JavaScript source blocks to script tags in HTML (SX).
Listing lst:org-babel-latex-header-blocks implements this way by means of two
new <LANGUAGE>-modes: latex-header and latex-extra-header.
(with-eval-after-load 'emacs
(defun prefix-all-lines (prefix body)
(with-temp-buffer
(insert body)
(string-insert-rectangle (point-min) (point-max) prefix)
(buffer-string)))
(defun org-babel-execute:latex-extra-header (body _params)
"Execute a block of LaTeX extra header lines with org-babel.
This function is called by `org-babel-execute-src-block' and
prefixes all lines with \"#+latex_extra_header: \"."
(prefix-all-lines "#+latex_extra_header: " body))
(defun org-babel-execute:latex-header (body _params)
"Execute a block of LaTeX header lines with org-babel.
This function is called by `org-babel-execute-src-block' and
prefixes all lines with \"#+latex_header: \"."
(prefix-all-lines "#+latex_header: " body))
(defvar org-babel-default-header-args:latex-extra-header
'((:exports . "results") (:results . "raw")))
(defvar org-babel-default-header-args:latex-header
'((:exports . "results") (:results . "raw")))
(with-eval-after-load 'org-src
(setopt org-src-window-setup 'current-window)
(add-to-list 'org-src-lang-modes '("toml" . conf-toml))
(add-to-list 'org-src-lang-modes '("latex-header" . latex))
(add-to-list 'org-src-lang-modes '("latex-extra-header" . latex))))
The old way is to use a special export attribute as in the function
org-latex-header-blocks-filter in ox-extra.el. Apparently, nobody is using
this broken function (broken, since it relies on support only in org-mode before
2014-11-11). Listing lst:org-latex-header-blocks-filter proposes a fix for
org-latex-header-blocks-filter.
(with-eval-after-load 'ox
(defun org-latex-header-blocks-filter (backend)
"Convert marked LaTeX export blocks to \"#+latex_header: \" lines.
The marker is a line \"#+header: :header yes\" preceding the block.
For instance, the LaTeX export block
,#+header: :header yes
,#+begin_export latex
% This line converts to a LaTeX header line.
,#+end_export
converts to
\"#+latex_header: % This line converts to a LaTeX header line.\"."
(when (org-export-derived-backend-p backend 'latex)
(let ((blocks
(org-element-map
(org-element-parse-buffer 'greater-element nil) 'export-block
(lambda (block)
(let ((type (org-element-property :type block))
(header (org-export-read-attribute :header block :header)))
(when (and (string= type "LATEX") (string= header "yes"))
block))))))
(mapc (lambda (block)
;; Set point to where to insert LaTeX header lines
;; after deleting the block.
(goto-char (org-element-property :post-affiliated block))
(let ((lines
(split-string (org-element-property :value block) "\n")))
(delete-region (org-element-property :begin block)
(org-element-property :end block))
(dolist (line lines)
(insert (concat "#+latex_header: "
(replace-regexp-in-string "\\` *" "" line)
"\n")))))
;; Reverse to go upwards to avoid wrecking the list of
;; block positions in the file that would occur in case
;; of going downwards.
(reverse blocks)))))
;; Push the filter on the hook.
(cl-pushnew #'org-latex-header-blocks-filter
org-export-before-parsing-hook))This file uses the new way, while keeping the old way for backwards compatibility, because the new way feels less hackish than the old way. A practical difference is that new way source blocks (contrary to old way export blocks) do not work in #+SETUPFILE: <FILE>, but only in #+INCLUDE: <FILE> files.
Org-mode macro utilities
Listing lst:by-backend-kbd-org-macro defines the Emacs Lisp utilities to
define the Org mode kbd macro in listing
lst:source-file-export-keyword-settings.
(with-eval-after-load 'emacs
(when (ensure-package-installation 'htmlize)
(autoload 'htmlize-protect-string "htmlize" nil t))
;; https://orgmode.org/worg/org-contrib/babel/languages/ob-doc-LaTeX.html
(defmacro by-backend (&rest body)
"Help for org-export backend dependent execution."
`(cl-case ',(bound-and-true-p org-export-current-backend) ,@body))
(defun by-backend-kbd-org-macro (keys)
"Help for an org-export backend dependent \"#+macro: kbd\"."
(by-backend
(html (format "@@html:<kbd>%s</kbd>@@" (htmlize-protect-string keys)))
(latex (format "@@latex:\\colorbox{PowderBlue}{\\texttt{%s}}@@" keys)))))File inclusion (info) and Noweb (info) trickery
Note: How to include LaTeX packages in a LaTeX export block.
Listing lst:source-file-export-keyword-settings shows the preamble lines of this
/gav451/emacs.d/src/commit/1263846aa2bcba04541969038d762de77ce5656f/README.org file. It lists the export keyword settings, the definition of
the Org mode kbd macro and the source block that generates part of the LaTeX
preamble. Listing lst:latex-header-1, lst:latex-header-2, lst:latex-header-3,
lst:latex-header-4, and lst:latex-header-5 show the LaTeX source blocks that
generate the LaTeX preamble. All listings in this section exists thanks to file
inclusion (info) and noweb (info) trickery.
<<latex-header-1>><<latex-header-2>><<latex-header-3>><<latex-header-4>><<latex-header-5>>Advanced LaTeX export settings
Listing lst:ox-latex-emacs-lisp-setup initializes the buffer local variables
org-latex-classes, org-latex-title-command, org-latex-toc-command, and
org-latex-subtitle-format. Listing /gav451/emacs.d/src/commit/1263846aa2bcba04541969038d762de77ce5656f/lst/title-page is a template to initialize
org-latex-title-command. Type
(eval
,(eval
}},(eval
, and(eval
to read how those variables control exporting from Org-mode to LaTeX.(when (require 'ox-latex nil 'noerror)
;; https://emacs.stackexchange.com/questions/47347/
;; customizing-org-latex-title-command-to-edit-title-page
(make-variable-buffer-local 'org-latex-classes)
(cl-pushnew '("article-local"
"\\documentclass[11pt]{article}
[NO-DEFAULT-PACKAGES]
[PACKAGES]
[EXTRA]"
("\\section{%s}" . "\\section*{%s}")
("\\subsection{%s}" . "\\subsection*{%s}")
("\\subsubsection{%s}" . "\\subsubsection*{%s}")
("\\paragraph{%s}" . "\\paragraph*{%s}")
("\\subparagraph{%s}" . "\\subparagraph*{%s}"))
org-latex-classes :key #'car :test #'equal)
(make-variable-buffer-local 'org-latex-title-command)
(setq org-latex-title-command (concat title-page))
(make-variable-buffer-local 'org-latex-toc-command)
(setq org-latex-toc-command "
\\tableofcontents\\label{toc}
\\listoflistings
\\listoftables
\\newpage
")
(make-variable-buffer-local 'org-latex-subtitle-format)
(setq org-latex-subtitle-format ""))\begin{titlepage}
%% https://tex.stackexchange.com/questions/506102/
%% adding-header-and-footer-to-custom-titlepage
\thispagestyle{titlepage}
\begin{center}
%% Title
\begin{Huge}
{\bf %t} \\
\vspace{1em}
\end{Huge}
%% Author
\begin{Large}
{\bf %a} \\
\vspace{1em}
\end{Large}
\end{center}
\end{titlepage}Org Syntax
Two tools to grok how Org mode parsing works are the Org Syntax specification and the Org mode parser tutorial. The Org element parsing API boils down to three functions:
- The function
org-element-parse-bufferimplements a fully recursive buffer parser that returns an abstract syntax tree. - The functions
org-element-at-pointandorg-element-contextreturn information on the document structure around point either at the element level or at the object level in case oforg-element-context.
Listing lst:grok-org-element-tree improves the Org mode parser tutorial by
defining interactive wrappers that pretty print the results of those
non-interactive org-element functions to an Emacs-lisp buffer.
(with-eval-after-load 'org-element
(when (require 'pp nil 'noerror)
(defconst grok-org-output
"*Grok Org Element Output*"
"Grok Org output buffer name.")
(defun grok-org-element-at-point ()
(interactive)
(pp-display-expression
(org-element-at-point) grok-org-output))
(defun grok-org-element-context ()
(interactive)
(pp-display-expression
(org-element-context) grok-org-output))
(defun grok-org-element-parse-buffer ()
(interactive)
(let ((what (completing-read
"granularity: "
'(headline element greater-element object)
nil 'require-match)))
(pp-display-expression
(org-element-parse-buffer what) grok-org-output)))
(defun grok-org-heading-components ()
(interactive)
(pp-display-expression
(org-heading-components) grok-org-output))))Grammar, spelling, and style tools
Abbrevs (info)
Mickey Peterson has posted Correcting Typos and Misspellings with Abbrev showing
how to use Keyboard Macros (info) to exploit Wikipedia's list of common
misspellings for machines. Listing lst:misspellings-abbrev defines his
keyboard macro under the name misspellings-abrev. I have used those
directions to define src_emacs-lisp{global-abbrev-table} and to store it in
src_emacs-lisp{abbrev-file-name} for git management. I can change the
abbreviation definitions in this file by means of:
- Execute src_emacs-lisp{(edit-abbrevs)} to alter abbreviation definitions by
editing an
*Abbrevs*buffer. - Add, edit, or remove definitions of the form
"source" 1 "target"under the global or a mode-specific table. - Execute src_emacs-lisp{(abbrev-edit-save-buffer)} to save all user abbreviation definitions in the current buffer.
(with-eval-after-load 'emacs
(defun browse-common-misspellings ()
"Open the Wikipedia page of common misspellings for machines in EWW."
(interactive)
(eww (concat "https://en.wikipedia.org/wiki/Wikipedia"
":Lists_of_common_misspellings/For_machines")))
(fset 'misspellings-abbrev
(kmacro-lambda-form
[?\C-s ?- ?> return backspace backspace ?\C-k ?\C-x ?a ?i ?g ?\C-y return]
0 "%d"))
(setq-default abbrev-mode t))
Listing lst:word-games defines the anagram-p function that migth be used games.
;; https://funcall.blogspot.com/2022/07/lets-play-wordle.html
;; https://github.com/tabatkins/wordle-list
(defun anagram-p (evil vile)
"Check whether strings EVIL and VILE are anagrams of each other."
(if (string= evil vile)
nil
(string= (cl-sort evil #'<) (cl-sort vile #'<))))
;; https://funcall.blogspot.com/2020/01/palindromes-redux-and-sufficiently.html
;; https://irreal.org/blog/?p=8570
(defun palindrome-p (word)
"Check whether the string WORD is a palindrome."
(cl-do ((head 0 (1+ head))
(tail (1- (length word)) (1- tail))
(ok t))
((or (not ok) (>= head tail) ok)
(setq ok (= (aref word head) (aref word tail))))))DICT.org
Evaluating src_emacs-lisp{(dictionary)} connects to a local or remote dictd
server. The following links explain how to configure and use dictd:
I am using the following Debian Bullseye dictionaries on Darwin and Gentoo:
- dict-devil_1.0-13.1_all.deb
- dict-foldoc_20201018-1_all.deb
- dict-gcide_0.48.5+nmu1_all.deb
- dict-jargon_4.4.7-3.1_all.deb
- dict-vera_1.24-1_all.deb
- dict-wn_3.0-36_all.deb
# https://jpmens.net/2020/03/08/looking-up-words-with-dict/
server 127.0.0.1 {
port 2628
}
# Local Variables:
# mode: conf-unix
# End:cat > ~/.dictd.conf <<EOF
# https://www.masteringemacs.org/article/wordsmithing-in-emacs
database devil {
data "${HOME}/.local/share/dictd/devil.dict.dz"
index "${HOME}/.local/share/dictd/devil.index"
}
database foldoc {
data "${HOME}/.local/share/dictd/foldoc.dict.dz"
index "${HOME}/.local/share/dictd/foldoc.index"
}
database gcide {
data "${HOME}/.local/share/dictd/gcide.dict.dz"
index "${HOME}/.local/share/dictd/gcide.index"
}
database jargon {
data "${HOME}/.local/share/dictd/jargon.dict.dz"
index "${HOME}/.local/share/dictd/jargon.index"
}
database vera {
data "${HOME}/.local/share/dictd/vera.dict.dz"
index "${HOME}/.local/share/dictd/vera.index"
}
database wn {
data "${HOME}/.local/share/dictd/wn.dict.dz"
index "${HOME}/.local/share/dictd/wn.index"
}
EOF# https://jpmens.net/2020/03/08/looking-up-words-with-dict/
/usr/local/sbin/dictd \
--config .dictd.conf \
--verbose \
--logfile .dictd.log \
-d nodetachWritegood mode
Writegood mode is a minor mode to aid in finding common writing problems. The post Matt Might's "My Ph.D. advisor rewrote himself in bash" scripts inspired this mode. Listing lst:configure-writegood-mode configures writegood mode.
(when (and (ensure-package-installation 'writegood-mode)
(fboundp 'writegood-mode))
(global-set-key (kbd "C-c g") #'writegood-mode))Programming Tools
Eglot (info)
Emacs polyGLOT (Eglot) is an Emacs language-server-protocol client that stays out of your way. Eglot (info) is a builtin since Emacs-29.0.60. The following listings contribute to a programming language mode independent Eglot configuration:
- Listing minimal Eglot setup ensures installation of Eglot, shows how to get
debug information from the Python LSP server, and adds key bindings to
eglot-mode-keymap. - Listing lst:help-setup-org-src-mode-for-eglot and
lst:setup-python-org-src-mode-for-eglot try to prepare any
org-src-modebuffers for use with Eglot. They are a refactored implementation of the post Using rustic, eglot, and org-babel with LSP support in Emacs for my use with Python. - Listing lst:narrow-format-all-python defines a function to format only the
narrowed region of Python
org-src-modeblocks prepared by means of the code in listing lst:setup-python-org-src-mode-for-eglot. Do not useformat-all-bufferon such buffers, sinceformat-all-bufferdoes not handle the narrowing. - Listing lst:eglot-maybe-ensure starts Eglot in case of proper programming modes and proper directory local variables (meaning in presence of a proper file .dir-locals.el in the root directory of any project using proper programming modes).
(with-eval-after-load 'emacs
;; Replace `nil' with `t' for debugging.
(when nil
(when (require 'eglot nil t)
(setq eglot-server-programs
`(((python-ts-mod python-mode)
. ,(eglot-alternatives
'(("pylsp" "-vv")
("ruff-lsp")))))))))
(with-eval-after-load 'eglot
(define-key eglot-mode-map (kbd "C-c n") 'flymake-goto-next-error)
(define-key eglot-mode-map (kbd "C-c p") 'flymake-goto-prev-error)
(define-key eglot-mode-map (kbd "C-c r") 'eglot-rename))(with-eval-after-load 'emacs
(defcustom eglot-maybe-ensure-modes '(python-mode)
"Modes where maybe `eglot-ensure' should be or has been called.
This may be in the case of proper directory local variables or in
the case of proper `org-src-mode' buffers.")
;; https://www.reddit.com/r/emacs/comments/w4f4u3
;; /using_rustic_eglot_and_orgbabel_for_literate/
(defun eglot-org-babel-edit-prep (info)
"Try to setup an `org-mode-src' buffer to make `eglot-ensure' succeed.
INFO has a form similar to the return value of
`org-babel-get-src-block-info'. Try to load the tangled file
into the `org-src-mode' buffer as well as to narrow the region to
the Org-mode source block code before calling `eglot-ensure'."
(unless (bound-and-true-p org-src-mode)
(user-error "Buffer %s is no `org-src-mode' buffer" (buffer-name)))
(let ((mark (point))
(body (nth 1 info))
(filename (cdr (assq :tangle (nth 2 info)))))
(when (string= filename "no")
(user-error "Org source block has no tangled file"))
(setq filename (expand-file-name filename))
(unless (file-readable-p filename)
(user-error "Tangled file %s is not readable" filename))
(with-temp-buffer
(insert-file-contents filename 'visit nil nil 'replace)
(unless (search-forward body nil 'noerror)
(user-error "Org source block does not occur in tangled file %s"
filename))
(when (search-forward body nil 'noerror)
(user-error "Org source block occurs twice or more in tangled file %s"
filename)))
(goto-char (point-min))
(insert-file-contents filename 'visit nil nil 'replace)
(let ((max-point (search-forward body))
(min-point (search-backward body)))
(narrow-to-region min-point max-point))
(goto-char mark)
(eglot-ensure))))(with-eval-after-load 'emacs
;; https://www.reddit.com/r/emacs/comments/w4f4u3
;; /using_rustic_eglot_and_orgbabel_for_literate/
(defun undo-eglot-org-babel-edit-prep()
"Undo the `eglot' setup by deleting the text hidden by narrowing.
This is to advice `org-edit-src-exit' and `org-edit-src-save'."
(when (and (bound-and-true-p org-src-mode)
(buffer-file-name)
(apply #'derived-mode-p eglot-maybe-ensure-modes))
(save-excursion
(goto-char (point-min))
(save-restriction
(widen)
(delete-region (point-min) (point)))
(goto-char (point-max))
(save-restriction
(widen)
(delete-region (point) (point-max))))))
(defun org-babel-edit-prep:python (info)
(eglot-org-babel-edit-prep info))
(advice-add 'org-edit-src-exit :before #'undo-eglot-org-babel-edit-prep)
(advice-add 'org-edit-src-save :before #'undo-eglot-org-babel-edit-prep))#+caption[Experimental =narrow-format-all:python=]:
(when (fboundp 'format-all-buffer)
(defun narrow-format-all:python ()
"Format narrowed Python `org-src-mode' buffers correctly.
Use this function instead of `format-all-buffer' on `org-babel-edit-prep:python'
prepared buffers."
(interactive)
(when (eq major-mode 'python-mode)
(let ((source-min (point-min))
(source-max (point-max))
(source (current-buffer))
(target (get-buffer-create "*narrow-format-all:python*")))
(with-current-buffer target
(barf-if-buffer-read-only)
(erase-buffer)
(save-excursion
(insert-buffer-substring-no-properties
source source-min source-max))
(python-mode)
(setq-local format-all-formatters '(("Python" black)))
(format-all-buffer)
(let ((target-min (point-min))
(target-max (point-max)))
(with-current-buffer source
(erase-buffer)
(save-excursion
(insert-buffer-substring-no-properties
target target-min target-max)))))))))(with-eval-after-load 'emacs
(defun eglot-maybe-ensure ()
(when (and (apply #'derived-mode-p eglot-maybe-ensure-modes)
(assoc 'eglot-workspace-configuration dir-local-variables-alist))
(eglot-ensure)))
;; The two hooks `after-change-major-mode-hook' and
;; `hack-local-variables-hook' are OK, but language mode hooks like
;; `python-mode-hook' are not.
(add-hook 'after-change-major-mode-hook #'eglot-maybe-ensure))Format-all
Listing lst:configure-format-all:
- Configures format-all which is a package that provides an universal interface to code formatters of more than 60 computer languages.
- Adds
format-all-org-babel-post-tangletoorg-babel-post-tangle-hookto format tangled Python code.
;; https://github.com/lassik/emacs-format-all-the-code#readme
;; https://ianyepan.github.io/posts/format-all/
;; https://jamesaimonetti.com/posts/formatting-tangled-output-in-org-mode/
(when (ensure-package-installation 'format-all)
;; (with-eval-after-load 'prog-mode
;; (when (autoload 'format-all-ensure-formatter "format-all")
;; (add-hook 'prog-mode-hook #'format-all-ensure-formatter)))
(with-eval-after-load 'ob-tangle
(add-hook
'org-babel-post-tangle-hook
(defun format-all-org-babel-post-tangle ()
(when (derived-mode-p 'python-mode)
(setq-local format-all-formatters '(("Python" black)))
(format-all-buffer)
(save-buffer)
(message "Saved reformatted tangled buffer `%s'"
(buffer-file-name)))))))Flymake (info)
Flymake is an universal on-the-fly syntax checker for Emacs. It is a requirement of eglot, but you can use it without eglot for instance in python-mode buffers that do not visit a file.
Programming Modes
Common Lisp programming
Listing lst:configure-sly configures the Sly (info) Common Lisp IDE for Emacs for use with Steel Bank Common Lisp (sbcl):
- It configures
sly-default-lispandsly-lisp-implementationsas in theslydocumentation string instead of in the multiple lisps (info) manual. - It ensures the automatic connection to the lisp server (info) when opening a Common Lisp file.
- It configures searching documentation in the Common Lisp HyperSpec according to the basic customization (info) manual.
Finally, listing lst:configure-sly uses a technique to load Slynk faster (info) by means of a custom core file in src_emacs-lisp{no-littering-var-directory}. Listing lst:sbcl-core-for-sly tangles to a script to dump such a SBCL core.
(when (ensure-package-installation 'sly)
(with-eval-after-load 'sly
;; Set `sly-default-lisp' instead of `inferior-lisp-program',
;; because `sly' uses `inferior-lisp-program' only as a backwards
;; compatibility fallback option.
;; The warning "Value ‘sbcl’ does not match type function" is due to
;; the buggy `defcustom' type of `sbcl-default-lisp' in `sly.el'.
(setopt sly-default-lisp 'sbcl
sly-lisp-implementations
`((sbcl (,(executable-find "sbcl")
"--core"
,(no-littering-expand-var-file-name "sbcl.core-for-sly")))))
(add-hook 'sly-mode-hook
(defun on-sly-mode-hook ()
(unless (sly-connected-p)
(save-excursion (sly)))))
(cond
((eq system-type 'darwin)
(setq common-lisp-hyperspec-root
"file:///usr/local/share/doc/hyperspec/HyperSpec/")
(setq common-lisp-hyperspec-symbol-table
(concat common-lisp-hyperspec-root "Data/Map_Sym.txt")))
((eq system-type 'gnu/linux)
(setq common-lisp-hyperspec-root
"file:///usr/share/doc/hyperspec-7.0/HyperSpec/"))
(t (message "Default Common Lisp HyperSpec access")))
(define-key sly-prefix-map (kbd "M-h") #'sly-documentation-lookup)))#!/bin/sh
sbcl <<EOF
(mapc 'require '(sb-bsd-sockets sb-posix sb-introspect sb-cltl2 asdf))
(save-lisp-and-die "sbcl.core-for-sly")
EOF
# Local Variables:
# mode: shell-script
# sh-indentation: 2
# sh-basic-offset: 2
# End:CS 325 AI Programming
The CS 325 AI Programming course allows to learn Common Lisp by self-study and the page CS 325: Setting up Lisp gives instructions how to:
Quicklisp
Quicklisp is a library manager for Common Lisp. Listing lst:download+verify-quicklisp downloads the Quicklisp file and verifies its signature to prevent tampering. Listing lst:bootstrap-quicklisp tangles to a shell script allowing to bootstrap Quicklisp with SBCL. Listing lst:quicklisp-sbclrc-file tangles to the a SBCL resource file with Quicklisp support.
curl -sS -O https://beta.quicklisp.org/quicklisp.lisp
curl -sS -O https://beta.quicklisp.org/quicklisp.lisp.asc
curl -sS -O https://beta.quicklisp.org/release-key.txt
gpg --import release-key.txt
gpg --verify quicklisp.lisp.asc quicklisp.lisp#!/bin/sh
sbcl --load ~/quicklisp.lisp <<EOF
(quicklisp-quickstart:install)
(quit)
EOF
# Local Variables:
# mode: shell-script
# sh-indentation: 2
# sh-basic-offset: 2
# End:;;; Hey Emacs, this is my -*- lisp -*- .sbclrc file.
#-quicklisp
(let ((quicklisp-init (merge-pathnames "quicklisp/setup.lisp"
(user-homedir-pathname))))
(when (probe-file quicklisp-init)
(load quicklisp-init)))Emacs Lisp Programming (info)
Here is a list of links describing how to program and debug Emacs Lisp (info) code:
- Evaluating Elisp in Emacs
- Debugging Elisp Part 1: Earn your independence
- Debugging Elisp Part 2: Advanced topics
- Xah talk show: Elisp coding: xah-add-space-after-comma
- Xah talk show: Elisp coding: narrow-to-region, sort-lines, hilight-unicode
Ref. [cite:@Monnier.ACM-PL.4.1] exposes the evolution of Emacs Lisp and explains many Emacs Lisp idioms.
Listing setup ielm configures the Interactive Emacs Lisp Mode for better interoperability with Smartparens: get help on the key bindings by means of src_emacs-lisp{(describe-function 'inferior-emacs-lisp-mode)}.
(with-eval-after-load 'ielm
(setopt ielm-dynamic-return nil))Fennel Programming
Here is a list of links describing how to install and setup Fennel and how to install and use ob-fennel with the LÖVE 2D game engine:
- The Fennel Programming Language
- Setting up Fennel
- Org Babel support for the Fennel language: ob-fennel
- Reproducible Research with Org Mode, Fennel, and LÖVE
(when (and (executable-find "fennel")
(ensure-package-installation 'fennel-mode))
(unless (package-installed-p 'ob-fennel)
(package-vc-install "https://gitlab.com/andreyorst/ob-fennel"))
(when (package-installed-p 'ob-fennel)
(ensure-package-installation 'ob-fennel)
(set-org-babel-language-activity 'fennel (fboundp 'fennel-mode))))(+ x y)luarocks \
install --local readline \
HISTORY_INCDIR=/usr/local/opt/readline/include \
HISTORY_DIR=/usr/local/opt/readline/libLua Programming
(when (and (executable-find "lua")
(ensure-package-installation 'company-lua 'lua-mode)))return (x+y)Maxima Programming (info)
Listing lst:configure-maxima configures Maxima Mode. The following list contains more information:
- Maxima Mode is an Emacs interface to the computer algebra system Maxima.
- Maxima Source Code Blocks in Org Mode shows how to use Maxima in Org Mode.
- Maxima By Example is a tutorial for Maxima.
Listing lst:maxima-example is a minimal example of how to use how to use Maxima in Org Mode.
(when (ensure-package-installation 'maxima 'company-maxima)
(add-hook 'maxima-mode-hook #'maxima-hook-function)
(add-hook 'maxima-inferior-mode-hook #'maxima-hook-function)
(add-to-list 'auto-mode-alist
(cons "\\.mac\\'" 'maxima-mode))
(add-to-list 'interpreter-mode-alist
(cons "maxima" 'maxima-mode)))print(1+1);Python programming
The Python Programming in Emacs wiki page lists options to enhance Emacs's
built-in python-mode. Here, the focus is on two Emacs packages and four Python
packages:
- Eglot - Emacs polyGLOT: a builtin LSP client since Emacs-29.0.60. The maintainer also contributes to Emacs itself and has a deep understanding of the Way of Emacs. He refuses to add new features without seeing how they fit into the Way of Emacs as this discussion on org-mode source code blocks shows.
- Jedi is a static analysis tool for Python that is typically used in plugins for editors or integrated development environments. Jedi has a focus on autocompletion and object definition lookup functionality.
- Ruff is an extremely fast Python linter and a replacement for Flake8 with a variety of its plugins. Charlie Marsh explains why he started Ruff in the post Python tooling could be much faster.
- Python LSP Server is in my opinion the most complete Language Server Protocol implementation for Python and it handles Ruff thanks to the python-lsp-ruff plugin.
- Code-cells allows to edit IPython or Jupyter notebooks in Emacs with help from either Jupytext or Pandoc.
Here are links covering how to integrate Emacs, Python and a Python LSP server, before plunging into the configuration steps:
- Building Your Own Emacs IDE with LSP
- Doom Emacs and Language Servers
- Eglot based Emacs Python IDE
- Getting started with lsp-mode for Python
- Python & Emacs, Take 3
- Python with Emacs: py(v)env and lsp-mode
Python-mode
Listing setup Python mode and choose common Python interpreter select a common
Python interpreter in a virtual environment for use in python-mode and
ob-python by means of src_emacs-lisp{(choose-common-python-interpreter)}. The
pythonic, pyvenv, and pyvenv packages allow to handle Python virtual
environments within Emacs. The pyenv package provides support to work with
pyenv (eventually with pyenv-virtualenv) to select between different python
versions (eventually each with different environments). In the end, all those
packages do is to set python-shell-virtualenv-root (in case of pyenv and
pythonic) or tweak the environment variables and restart the relevant Python
child processes (in case of pyvenv). Therefore, I replace those packages with
listing access pyenv and select a Python interpreter in a virtual environment to
set python-shell-virtualenv-root from within Emacs.
Listing setup Python mode and choose common Python linter select a common Python
linter for the python-check-command and the python-flymake-command by means
of src_emacs-lisp{(choose-common-python-linter)} from:
- Pyflakes - simple tool which checks Python source files for errors.
- Flake8 - your tool for style guide enforcement.
- Ruff - an extremely fast Python linter written in Rust.
Listing kickoff pyproject.toml proposal facilitates dropping a pyproject.toml file into Python projects which anyhow should switch to using a pyproject.toml file as explained in the post This Way Up: A Bottom-Up Look At Python Packaging. The packaging Python projects tutorial and the Python sample project walk you through the process of writing a pyproject.toml file. Ruff docstring setup explains how to setup documentation string checking in the pyproject.toml file.
Listing kickoff setup.cfg proposal implements the using black with other tools rules which make flake8 or pycodestyle agree with black's uncompromising style.
Finally, listing flake8-nocolor and ruff-nocolor pipe the stdout output of the
flake8 and ruff executables through cat to remove escape sequences.
(defun choose-common-python-interpreter (&optional interpreter)
"Let `ob-python' and `python-mode' use the same Python INTERPRETER."
(interactive)
(unless (featurep 'ob-python)
(set-org-babel-language-activity 'python (fboundp 'python-mode)))
(let* ((prompt (format "Choose Python (%s): "
(bound-and-true-p python-shell-interpreter)))
(choices '(ipython python))
(choice (if (member interpreter choices)
(symbol-name interpreter)
(completing-read prompt choices nil t))))
(when (boundp 'org-babel-python-command)
(pcase choice
("python"
(setopt org-babel-python-command
(concat (or (executable-find "python3")
(executable-find "python"))
" -E")))
("ipython"
(setopt org-babel-python-command
(concat (or (executable-find "ipython3")
(executable-find "ipython"))
" --simple-prompt --HistoryAccessor.enabled=False"))))
(message "Now `org-babel-python-command' equals %S"
org-babel-python-command))
(when (boundp 'python-shell-interpreter)
(pcase choice
("python"
(setopt python-shell-interpreter (or (executable-find "python3")
(executable-find "python"))
python-shell-interpreter-args "-E -i"))
("ipython"
(setopt python-shell-interpreter (or (executable-find "ipython3")
(executable-find "ipython"))
python-shell-interpreter-args
"--simple-prompt --HistoryAccessor.enabled=False")))
(message "Now `python-shell-interpreter' equals %S"
python-shell-interpreter))))(defun choose-common-python-linter (&optional linter)
"Let `python-check-command' and `python-flymake-command' use the same LINTER."
(interactive)
(let* ((prompt (format "Choose Python checker (%s): "
(bound-and-true-p python-check-command)))
(choices '(flake8-nocolor pyflakes ruff-nocolor))
(choice (if (member linter choices)
(symbol-name linter)
(completing-read prompt choices nil t))))
(when (and (boundp 'python-check-command) (boundp 'python-flymake-command))
(pcase choice
("flake8-nocolor"
(setopt python-check-command (executable-find choice)
python-flymake-command (list (executable-find choice) "-")))
("pyflakes"
(setopt python-check-command (executable-find choice)
python-flymake-command `(,(executable-find choice))))
("ruff-nocolor"
(setopt python-check-command (executable-find choice)
python-flymake-command (list (executable-find choice)
"--stdin-filename" "stdin" "-"))))
(when (bound-and-true-p python-check-custom-command)
(setq python-check-custom-command nil))
(message "Python checker commands are %S and %S"
python-check-command python-flymake-command))))(with-eval-after-load 'python
(setopt python-indent-guess-indent-offset nil
python-shell-completion-native-disabled-interpreters '("ipython3"
"pypy"))
(choose-common-python-interpreter 'python)
(choose-common-python-linter 'ruff-nocolor))(when (executable-find "pyenv")
(defun pyenv-full-path (version)
"Return the full path for VERSION."
(unless (string= version "system")
(concat (pyenv-root) (file-name-as-directory "versions") version)))
(defun pyenv-root ()
"Return \"pyenv root\" as a directory."
(cl-destructuring-bind (exit-code output)
(shell-command-with-exit-code "pyenv" "root")
(if (= 0 exit-code)
(file-name-as-directory (string-trim output))
(error "%s" (string-trim output)))))
(defun pyenv-version-name ()
"Return \"pyenv version-name\"."
(cl-destructuring-bind (exit-code output)
(shell-command-with-exit-code "pyenv" "version-name")
(if (= 0 exit-code)
(string-trim output)
(error "%s" (string-trim output)))))
(defun pyenv-versions ()
"Return \"pyenv versions --bare --skip-aliases\" as a list.
Complete the result with \"system\"."
(cl-destructuring-bind (exit-code output)
(shell-command-with-exit-code
"pyenv" "versions" "--bare" "--skip-aliases")
(if (= 0 exit-code)
(cons "system" (split-string output))
(error "%s" (string-trim output)))))
(defun pyenv-virtualenvs ()
"Return \"pyenv virtualenvs --bare --skip-aliases\" as a list."
(cl-destructuring-bind (exit-code output)
(shell-command-with-exit-code
"pyenv" "virtualenvs" "--bare" "--skip-aliases")
(if (= 0 exit-code)
(split-string output)
(error "%s" (string-trim output))))))(with-eval-after-load 'python
(when (cl-every #'fboundp '(pyenv-full-path
pyenv-version-name
pyenv-versions
pyenv-virtualenvs))
(setq python-shell-virtualenv-root
(pyenv-full-path (or (pyenv-version-name)
(car (pyenv-virtualenvs))
(car (pyenv-versions)))))
(message "Now `python-shell-virtualenv-root' equals %S"
python-shell-virtualenv-root)
(defun set-python-shell-virtualenv-root-to-pyenv-version ()
"Set `python-shell-virtual-env-root' to a pyenv version."
(interactive)
(let* ((version-name (pyenv-version-name))
(prompt (format "pyenv version (%s): " version-name))
(choices (pyenv-versions))
(version (completing-read prompt choices nil 'require-match)))
(unless (string= version-name version)
(setq python-shell-virtualenv-root (pyenv-full-path version))
(setenv "PYENV_VERSION" version))
(message "Now `python-shell-virtualenv-root' equals %S"
python-shell-virtualenv-root)))
(defun set-python-shell-virtualenv-root-to-pyenv-virtualenv ()
"Set `python-shell-virtual-env-root' to a pyenv virtualenv."
(interactive)
(let* ((version-name (pyenv-version-name))
(prompt (format "pyenv virtualenv (%s): " version-name))
(choices (pyenv-virtualenvs))
(version (completing-read prompt choices nil 'require-match)))
(unless (string= version-name version)
(setq python-shell-virtualenv-root (pyenv-full-path version))
(setenv "PYENV_VERSION" version))
(message "Now `python-shell-virtualenv-root' equals %S"
python-shell-virtualenv-root)))))# Use for instance "hatch new" to create or initialize a project.
# See: https://pypi.org/project/hatch
[tool.black]
line-length = 88
[tool.ruff]
line-length = 88
select = [
"ARG", # flake8-unused-arguments
"B", # flake8-bugbear
"C", # mccabe
"C4", # flake8-comprehensions
"E", # pycodestyle
"D", # pydocstyle
"F", # pyflakes
"UP", # pyupgrade
"W", # pycodestyle
]
ignore = [
"B905", # `zip()` without an explicit `strict=` parameter
# https://www.pydocstyle.org/en/stable/error_codes.html#default-conventions
# pydocstyle numpy convention:
# "D107", # missing docstring in __init__
# "D203", # single blank line required before class docstring
# "D212", # multi-line docstring summary should start at the first line
# "D213", # multi-line docstring summary should start at the second line
# "D402", # first line should not be the function signature
# "D413", # missing blank line after last section
# "D415", # 1st line should end with a ".", "?", or "?"
# "D416", # section name should end with a ":"
# "D417", # missing argument descriptions in the docstring
]
[tool.ruff.mccabe]
max-complexity = 15
[tool.ruff.pydocstyle]
convention = "numpy"
# Local Variables:
# mode: conf-toml-mode
# End:[flake8]
docstring-convention = numpy
extend-select = B,F,W
extend-ignore = W503
max-complexity = 15
max-line-length = 88
[pycodestyle]
ignore = W503
max-line-length = 88
# Local Variables:
# mode: conf-toml
# End:#!/bin/sh
flake8 "$@" | cat
# Local Variables:
# mode: shell-script
# sh-indentation: 2
# sh-basic-offset: 2
# End:#!/bin/sh
ruff "$@" | cat
# Local Variables:
# mode: shell-script
# sh-indentation: 2
# sh-basic-offset: 2
# End:Eglot for python-mode
Listing lst:configure-eglot+pylsp-ruff configures eglot for Python using the python-lsp-server with the pylsp-ruff plugin for the easiest way to let python-lsp-server use Ruff. The latest python-lsp-server documentation tells to configure it for flake8 as in listing lst:configure-eglot+pylsp+flake8. In order to enable all builtin python-lsp-server capabilities, ensure installation of the Python packages autopep8, flake8, pydocstyle, pylint, python-lsp-server, rope, and yapf. This method is under investigation (it feels flaky since it shows some error messages twice).
Listing lst:eglot-directory-variables-for-python shows a proper .dir-locals.el file in the root directory of any Python project to start eglot automatically according to the configuration in listing lst:eglot-maybe-ensure. Type
(eval
to dump aJSON
representation of src_emacs-lisp{eglot-workspace-configuration} for debugging.
The comment in listing minimal Eglot setup also shows how to decrease
or to increase the verbosity of Python LSP server log output for debugging.
(with-eval-after-load 'eglot
(setq-default
eglot-workspace-configuration
;; Enable the `:pylsp_ruff' plugin and ensure to disable the
;; `:flake8', `:mccabe', and `:pycodestye' plugins.
'(:pylsp (:plugins
(:pylsp_ruff
(:enabled t)
:flake8
(:enabled :json-false)
:mccabe
(:enabled :json-false)
:pycodestyle
(:enabled :json-false)
:jedi
(:auto_import_modules ["numpy"])
:jedi_completion
(:cache_for ["astropy"]))))))(with-eval-after-load 'eglot
(setq-default
eglot-workspace-configuration
;; How to use flake8 instead of pycodestyle or ruff, see:
;; https://github.com/python-lsp/python-lsp-server#configuration
'(:pylsp (:configurationSources
["flake8"]
:plugins
(:flake8
(:enabled t)
:mccabe
(:enabled :json-false)
:pycodestyle
(:enabled :json-false)
:pyflakes
(:enabled :json-false)
:pylsp-ruff
(:enabled :json-false)
:jedi
(:auto_import_modules ["numpy"])
:jedi_completion
(:cache_for ["astropy"]))))));; A .dir-locals.el file proposal in the root of any
;; Python project or Org-mode project tangling Python files
;; to launch eglot automatically.
((nil ;; nil, since Emacs-29.1 filters out irrelevant variable names.
. ((eglot-workspace-configuration
;; Enable the `:pylsp_ruff' plugin and ensure to disable the
;; `:flake8', `:mccabe', and `:pycodestye' plugins.
. (:pylsp (:plugins
(:pylsp_ruff
(:enabled t)
:flake8
(:enabled :json-false)
:mccabe
(:enabled :json-false)
:pycodestyle
(:enabled :json-false)
:jedi
(:auto_import_modules ["numpy"])
:jedi_completion
(:cache_for ["astropy"]))))))))| command | key map | keys |
| xref-find-definition | global-map | (eval |
| xref-pop | global-map | (eval |
| flymake-goto-next-error | eglot-mode-map | (eval |
| flymake-goto-prev-error | eglot-mode-map | (eval |
| eglot-rename | eglot-mode-map | (eval |
| eldoc-doc-buffer | eglot-mode-map | (eval |
Listing lst:make-pylsp-server-patch is useful to propagate eventual patches of a local fork of python-lsp-server.
git -C $HOME/VCS/python-lsp-server diff >pylsp.patchJedi
Listing lst:example-py is a Python example to test whether jedi in combination with eglot works when coding for instance numpy universal functions.
import numpy
import astropy.units as apu
a = numpy.arange(0, 11)
a = numpy.linspace(0, 10, num=11)
a = numpy.arccos(a)
q = apu.Quantity(a, apu.meter)
print(q)Code-cells
Code-cells allows to edit IPython or Jupyter notebooks in Emacs with help from either Jupytext or Pandoc to translate between the ipynb format and different plain text formats. Sofar, I have used code-cells to open ipynb notebooks with
(eval
in Emacs for viewing. Listing lst:configure-code-cells configurescode-cells.
(when (ensure-package-installation 'code-cells)
(with-eval-after-load 'code-cells
(let ((map code-cells-mode-map))
(define-key map (kbd "M-p") #'code-cells-backward-cell)
(define-key map (kbd "M-n") #'code-cells-forward-cell)
(define-key map (kbd "C-c C-c") #'code-cells-eval))))TODO Look into: editing facilities
Libraries
Library dash.el (info)
The library dash.el (info) positions itself as a modern alternative for the list
processing API of cl. It is a requirement of several important packages in this
Emacs setup (for instance citeproc, magit, and smartparens). Listing
lst:configure-dash enables fontification of dash macros and makes
info-lookup-symbol take into account the dash macros.
(when (fboundp #'global-dash-fontify-mode)
(global-dash-fontify-mode))
(when (fboundp #'dash-register-info-lookup)
(with-eval-after-load 'info-look
(dash-register-info-lookup)))Minor Modes (info)
Synchronal multiple-region editing
(when (ensure-package-installation 'iedit)
(require 'iedit nil 'noerror))Unobtrusive whitespace trimming
(when (and (ensure-package-installation 'ws-butler)
(require 'ws-butler nil 'noerror))
(setopt ws-butler-keep-whitespace-before-point nil)
(add-hook 'prog-mode-hook #'ws-butler-mode)
(add-hook 'text-mode-hook #'ws-butler-mode))Structural editing
Structural editing keeps character pairs (for instance parentheses, curly and
square brackets as well as single and double quotes) balanced to leave code (for
instance Lisp and Python) and text (for instance LaTeX and Org) structure
intact. I use smartparens which offers a normal mode (smartparens-mode) and a
strict mode (smartparens-strict-mode). Although both modes insert character
pairs, the normal mode allows to delete one of the paired characters easily
while the strict mode does not. Therefore, the strict mode is more for code
editing since it never breaks programming language rules and the normal mode is
more for text editing where structure is a matter of convention instead of
programming language rules.
For instance, the strict mode in Python allows to delete entire lists, tuples,
or the arguments after the cursor (what Emacs calls point) in a function call
without breaking the character pair balance. In order to repair a broken
character pair balance, insert a single character by prefixing it with "C-q"
bound to quoted-insert.
The smartparens documentation targets experienced Emacs users. The following links show how to put the documentation to practical use:
- Omar Antolin's gist "my-smartparens-config.el" is the first place to look for how to tweak smartparens. However, the gist may be partially obsolete, since it is not part of his current Emacs configuration.
- How to enable smartparens in the minibuffer after eval-expression explains
how the machinery after the first and after later usages of
eval-expressiondiffer and discusses options how to handle those differences.
Listing lst:configure-smartparens aims to configure smartparens for Elisp, LaTeX, Org, and Python.
Despite the provocative post "What if structural editing was a mistake?", smartparens is one of my favorite packages. In particular, smartparens handles matching pairs in Org-mode files with export and source blocks for multiple formats and languages correctly. Therefore, show-smartparens-mode highlights matching pairs immediately in front or after point in such files correctly, contrary to for instance rainbow-delimiters.
(when (and (ensure-package-installation 'smartparens)
;; Require `smartparens-config' instead of `smartparens' to
;; disable pairing of the quote character for lisp modes.
(require 'smartparens-config nil 'noerror))
(setopt sp-base-key-bindings 'sp
sp-override-key-bindings '(("C-(" . sp-backward-barf-sexp)
("C-)" . sp-forward-slurp-sexp)))
(dolist (hook '(conf-toml-mode-hook prog-mode-hook text-mode-hook))
(add-hook hook #'smartparens-mode))
(dolist (hook '(emacs-lisp-mode-hook
ielm-mode-hook
lisp-data-mode-hook
lisp-mode-hook
python-mode-hook
sly-mrepl-mode-hook))
(add-hook hook #'smartparens-strict-mode))
;; https://xenodium.com/emacs-smartparens-auto-indent/index.html
(defun indent-between-pair (&rest _ignored)
(newline)
(indent-according-to-mode)
(forward-line -1)
(indent-according-to-mode))
(dolist (left '("(" "[" "{"))
(sp-local-pair 'prog-mode left
nil :post-handlers '((indent-between-pair "RET"))))
(show-smartparens-global-mode +1))Electric operators
Listing lst:configure-electric-operator configures electric-operator-mode
to add spaces around operators for compatibility with for instance the Black
code formatter for Python.
(when (and (ensure-package-installation 'electric-operator)
(fboundp 'electric-operator-mode))
(add-hook 'c-mode-common-hook #'electric-operator-mode)
(add-hook 'python-mode-hook #'electric-operator-mode))Smart snippets
(when (ensure-package-installation 'yasnippet)
;; Set `yas-alias-to-yas/prefix-p' before loading `yasnippet'.
(setopt yas-alias-to-yas/prefix-p nil)
(when (require 'yasnippet nil 'noerror)
(yas-global-mode +1)))Tempo (info)
The official tempo (info) documentation is very short and the following links
are obsolete or do not reveal the full power of tempo (info) after its
adaptation to lexical-binding:
- Tempo (Emacs Wiki)
- David Kågedal’s elisp
- Emacs's Native Snippets, Emacs's native templating and snippet functionality
Listing lst:configure-tempo-ui provide a function to define local keybindings
and the tools to add tempo-tags to abbreviation tables. Listing
lst:configure-tempo-latex-completing-read shows how to combine tempo, latex
and completing-read for the builtin tempo package that is part of Emacs-28.1
and later. Listing lst:setup-python-tempo configures tempo for python-mode.
(with-eval-after-load 'tempo
(setopt tempo-interactive t)
(defun setup-local-tempo-key-bindings ()
"Initialize local `tempo' key bindings."
(local-set-key (kbd "M-n") #'tempo-forward-mark)
(local-set-key (kbd "M-p") #'tempo-backward-mark))
(defun abbrev-tempo-expand-if-complete ()
"Hook function for `define-abbrev' with `no-self-insert' property `t'."
(tempo-expand-if-complete))
(put 'abbrev-tempo-expand-if-complete 'no-self-insert t)
(defun add-tempo-tags-to-abbrev-table (tempo-tags abbrev-table)
"Add the tags in TEMPO-TAGS to ABBREV-TABLE.
Allows `tempo' expansion by typing <SPC> after a complete `tempo' tag."
(dolist (tag tempo-tags)
(unless (abbrev-symbol (car tag) abbrev-table)
(define-abbrev abbrev-table
(car tag) 1 'abbrev-tempo-expand-if-complete)))))(with-eval-after-load 'latex
(unless (featurep 'tempo)
(require 'tempo))
(defun tempo-latex-environment-handler (element)
(when-let ((ok (eq element 'latex-environment))
(environment
(completing-read "LaTeX environment: "
(LaTeX-environment-list)
#'always 'require-match)))
`(l "\\begin{" ,environment "}" > n > r n "\\end{" ,environment "}" >)))
(cl-pushnew 'tempo-latex-environment-handler tempo-user-elements)
(defun setup-tempo-latex ()
(setup-local-tempo-key-bindings)
(defvar latex-tempo-tags nil)
(tempo-define-template
"LaTeX-environment"
'('latex-environment)
"env"
"Insert a LaTeX environment"
'latex-tempo-tags)
(tempo-use-tag-list 'latex-tempo-tags)
(add-tempo-tags-to-abbrev-table latex-tempo-tags latex-mode-abbrev-table))
(add-hook 'LaTeX-mode-hook 'setup-tempo-latex))(with-eval-after-load 'python
(unless (featurep 'tempo)
(require 'tempo))
(defun setup-tempo-python ()
(defvar python-tempo-tags nil)
(tempo-define-template
"python-base-class"
'("class " p ":" n >)
"clsb" "Define a base class" 'python-tempo-tags)
(tempo-define-template
"python-derived-class"
'("class " p "(" p "):" n >)
"clsd" "Define a derived class" 'python-tempo-tags)
(tempo-define-template
"python-class-method"
'("@classmethod" > n > "def " p "(cls, " p "):" n >)
"defc" "Define a class method" 'python-tempo-tags)
(tempo-define-template
"python-function"
'("def " p "(" p "):" n >)
"deff" "Define a function" 'python-tempo-tags)
(tempo-define-template
"python-normal-method"
'("def " p "(self, " p "):" n >)
"defm" "Define a normal method" 'python-tempo-tags)
(tempo-define-template
"python-static-method"
'("@staticmethod" > n > "def " p "(" p "):" n >)
"defs" "Define a static method" 'python-tempo-tags)
(tempo-use-tag-list 'python-tempo-tags)
(add-tempo-tags-to-abbrev-table python-tempo-tags python-mode-abbrev-table)
(setup-local-tempo-key-bindings))
(add-hook 'python-mode-hook 'setup-tempo-python))Display (info)
Narrowing
Narrowing means focusing in on some portion of the buffer and widening means
focussing out on the whole buffer. This allows to concentrate temporarily on
for instance a particular function or paragraph by removing clutter. The "Do
What I Mean" narrow-or-widen-dwim function allows to toggle between narrowed and
widened buffer states. Here, the function narrow-or-widen-dwim operates also
on any Org table, Org source block, Org block, or Org subtree.
(with-eval-after-load 'emacs
(declare-function org-at-table-p "org" (&optional table-type))
(defun org-narrow-to-table ()
"Narrow buffer to table at point."
(interactive)
(if (org-at-table-p)
(narrow-to-region (org-table-begin) (org-table-end))
(user-error "Not in a table")))
(defun narrow-or-widen-dwim (p)
"Widen if buffer is narrowed, narrow \"Do What I Mean\" otherwise.
DWIM means: region, Org table, Org source block, Org block, Org
subtree, LaTeX environment, TeX group, or defun, whichever
applies first. Narrowing to org-src-block actually calls
`org-edit-src-code'.
With prefix P, don't widen, just narrow even if buffer is already
narrowed."
(interactive "P")
(declare (interactive-only))
(cond ((and (buffer-narrowed-p) (not p))
(widen))
((and (bound-and-true-p org-src-mode) (not p))
(org-edit-src-exit))
((region-active-p)
(narrow-to-region (region-beginning) (region-end)))
((derived-mode-p 'org-mode)
(or (with-demoted-errors "DWIM: %S" (org-narrow-to-table) t)
(with-demoted-errors "DWIM: %S" (org-edit-src-code) t)
(with-demoted-errors "DWIM: %S" (org-narrow-to-block) t)
(org-narrow-to-subtree)))
((derived-mode-p 'latex-mode)
(LaTeX-narrow-to-environment))
((derived-mode-p 'tex-mode)
(TeX-narrow-to-group))
(t
(narrow-to-defun))))
(define-key ctl-x-map (kbd "n t") #'org-narrow-to-table)
(define-key ctl-x-map (kbd "C-n") #'narrow-or-widen-dwim))Visualize color codes and names
Listing lst:enable-rainbow-mode enables rainbow-mode to colorize color codes
and names in buffers for debugging.
(when (and (ensure-package-installation 'rainbow-mode)
(fboundp 'rainbow-mode))
(setopt rainbow-x-colors-major-mode-list '(c++-mode
c-mode
emacs-lisp-mode
inferior-emacs-lisp-mode
java-mode
lisp-interaction-mode
org-mode
python-mode))
(rainbow-mode +1))Flash the line around point for visual feedback
Listing lst:flash-line-around-point implements flashing of the line around point for visual feedback after a selection of commands that make it hard to track point movements visually.
;; Ensure loading `pulse' with the dynamic variables `pulse-delay' and
;; `pulse-iterations' before masking them lexically instead of after
;; to prevent the warning triggered by lazy loading.
(when (require 'pulse nil 'noerror)
;; https://karthinks.com/software/batteries-included-with-emacs/
;; https://github.com/karthink/.emacs.d/blob/master/init.el#L2077
(defun flash-line-around-point (&rest _)
"Flash the line around point."
(let ((pulse-iterations 16)
(pulse-delay 0.1))
(pulse-momentary-highlight-one-line (point))))
(dolist (command '(scroll-up-command
scroll-down-command
recenter-top-bottom
other-window))
(advice-add command :after #'flash-line-around-point)))Applications
Reading News and Mail (info)
- How to use Emacs as a USENET reader with Gnus
- A practical guide to Gnus
- Fast reading and searching of Gmane.io with Gnus
- Setting up Leafnode on macOS
- Gnus
- Stupid GMail hacks for Gnus
- More stupid Gnus hacks
- See Mu4e section of Phundrak's Emacs configuration
- Pass: the standard unix password manager
- How to use Pass, a command-line password manager for Unix systems
- Clever uses of pass, the Unix password manager
| command | map | keys |
|---|---|---|
| gnus-group-list-active | gnus-group-list-map | (eval |
| gnus-group-list-all-groups | gnus-group-mode-map | (eval |
| gnus-group-toggle-subscription | gnus-group-mode-map | (eval |
(with-eval-after-load 'gnus
(setopt gnus-select-method '(nntp "news.gmane.io")))
(with-eval-after-load 'gnus-start
(setopt gnus-check-bogus-newsgroups nil
gnus-check-new-newsgroups 'ask-server
gnus-read-newsrc-file t
gnus-read-active-file 'some
gnus-save-killed-list t
gnus-save-newsrc-file t
gnus-use-dribble-file t))
(with-eval-after-load 'gnus-sum
(setopt gnus-thread-hide-subtree t))Sending Mail (info)
- Email setup in Emacs with Mu4e on macOS
- Setting up multiple IMAP and SMTP accounts in Gnus
- Emacs on Macos Monterey
- Msmtp resource file for posteo.net
- GPG tutorial
- Cryptographic key server examples
- Fastmail setup with Emacs, mu4e and mbsync on macOS
(setopt user-full-name "Gerard Vermeulen"
user-mail-address "gerard.vermeulen@posteo.net")
(with-eval-after-load 'message
(setopt message-sendmail-envelope-from 'header))(with-eval-after-load 'sendmail
(setopt mail-specify-envelope-from t
mail-envelope-from 'header
send-mail-function #'sendmail-send-it
sendmail-program (executable-find "msmtp")))# Set default values for all accounts.
defaults
auth on
tls on
logfile ~/.msmtp.log
# CNRS on Darwin
# security add-generic-password -s cnrs -a gerard.vermeulen@neel.cnrs.fr -w
account cnrs
host smtps.grenoble.cnrs.fr
port 465
tls_starttls off
from gerard.vermeulen@neel.cnrs.fr
user gerard.vermeulen@neel.cnrs.fr
passwordeval security find-generic-password -s cnrs -w
# https://notmuchmail.org/emacstips/#index11h2
# https://wiki.debian.org/msmtp
# https://tushartyagi.com/blog/configure-mu4e-and-msmtp/
# https://www.emacswiki.org/emacs/GnusMSMTP
# https://www.ying-ish.com/essay/emacs-notmuch-mbsync-msmtp-email/
# Local Variables:
# mode: conf-unix
# End:# Set default values for all accounts.
defaults
auth on
tls on
tls_trust_file /etc/ssl/certs/ca-certificates.crt
logfile ~/.msmtp.log
# CNRS on Linux
# secret-tool store --label=msmtp host smtps.grenoble.cnrs.fr service smtp user gerard.vermeulen@neel.cnrs.fr
account cnrs
host smtps.grenoble.cnrs.fr
port 465
tls_starttls off
from gerard.vermeulen@neel.cnrs.fr
user gerard.vermeulen@neel.cnrs.fr
# https://notmuchmail.org/emacstips/#index11h2
# https://wiki.debian.org/msmtp
# https://tushartyagi.com/blog/configure-mu4e-and-msmtp/
# https://www.emacswiki.org/emacs/GnusMSMTP
# https://www.ying-ish.com/essay/emacs-notmuch-mbsync-msmtp-email/
# Local Variables:
# mode: conf-unix
# End:Elfeed: Emacs web feed reader
Listing lst:set-elfeed-options sets elfeed options, binds the elfeed
command, and makes a minimal attempt to enable emms.
(when (and (ensure-package-installation 'elfeed)
(fboundp 'elfeed))
(global-set-key (kbd "C-x w") #'elfeed)
(with-eval-after-load 'elfeed
(setopt
elfeed-feeds
'(("http://www.howardism.org/index.xml" h-abrams)
("https://bitspook.in/archive/feed.xml" c-singh)
("https://emacshorrors.com/feed.atom" v-schneidermann)
("https://emacsninja.com/emacs.atom" v-schneidermann)
("https://feeds.feedburner.com/InterceptedWithJeremyScahill" j-scahill)
("https://frame.work/fr/fr/blog.rss" framework)
("https://nullprogram.com/feed/" c-wellons)
("https://oremacs.com/atom.xml" o-krehel)
("https://planet.emacslife.com/atom.xml" planet-emacs)
("https://protesilaos.com/codelog.xml" p-stavrou)
("https://sachachua.com/blog/category/emacs/feed" s-chua)
("https://sciencescitoyennes.org/feed/" sciences)
("https://tdodge.consulting/blog/rss.xml" t-dodge)
("https://talkpython.fm/episodes/rss" talk-python)
("https://updates.orgmode.org/feed/updates" org-updates)
("https://www.bof.nl/rss/" bof)
("https://www.democracynow.org/podcast-video.xml" dn)
("https://www.laquadrature.net/fr/rss.xml" lqdn)
("https://www.lemonde.fr/blog/huet/feed/" sciences))))
(with-eval-after-load 'elfeed-show
(when (fboundp 'emms-all)
(emms-all))))Emacs Multimedia System (info)
The link my emms and elfeed setup is a nice introduction to configuring and
using emms with elfeed. Listing lst:set-emms-options configures emms.
(when (ensure-package-installation 'emms)
(with-eval-after-load 'emms
(setopt emms-player-list '(emms-player-mpd emms-player-mpv))
(emms-all))
(with-eval-after-load 'emms-mode-line
(setopt emms-mode-line-format ""))
(with-eval-after-load 'emms-player-mpd
(setopt emms-player-mpd-music-directory (expand-file-name "~/Music")
emms-player-mpd-server-name "localhost"
emms-player-mpd-server-port "6600"
emms-player-mpd-verbose t))
(with-eval-after-load 'emms-player-mpv
(setopt emms-player-mpv-ipc-method 'ipc-server
emms-player-mpv-update-metadata t))
(with-eval-after-load 'emms-playing-time
(setopt emms-playing-time-display-format " %s "))
(with-eval-after-load 'emms-playlist-mode
(setopt emms-playlist-mode-center-when-go t))
(with-eval-after-load 'emms-streams
(setopt emms-streams-file
(no-littering-expand-etc-file-name "emms/streams.emms"))))Hiding spurious buffers
When emms-player-mpd opens a connection to mpd and mpd is not running,
mpd responds with a message of the form "OK MPD 0.23.5". Neither
emms-player-mpd nor its support library tq anticipate the "OK MPD 0.23.5"
message, but send such messages to a new intrusive buffer called *spurious*.
Listing lst:hiding-spurious-buffers hides those *spurious* buffers, but you
can always switch to them. See:
- The Zen of Buffer Display (info)
- Configuring the Emacs display system
- Demystifying Emacs's Window Manager
for technical information.
(with-eval-after-load 'emms-player-mpd
;; https://www.masteringemacs.org/article/demystifying-emacs-window-manager
;; Hide `*spurious*' buffers, but you can always switch to them:
(add-to-list 'display-buffer-alist
'("\\*spurious\\*.*" display-buffer-no-window
(allow-no-window . t))))Music Player Daemon configuration
Listing lst:darwin-mpd-conf proposes a Music Player Daemon configuration file on
Darwin that keeps each new connection for a day in order to reduce the rate of
*spurious* generation.
music_directory "~/Music"
playlist_directory "~/.mpd/playlists"
db_file "~/.mpd/mpd.db"
log_file "~/.mpd/mpd.log"
pid_file "~/.mpd/mpd.pid"
state_file "~/.mpd/mpdstate"
follow_outside_symlinks "yes"
follow_inside_symlinks "yes"
bind_to_address "localhost"
port "6600"
connection_timeout "86400"
audio_output {
type "osx"
name "CoreAudio"
mixer_type "software"
}GNU Free Documentation License
Local variables linking to Latexmk save-compile-display-loop
Only the Org source file shows the local variables footer.