feat: configure LSP in neovim

add LSP config in $XDG_CONFIG_HOME/nvim/lua/lsp
add language servers:
        - clangd (C/C++)
        - jedi (Python)

.config/nvim/init.lua

@@ -9,3 +9,9 @@ require("maps")         -- ./lua/maps.lua
 require("statusline")   -- ./lua/statusline.lua
 
 require("polyjuice")    -- colorscheme
+
+-- LSP
+require("lsp")          -- ./lua/lsp/init.lua
+require("lsp.maps")     -- ./lua/lsp/maps.lua
+require("lsp.c")        -- ./lua/lsp/c.lua
+require("lsp.python")   -- ./lua/lsp/python.lua

.config/nvim/lua/lsp/c.lua

@@ -0,0 +1,6 @@
+-- Author        : swytch
+-- Created       : Tuesday May 18, 2021 12:08:51 CET
+-- License       : GPLv3
+-- Description   : clangd config file for lsp
+
+require("lspconfig").clangd.setup {}

.config/nvim/lua/lsp/init.lua

@@ -0,0 +1,21 @@
+-- Author        : swytch
+-- Created       : Tuesday May 18, 2021 12:08:51 CET
+-- License       : GPLv3
+-- Description   : neovim lsp config file
+
+vim.fn.sign_define(
+        "LspDiagnosticsSignError",
+        {texthl = "LspDiagnosticsSignError", text = "", numhl = "LspDiagnosticsSignError"}
+)
+vim.fn.sign_define(
+        "LspDiagnosticsSignWarning",
+        {texthl = "LspDiagnosticsSignWarning", text = "", numhl = "LspDiagnosticsSignWarning"}
+)
+vim.fn.sign_define(
+        "LspDiagnosticsSignHint",
+        {texthl = "LspDiagnosticsSignHint", text = "", numhl = "LspDiagnosticsSignHint"}
+)
+vim.fn.sign_define(
+        "LspDiagnosticsSignInformation",
+        {texthl = "LspDiagnosticsSignInformation", text = "", numhl = "LspDiagnosticsSignInformation"}
+)

.config/nvim/lua/lsp/lua.lua

@@ -0,0 +1,39 @@
+-- Author        : swytch
+-- Created       : Tuesday May 18, 2021 12:08:51 CET
+-- License       : GPLv3
+-- Description   : sumneko (lua) config file for lsp
+
+local system_name = "Linux"
+
+-- set the path to the sumneko installation; if you previously installed via the now deprecated :LspInstall, use
+local sumneko_root_path = vim.fn.stdpath('cache')..'/lspconfig/sumneko_lua/lua-language-server'
+local sumneko_binary = sumneko_root_path.."/bin/"..system_name.."/lua-language-server"
+
+require'lspconfig'.sumneko_lua.setup {
+        cmd = {sumneko_binary, "-E", sumneko_root_path .. "/main.lua"};
+        settings = {
+                Lua = {
+                        runtime = {
+                        -- Tell the language server which version of Lua you're using (most likely LuaJIT in the case of Neovim)
+                                version = 'LuaJIT',
+                                -- Setup your lua path
+                                path = vim.split(package.path, ';'),
+                        },
+                        diagnostics = {
+                                -- Get the language server to recognize the `vim` global
+                                globals = {'vim'},
+                        },
+                        workspace = {
+                                -- Make the server aware of Neovim runtime files
+                                library = {
+                                [vim.fn.expand('$VIMRUNTIME/lua')] = true,
+                                [vim.fn.expand('$VIMRUNTIME/lua/vim/lsp')] = true,
+                                },
+                        },
+                        -- Do not send telemetry data containing a randomized but unique identifier
+                        telemetry = {
+                                enable = false,
+                        },
+                },
+        },
+}

.config/nvim/lua/lsp/maps.lua

@@ -0,0 +1,11 @@
+-- Author        : swytch
+-- Created       : Tuesday May 18, 2021 12:08:51 CET
+-- License       : GPLv3
+-- Description   : neovim lsp mappings file
+
+utils = require("utils")
+
+utils.map("n", "gd", "<cmd>lua vim.lsp.buf.definition()<CR>")
+utils.map("n", "gD", "<cmd>lua vim.lsp.buf.declaration()<CR>")
+utils.map("n", "gr", "<cmd>lua vim.lsp.buf.references()<CR>")
+utils.map("n", "gi", "<cmd>lua vim.lsp.buf.implementation()<CR>")

.config/nvim/lua/lsp/python.lua

@@ -0,0 +1,6 @@
+-- Author        : swytch
+-- Created       : Tuesday May 18, 2021 15:03:43 CET
+-- License       : GPLv3
+-- Description   : jedi (python) config file for lsp
+
+require("lspconfig").jedi_language_server.setup{}

.config/nvim/lua/plugins.lua

@@ -35,6 +35,9 @@ return require("packer").startup(function()
                 cmd = {"Telescope"}
         }
 
+        -- LSP
+        use "neovim/nvim-lspconfig"
+
         -- display colors directly in editor
         use {
                 "norcalli/nvim-colorizer.lua",

.config/nvim/lua/settings.lua

@@ -36,6 +36,7 @@ o.background            = "dark"
 o.shortmess             = o.shortmess .. "c"
 w.number                = true
 w.relativenumber        = true
+w.signcolumn            = "yes"
 o.listchars             = "tab:<->,nbsp:␣,trail:·,extends:>,precedes:<"
 o.showmatch             = true
 o.ignorecase            = true

.config/paru/pkglist.txt

@@ -16,6 +16,7 @@ binutils
 bison
 capitaine-cursors
 cdparanoia
+clang
 cmake
 cronie
 dash
@@ -40,6 +41,7 @@ iftop
 imagemagick
 isync
 iwd
+jedi-language-server
 libnotify
 libtool
 linux