[nvim] feat: shorten path in statusline if needed

.config/nvim/lua/statusline.lua

@@ -98,6 +98,29 @@ local function get_mode_color(m)
     return color[m]
 end
 
+-- from https://github.com/nvim-lualine/lualine.nvim/blob/master/lua/lualine/components/filename.lua
+local function shorten_path(path, max_len)
+    local sep = '/'
+    local len = #path
+    if len <= max_len then
+        return path
+    end
+
+    local segments = vim.split(path, sep)
+    for idx = 1, #segments - 1 do
+        if len <= max_len then
+            break
+        end
+
+        local segment = segments[idx]
+        local shortened = segment:sub(1, vim.startswith(segment, '.') and 2 or 1)
+        segments[idx] = shortened
+        len = len - (#segment - #shortened)
+    end
+
+    return table.concat(segments, sep)
+end
+
 -- from https://github.com/nvim-lua/lsp-status.nvim/blob/master/lua/lsp-status/diagnostics.lua
 local function get_lsp_diagnostics()
     local result = {}
@@ -138,14 +161,16 @@ end
 end
 
 local function statusline_focused()
+    local file = vim.fn.expand("%:p:~")
     local diagnostics = get_lsp_diagnostics()
     local mode = vim.fn.mode()
     local mg = get_mode(mode)
     local accent_color = get_mode_color(mg)
+    local winwidth = vim.fn.winwidth(0)
 
     local left = table.concat {
         gen_section(accent_color, { get_mode_display_name(mg) }),
-    gen_section("%#Middle#", {"%f"}),
+        gen_section("%#Middle#", { shorten_path(file, winwidth / 3) }),
         gen_section("%#Bottom#", { "%m", "%r" }),
         gen_section(
             "%#Alert#",