Further migration of expressive functionality to fennel

fnl/config/autocmds.fnl

@@ -0,0 +1,29 @@
+;; Neovim autocommands and runtime logic in Fennel
+
+;; Highlight on yank
+(vim.api.nvim_create_autocmd :TextYankPost
+  {:desc "Highlight when yanking (copying) text"
+   :group (vim.api.nvim_create_augroup :kickstart-highlight-yank {:clear true})
+   :callback #(vim.highlight.on_yank)})
+
+;; FileType custom commentstrings
+(vim.api.nvim_create_autocmd :FileType
+  {:pattern ["nix" "flake"]
+   :callback #(set vim.bo.commentstring "# %s")})
+
+(vim.api.nvim_create_autocmd :FileType
+  {:pattern ["scallop"]
+   :callback #(set vim.bo.commentstring "//%s")})
+
+;; Root changer on VimEnter (Custom pipeline logic)
+(vim.api.nvim_create_autocmd :VimEnter
+  {:desc "Change CWD to project root if inside git repo"
+   :callback (fn []
+               (let [current-file (vim.fn.expand "%:p")]
+                 (when (not= current-file "")
+                   (let [find-results (vim.fs.find [".git"] {:upward true :path (vim.fs.dirname current-file)})
+                         git-dir (. find-results 1)]
+                     (when git-dir
+                       (let [root-dir (vim.fs.dirname git-dir)]
+                         (vim.cmd.cd root-dir)
+                         (print (.. "Root changed to: " root-dir))))))))})