tv vim: use ctrlp

tv/2configs/vim.nix

@@ -14,6 +14,7 @@ let
   };
 
   extra-runtimepath = concatMapStringsSep "," (pkg: "${pkg.rtp}") [
+    pkgs.vimPlugins.ctrlp
     pkgs.vimPlugins.undotree
     (pkgs.vimUtils.buildVimPlugin {
       name = "file-line-1.0";
@@ -285,6 +286,9 @@ let
   vim = pkgs.writeDashBin "vim" ''
     set -efu
     (umask 0077; exec ${pkgs.coreutils}/bin/mkdir -p ${toString mkdirs})
+    if test $# = 0 && test -e "$PWD/.ctrlpignore"; then
+      set -- +CtrlP
+    fi
     exec ${pkgs.vim}/bin/vim "$@"
   '';
 
@@ -332,9 +336,6 @@ let
 
     au BufRead,BufNewFile /dev/shm/* set nobackup nowritebackup noswapfile
 
-    nmap <esc>q :buffer
-    nmap <M-q> :buffer
-
     cnoremap <C-A> <Home>
 
     noremap  <C-c> :q<cr>
@@ -360,6 +361,41 @@ let
     noremap <esc>[c <nop> | noremap! <esc>[c <nop>
     noremap <esc>[d <nop> | noremap! <esc>[d <nop>
     vnoremap u <nop>
+
+    "
+    " CtrlP-related configuration
+    "
+    hi CtrlPPrtCursor ctermbg=199
+    hi CtrlPMatch     ctermfg=226
+    set showtabline=0
+    let g:ctrlp_cmd = 'CtrlPMixed'
+    let g:ctrlp_map = '<esc>q'
+    let g:ctrlp_working_path_mode = 'a'
+    " Cannot use autoignore extension because it fails to initialize properly:
+    " when started the first time, e.g. using `vim +CtrlP`, then it won't use
+    " patterns from .ctrlpignore until CtrlP gets reopened and F5 pressed...
+    fu s:gen_ctrlp_custom_ignore()
+      let l:prefix = getcwd()
+      let l:pats = readfile(l:prefix . "/.ctrlpignore")
+      let l:pats = filter(l:pats, 's:ctrlpignore_filter(v:val)')
+      let l:pats = map(l:pats, 's:ctrlpignore_rewrite(v:val)')
+      return l:prefix . "\\(" . join(l:pats, "\\|") . "\\)"
+    endfu
+    fu s:ctrlpignore_filter(s)
+      " filter comments and blank lines
+      return match(a:s, '^\s*\(#.*\)''$') == -1
+    endfu
+    fu s:ctrlpignore_rewrite(s)
+      if a:s[0:0] == "^"
+        return "/" . a:s[1:]
+      else
+        return "/.*" . a:s
+      endif
+    endfu
+    try
+      let g:ctrlp_custom_ignore = s:gen_ctrlp_custom_ignore()
+    catch /^Vim\%((\a\+)\)\=:E484/
+    endtry
   '';
 in
 out