feat(grep): fn_transform_cmd with ctrl-g toggle (#1927)

Author: ibhagwan

lua/fzf-lua/make_entry.lua

@@ -202,9 +202,18 @@ M.preprocess = function(opts)
       end
     end
 
+    -- For custom command transformations (#1927)
+    opts.fn_transform_cmd =
+        load_config_section("__resume_data.opts.fn_transform_cmd", "function", true)
+
     -- did the caller request rg with glob support?
     -- manipulation needs to be done before the argv replacement
-    if opts.rg_glob then
+    if opts.fn_transform_cmd then
+      local query = argv(nil, opts.debug)
+      local new_cmd, new_query = opts.fn_transform_cmd(query, opts.cmd:gsub(argvz, ""), opts)
+      opts.cmd = new_cmd or opts.cmd
+      opts.cmd = opts.cmd:gsub(argvz, libuv.shellescape(new_query or query))
+    elseif opts.rg_glob then
       local query = argv(nil, opts.debug)
       local search_query, glob_args = M.glob_parse(query, opts)
       if glob_args then
@@ -219,14 +228,6 @@ M.preprocess = function(opts)
     end
   end
 
-  -- For custom command transformations (#1927)
-  opts.fn_transform_cmd =
-      load_config_section("__resume_data.opts.fn_transform_cmd", "function", true)
-  if opts.fn_transform_cmd then
-    local query = argv(nil, opts.debug)
-    opts.cmd = opts.fn_transform_cmd(query, opts.cmd:gsub("{argv.*}", "") ,opts)
-  end
-
   -- nifty hack to avoid having to double escape quotations
   -- see my comment inside 'live_grep' initial_command code
   if opts.argv_expr then

lua/fzf-lua/providers/grep.lua

@@ -54,7 +54,14 @@ local get_grep_cmd = function(opts, search_query, no_esc)
     opts.rg_glob = false
   end
 
-  if opts.rg_glob then
+  if opts.fn_transform_cmd then
+    local new_cmd, new_query = opts.fn_transform_cmd(search_query, opts.cmd, opts)
+    if new_cmd then
+      opts.no_esc = true
+      opts.search = new_query
+      return new_cmd
+    end
+  elseif opts.rg_glob then
     local new_query, glob_args = make_entry.glob_parse(search_query, opts)
     if glob_args then
       -- since the search string mixes both the query and