feat(setqflist): include untracked files when attach_to_untracked is enabled

When using setqflist('all'), untracked files are now included in the
quickfix list if the attach_to_untracked config option is enabled.

Closes #829

Author: nemanjamalesija

doc/gitsigns.txt

@@ -160,7 +160,9 @@ setqflist({target}, {opts}, {callback})                 *gitsigns.setqflist()*
                      • `"attached"`: All attached buffers.
                      • `"all"`: All modified files for each git
                        directory of all attached buffers in addition
-                       to the current working directory.
+                       to the current working directory. When
+                       `attach_to_untracked` is enabled, untracked
+                       files are also included.
         {opts}     (`Gitsigns.SetqflistOpts?`): Additional options.
                    • {use_location_list}: (`boolean?`)
                      Populate the location list instead of the quickfix list.

lua/gitsigns/actions.lua

@@ -896,7 +896,9 @@ CP.show_commit = complete_heads
 ---   - `"attached"`: All attached buffers.
 ---   - `"all"`: All modified files for each git
 ---     directory of all attached buffers in addition
----     to the current working directory.
+---     to the current working directory. When
+---     `attach_to_untracked` is enabled, untracked
+---     files are also included.
 --- @param opts Gitsigns.SetqflistOpts? Additional options.
 --- @param callback? fun(err?: string)
 function M.setqflist(target, opts, callback)

lua/gitsigns/actions/qflist.lua

@@ -74,7 +74,7 @@ local function buildqflist(target)
     end
 
     for _, r in pairs(repos) do
-      for _, f in ipairs(r:files_changed(config.base)) do
+      for _, f in ipairs(r:files_changed(config.base, config.attach_to_untracked)) do
         local f_abs = r.toplevel .. '/' .. f
         local stat = uv.fs_stat(f_abs)
         if stat and stat.type == 'file' then

lua/gitsigns/git/repo.lua

@@ -105,21 +105,27 @@ end
 
 --- @async
 --- @param base string?
+--- @param include_untracked? boolean
 --- @return string[]
-function M:files_changed(base)
+function M:files_changed(base, include_untracked)
   if base and base ~= ':0' then
     local results = self:command({ 'diff', '--name-status', base })
     for i, result in ipairs(results) do
       results[i] = vim.split(result:gsub('\t', ' '), ' ', { plain = true })[2]
     end
+    if include_untracked then
+      local untracked = self:command({ 'ls-files', '--others', '--exclude-standard' })
+      vim.list_extend(results, untracked)
+    end
     return results
   end
 
   local results = self:command({ 'status', '--porcelain', '--ignore-submodules' })
 
   local ret = {} --- @type string[]
   for _, line in ipairs(results) do
-    if line:sub(1, 2):match('^.M') then
+    local status = line:sub(1, 2)
+    if status:match('^.M') or (include_untracked and status == '??') then
       ret[#ret + 1] = line:sub(4, -1)
     end
   end