feat: add git_stash picker (#800)

lua/telescope/actions/init.lua

@@ -340,6 +340,23 @@ actions.git_create_branch = function(prompt_bufnr)
   end
 end
 
+--- Applies an existing git stash
+---@param prompt_bufnr number: The prompt bufnr
+actions.git_apply_stash = function(prompt_bufnr)
+  local selection = action_state.get_selected_entry()
+  actions.close(prompt_bufnr)
+  local _, ret, stderr = utils.get_os_command_output({ 'git', 'stash', 'apply', '--index', selection.value })
+  if ret == 0 then
+    print("applied: " .. selection.value)
+  else
+    print(string.format(
+      'Error when applying: %s. Git returned: "%s"',
+      selection.value,
+      table.concat(stderr, '  ')
+    ))
+  end
+end
+
 --- Checkout an existing git branch
 ---@param prompt_bufnr number: The prompt bufnr
 actions.git_checkout = function(prompt_bufnr)

lua/telescope/builtin/git.lua

@@ -57,6 +57,25 @@ git.commits = function(opts)
   }):find()
 end
 
+git.stash = function(opts)
+  local results = utils.get_os_command_output({
+    'git', '--no-pager', 'stash', 'list',
+  }, opts.cwd)
+
+  pickers.new(opts, {
+    prompt_title = 'Git Stash',
+    finder = finders.new_table {
+      results = results,
+      entry_maker = opts.entry_maker or make_entry.gen_from_git_stash(),
+    },
+    previewer = previewers.git_stash_diff.new(opts),
+    sorter = conf.file_sorter(opts),
+    attach_mappings = function()
+      actions.select_default:replace(actions.git_apply_stash)
+      return true
+    end
+  }):find()
+end
 git.bcommits = function(opts)
   local results = utils.get_os_command_output({
     'git', 'log', '--pretty=oneline', '--abbrev-commit', vim.fn.expand('%')

lua/telescope/make_entry.lua

@@ -240,6 +240,21 @@ do
   end
 end
 
+function make_entry.gen_from_git_stash()
+  return function(entry)
+    if entry == "" then
+      return nil
+    end
+    local splitted = vim.split(entry, ':')
+    return {
+      value = splitted[1],
+      ordinal = splitted[3],
+      display = splitted[3]
+    }
+  end
+end
+
+
 function make_entry.gen_from_git_commits()
   local displayer = entry_display.create {
     separator = " ",

lua/telescope/previewers/buffer_previewer.lua

@@ -502,6 +502,23 @@ previewers.git_branch_log = defaulter(function(opts)
   }
 end, {})
 
+previewers.git_stash_diff = defaulter(function(opts)
+  return previewers.new_buffer_previewer {
+    get_buffer_by_name = function(_, entry)
+      return entry.value
+    end,
+
+    define_preview = function(self, entry, _)
+      putils.job_maker({ 'git', '--no-pager', 'stash', 'show', '-p',  entry.value }, self.state.bufnr, {
+        value = entry.value,
+        bufname = self.state.bufname,
+        cwd = opts.cwd
+      })
+      putils.regex_highlighter(self.state.bufnr, 'diff')
+    end
+  }
+end, {})
+
 previewers.git_commit_diff = defaulter(function(opts)
   return previewers.new_buffer_previewer {
     get_buffer_by_name = function(_, entry)

lua/telescope/previewers/init.lua

@@ -263,6 +263,7 @@ previewers.vim_buffer_qflist = buffer_previewer.qflist
 previewers.git_branch_log = buffer_previewer.git_branch_log
 previewers.git_commit_diff = buffer_previewer.git_commit_diff
 previewers.git_file_diff = buffer_previewer.git_file_diff
+previewers.git_stash_diff = buffer_previewer.git_stash_diff
 
 
 previewers.ctags = buffer_previewer.ctags