Added command to open diffview

lua/gitlab/utils/init.lua

@@ -10,6 +10,20 @@ local function get_git_root()
   end
 end
 
+local branch_exists = function(b)
+  local is_git_branch = io.popen("git rev-parse --is-inside-work-tree 2>/dev/null"):read("*a")
+  if is_git_branch == "true\n" then
+    for line in io.popen("git branch 2>/dev/null"):lines() do
+      line = line:gsub("%s+", "")
+      if line == b then
+        return true
+      end
+    end
+  end
+  return false
+end
+
+
 local function get_relative_file_path()
   local git_root = get_git_root()
   if git_root ~= nil then
@@ -118,6 +132,7 @@ end
 
 
 local function jump_to_file(filename, line_number)
+  if line_number == nil then line_number = 1 end
   vim.api.nvim_command("wincmd l")
   local bufnr = vim.fn.bufnr(filename)
   if bufnr ~= -1 then
@@ -244,5 +259,6 @@ M.create_popup_state = create_popup_state
 M.exit = exit
 M.read_file = read_file
 M.split_diff_view_filename = split_diff_view_filename
+M.branch_exists = branch_exists
 M.P = P
 return M