Add some components: git file and mode

lua/hardline/git.lua

@@ -0,0 +1,28 @@
+local fn, vim = vim.fn, vim
+local g = vim.g
+local M = {}
+
+function M.get_hunks()
+  if not g.loaded_gitgutter then
+    return ''
+  end
+  local summary = fn.GitGutterGetHunkSummary()
+  return table.concat({
+    string.format('+%d', summary[1]),
+    string.format('~%d', summary[2]),
+    string.format('-%d', summary[3]),
+  }, ' ')
+end
+
+function M.get_branch()
+  return ''
+end
+
+function M.get_component()
+  return table.concat({
+    [[%{luaeval('require("hardline.git").get_hunks()')}]],
+    [[%{luaeval('require("hardline.git").get_branch()')}]],
+  })
+end
+
+return M