Powerline 的概念很有意思，所以GitHub上很多類似的專案。
但是，Powerline 這個專案本身有點過時了。

如果是喜歡這樣的風格，推薦兩個給你：

• vim-airline: 開箱即用的類Powerline 插件，對許多第三方插件都做了良好適配

There's already powerline, why yet another statusline?

• 100% vimscript; no python needed.

What about vim-powerline?

• vim-powerline has been deprecated in favor of the newer, unifying powerline, which is under active development; the new version is written in python at the core and exposes various bind s that also tmux, bash, zsh, and others.

• lightline.vim: 高自由度的類Powerline 插件， 需要自己動手對第三方插件做適配，作者有提供參考配置

Why yet another clone of powerline?

• vim-powerline is a nice plugin, but deprecated.

• powerline is a nice plugin, but difficult to configure.

• vim-airline is a nice plugin, but it uses too much functions of other plugins, which should be done by users in .vimrc.

你的問題，其實就是這兩個插件要解決的：純vimL實現，不需要調用外部進程
畢竟對於一個頻繁刷新的狀態列來說，調用外部進程的開銷太大了。