feat(vim): show git branch and relative filepath in status line

.config/nvim/init.vim

@@ -264,6 +264,28 @@ nnoremap <C-n> :NERDTreeMirror<CR>:NERDTreeFind<CR>
 " Rainbow Brackets
 let g:rainbow_active = 1
 
+" Lightline
+let g:lightline = {
+      \ 'colorscheme': 'wombat',
+      \ 'active': {
+      \   'left': [ [ 'mode', 'paste' ],
+      \             [ 'gitbranch', 'readonly', 'filename', 'modified' ] ],
+      \ },
+      \ 'component_function': {
+      \   'gitbranch': 'FugitiveHead',
+      \   'filename': 'LightlineFilename',
+      \ },
+      \ }
+
+function! LightlineFilename()
+  let root = fnamemodify(get(b:, 'git_dir'), ':h')
+  let path = expand('%:p')
+  if path[:len(root)-1] ==# root
+    return path[len(root)+1:]
+  endif
+  return expand('%')
+endfunction
+
 " -----------------------
 " Remaps
 " -----------------------