How to find files which contain given fragment?

Question

FZF (fuzzy finder) is very convenient to find files by filename. However, I sometimes only know a function name or a part of the name. Is there a way to get FZF-like search, which would filter files by their content? git grep <pattern> command line command provides the functionality I want, but it works outside VIM.

Is there a way to get git grep search results inside VIM? It would be better to get real-time results like in FZF, when I type letters - the suggested file names change.

Answer 1

fzf.vim provides several commands suited for this task:

• :Rg which uses ripgrep
• :Ag which uses the Silver Searcher (ag)

These are external tools, they must be installed on the system (e.g. install ripgrep on a Debian based system:)

sudo apt install ripgrep

It is also possible to use fzf as a wrapper for gitgrep. The link above provides a Ggrep command to do so:

command! -bang -nargs=* GGrep
  \ call fzf#vim#grep(
  \   'git grep --line-number -- '.shellescape(<q-args>), 0,
  \   fzf#vim#with_preview({'dir': systemlist('git rev-parse --show-toplevel')[0]}), <bang>0)

Read more at :h fzf-vim. A list of fzf vim commands can be found under :h fzf-vim-commands.