Another powerful technique: readline bindings. This alias brings up a fzf-style file picker on Ctrl-F. Any picked filenames are inserted at the current cursor position:

bind -x '"\C-f":"_skim_insert"'
_skim_insert() {
    local files="$(sk --cmd='rg --files' --multi)"
    if [[ $? -eq 0 ]]; then
        local completions="$(python3 -c 'import sys, shlex; print(" ".join(shlex.quote(a.rstrip("\n")) for a in sys.argv[1].splitlines()))' "$files")"
        READLINE_LINE="${READLINE_LINE:0:$READLINE_POINT}${completions}${READLINE_LINE:$READLINE_POINT}"
        READLINE_POINT=$(( $READLINE_POINT + ${#READLINE_LINE} ))
    fi
}

This one picks a Git commit ID from git log on Ctrl-G:

bind -x '"\C-g":"_git_commit_insert"'
_git_commit_insert() {
    local files="$(sk --cmd='git log --oneline' --multi --reverse)"
    if [[ $? -eq 0 ]]; then
        local completions="$(python3 -c 'import sys, shlex; print(" ".join(shlex.quote(a.split()[0]) for a in sys.argv[1].splitlines()))' "$files")"
        READLINE_LINE="${READLINE_LINE:0:$READLINE_POINT}${completions}${READLINE_LINE:$READLINE_POINT}"
        READLINE_POINT=$(( $READLINE_POINT + ${#READLINE_LINE} ))
    fi
}

Really handy for git commit --fixup!

These examples use Skim instead of fzf. It’s a Rust reimplementation. I use Skim instead of fzf because I can easily cargo install it along with Ripgrep.

Probably not the most efficient way to combine fzf and rg, but I use this function daily:

fo () {
        local file
        if hash rg 2> /dev/null
        then
                file="$(rg --no-line-number --no-heading "" | fzf -0 -1 | awk -F: '{print $1}')"
        else
                file="$(grep --line-buffered --color=never -r "" $@ | fzf -0 -1 | awk -F: '{print $1}')"
        fi
        echo $file
        if [[ -n $file ]]
        then
                $EDITOR $file
        fi
}