gsel

#!/usr/bin/env bash
# gsel - grep and select
#
# TODO: would be nice to open the selected files at the according position. However, vim 8 does not
# support opening several files at custom lines out of the box.
#
# author: andreasl

show_help() {
    script_name="${0##*/}"

    msg="${script_name}\n"
    msg+="Select some of the output of grep with the given parameters and open the according files"
    msg+=" in vim.\n"
    msg+="\n"
    msg+="Usage:\n"
    msg+="  ${script_name} <search-pattern>\n"
    msg+="\n"
    msg+="Examples:\n"
    msg+="  ${script_name} '2019'       # find & select files that contain '2019'\n"
    msg+="  ${script_name} '# TODO'     # find & select files that contain '# TODO'\n"
    msg+="  ${script_name} -h           # print the usage message\n"
    msg+="  ${script_name} --help       # print the usage message\n"
    printf "$msg"
}
[[ "$1" =~ ^(-h|--help)$ ]] && {
    show_help
    exit
}

grep_cmd='rg -LSn --hidden --no-heading --no-ignore --color=always'
bat_cmd="$(command -v batcat || command -v bat)" # `batcat` on Debian/Ubuntu, `bat` elsewhere
# manually cut; fzf can nicely --delimit similar to `cut`, but fails with file names that have leading & trailing spaces
# shellcheck disable=SC2016  # `$f` must stay unexpanded here; fzf expands it when running the preview
preview_cmd='f="$(printf "%s" {} | cut -d: -f1)"; '"$bat_cmd"' --color=always --style=header,numbers -H{2} --line-range={2}: "$f"'
selections_str="$($grep_cmd "$*" | fzf -m --ansi --delimiter=: --preview="$preview_cmd" | cut -d: -f1)"
[ -n "$selections_str" ] && {
    selections=()
    while IFS= read -r selection; do
        selections+=("$selection")
    done <<<"$selections_str"
    vim -p "${selections[@]}"
}