kamp-grep

#!/bin/sh
#
# Open files by content.
#
# requires:
# – fzf (https://github.com/junegunn/fzf)
  # https://github.com/junegunn/fzf/blob/master/CHANGELOG.md#0190
# – ripgrep (https://github.com/BurntSushi/ripgrep)
  # 'rg --no-heading --with-filename' are defaults when not printing to a terminal
  # 'rg --column' implies --line-number
# - bat (https://github.com/sharkdp/bat)

set -euf

# define SHELL so --preview arguments do not error if current SHELL is not POSIX
SHELL=/bin/sh

usage() {
    printf "Usage: %s: [-q query] -- [rg_options]\n" "$(basename "$0")" >&2
    exit 2
}

qflag=
while getopts 'q:h' OPTION; do
    case $OPTION in
    q)
        qflag=1
        query="$OPTARG"
        ;;
    h|?)
        usage
        ;;
    esac
done
shift $((OPTIND - 1))

rg_cmd="rg --color always --column $*"

if [ ! "$qflag" ]; then
    query="$(kamp get opt kamp_grep_query)"
fi

if [ -z "$query" ]; then
    export FZF_DEFAULT_COMMAND="rg --files $*"
else
    pattern=$(printf %s "$query" | sed 's/"/\\"/')
    export FZF_DEFAULT_COMMAND="$rg_cmd -- \"$pattern\""
fi

fzf \
  --phony \
  --query "$query" \
  --delimiter ':' \
  --ansi \
  --bind "change:reload($rg_cmd -- {q} || true)" \
  --bind 'enter:execute-silent(kamp send set global kamp_grep_query {q})+become(kamp edit {1} +{2}:{3})' \
  --preview '
      highlight_line={2}
      line_range_begin=$((highlight_line - FZF_PREVIEW_LINES / 2))
      bat \
        --terminal-width $FZF_PREVIEW_COLUMNS \
        --style=numbers \
        --color=always \
        --line-range "$((line_range_begin < 0 ? 1 : line_range_begin)):+$FZF_PREVIEW_LINES" \
        --highlight-line {2} {1} 2> /dev/null' \
  --header 'type to grep' \
  --prompt 'grep> '