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() {
    # passing -F to rg_options implies it must be last in the sequence;
    # otherwise switching between fixed/regex mode will fail
    printf "Usage: %s: [-q query] -- [rg_options]\n" "$(basename "$0")" >&2
    exit 2
}

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

ctrlx_bind=
case "$*" in
    *-F)
        ctrlx_bind="ctrl-x:become:$0 -q {q} -- ${*%-F*}"
        ;;
    *)
        ctrlx_bind="ctrl-x:become:$0 -q {q} -- $* -F"
        ;;
esac

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

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

if [ -z "$query" ]; then
    export FZF_DEFAULT_COMMAND="rg --files $*"
elif printf %q > /dev/null 2>/dev/null; then
    export FZF_DEFAULT_COMMAND="$(printf '%s -- %q' "$rg_cmd" "$query")"
else
    # printf doesn't support %q fallback instead of failure
    qq=$(echo "$query" | sed 's/"/\\"/g')
    export FZF_DEFAULT_COMMAND="$rg_cmd -- \"$qq\""
fi

fzf \
  --disabled --ansi \
  --delimiter : \
  --query "$query" \
  --prompt "rg($*)> " \
  --header '<c-x> toggle fixed/regex mode' \
  --bind "$ctrlx_bind" \
  --bind "change:reload:$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'