#!/bin/sh

set -eu

WORKDIR="${XDG_CACHE_HOME:-$HOME/.cache}/git-ignore"
URL="https://github.com/github/gitignore.git"

if [ ! -d "$WORKDIR" ]; then
  git clone --quiet --depth 1 "$URL" "$WORKDIR"
else
  git -C "$WORKDIR" pull --quiet
fi

find "$WORKDIR" -maxdepth 1 -type f -name '*gitignore' |
  sed -e "s,^$WORKDIR/\(.*\)\.gitignore$,\1," |
  sort |
  fzf --multi \
    --preview="cat $WORKDIR/{}.gitignore" \
    --bind='ctrl-p:toggle-preview' |
  while read -r lang; do
    echo "############################################################"
    echo "# ${lang}"
    echo "############################################################"
    cat "$WORKDIR/${lang}.gitignore"
    echo
  done