#!/bin/bash

set -e

RELEASE=1.10.0

JAR_NAME="google-java-format-${RELEASE}-all-deps.jar"

RELEASES_URL=https://repo1.maven.org/maven2/com/google/googlejavaformat/google-java-format

JAR_URL="${RELEASES_URL}/${RELEASE}/${JAR_NAME}"

CACHE_DIR="$HOME/.cache/google-java-format-git-pre-commit-hook"

JAR_FILE="$CACHE_DIR/$JAR_NAME"

JAR_DOWNLOAD_FILE="${JAR_FILE}.tmp"

JAR_PGP_ASC_FILE="${JAR_FILE}.asc"

PGP_SIGN_KEY_ID=E77417AC194160A3FABD04969A259C7EE636C5ED

if [[ ! -f "$JAR_FILE" ]]

then

mkdir -p "$CACHE_DIR"

curl -L "$JAR_URL" -o "$JAR_DOWNLOAD_FILE"

# Downloaded from: "${JAR_URL}.asc"

cat >"$JAR_PGP_ASC_FILE" <<EOF

-----BEGIN PGP SIGNATURE-----

iQIzBAABCgAdFiEE53QXrBlBYKP6vQSWmiWcfuY2xe0FAmBk8GgACgkQmiWcfuY2

xe15Ag/+PIPIhwPo5S0eVHsPuaH2F7gmjedJAlO/sP+XksHw3r9kvDHhxhtjzpaB

nVUsj4xSTU/8TcG/GDGCWZPI8eqA+2184Wf+IDzm36oIRCSJwvEBmqCyG/ffxUzl

K2sf8IoptGTWqfZTBu53jskGhVwuV0EqrnxBpaLvNbb019GI20YqcEeVC61f6fje

yGM7MO/bTKtwr3p0GDddmxKghkTr/GQxmRHXH1PY2nyJi51yZnefGA8rXkNGAQnQ

xahvxDWsqipdvokfYEC5LSnRXeB9oMHAsKrWwmlJXpvXS0z56pPqM8wO5OYnssTd

DEVR7w/t4ldXS5Y3SA3B5cdOfUb8CVqzRz9Ht8g3/Pc9JfgRKl3s+JGfj9np41pd

2zBzdY7a+5PjYi08WgVDcQYSuswAM7/71l2tKV88E9dqArPausYatRndvAfKivVF

kUgEFCARhqNFS/8TtC9DPjJc0a2toEyrHurt33jPknfWHM2yhaW2wSfeDagfSHE0

4pbusMBCesRk1lJZdcqNARqOtgfZD3V1J2CQ/3MCqTB0Z+Yzhxya5rLojfXQJNu1

IhVd5OjdmBxL4UHdVLYvlBd16ng91GfsO91aedTL7TOFB9QZm4U35yknFYUcqHlL

RkMpZx8/4hNMT8HicpUjBvF45yNpUL3bix71MJfl4ILG8dRE3ho=

=b349

-----END PGP SIGNATURE-----

EOF

if ! gpg --list-keys "$PGP_SIGN_KEY_ID"

then

gpg --keyserver hkps://keyserver.ubuntu.com --recv-key "$PGP_SIGN_KEY_ID"

fi

gpg --verify "$JAR_PGP_ASC_FILE" "$JAR_DOWNLOAD_FILE"

mv "$JAR_DOWNLOAD_FILE" "$JAR_FILE"

fi

changed_java_files=$(git diff --cached --name-only --diff-filter=ACMR | grep ".*java$" || true)

if [[ -n "$changed_java_files" ]]

then

echo "Reformatting Java files: $changed_java_files"

if ! java -jar "$JAR_FILE" --replace --set-exit-if-changed $changed_java_files

then

echo "Some files were changed, aborting commit!" >&2

exit 1

fi

else

echo "No Java files changes found."

fi