#!/usr/bin/env bash

display_help() {
  cat <<EOF
Installs the git hooks used for development in this repository

Usage:
  $0 [--get-clang-format] [--help] [--] files...

Options:
  --help                      Print this help message.

  --get-clang-format          Download clang-format for use with the hooks.
                              This is an alternative to installing the llvm-amdgpu package.
                              This option may require additional system packages
                              (e.g., wget, binutils, rpm2cpio, or libtinfo5).
EOF
}

# Set defaults
get_clang_format=false

# Check getopt version
getopt -T
if [[ $? -ne 4 ]]; then
  >&2 echo 'getopt version check failed'
  exit 1
fi

# Parse options
GETOPT_PARSE=$(getopt --name "$0" --longoptions help,get-clang-format --options '' -- "$@")
if [[ $? -ne 0 ]]; then
  exit 1
fi
eval set -- "$GETOPT_PARSE"
while true; do
  case "$1" in
    --help)
      display_help
      exit ;;
    --get-clang-format)
      get_clang_format=true
      shift ;;
    --) shift ; break ;;
  esac
done

set -eu

hooks_dir=$(git rev-parse --git-path hooks)
scripts_dir=$(dirname "${BASH_SOURCE[0]}")

install --backup --verbose "$scripts_dir/post-commit" "$hooks_dir"
install --backup --verbose "$scripts_dir/reformat-files" "$hooks_dir"

if [[ "$get_clang_format" == true ]]; then
  "$scripts_dir/get-clang-format" "$hooks_dir"
fi