#!/bin/bash -e
#
# script/brew_tap_update
# mas
#
# Updates mas custom tap formula:
# https://github.com/mas-cli/homebrew-tap/blob/main/Formula/mas.rb
#

MAS_TAP_PATH="$(brew --repository mas-cli/tap)"
MAS_TAP_PATH_FORMULA="${MAS_TAP_PATH}/Formula/mas.rb"

PROJECT_PATH="$(git rev-parse --show-toplevel)"
LOCAL_TAP_FORMULA_PATH="${PROJECT_PATH}/Homebrew/mas-tap.rb"

function usage {
  echo "Usage: brew_tap_update [-d] v0.0 [sha1_hash]"
  echo "  -d option enables dry run mode"
  echo "  version will be inferred using version script if not provided"
  echo "  sha will be inferred from the current commit if not provided"
  exit 1
}

# Max 3 arguments
if [[ $# -gt 3 ]]; then
  usage 1>&2
fi

echo=''
dry_run=''

# Detect presence of `-d` dry run option
while getopts "d" o; do
  case "${o}" in
    d)
      echo='echo (DRY-RUN):'
      dry_run='-d'
      ;;
    *)
      usage 1>&2
      ;;
  esac
done
shift $((OPTIND-1))

# DRY_RUN environment variable
# shellcheck disable=SC2153
if [[ $DRY_RUN == 'true' ]]; then
  echo='echo (DRY-RUN):'
  dry_run='-d'
fi

# arg 1 - version tag
if [[ -n "${1}" ]]; then
  MAS_VERSION="${1}"
else
  MAS_VERSION="v$(script/version)"
fi

echo "MAS_VERSION: ${MAS_VERSION}"

# arg 2 - revision (commit hash)
if [[ -n "${2}" ]]; then
  REVISION="${2}"
else
  # Derive revision from version. Fails if MAS_VERSION is not a tag.
  REVISION=$(git rev-parse "${MAS_VERSION}")
fi

echo "REVISION: ${REVISION}"

################################################################################
#
# Update Version
#

branch_name="releases/release-${MAS_VERSION}"
$echo git switch "${branch_name}"

################################################################################
#
# Create pr on mas-cli/homebrew-tap
#

# Ensure mas is tapped
if ! [[ -d "${MAS_TAP_PATH}" ]]; then
  brew tap mas-cli/tap
fi

pushd "${MAS_TAP_PATH}"

branch_name="releases/release-${MAS_VERSION}"
$echo git branch "${branch_name}"
$echo git switch "${branch_name}"

# Update tap formula version
cp -v "${LOCAL_TAP_FORMULA_PATH}" "${MAS_TAP_PATH_FORMULA}"

$echo git add \
  "${MAS_TAP_PATH_FORMULA}"

$echo git commit --message="🔖 Version ${MAS_VERSION}"

$echo gh pr create \
  --assignee phatblat \
  --base main \
  --draft \
  --fill

popd