#!/bin/bash -e
#
# script/brew_formula_update
# mas
#
# Updates mas Homebrew core formula:
# https://github.com/Homebrew/homebrew-core/blob/master/Formula/mas.rb
#
# brew bump-formula-pr --help
#

CORE_FORMULA_PATH="$(brew --repository homebrew/core)/Formula"

function usage {
  echo "Usage: brew_formula_update [v1.0] [sha1_hash]"
  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
}

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

# arg 2 - revision (commit hash)
if test -n "$2"; then
  REVISION="$2"
else
  REVISION=$(git rev-parse "$MAS_VERSION")
fi

# Force brew to use the local repository instead of the API.
# Disable API before any install, reinstall or upgrade commands.
export HOMEBREW_NO_INSTALL_FROM_API=1

if test ! -f "$CORE_FORMULA_PATH/mas.rb"; then
  brew install mas
fi

echo "Checking to see if this update can be a simple bump."
diff "Homebrew/mas.rb" "$CORE_FORMULA_PATH/mas.rb"

# diff exit status
status=$?
formula_revisions=0
if test $status -ne 0; then
  echo "There are changes in the local formula (Homebrew/mas.rb) that haven't been released yet."
  #exit $status
  formula_revisions=1
fi

echo "==> 🧪 Updating homebrew-core formula mas ($MAS_VERSION, $REVISION)"

echo "Validating formula"
brew bump-formula-pr \
  --tag="$MAS_VERSION" \
  --revision="$REVISION" \
  --strict \
  mas

# brew exit status
status=$?
if test $status -ne 0; then
  echo "Formula did not validate using 'brew bump-formula-pr'"
  exit $status
fi

pushd "$CORE_FORMULA_PATH" || exit 2

echo "Updating formula"
if test $formula_revisions -eq 1; then
  # Options to
  dry_run="--dry-run --write"
fi

brew bump-formula-pr \
  --tag="$MAS_VERSION" \
  --revision="$REVISION" \
  --strict \
  --verbose \
  "$dry_run" \
  mas