#!/bin/bash
#
# Copyright 2018-present The Material Components for iOS Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Fail on any error.
set -e

# The tagged version of https://github.com/material-foundation/clang-format-ci to check out.
# A * wildcard can be used to check out the latest release of a given version.
CLANG_FORMAT_CI_VERSION="v1.*"

CLANG_FORMAT_CI_SRC_DIR=".clang-format-ci-src"

# Will run git clang-format on the branch's changes, reporting a failure if the linter generated any
# stylistic changes.
#
# For local runs, you must set the following environment variables:
#
#   GITHUB_API_TOKEN -> Create a token here: https://github.com/settings/tokens.
#                       Must have public_repo scope.
#   KOKORO_GITHUB_PULL_REQUEST_NUMBER="###" -> The PR # you want to post the API diff results to.
#   KOKORO_GITHUB_PULL_REQUEST_COMMIT="..." -> The PR commit you want to post to.
#
# And install the following tools:
#
# - clang-format
# - git-clang-format
lint_clang_format() {
  if [ ! -d "$CLANG_FORMAT_CI_SRC_DIR" ]; then
    git clone --recurse-submodules https://github.com/material-foundation/clang-format-ci.git "$CLANG_FORMAT_CI_SRC_DIR"
  fi

  pushd "$CLANG_FORMAT_CI_SRC_DIR"
  git fetch > /dev/null
  TAG=$(git tag --sort=v:refname -l "$CLANG_FORMAT_CI_VERSION" | tail -n1)
  git checkout "$TAG" > /dev/null
  git submodule update --init --recursive
  echo "Using clang-format-ci $TAG"
  popd

  .clang-format-ci-src/from-kokoro.sh "material-components/material-components-ios"
}

lint_clang_format