.kokoro

#!/bin/bash
#
# Copyright 2017-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
COCOAPODS_VERSION="1.6.0"

# Fix permissions issue with Ruby Gems (b/128326105)
if [ -n "$KOKORO_BUILD_NUMBER" ]; then
  sudo chown -Rh $(whoami) /Library/Ruby/Gems
fi

if [ -n "$KOKORO_BUILD_NUMBER" ]; then
  repo_dir='github/repo'
else
  repo_dir="$(dirname $0)"
fi

repo_dir="$(cd $repo_dir; pwd)"
scripts_dir="${repo_dir}/scripts/lib"

source "${scripts_dir}/github_comments.sh"
source "${scripts_dir}/select_xcode.sh"
source "${scripts_dir}/package_managers.sh"

# To install homebrew formulas at specific versions we need to point directly
# to the desired sha in the homebrew formula repository.
# See https://danepowell.com/blog/homebrew-formula-versions for more details.
# This currently points to version 0.21.3, the last version that supports Xcode 9
SOURCEKITTEN_FORMULA="https://raw.githubusercontent.com/Homebrew/homebrew-core/c5a8a094f9e1dd8e41ed24785acef07ef7092d0d/Formula/sourcekitten.rb"

move_derived_data_to_tmp() {
  targetDir="${HOME}/Library/Developer/Xcode/DerivedData"
  if [[ -d "$targetDir" ]]; then
    mv "$targetDir" /tmpfs/
    ln -sf /tmpfs/DerivedData "$targetDir"
  fi
}

run_cocoapods() {
  echo "Running cocoapods builds..."

  if [ -n "$KOKORO_BUILD_NUMBER" ]; then
    move_derived_data_to_tmp
  fi

  if [ -n "$KOKORO_BUILD_NUMBER" ]; then
    select_xcode "$XCODE_VERSION"

    # Move into our cloned repo
    cd github/repo

    gem_install xcpretty 
    # TODO(https://github.com/material-components/material-components-ios/issues/6356 ): Move to 1.6
    gem install cocoapods -v "$COCOAPODS_VERSION"
    pod --version

    # Install git-lfs
    brew_install git-lfs
    git lfs install
    git lfs pull
  fi

  if [ "$DEPENDENCY_SYSTEM" = "cocoapods" ]; then
    bash scripts/prep_all
    bash scripts/build_all --verbose
    if [ -n "$IS_RELEASE" ]; then
      bash scripts/test_all
    else
      bash scripts/test_all catalog/MDCCatalog.xcworkspace:MDCCatalog
    fi
  elif [ "$DEPENDENCY_SYSTEM" = "cocoapods-podspec" ]; then
    pod lib lint MaterialComponents.podspec --skip-tests
  fi

  if [ -n "$CODECOV_TOKEN" ]; then
    bash <(curl -s https://codecov.io/bash)
  fi
}

# For local runs, you must set the following environment variables:
#
#   DANGER_GITHUB_API_TOKEN -> Create a token here: https://github.com/settings/tokens.
#                              Must have public_repo scope.
#   DANGER_TEST_PR="###"    -> The PR # you want to test danger against.
#
# And you'll likely have to install danger:
#
#   yarn add danger
#
run_danger() {
  if [ -n "$KOKORO_BUILD_NUMBER" ]; then
    # Move into our cloned repo
    cd github/repo

    export DANGER_TEST_PR="$KOKORO_GITHUB_PULL_REQUEST_NUMBER"

    # Install danger
    yarn add danger
  fi

  # We're not a supported CI, so we have to pretend to be one.
  export DANGER_FAKE_CI="YEP"
  export DANGER_TEST_REPO="material-components/material-components-ios"

  # Run Danger
  yarn danger ci
}

generate_website() {
  if [ -n "$KOKORO_BUILD_NUMBER" ]; then
    # Move into our cloned repo
    cd github/repo

    ./scripts/build_site.sh

    gem_install bundler
    brew_install yarn --ignore-dependencies
    
    # The above installations update node to v10, but the docsite generator
    # relies on v8.
    brew unlink node
    brew_install node@8
    # Required because node@8 is keg-only, meaning it isn't linked automatically.
    brew link --force --overwrite node@8
  fi

  cd docsite-generator
  bundle install
  yarn install
  cd ../

  TMP_PATH=$(mktemp -d)
  ./scripts/build_site.sh 2>&1 | tee "$TMP_PATH/output"

  if [[ $(grep "^Error:" "$TMP_PATH/output") ]]; then
    # Make site generation errors be script failures. build_site.sh always exits with 0
    # unfortunately.
    exit 1
  fi
}

# Will generate an API diff between the current branch and the merge-base from develop.
# The result will be posted to GitHub as a comment.
#
# 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.
#
# And you'll likely have to install sourcekitten:
#
#   brew install sourcekitten
#
generate_apidiff() {
  if [ -n "$KOKORO_BUILD_NUMBER" ]; then
    select_xcode "$XCODE_VERSION"

    # Move into our cloned repo
    cd github/repo

    # Install sourcekitten, a dependency of the apidiff tool
    brew_install "$SOURCEKITTEN_FORMULA"

    sourcekitten version
  fi

  usage() {
    echo "Usage: $0 -d apidiff"
    echo
    echo "Will generate an API diff between the current branch and the merge-base from develop."
    echo "The result will be posted to GitHub as a comment."
    echo
    echo "Must set the following environment variables to run locally:"
    echo
    echo "GITHUB_API_TOKEN -> Create a token here: https://github.com/settings/tokens."
    echo "                    Must have public_repo scope."
    echo "KOKORO_GITHUB_PULL_REQUEST_NUMBER=\"###\" -> The PR # you want to post the API diff results to."
  }

  if [ -z "$GITHUB_API_TOKEN" ]; then
    echo "GITHUB_API_TOKEN must be set to a github token with public_repo scope."
    usage
    exit 1
  fi

  if [ -z "$KOKORO_GITHUB_PULL_REQUEST_NUMBER" ]; then
    echo "KOKORO_GITHUB_PULL_REQUEST_NUMBER must be set to a github pull request number."
    usage
    exit 1
  fi

  BUILDS_TMP_PATH=$(mktemp -d)
  base_sha=$(git merge-base origin/develop HEAD)

  ./scripts/release apidiff "$base_sha" | tee "$BUILDS_TMP_PATH/api_diff"
  changelog_path=$(cat "$BUILDS_TMP_PATH/api_diff" | grep "Changelog=" | cut -d'=' -f2)
  error_path=$(cat "$BUILDS_TMP_PATH/api_diff" | grep "Errors=" | cut -d'=' -f2)

  if [ ! -f scripts/external/github-comment/.git ]; then
    git submodule update --init --recursive scripts/external/github-comment
  fi

  pushd scripts/external/github-comment >> /dev/null

  if [ -f "$changelog_path" ]; then
    echo "## API diff detected the following changes" > "$changelog_path.tmp"
    cat "$changelog_path" >> "$changelog_path.tmp"

    swift run github-comment \
      --repo=material-components/material-components-ios \
      --github_token="$GITHUB_API_TOKEN" \
      --pull_request_number="$KOKORO_GITHUB_PULL_REQUEST_NUMBER" \
      --identifier=apidiff \
      --comment_body="$changelog_path.tmp"

  else
    # No changelog, so delete any existing comment
    swift run github-comment \
      --repo=material-components/material-components-ios \
      --github_token="$GITHUB_API_TOKEN" \
      --pull_request_number="$KOKORO_GITHUB_PULL_REQUEST_NUMBER" \
      --identifier=apidiff \
      --delete
  fi

  popd >> /dev/null

  if [ -f "$error_path" ]; then
    nested_error_path=$(cat "$error_path" | grep "stderr output is available in" | cut -d' ' -f6)
    if [ -f "$nested_error_path" ]; then
      echo
      echo "Potential build errors:"
      cat "$nested_error_path"
    fi
  fi
}

# This command can be used when a pull request should always be put into a failure state.
# For example, we do not want to allow pull requests to be merged into stable.
fail_immediately() {
  exit 1
}

# This command protects the stable branch from being merged with anything other than
# release-candidate branches.
protect_stable_from_undesired_merges() {
  if [ -z "$KOKORO_GITHUB_PULL_REQUEST_NUMBER" ]; then
    echo "KOKORO_GITHUB_PULL_REQUEST_NUMBER has not been defined."
    echo "Please set this variable to a valid GitHub pull request number."
    exit 1
  fi

  pull_request_api_url="https://api.github.com/repos/material-components/material-components-ios/pulls/$KOKORO_GITHUB_PULL_REQUEST_NUMBER"

  tmp_path=$(mktemp -d)
  pull_request_metadata_file="$tmp_path/output"

  curl -s "$pull_request_api_url" > "$pull_request_metadata_file"

  if ! grep --quiet '^    "label": "material-components:stable",$' "$pull_request_metadata_file"; then
    echo "This job should only be used to validate pull requests to stable."
    exit 1;
  fi

  if ! grep --quiet '^    "label": "material-components:release-candidate",$' "$pull_request_metadata_file"; then
    echo "Only release-candidate branches can be merged into stable."
    exit 1;
  fi

  echo "Validated that this branch is a release-candidate being merged in to stable."
}

# The fall-through case for unknown jobs.
unknown_job() {
  if [ -n "$DEPENDENCY_SYSTEM" ]; then
    echo "The following job is unknown and will not be run: $DEPENDENCY_SYSTEM"
  else
    echo "You must provide a depenency system with '-d' or the environment "
    echo "variable 'DEPENDENCY_SYSTEM'."
  fi
  exit 1
}

POSITIONAL=()
while [[ $# -gt 0 ]]; do
  key="$1"

  case $key in
  -v|--verbose)
    VERBOSE_OUTPUT="1"
    shift
    ;;
  -d|--dependency_system)
    DEPENDENCY_SYSTEM="$2"
    shift
    shift
    ;;
  -c|--command)
    COMMAND="$2"
    shift
    shift
    ;;
  -t|--target)
    TARGET="$2"
    shift
    shift
    ;;
  *)
    POSITIONAL+=("$1")
    shift
    ;;
  esac
done
set -- "${POSITIONAL[@]}" # restore positional parameters

if [ -n "$VERBOSE_OUTPUT" ]; then
  # Display commands to stderr.
  set -x
fi

case "$DEPENDENCY_SYSTEM" in
  "cocoapods")  run_cocoapods ;;
  "cocoapods-podspec")  run_cocoapods ;;
  "website")    generate_website ;;
  "danger")     run_danger ;;
  "apidiff")    generate_apidiff ;;
  "fail")       fail_immediately ;;
  "protect-stable-from-undesired-merges") protect_stable_from_undesired_merges ;;

  *)            unknown_job ;;
esac

echo "Success!"