travis_automerge_to_jdi_light.sh

#!/bin/bash -v
export GIT_COMMITTER_EMAIL='travis%40travis'
export GIT_COMMITTER_NAME='Travis CI'

# VARIABLES
# Feel free to edit if your directory names or branches differ
TEST_SITE_DIR="$(pwd)"
ANGULAR_SITE_DIR="angular-site"
JDI_LIGHT_GITHUB_REPO="jdi-testing/jdi-light"
PUSH_URI="https://${GIT_COMMITTER_EMAIL}:${GITHUB_TOKEN}@github.com/${JDI_LIGHT_GITHUB_REPO}"
JDI_LIGHT_BRANCH=${TARGET_JDI_LIGHT_BRANCH}
JDI_LIGHT_ANGULAR_DIR="angular"
# FILES_TO_EXCLUDE=( "3rdpartylicenses.txt" "index.html" ) #todo this declaration fails


# Start
LAST_MERGED_PR="[Travis automerge from test-site] $(hub pr list -s merged -L 1 | sed "s/'//g" | xargs)"
GIT_COMMIT_MSG="$(git show -s --format='[test-site#%h] %s')"
BRANCH_TO_MERGE="$(git show -s --format='test-site#%h')"

# Perform npm install in angular-site if not done yet
cd "${TEST_SITE_DIR}/${ANGULAR_SITE_DIR}"
([ ! -d "node_modules" ] && printf "\nPerforming npm install\n" && npm install)

# Build angular-site
printf "\nPerforming ng-build\n"
ng build --prod

BUILD_EXIT_STATUS=$?
if [ $BUILD_EXIT_STATUS -eq 0 ]
then
  # Clone jdi-light and checkout the required branch
  printf "\nChecking out ${JDI_LIGHT_GITHUB_REPO}\n"
  REPO_TEMP="$(mktemp -d)"
  git clone "https://github.com/${JDI_LIGHT_GITHUB_REPO}" "${REPO_TEMP}"
  cd "${REPO_TEMP}"
  git remote set-url origin "${PUSH_URI}"

  printf "\nSwitching to ${JDI_LIGHT_BRANCH}\n"
  git checkout "${JDI_LIGHT_BRANCH}"
  git branch "${BRANCH_TO_MERGE}"
  git checkout "${BRANCH_TO_MERGE}"

  # Copy the required files
  printf "\nCopying the built files from ${ANGULAR_SITE_DIR}/dist/my-app/ to jdi-light/${JDI_LIGHT_ANGULAR_DIR}\n"
  rm -rf "${REPO_TEMP}/${JDI_LIGHT_ANGULAR_DIR}/*"
  cp -R "${TEST_SITE_DIR}/${ANGULAR_SITE_DIR}/dist/my-app/." "${REPO_TEMP}/${JDI_LIGHT_ANGULAR_DIR}/"

  # These files are not needed. See beginning of script to find out why we don't iterate through an array here
  rm -rf "${REPO_TEMP}/${JDI_LIGHT_ANGULAR_DIR}/3rdpartylicenses.txt"
  rm -rf "${REPO_TEMP}/${JDI_LIGHT_ANGULAR_DIR}/index.html"

  # Let's move to our jdi-light dir now
  cd "${REPO_TEMP}"

  # Exclude angular-generated .js file from codacy review scope:
  ([ ! -f .codacy.yaml ] &&
    printf "\nCreating .codacy.yaml file\n" &&
    printf "exclude_paths:\n  - '${JDI_LIGHT_ANGULAR_DIR}/*.js'\n" > "${REPO_TEMP}/.codacy.yaml" &&
    git add .codacy.yaml)

  # Add all new files to git
  git add --all

  # Detect if there are any changes
  printf "\nChanges made since ${JDI_LIGHT_BRANCH} was checked out:\n"
  git update-index --refresh
  git diff-index --name-status HEAD
  printf "End of list\n"

  # This would stop the execution in case there is nothing to commit
  git diff-index --quiet HEAD && exit 0 || printf "There are changes to be committed\n"

  # Commit
  printf "\nCommitting changes to ${BRANCH_TO_MERGE} branch of ${JDI_LIGHT_GITHUB_REPO}:\n"
  git commit -a -m "${GIT_COMMIT_MSG}"
  git status

  # Push to a new branch of jdi-light
  printf "\nPushing to ${BRANCH_TO_MERGE} of ${JDI_LIGHT_GITHUB_REPO}:\n"
  git push origin "${BRANCH_TO_MERGE}"

  # Create a pull request using hub
  printf "\nCreating a pull request from ${BRANCH_TO_MERGE} to ${JDI_LIGHT_BRANCH}:\n"
  PR_URL=$(hub pull-request --base "${JDI_LIGHT_BRANCH}" --head "${BRANCH_TO_MERGE}" --message "${LAST_MERGED_PR}")

  printf "Following pull request has been created: ${PR_URL}\n"
  PR_NUMBER=$(echo "${PR_URL}" | sed 's/[^0-9]*//g')

  # Attempts to squash merge the request (merge_method=squash).
  # GITHUB_TOKEN must belong to user that has permission to push into BRANCH_TO_MERGE
  printf "\nMerging pull request #${PR_NUMBER}:\n"
  hub api -XPUT "repos/jdi-testing/jdi-light/pulls/${PR_NUMBER}/merge"\
    -f merge_method=squash -f commit_title='Automerged by Travis job'

  # Remove the created branch after it was merged
  git push origin --delete "${BRANCH_TO_MERGE}"
else
  printf "\n'ng build --prod' command exit status was $BUILD_EXIT_STATUS\n"
  exit $BUILD_EXIT_STATUS
fi
printf "\n\nEnd of script\n"