release

#!/bin/bash
set -euo pipefail
IFS=$'\n\t'

# Don't undestand line 2 and 3? Then you should read this: https://dev.to/thiht/shell-scripts-matter

BIN_NAME=$(basename "$0")
COMMAND_NAME=$1

sub_help () {
    echo "Usage: $BIN_NAME <command>"
    echo
    echo "For details about a command, append '--help' to it."
    echo
    echo "Commands:"
    echo "   help               This help message"
    echo "   branch             Creates a release branch"
    echo "   release            Updates the release branch and create a release"
}

branch_help () {
    echo "Usage: $BIN_NAME branch <parameters> -- <components-to-delete>..."
    echo
    echo "Parameters:"
    echo "   -h, --help                  This help message"
    echo "   -n, --name                  Name of the new release branch."
    echo "   -d, --dry-run               Run don't change anything in remote repositories."
    echo "                               But there will be commits in the local repository."
    echo "                               That changes can be discarded by git! If no explicit value is set, then for a"
    echo "                               decision will be asked."
    echo
    echo "Example:"
    echo
    echo "   $BIN_NAME branch --name openls --dry-run true \\"
    echo "     -- bundle/ component/service/ component/webapp/ component/lib/lib-two/ component/lib/lib-three/"
}

release_help () {
    echo "Usage: $BIN_NAME release <parameters>"
    echo
    echo "This command only works if it executed on a release branch. So the branch name must be looks like"
    echo "'release/<component>'."
    echo
    echo "Parameters:"
    echo "   -h, --help                  This help message"
    echo "   -d, --dry-run               Run don't change anything in remote repositories."
    echo "                               But there will be commits in the local repository."
    echo "                               That changes can be discarded by git! If no explicit value is set, then for a"
    echo "                               decision will be asked."
    echo "   -v, --version               Version of the next release, e.g. '1.12.0'."
    echo "                               repository."
    echo
    echo "Example:"
    echo
    echo "   $BIN_NAME release --dry-run false --version 1.2.3"
}

sub_branch () {
  declare -a DELETE_COMPONENTS
  PUSH=0

  # Every 'shift' call shifts all positional parameters down by one. See
  # http://www.linuxcommand.org/wss0130.php for details.
  while [ $# -gt 0 ]; do
    case $1 in
        -n | --name )               shift
                                    BRANCH=$1
                                    ;;
        -- )                        shift
                                    # all parameters after -- must be folders
                                    DELETE_COMPONENTS=( "$@" )
                                    break;
                                    ;;
        -d | --dry-run )            shift
                                    DRY_RUN=$1
                                    ;;
        -h | --help )               branch_help
                                    exit 0
                                    ;;
        * )                         echo "$1 is not a valid parameter"
                                    branch_help
                                    exit 1
    esac
    shift
  done

  # Check if variable BRANCH is set.
  #   https://stackoverflow.com/a/13864829/207596
  if [ -z "${BRANCH+x}" ]; then
      echo "--name must be set"
      exit 1
  fi

  # Check if variable BRANCH is set.
  #   https://stackoverflow.com/a/13864829/207596
  if [ -z "${DELETE_COMPONENTS+x}" ]; then
      echo "No <components-to-delete> are set"
      exit 1
  fi

  # Check if variable DRY_RUN is set.
  #   https://stackoverflow.com/a/13864829/207596
  if [ -z "${DRY_RUN+x}" ]; then
      # Ask if no explicit --dry-run value is set.

      echo "Do you wish to make a dry run?"
      select yn in "Yes" "No"; do
        case $yn in
            Yes ) DRY_RUN=true; break;;
            No ) DRY_RUN=false; break;;
        esac
      done
  fi

  mvn clean
  git branch "release/$BRANCH"
  git checkout "release/$BRANCH"
  # bundle/ component/service/ component/webapp/ component/lib/lib-two/ component/lib/lib-three/
  for i in "${DELETE_COMPONENTS[@]}"
  do
    git rm -r "$i"
  done
  # Generate pom.xml files
  mr/checkout.sh
  sed -i '' 's/^pom.xml$/# pom.xml/' .gitignore
  find . -name pom.xml -type f  -exec chmod u+w {} \;  -exec git add {} \;
  git commit -am "$BRANCH components only"
  if [ $PUSH -eq 1 ]; then
      git push --all
  fi

}

sub_release () {

  # Every 'shift' call shifts all positional parameters down by one. See
  # http://www.linuxcommand.org/wss0130.php for details.
  while [ $# -gt 0 ]; do
    case $1 in
        -d | --dry-run )            shift
                                    DRY_RUN=$1
                                    ;;
        -v | --version )            shift
                                    VERSION=$1
                                    ;;
        -h | --help )               release_help
                                    exit
                                    ;;
        * )                         release_help
                                    exit 1
    esac
    shift
  done

  # If the git branch name is 'release/comp1' the result will be 'comp1'
  BRANCH_NAME=$(git rev-parse --abbrev-ref HEAD)
  COMPONENT=$(git rev-parse --abbrev-ref HEAD | cut -f2 -d/)
  RELEASE=$(git rev-parse --abbrev-ref HEAD | cut -f1 -d/)

  if [ "$RELEASE" != "release" ]; then
      echo "This ($BRANCH_NAME) is not a release branch."
      exit 1
  fi

  # Check if variable COMPONENT is set.
  #   https://stackoverflow.com/a/13864829/207596
  if [ -z "${COMPONENT+x}" ]; then
      echo "This ($BRANCH_NAME) is a release branch, but it's not possible to determine the component name."
      exit 1
  fi

  # Check if variable VERSION is set.
  #   https://stackoverflow.com/a/13864829/207596
  if [ -z "${VERSION+x}" ]; then
      echo "'--version' must be set."
      exit 1
  fi

  # Check if variable DRY_RUN is set.
  #   https://stackoverflow.com/a/13864829/207596
  if [ -z "${DRY_RUN+x}" ]; then
      # Ask if no explicit --dry-run value is set.

      echo "Do you wish to make a dry run?"
      select yn in "Yes" "No"; do
        case $yn in
            Yes ) DRY_RUN=true; break;;
            No ) DRY_RUN=false; break;;
        esac
      done
  fi

  mvn clean
  git pull origin "$BRANCH_NAME"
  set +e
  git merge origin/master
  # Clean up deleted but in master modified files
  git status --porcelain | grep '^DU' | cut -d' ' -f2 | xargs git rm -rf
  set -e
  # Regenerate pom.xml files
  mr/checkout.sh
  # Before running release:prepare, make 'pom.xml' writable. It's only readable by mr/checkout.sh
  find . -name pom.xml -type f  -exec chmod u+w {} \;

  # Replace all HEAD-SNAPSHOT versions by the current release version.
  #
  # Example for release version 1.12.0
  #
  #   <version>HEAD-SNAPSHOT</version> --> <version>1.12.0</version>
  #   <tag>HEAD-SNAPSHOT</tag> --> <tag>1.12.0</tag>
  #
  find . -type f -name pom.xml -exec sed -i.bak -e "s/<version>HEAD\-SNAPSHOT<\/version>/<version>$VERSION<\/version>/" -e "s/<tag>HEAD<\/tag>/<tag>$COMPONENT-$VERSION<\/tag>/" {} \;

  if [ "$DRY_RUN" = true ] ; then
    mvn install
  else
    mvn deploy
  fi

  # It can happen that there is nothing to commit. So ignore the returned status != 0
  # and go on.
  set +e
  git commit -am "🤖 Merge in advance of release $COMPONENT-$VERSION"
  set -e

  git tag "$COMPONENT-$VERSION"

  # Delete file with replaced version
  find . -type f -name pom.xml -delete
  # Get back the original pom.xml files with HEAD-SNAPSHOT
  find . -type f -name pom.xml.bak  -exec rename 's/\.bak$//' "{}" \;

  if [ "$DRY_RUN" = true ] ; then
    echo "🤖 This was an dry run. $COMPONENT-$VERSION was not tagged in the remote repository"
    echo "and not deployed to the artifact server."
  else
    git push origin "$BRANCH_NAME"
    git push origin "$COMPONENT-$VERSION"
  fi
}


if ! [ -z "${MAVEN_SETTINGS+x}" ]; then
    MAVEN_OPTS="${MAVEN_OPTS:-} -Dorg.apache.maven.user-settings=$MAVEN_SETTINGS}"
    export MAVEN_OPTS
fi

case $COMMAND_NAME in
    "" | "-h" | "--help")
        sub_help
        ;;
    *)
        shift
        "sub_${COMMAND_NAME}" "$@"
        if [ $? = 127 ]; then
            echo "'$COMMAND_NAME' is not a known command or has errors." >&2
            sub_help
            exit 1
        fi
        ;;
esac

exit 0