action.yml

name: 'Maven Releaser'
description: 'Release maven projects easily using this action'
inputs:
  project-pom-location:  # id of input
    description: '`pom.xml` file location relative to the project root. Default: `./pom.xml`'
    required: false
    default: './pom.xml'
  versioning:  # id of input
    description: 'SemVer versioning - patch, minor, major. Default: `patch`'
    required: false
    default: 'patch'
  github-token:
    description: 'GitHub Token with read/write access'
    required: true
outputs:
  message: # id of output
    description: 'Output message of the release containing information about release or errors if any'
runs:
  using: composite
  steps:
    - shell: bash
      run: |
        git config user.email "actions@github.com"
        git config user.name "GitHub Actions"
    - shell: bash
      run: npm install -g semver
    - shell: bash
      env:
        GITHUB_TOKEN: ${{ inputs.github-token }}
      run: |
        latest_pom_snapshot=$(./mvnw -f ${{inputs.project-pom-location}} help:evaluate -D expression=project.version -q -D forceStdout)
        # remove postfixes (e.g. -snapshot) from dev version
        pom_version=${latest_pom_snapshot%%-*}
        if [[ ${{ inputs.versioning }} == 'patch' ]]; then
          release=$pom_version
        else
          release=$(semver "$pom_version" -i "$VERSIONING")
        fi
        next=$(semver "${release}" -i patch)
        ./mvnw -f ${{inputs.project-pom-location}} scm:check-local-modification
        if [ $? -ne 0 ]; then
          echo "The build will stop as there is local modifications"
        	echo "::set-output name=message::The build will stop as there is local modifications :thinking_face:"
        	exit 1
        fi
        ./mvnw -f ${{inputs.project-pom-location}} versions:set -D newVersion="${release}"
        git commit -am "Release ${release}"
        if [ $? -ne 0 ]; then
        	echo "Commit for preparing release has failed."
        	echo "::set-output name=message::Commit for preparing release has failed :thinking_face:"
        	exit 1
        fi
        ./mvnw -f ${{inputs.project-pom-location}} clean deploy scm:tag -P release \
               -D tag="${release}" \
               -D pushChanges=false \
               -D dependency-check.skip
        if [ $? -ne 0 ]; then
        	echo "Deploy Failed"
        	echo "::set-output name=message::Maven deploy failed :white_frowning_face: "
        	exit 1
        fi
        ./mvnw -f "$project_pom" versions:set -D newVersion="${next}"-SNAPSHOT
        git commit -am "Set development version ${next}-SNAPSHOT"
        git push
        git push --tags
        echo "Release successfully finished."
        echo "::set-output name=message::Release *finished!* :disco: *Repository:* $GITHUB_REPOSITORY *Release Version:* ${release}"