Github actions for pre merge

pre-merge.yml

# Github actions to run detekt, klint & jacoco on all modules of the project, then build and test the artifacts

name: Pre Merge Checks

# Controls when the action will run. 
on:
  # Triggers the workflow on push or pull request events but only for the master branch
  push:
    branches: [ master ]
  pull_request:
    branches: '.*'


# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
  # This workflow contains a single job called "build"
  gradle:
    strategy:
      matrix:
        os: [macos-latest]
    # The type of runner that the job will run on
    runs-on: ${{ matrix.os }}
    
    if: ${{ !contains(github.event.head_commit.message, 'ci skip') }}

    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      - name: Checkout Repository
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
        uses: actions/checkout@v2

      # Gradle wrapper validation
      - name: Verify the wrapper's checksum
        uses: gradle/wrapper-validation-action@v1.0.3

      # Cache gradle files
      - name: Cache Gradle Files
        uses: actions/cache@v2
        with:
          path: |
            ~/.gradle/caches/
            ~/.gradle/wrapper/
          key: cache-gradle

      # Code Checking
      - name: Check Kotlin code style
        run: ./gradlew ktlintCheck --continue   #Continues task execution after a task failure.

      # Code Formatting
      - name: Fix Kotlin code style deviations
        run: ./gradlew ktlintFormat --continue   #Continues task execution after a task failure.

      # (Basic) Code analysis
      - name: Static code analysis
        run: ./gradlew detekt --continue   #Continues task execution after a task failure.

      # End Gradle tasks
      - name: Build artifacts and publish to local maven
        run: ./gradlew build check publishToMavenLocal --continue

      # Stop gradle
      - name: Stop Gradle
        run: ./gradlew --stop