Test, Build, Deploy Jar on Heroku using Clojure + Deps

deps-deploy-heroku.yml

name: Deploy

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

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

jobs:

  run_tests:

    strategy:
      matrix:
        namespace: [ unit, integration ]
        operating-system: [ubuntu-latest]

    runs-on: ${{ matrix.operating-system }}

    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Prepare java
        uses: actions/setup-java@v2.1.0
        with:
          distribution: 'adopt'
          java-version: '11'

      - name: Install clojure tools-deps
        uses: DeLaGuardo/setup-clojure@master
        with:
          tools-deps: 1.10.3.882

      - name: Cache Maven packages
        uses: actions/cache@v2.1.6
        with:
          path: ~/.m2
          key: ${{ runner.os }}-m2-${{ hashFiles('**/deps.edn') }}
          restore-keys: ${{ runner.os }}-m2

      - name: Execute clojure code
        run: clojure -M:test ${{ matrix.namespace }}

  build_jar:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Prepare java
        uses: actions/setup-java@v2.1.0
        with:
          distribution: 'adopt'
          java-version: '11'

      - name: Install clojure tools-deps
        uses: DeLaGuardo/setup-clojure@master
        with:
          tools-deps: 1.10.3.882

      - name: Cache Maven packages
        uses: actions/cache@v2.1.6
        with:
          path: ~/.m2
          key: ${{ runner.os }}-m2-${{ hashFiles('**/deps.edn') }}
          restore-keys: ${{ runner.os }}-m2

      - name: Generate uberjar
        run: clojure -X:uberjar

      - name: Upload uberjar artifact
        uses: actions/upload-artifact@v2
        with:
          name: built-uberjar
          path: service.jar
          retention-days: 1

  deploy:
    runs-on: ubuntu-latest
    needs: [run_tests, build_jar]

    steps:
    - name: Download uberjar artifact
      uses: actions/download-artifact@v2
      with:
        name: built-uberjar

    - name: Heroku login credentials
      run: |
        cat > ~/.netrc <<EOF
          machine api.heroku.com
            login $HEROKU_EMAIL
            password $HEROKU_API_KEY
          machine git.heroku.com
            login $HEROKU_EMAIL
            password $HEROKU_API_KEY
        EOF
      env:
        HEROKU_API_KEY: ${{ secrets.HEROKU_API_KEY }}
        HEROKU_EMAIL: ${{ secrets.HEROKU_EMAIL }}

    - name: Heroku CLI Plugin for Java
      run: heroku plugins:install java

    - name: Heroku Deploy jar
      run: heroku deploy:jar service.jar --app $HEROKU_APP_NAME
      env:
        HEROKU_APP_NAME: ${{ secrets.HEROKU_APP_NAME }}

deps.edn

{:paths ["src" "resources"]
 :deps {org.clojure/clojure {:mvn/version "1.10.3"}}
 :aliases
 {:test {:extra-paths ["test"]
         :extra-deps  {lambdaisland/kaocha {:mvn/version "1.0.861"}}
         :main-opts   ["-m" "kaocha.runner"]}
  
  :uberjar {:replace-deps {com.github.seancorfield/depstar {:mvn/version "2.1.245"}}
            :exec-fn hf.depstar/uberjar
            :exec-args {:jar "service.jar"
                        :aot true
                        :main-class microservice-boilerplate.server}}}}

tests.edn

#kaocha/v1
 {:tests   [{:id         :unit
             :test-paths ["test/unit"]}
            {:id         :integration
             :test-paths ["test/integration"]}]
  :reporter kaocha.report/tap}

Sources:

• https://remarkablemark.org/blog/2021/03/12/github-actions-deploy-to-heroku
• https://github.com/heroku/plugin-java#executable-jar-files