Concourse Pipeline with Semantic Versioning (SemVer)

• code-repo - repo with the code to build and test
• artifact - s3 location to which a built tarball will go
• version - s3 file containing the version number associated with the code

This pipeline

• "performs a build" and, if the build is successful, the pipeline bumps its patch-level semver number
• creates a tarball with the build artifact and includes the semver in the name
• uploads the resulting tarball to S3

resources:
  - name: version
    type: semver
    source:
      driver: s3
      initial_version: 0.0.0
      access_key_id: ((aws_access))
      secret_access_key: ((aws_secret))
      bucket: trullla-artifacts
      key: semver-example/version

  - name: code-repo
    type: git
    source:
      branch: master
      private_key: ((deploy_key))
      uri: git@gitlab.com:myrepo/ci-repo.git

  - name: artifact
    type: s3
    source:
      access_key_id: ((aws_access))
      secret_access_key: ((aws_secret))
      bucket: trullla-artifacts
      regexp: mypackage/mypackage-(.*).tar.gz
      region_name: ((aws_region))

jobs:
  - name: build
    plan:
    - get: code-repo
    - get: version
      params:
        bump: patch
    - task: build
      config:
        platform: linux
        image_resource:
          type: docker-image
          source:
            repository: alpine
        params:
          PACKAGE_NAME: mypackage
        inputs:
          - name: code-repo
          - name: version
        run:
          path: /bin/sh
          args:
          - -c
          - |
            set -e
            cd code-repo
              # do the building, e.g.
              mkdir build
              touch build/output
            cd -

    - put: version
      params: {file: version/version}


  - name: package
    plan:
    - get: version
      passed: [ build ]
    - get: code-repo
      trigger: true
      passed: [ build ]
    - task: build
      config:
        platform: linux
        image_resource:
          type: docker-image
          source:
            repository: alpine
        params:
          PACKAGE_NAME: mypackage
        inputs:
          - name: code-repo
          - name: version
        outputs:
          - name: tarball
        run:
          path: /bin/sh
          args:
          - -c
          - |
            set -e
            VERSION="$(cat version/version)"
            PACKAGE="${PACKAGE_NAME}-${VERSION}"
            cd code-repo
              # do the building, e.g.
              mkdir build
              cp *.* build
            cd -
            cp -a code-repo/build "${PACKAGE}"
            tar czf tarball/"${PACKAGE}.tar.gz" "${PACKAGE}"
    - put: artifact
      params:
        file: tarball/*.tar.gz