release.yml

name: Release

on:
  workflow_dispatch:
    inputs:
      releaseType:
        type: choice
        options:
          - major
          - minor
          - patch
        default: minor
        required: true
        description: 'major: vX.0.0, minor: v0.X.0, patch: v0.0.X'
      debug:
        type: boolean
        default: true
        description: 'executes the workflow in debug mode (skip the publishing tag, docker image and release steps)'

jobs:
  check-permission:
    name: Check permission
    if: contains(github.ref, 'refs/heads/master')
    runs-on: ubuntu-latest
    permissions:
      contents: read
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          repository: ${{ github.repository }}
          ref: master
      - name: Check user permission
        uses: actions/github-script@v7
        id: check
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          result-encoding: string
          script: |
            const utils = require('./.github/workflows/helpers/pull-request-utils.js')
            const helper = utils.userHelper({github, context, user: '${{ github.actor }}'})
            const hasPermission = await helper.hasWritePermissions()
            return hasPermission
    outputs:
      hasWritePermission: ${{ steps.check.outputs.result }}

  build-master:
    name: Build master
    needs: check-permission
    if: contains(needs.check-permission.outputs.hasWritePermission, 'true')
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          repository: ${{ github.repository }}
          ref: master
      - name: Build and validate
        run: |
          ./validate.sh

  publish-tag:
    name: Publish tag
    needs: build-master
    permissions:
      contents: write
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Prebid Server
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - name: Create & publish tag
        id: release
        run: |
          currentTag=$(git describe --abbrev=0 --tags)
          echo "Current release tag ${currentTag}"

          echo ${currentTag} | grep -q "^v\?[0-9]\+\.[0-9]\+\.[0-9]\+$"
          if [ $? -ne 0 ]; then
            echo "Current tag format won't let us compute the new tag name. Required format v[0-9]\+\.[0-9]\+\.[0-9]\+"
            exit 1
          fi

          if [[ "${currentTag:0:1}" != "v" ]]; then
            currentTag="v${currentTag}"
          fi

          nextTag=''
          releaseType=${{ inputs.releaseType }}
          if [ $releaseType == "major" ]; then
              # PBS-GO skipped the v1.0.0 major release - https://github.com/prebid/prebid-server/issues/3068
              # If the current tag is v0.x.x, the script sets the next release tag to v2.0.0
              # Otherwise, the script increments the major version by 1 and sets the minor and patch versions to zero
              # For example, v2.x.x will be incremented to v3.0.0
              major=$(echo "${currentTag}" | awk -F. '{gsub(/^v/, "", $1); if($1 == 0) $1=2; else $1+=1; print $1}')
              nextTag="v${major}.0.0"
          elif [ $releaseType == "minor" ]; then
              # Increment minor version and reset patch version
              nextTag=$(echo "${currentTag}" | awk -F. '{OFS="."; $2+=1; $3=0; print $0}')
          else
            # Increment patch version
            nextTag=$(echo "${currentTag}" | awk -F. '{OFS="."; $3+=1; print $0}')
          fi

          if [ ${{ inputs.debug }} == 'true' ]; then
            echo "running workflow in debug mode, next ${releaseType} tag: ${nextTag}"
          else
            git tag $nextTag
            git push origin $nextTag
            echo "tag=${nextTag}" >> $GITHUB_OUTPUT
          fi
    outputs:
      releaseTag: ${{ steps.release.outputs.tag }}

  publish-docker-image:
    name: Publish docker image
    needs: publish-tag
    if: contains(inputs.debug, 'false')
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Prebid Server
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - name: Build image
        run: |
          docker build -t docker.io/prebid/prebid-server:${{ needs.publish-tag.outputs.releaseTag }} .
      - name: Login to docker Hub
        if: contains(inputs.debug, 'false')
        uses: docker/login-action@v2.1.0
        with:
          username: ${{ secrets.DOCKERHUB_USER }}
          password: ${{ secrets.DOCKERHUB_PASSWORD }}
      - name: Publish to docker Hub
        run: |
          docker push docker.io/prebid/prebid-server:${{ needs.publish-tag.outputs.releaseTag }}

  publish-release:
    name: Publish release
    needs: [publish-tag, publish-docker-image] 
    if: contains(inputs.debug, 'false')
    permissions:
      contents: write
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Prebid Server
        uses: actions/checkout@v3
        with:
          fetch-depth: 0
      - name: Create & publish release
        uses: release-drafter/release-drafter@v5.22.0
        with:
          name: ${{ needs.publish-tag.outputs.releaseTag }}
          tag: ${{ needs.publish-tag.outputs.releaseTag }}
          version: ${{ needs.publish-tag.outputs.releaseTag }}
          publish: true
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}