draft-release.yml

name: V2 Draft New Release

on:
  workflow_dispatch:
    inputs:
      version:
        description: 'Version for new draft (e.g. v0.1.0)'
        required: true

env:
  GITHUB_USER: seldondev
  KUSTOMIZE_VERSION: 4.5.5
  HELM_VERSION: v3.8.1

jobs:
  draft-release:
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - name: Output Inputs
        run: echo "${{ toJSON(github.event.inputs) }}"

      - name: Checkout Git Commit
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Validate workflow inputs
        shell: bash
        run: |
          set -e

          RELEASE_BRANCH=${GITHUB_REF_NAME}
          RELEASE_TAG="${{ github.event.inputs.version }}"

          # Ensure that we do not run on master
          if [ "${RELEASE_BRANCH}" == "master" ] || [ "${RELEASE_BRANCH}" == "v2" ]; then
            echo "::error::Cannot run this workflow on master branch"
            exit 1
          fi

          # TODO: validate that RELEASE BRANCH is for the release line

          # Release tag version must match v<major>.<minor>.<patch> and optional -rcX suffix
          if ! echo "${RELEASE_TAG}" | egrep '^v[0-9]+\.[0-9]+\.[0-9]+(-rc[0-9]+)*$'; then
            echo "::error::Target version '${RELEASE_TAG}' is not valid release tag." >&2
            exit 1
          fi

          # Ensure that release does not yet exist
          if git rev-parse ${RELEASE_TAG}; then
            echo "::error::Release tag ${RELEASE_TAG} already exists. Stopping draft process."
            exit 1
          fi

          # Save env variables for later steps
          echo "RELEASE_BRANCH=${RELEASE_BRANCH}" >> $GITHUB_ENV
          echo "RELEASE_TAG=${RELEASE_TAG}" >> $GITHUB_ENV

      - name: Configure Git
        run: |
          git config --global user.name "${GITHUB_USER}"
          git config --global user.email "${GITHUB_USER}@users.noreply.github.com"

      - name: Setup node
        uses: actions/setup-node@v4
        with:
          node-version: 14

      - name: Setup Go
        uses: actions/setup-go@v4
        with:
          go-version: '1.20'
          cache: false

      - name: Setup Helm
        uses: azure/setup-helm@v3
        with:
          version: "${{ env.HELM_VERSION }}"

      - name: Setup Kustomize
        run: |
          curl -s "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh"  | bash -s -- ${KUSTOMIZE_VERSION}
          sudo mv kustomize /usr/local/bin/

      - name: Set versions in helm charts and yaml manifests
        run: |
          make NEW_VERSION=${RELEASE_TAG#v} set-versions
          git add k8s/helm-charts && git commit -m "Setting version for helm charts" || echo "Nothing to commit"
          git add k8s/yaml && git commit -m "Setting version for yaml manifests" || echo "Nothing to commit"

      - name: Prepare artifacts
        run: |
          make prep-artifacts

      - name: Upload artifacts
        uses: actions/upload-artifact@v3
        with:
          name: artifacts
          path: .release/

      - name: Install auto-changelog tool
        run: |
          npm install -g auto-changelog

      - name: Check if release is for core version
        run: |
          if [[ ${RELEASE_TAG} == ${RELEASE_TAG%-*} ]]; then
            echo "Core release"
            echo "IS_RELEASE_CORE_VERSION=true" >> $GITHUB_ENV
          else
            echo "Non-core release"
            echo "IS_RELEASE_CORE_VERSION=false" >> $GITHUB_ENV
          fi

      - name: Generate CHANGELOG.md
        run: |
          git commit -m "Generating changelog for ${RELEASE_TAG}" --allow-empty
          if ${IS_RELEASE_CORE_VERSION}; then
            git tag "${RELEASE_TAG}" --force && auto-changelog --tag-pattern ^v\([0-9]\+\.\){2}[0-9]\+$ --starting-version v2.0.0 --ending-version ${RELEASE_TAG} -l 5
          else
            git tag "${RELEASE_TAG}" --force && auto-changelog -l 5 --starting-version v2.0.0 --ending-version ${RELEASE_TAG}
          fi
          git add CHANGELOG.md && git commit --amend --no-edit || echo "Nothing to commit"

      - name: Generate release-notes.txt
        run: |
          if ${IS_RELEASE_CORE_VERSION}; then
            auto-changelog --tag-pattern ^v\([0-9]\+\.\){2}[0-9]\+$ --starting-version ${RELEASE_TAG} --ending-version ${RELEASE_TAG} -l 5 -o release-notes.txt
          else
            auto-changelog -l 5 --starting-version ${RELEASE_TAG} --ending-version ${RELEASE_TAG} -o release-notes.txt
          fi

      - name: Upload release notes
        uses: actions/upload-artifact@v3
        with:
          name: release-notes
          path: release-notes.txt

      - name: Push new commits to repository
        run: git push

      - name: Create or edit release draft
        run: |
          # TODO: Valdiate that there is no published released (we should not get here if tag exists anyway)
          gh release delete "${RELEASE_TAG}" --yes || echo "Draft does not yet exist"
          gh release create "${RELEASE_TAG}" --draft \
            --title "${RELEASE_TAG}"  \
            --notes-file release-notes.txt \
            --target "${RELEASE_BRANCH}" \
            .release/*
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}