name: Create ArgoCD release
on:
  push:
    tags:
      - "release-v*"
      - "!release-v1.5*"
      - "!release-v1.4*"
      - "!release-v1.3*"
      - "!release-v1.2*"
      - "!release-v1.1*"
      - "!release-v1.0*"
      - "!release-v0*"

env:
    GOLANG_VERSION: '1.18'

jobs:
  prepare-release:
    name: Perform automatic release on trigger ${{ github.ref }}
    if: github.repository == 'argoproj/argo-cd'
    runs-on: ubuntu-latest
    env:
      # The name of the tag as supplied by the GitHub event
      SOURCE_TAG: ${{ github.ref }}
      # The image namespace where Docker image will be published to
      IMAGE_NAMESPACE: quay.io/argoproj
      # Whether to create & push image and release assets
      DRY_RUN: false
      # Whether a draft release should be created, instead of public one
      DRAFT_RELEASE: false
      # Whether to update homebrew with this release as well
      # Set RELEASE_HOMEBREW_TOKEN secret in repository for this to work - needs
      # access to public repositories
      UPDATE_HOMEBREW: false
      # Name of the GitHub user for Git config
      GIT_USERNAME: argo-bot
      # E-Mail of the GitHub user for Git config
      GIT_EMAIL: argoproj@gmail.com
    steps:
      - name: Checkout code
        uses: actions/checkout@v2
        with:
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Check if the published tag is well formed and setup vars
        run: |
          set -xue
          # Target version must match major.minor.patch and optional -rcX suffix
          # where X must be a number.
          TARGET_VERSION=${SOURCE_TAG#*release-v}
          if ! echo "${TARGET_VERSION}" | egrep '^[0-9]+\.[0-9]+\.[0-9]+(-rc[0-9]+)*$'; then
            echo "::error::Target version '${TARGET_VERSION}' is malformed, refusing to continue." >&2
            exit 1
          fi

          # Target branch is the release branch we're going to operate on
          # Its name is 'release-<major>.<minor>'
          TARGET_BRANCH="release-${TARGET_VERSION%\.[0-9]*}"

          # The release tag is the source tag, minus the release- prefix
          RELEASE_TAG="${SOURCE_TAG#*release-}"

          # Whether this is a pre-release (indicated by -rc suffix)
          PRE_RELEASE=false
          if echo "${RELEASE_TAG}" | egrep -- '-rc[0-9]+$'; then
            PRE_RELEASE=true
          fi

          # We must not have a release trigger within the same release branch,
          # because that means a release for this branch is already running.
          if git tag -l | grep "release-v${TARGET_VERSION%\.[0-9]*}" | grep -v "release-v${TARGET_VERSION}"; then
            echo "::error::Another release for branch ${TARGET_BRANCH} is currently in progress."
            exit 1
          fi

          # Ensure that release do not yet exist
          if git rev-parse ${RELEASE_TAG}; then
            echo "::error::Release tag ${RELEASE_TAG} already exists in repository. Refusing to continue."
            exit 1
          fi

          # Make the variables available in follow-up steps
          echo "TARGET_VERSION=${TARGET_VERSION}" >> $GITHUB_ENV
          echo "TARGET_BRANCH=${TARGET_BRANCH}" >> $GITHUB_ENV
          echo "RELEASE_TAG=${RELEASE_TAG}" >> $GITHUB_ENV
          echo "PRE_RELEASE=${PRE_RELEASE}" >> $GITHUB_ENV

      - name: Check if our release tag has a correct annotation
        run: |
          set -ue
          # Fetch all tag information as well
          git fetch --prune --tags --force

          echo "=========== BEGIN COMMIT MESSAGE ============="
          git show ${SOURCE_TAG}
          echo "============ END COMMIT MESSAGE =============="

          # Quite dirty hack to get the release notes from the annotated tag
          # into a temporary file.
          RELEASE_NOTES=$(mktemp -p /tmp release-notes.XXXXXX)

          prefix=true
          begin=false
          git show ${SOURCE_TAG} | while read line; do
            # Whatever is in commit history for the tag, we only want that
            # annotation from our tag. We discard everything else.
            if test "$begin" = "false"; then
              if echo "$line" | grep -q "tag ${SOURCE_TAG#refs/tags/}"; then begin="true"; fi
              continue
            fi
            if test "$prefix" = "true"; then
                  if test -z "$line"; then prefix=false; fi
            else
                  if echo "$line" | egrep -q '^commit [0-9a-f]+'; then
                          break
                  fi
                  echo "$line" >> ${RELEASE_NOTES}
            fi
          done

          # For debug purposes
          echo "============BEGIN RELEASE NOTES================="
          cat ${RELEASE_NOTES}
          echo "=============END RELEASE NOTES=================="

          # Too short release notes are suspicious. We need at least 100 bytes.
          relNoteLen=$(stat -c '%s' $RELEASE_NOTES)
          if test $relNoteLen -lt 100; then
            echo "::error::No release notes provided in tag annotation (or tag is not annotated)"
            exit 1
          fi

          # Check for magic string '## Quick Start' in head of release notes
          if ! head -2 ${RELEASE_NOTES} | grep -iq '## Quick Start'; then
            echo "::error::Release notes seem invalid, quick start section not found."
            exit 1
          fi

          # We store path to temporary release notes file for later reading, we
          # need it when creating release.
          echo "RELEASE_NOTES=${RELEASE_NOTES}" >> $GITHUB_ENV

      - name: Setup Golang
        uses: actions/setup-go@v2
        with:
          go-version: ${{ env.GOLANG_VERSION }}

      - name: Setup Git author information
        run: |
          set -ue
          git config --global user.email "${GIT_EMAIL}"
          git config --global user.name "${GIT_USERNAME}"

      - name: Checkout corresponding release branch
        run: |
          set -ue
          echo "Switching to release branch '${TARGET_BRANCH}'"
          if ! git checkout ${TARGET_BRANCH}; then
            echo "::error::Checking out release branch '${TARGET_BRANCH}' for target version '${TARGET_VERSION}' (tagged '${RELEASE_TAG}') failed. Does it exist in repo?"
            exit 1
          fi

      - name: Create VERSION information
        run: |
          set -ue
          echo "Bumping version from $(cat VERSION) to ${TARGET_VERSION}"
          echo "${TARGET_VERSION}" > VERSION
          git commit -m "Bump version to ${TARGET_VERSION}" VERSION

      - name: Generate new set of manifests
        run: |
          set -ue
          make install-codegen-tools-local
          make manifests-local VERSION=${TARGET_VERSION}
          git diff
          git commit manifests/ -m "Bump version to ${TARGET_VERSION}"

      - name: Create the release tag
        run: |
          set -ue
          echo "Creating release ${RELEASE_TAG}"
          git tag ${RELEASE_TAG}

      - name: Login to docker repositories
        env:
          DOCKER_USERNAME: ${{ secrets.RELEASE_DOCKERHUB_USERNAME }}
          DOCKER_TOKEN: ${{ secrets.RELEASE_DOCKERHUB_TOKEN }}
          QUAY_USERNAME: ${{ secrets.RELEASE_QUAY_USERNAME }}
          QUAY_TOKEN: ${{ secrets.RELEASE_QUAY_TOKEN }}
        run: |
          set -ue
          docker login quay.io --username "${QUAY_USERNAME}" --password "${QUAY_TOKEN}"
          # Remove the following when Docker Hub is gone
          docker login --username "${DOCKER_USERNAME}" --password "${DOCKER_TOKEN}"
        if: ${{ env.DRY_RUN != 'true' }}

      - uses: docker/setup-qemu-action@v1
      - uses: docker/setup-buildx-action@v1
      - name: Build and push Docker image for release
        run: |
          set -ue
          git clean -fd
          mkdir -p dist/
          docker buildx build --platform linux/amd64,linux/arm64,linux/s390x,linux/ppc64le --push -t ${IMAGE_NAMESPACE}/argocd:v${TARGET_VERSION} -t argoproj/argocd:v${TARGET_VERSION} .
          make release-cli
          make checksums
          chmod +x ./dist/argocd-linux-amd64
          ./dist/argocd-linux-amd64 version --client
        if: ${{ env.DRY_RUN != 'true' }}

      - name: Read release notes file
        id: release-notes
        uses: juliangruber/read-file-action@v1
        with:
          path: ${{ env.RELEASE_NOTES }}

      - name: Push changes to release branch
        run: |
          set -ue
          git push origin ${TARGET_BRANCH}
          git push origin ${RELEASE_TAG}

      - name: Dry run GitHub release
        uses: actions/create-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        id: create_release
        with:
          tag_name: ${{ env.RELEASE_TAG }}
          release_name: ${{ env.RELEASE_TAG }}
          draft: ${{ env.DRAFT_RELEASE }}
          prerelease: ${{ env.PRE_RELEASE }}
          body: ${{ steps.release-notes.outputs.content }}
        if: ${{ env.DRY_RUN == 'true' }}

      - name: Generate SBOM (spdx)
        id: spdx-builder
        env:
          # defines the spdx/spdx-sbom-generator version to use.
          SPDX_GEN_VERSION: v0.0.13
          # defines the sigs.k8s.io/bom version to use.
          SIGS_BOM_VERSION: v0.2.1
          # comma delimited list of project relative folders to inspect for package
          # managers (gomod, yarn, npm).
          PROJECT_FOLDERS: ".,./ui" 
          # full qualified name of the docker image to be inspected
          DOCKER_IMAGE: ${{env.IMAGE_NAMESPACE}}/argocd:v${{env.TARGET_VERSION}}
        run: |
          yarn install --cwd ./ui
          go install github.com/spdx/spdx-sbom-generator/cmd/generator@$SPDX_GEN_VERSION
          go install sigs.k8s.io/bom/cmd/bom@$SIGS_BOM_VERSION

          # Generate SPDX for project dependencies analyzing package managers
          for folder in $(echo $PROJECT_FOLDERS | sed "s/,/ /g")
          do
            generator -p $folder -o /tmp
          done

          # Generate SPDX for binaries analyzing the docker image
          if [[ ! -z $DOCKER_IMAGE ]]; then
            bom generate -o /tmp/bom-docker-image.spdx -i $DOCKER_IMAGE
          fi

          cd /tmp && tar -zcf sbom.tar.gz *.spdx
        if: ${{ env.DRY_RUN != 'true' }}

      - name: Create GitHub release
        uses: softprops/action-gh-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          name: ${{ env.RELEASE_TAG }}
          tag_name: ${{ env.RELEASE_TAG }}
          draft: ${{ env.DRAFT_RELEASE }}
          prerelease: ${{ env.PRE_RELEASE }}
          body: ${{ steps.release-notes.outputs.content }}
          files: |
            dist/argocd-*
            /tmp/sbom.tar.gz
        if: ${{ env.DRY_RUN != 'true' }}

      - name: Update homebrew formula
        env:
          HOMEBREW_TOKEN: ${{ secrets.RELEASE_HOMEBREW_TOKEN }}
        uses: dawidd6/action-homebrew-bump-formula@v3
        with:
          token: ${{env.HOMEBREW_TOKEN}}
          formula: argocd
        if: ${{ env.HOMEBREW_TOKEN != '' && env.UPDATE_HOMEBREW == 'true' && env.PRE_RELEASE != 'true' }}

      - name: Delete original request tag from repository
        run: |
          set -ue
          git push --delete origin ${SOURCE_TAG}
        if: ${{ always() }}
