name: Release
on:
  workflow_dispatch:

jobs:
  assemble:
    uses: ./.github/workflows/reusable-assemble.yml

  test:
    uses: ./.github/workflows/reusable-test.yml

  # test-latest-deps is intentionally not included in the release workflows
  # because any time a new library version is released to maven central
  # it can fail due to test code incompatibility with the new library version,
  # or due to slight changes in emitted telemetry

  smoke-test:
    uses: ./.github/workflows/reusable-smoke-test.yml

  # muzzle is intentionally not included in the release workflows
  # because any time a new library version is released to maven central it can fail,
  # and this is not a reason to hold up the release

  gradle-plugins:
    uses: ./.github/workflows/reusable-gradle-plugins.yml

  examples:
    uses: ./.github/workflows/reusable-examples.yml

  release:
    needs:
      - assemble
      - test
      - smoke-test
      - gradle-plugins
      - examples
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
        with:
          # tags are needed for the generate-release-contributors.sh script
          fetch-depth: 0

      - name: Set up JDK for running Gradle
        uses: actions/setup-java@v2
        with:
          distribution: temurin
          java-version: 17

      - name: Build and publish artifacts
        uses: gradle/gradle-build-action@v2
        with:
          arguments: assemble publishToSonatype closeAndReleaseSonatypeStagingRepository
        env:
          SONATYPE_USER: ${{ secrets.SONATYPE_USER }}
          SONATYPE_KEY: ${{ secrets.SONATYPE_KEY }}
          GPG_PRIVATE_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
          GPG_PASSWORD: ${{ secrets.GPG_PASSWORD }}

      - name: Build and publish gradle plugins
        uses: gradle/gradle-build-action@v2
        env:
          SONATYPE_USER: ${{ secrets.SONATYPE_USER }}
          SONATYPE_KEY: ${{ secrets.SONATYPE_KEY }}
          GRADLE_PUBLISH_KEY: ${{ secrets.GRADLE_PUBLISH_KEY }}
          GRADLE_PUBLISH_SECRET: ${{ secrets.GRADLE_PUBLISH_SECRET }}
          GPG_PRIVATE_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
          GPG_PASSWORD: ${{ secrets.GPG_PASSWORD }}
        with:
          # Don't use publishToSonatype since we don't want to publish the marker artifact
          arguments: build publishPlugins publishPluginMavenPublicationToSonatypeRepository closeAndReleaseSonatypeStagingRepository
          build-root-directory: gradle-plugins

      - name: Set environment variables
        run: |
          version=$(grep -Eo "[0-9]+.[0-9]+.[0-9]+" version.gradle.kts | head -1)
          if [[ $version =~ ([0-9]+).([0-9]+).([0-9]+) ]]; then
            major="${BASH_REMATCH[1]}"
            minor="${BASH_REMATCH[2]}"
            patch="${BASH_REMATCH[3]}"
          else
            echo "unexpected version: $version"
            exit 1
          fi
          if [[ $patch == 0 ]]; then
            if [[ $minor == 0 ]]; then
              prior_major=$((major - 1))
              prior_minor=$(grep -Po "^## Version $prior_major.\K([0-9]+)" CHANGELOG.md  | head -1)
              prior_version="$prior_major.$prior_minor"
            else
              prior_version="$major.$((minor - 1)).0"
            fi
          else
              prior_version="$major.$minor.$((patch - 1))"
          fi
          echo "VERSION=$version" >> $GITHUB_ENV
          echo "PRIOR_VERSION=$prior_version" >> $GITHUB_ENV

      - name: Generate release notes
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          # conditional blocks not indented because of the heredoc
          if [[ $VERSION == *.0 ]]; then
          cat > release-notes.txt << EOF
          This release targets the OpenTelemetry SDK $VERSION.

          Note that all artifacts other than \`io.opentelemetry.javaagent:opentelemetry-javaagent\` have the \`-alpha\` suffix attached to their version number, reflecting that they are still alpha quality and will continue to have breaking changes. Please see the [VERSIONING.md](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/VERSIONING.md#opentelemetry-java-instrumentation-versioning) for more details.

          EOF
          else
          cat > release-notes.txt << EOF
          This is a patch release on the previous $PRIOR_VERSION release, fixing the issue(s) below.

          EOF
          fi

          sed -n "/^## Version $VERSION/,/^## Version /p" CHANGELOG.md \
            | tail -n +2 \
            | head -n -1 \
            | perl -0pe 's/^\n+//g' \
            | perl -0pe 's/\n+$/\n/g' \
            | sed -r "s,\[#([0-9]+)]\(https://github.com/$GITHUB_REPOSITORY/(pull|issues)/[0-9]+\),#\1," \
            | perl -0pe 's/\n +/ /g' \
            >> release-notes.txt

          # conditional block not indented because of the heredoc
          if [[ $VERSION == *.0 ]]; then
          cat >> release-notes.txt << EOF

          ### 🙇 Thank you
          This release was possible thanks to the following contributors who shared their brilliant ideas and awesome pull requests:

          EOF

          .github/scripts/generate-release-contributors.sh v$PRIOR_VERSION $GITHUB_REF_NAME >> release-notes.txt
          fi

      - name: Create GitHub release
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          cp javaagent/build/libs/opentelemetry-javaagent-$VERSION.jar opentelemetry-javaagent.jar
          gh release create --target $GITHUB_REF_NAME \
                            --title "Version $VERSION" \
                            --notes-file release-notes.txt \
                            --discussion-category announcements \
                            v$VERSION \
                            opentelemetry-javaagent.jar

      - name: Update the change log with the release date
        run: |
          date=$(gh release view v$VERSION --json publishedAt --jq .publishedAt | sed 's/T.*//')
          sed -ri "s/## Version $VERSION .*/## Version $VERSION ($date)/" CHANGELOG.md

      - name: Set git user
        run: |
          git config user.name opentelemetry-java-bot
          git config user.email 97938252+opentelemetry-java-bot@users.noreply.github.com

      - name: Create pull request against the release branch
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          msg="Add $VERSION release date to the change log"
          git commit -a -m "$msg"
          git push origin HEAD:add-$VERSION-release-date
          gh pr create --title "[$GITHUB_REF_NAME] $msg" \
                       --body "$msg" \
                       --head add-$VERSION-release-date \
                       --base $GITHUB_REF_NAME

      - uses: actions/checkout@v3
        with:
          repository: opentelemetry-java-bot/opentelemetry-operator
          # this is the PAT used for "git push" below
          token: ${{ secrets.OPENTELEMETRY_JAVA_BOT_TOKEN }}

      - name: Initialize pull request branch
        run: |
          git remote add upstream https://github.com/open-telemetry/opentelemetry-operator.git
          git fetch upstream
          git checkout -b update-opentelemetry-javaagent-to-$VERSION upstream/main

      - name: Bump version
        run: |
          echo $VERSION > autoinstrumentation/java/version.txt

      - name: Set git user
        run: |
          git config user.name opentelemetry-java-bot
          git config user.email 97938252+opentelemetry-java-bot@users.noreply.github.com

      - name: Create pull request against opentelemetry-operator
        env:
          # this is the PAT used for "gh pr create" below
          GITHUB_TOKEN: ${{ secrets.OPENTELEMETRY_JAVA_BOT_TOKEN }}
        run: |
          msg="Update opentelemetry-javaagent version to $VERSION"
          git commit -a -m "$msg"

          # gh pr create doesn't have a way to explicitly specify different head and base
          # repositories currently, but it will implicitly pick up the head from a different
          # repository if you set up a tracking branch

          git push --set-upstream origin update-opentelemetry-javaagent-to-$VERSION

          gh pr create --title "$msg" \
                       --body "$msg" \
                       --repo open-telemetry/opentelemetry-operator
                       --base main
