Create collector-contrib pull request on release (#369)

* Create collector-contrib pull request on release

* Single bot

.github/workflows/release.yml

@@ -54,6 +54,9 @@ jobs:
     needs:
       - build
       - integration-test
+    outputs:
+      jmx-metrics-version: ${{ steps.create-github-release.outputs.jmx-metrics-version }}
+      jmx-metrics-sha256: ${{ steps.create-github-release.outputs.jmx-metrics-sha256 }}
     steps:
       - run: |
           if [[ $GITHUB_REF_NAME != release/* ]]; then
@@ -164,11 +167,13 @@ jobs:
           .github/scripts/generate-release-contributors.sh v$PRIOR_VERSION >> /tmp/release-notes.txt
           fi
 
+      - id: create-github-release
       - name: Create GitHub release
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          cp jmx-metrics/build/libs/opentelemetry-jmx-metrics-$VERSION-alpha.jar opentelemetry-jmx-metrics.jar
+          jmx_metrics_version=$VERSION-alpha
+          cp jmx-metrics/build/libs/opentelemetry-jmx-metrics-$jmx_metrics_version.jar opentelemetry-jmx-metrics.jar
           gh release create --target $GITHUB_REF_NAME \
                             --title "Version $VERSION" \
                             --notes-file /tmp/release-notes.txt \
@@ -176,6 +181,9 @@ jobs:
                             v$VERSION \
                             opentelemetry-jmx-metrics.jar
 
+          echo "::set-output name=jmx-metrics-version::$jmx_metrics_version"
+          echo "::set-output name=jmx-metrics-sha256::$(sha256sum opentelemetry-jmx-metrics.jar)"
+
       - uses: actions/checkout@v3
         with:
           # the step below is creating a pull request against main
@@ -252,3 +260,12 @@ jobs:
                        --body "$body" \
                        --head $branch \
                        --base main
+
+  create-collector-contrib-pull-request:
+    needs: release
+    uses: ./.github/workflows/reusable-create-collector-contrib-pull-request.yml
+    with:
+      jmx-metrics-version: ${{ needs.release.outputs.jmx-metrics-version }}
+      jmx-metrics-sha256: ${{ needs.release.outputs.jmx-metrics-sha256 }}
+    secrets:
+      BOT_TOKEN: ${{ secrets.BOT_TOKEN }}

.github/workflows/reusable-create-collector-contrib-pull-request.yml

@@ -0,0 +1,75 @@
+name: Reusable - Create collector contrib pull request
+
+on:
+  workflow_call:
+    inputs:
+      jmx-metrics-version:
+        type: string
+        required: true
+      jmx-metrics-sha256:
+        type: string
+        required: true
+    secrets:
+      BOT_TOKEN:
+        required: true
+  # to help with partial release build failures
+  workflow_dispatch:
+    inputs:
+      jmx-metrics-version:
+        description: "JMX metrics version"
+        required: true
+      jmx-metrics-sha256:
+        description: "JMX metrics hash (sha256)"
+        required: true
+
+jobs:
+  create-collector-contrib-pull-request:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          repository: opentelemetry-java-bot/opentelemetry-collector-contrib
+          # this is the personal access token used for "git push" below
+          token: ${{ secrets.BOT_TOKEN }}
+
+      - name: Initialize pull request branch
+        env:
+          VERSION: ${{ inputs.jmx-metrics-version }}
+        run: |
+          git remote add upstream https://github.com/open-telemetry/opentelemetry-collector-contrib.git
+          git fetch upstream
+          git checkout -b update-opentelemetry-jmx-metrics-to-${VERSION} upstream/main
+
+      - name: Update version
+        env:
+          VERSION: ${{ inputs.jmx-metrics-version }}
+          HASH: ${{ inputs.jmx-metrics-sha256 }}
+        run: |
+          # NOTE there are intentional tab characters in the line below
+          sed "/^var jmxMetricsGathererVersions/a \	\"$HASH\": {\n		version: \"$VERSION\",\n		jar:     \"JMX metrics gatherer\",\n	}," receiver/jmxreceiver/supported_jars.go
+          git diff
+
+      - 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-collector-contrib
+        env:
+          # this is the personal access token used for "gh pr create" below
+          GITHUB_TOKEN: ${{ secrets.BOT_TOKEN }}
+          VERSION: ${{ inputs.jmx-metrics-version }}
+        run: |
+          message="Update the jmx-metrics version to $VERSION"
+          body="Update the jmx-metrics version to \`$VERSION\`."
+
+          # 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 commit -a -m "$message"
+          git push --set-upstream origin HEAD:update-opentelemetry-jmx-metrics-to-${VERSION}
+          gh pr create --title "$message" \
+                       --body "$body" \
+                       --repo open-telemetry/opentelemetry-collector-contrib \
+                       --base main