Add automatic changelog generation in release workflow (#784)

Author: spencerugbo

.github/workflows/release-branch.yml

@@ -10,11 +10,6 @@ on:
         required: true
         type: boolean
         default: false
-      createPullRequest:
-        description: 'Create pull request back into main'
-        required: true
-        type: boolean
-        default: false
       uploadJWT:
         description: 'Temporary JWT to publish packages to up-ap.nginx.com'
         required: true
@@ -125,12 +120,27 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y gpgv1 monkeysphere 
-          go install github.com/goreleaser/nfpm/v2/cmd/nfpm@${{ env.NFPM_VERSION }}
-      - name: Tag release
+          go install github.com/goreleaser/nfpm/v2/cmd/[email protected]
+      - name: Generate Changelog
+        env:
+            GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
+          git clone https://github.com/nginx/agent-changelog.git
+          cd ./agent-changelog/source
+          pip install -r requirements.txt
+          python agent.py
+      - name: Push Changelog
+        run: |
+          mv agent-changelog/source/changelog.md ./site/content/
+          
           git config --global user.name 'github-actions'
           git config --global user.email '41898282+github-actions[bot]@users.noreply.github.com'
 
+          git add ./site/content/changelog.md
+          git commit -m "Add generated changelog"
+          git push origin HEAD:${{ github.ref_name }}
+      - name: Tag release
+        run: |
           git tag -a "v${{env.VERSION}}" -m "CI Autogenerated"
           git tag -a "sdk/v${{env.VERSION}}" -m "CI Autogenerated"
       - name: Push Tags
@@ -175,8 +185,6 @@ jobs:
           az logout
         if: always()
       - name: Upload Release Assets
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         # clobber overwrites existing assets of the same name
         run: |
           gh release upload --clobber v${{env.VERSION}} \
@@ -202,7 +210,7 @@ jobs:
             }))
             console.log(`Release published: ${release.data.html_url}`)
       - name: Create Pull Request
-        if: ${{ inputs.publishPackages == true && inputs.createPullRequest == true }}
+        if: ${{ inputs.publishPackages == true }}
         uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
         with:
           script: |