Add changelog workflow

.github/workflows/update-changelog.yaml

@@ -1,4 +1,4 @@
-name: '[Release] Update CHANGELOG.md'
+name: "[Release] Update CHANGELOG.md"
 on:
   release:
     types: [released]
@@ -8,22 +8,22 @@ permissions:
 jobs:
   setup:
     # this workflow will always fail in forks; bail if this isn't running in the upstream
-    #if: github.repository == 'awslabs/amazon-eks-ami'  
+    if: github.repository == 'awslabs/amazon-eks-ami'
     runs-on: ubuntu-latest
     outputs:
       tag_name: ${{ steps.variables.outputs.tag_name }}
     steps:
-    - id: variables
-      run: |
-        echo "tag_name=$(echo ${{ github.ref }} | cut -d/ -f3)" >> $GITHUB_OUTPUT
+      - id: variables
+        run: |
+          echo "tag_name=$(echo ${{ github.ref }} | cut -d/ -f3)" >> $GITHUB_OUTPUT
   update-changelog:
     runs-on: ubuntu-latest
     needs:
-      - setup    
+      - setup
     steps:
       - uses: actions/checkout@v3
         with:
-          repository: cartermckinnon/amazon-eks-ami
+          repository: awslabs/amazon-eks-ami
           ref: refs/heads/master
           path: amazon-eks-ami/
       - uses: actions/github-script@v6
@@ -33,29 +33,28 @@ jobs:
             const changelogPath = './amazon-eks-ami/CHANGELOG.md';
             const placeholder = '<!--new-changelog-entry-placeholder-->';
             const tagName = '${{ needs.setup.outputs.tag_name }}';
-            console.log(context.repo.owner);
-            console.log(context.repo.repo);
             const release = await github.rest.repos.getReleaseByTag({
               tag: tagName,
               owner: context.repo.owner,
               repo: context.repo.repo,
             });
-            const newEntry = `###  ${release.data.title}\n${release.data.body}`;
-            console.log(newEntry);
-            const changelog = fs.readFileSync(changelogPath);
-            const updatedChangelog = changelog.toString().replace(placeholder, placeholder + '\n\n' + newEntry);
+            const changelog = fs.readFileSync(changelogPath, 'utf8');
+            if (changelog.contains(release.data.name)) {
+              throw new Error(`changelog already contains ${release.data.name}`);
+            }
+            const newEntry = `###  ${release.data.name}\n${release.data.body}`;
+            const updatedChangelog = changelog.replace(placeholder, placeholder + '\n\n' + newEntry);
             fs.writeFileSync(changelogPath, updatedChangelog);
-            console.log(updatedChangelog);
       - uses: peter-evans/create-pull-request@v4
         with:
-            branch: update-changelog
-            path: amazon-eks-ami/
-            add-paths: CHANGELOG.md
-            commit-message: "Update CHANGELOG.md for release ${{ needs.setup.outputs.tag_name }}"
-            committer: "GitHub <noreply@github.com>"
-            author: "GitHub <noreply@github.com>"
-            title: "Update CHANGELOG.md"
-            labels: |
-              changelog/exclude
-            body: |
-              Adds CHANGELOG.md entry for release [${{ needs.setup.outputs.tag_name }}](https://github.com/awslabs/amazon-eks-ami/releases/tag/${{ needs.setup.outputs.tag_name }}).
+          branch: update-changelog
+          path: amazon-eks-ami/
+          add-paths: CHANGELOG.md
+          commit-message: "Update CHANGELOG.md for release ${{ needs.setup.outputs.tag_name }}"
+          committer: "GitHub <noreply@github.com>"
+          author: "GitHub <noreply@github.com>"
+          title: "Update CHANGELOG.md"
+          labels: |
+            changelog/exclude
+          body: |
+            Adds CHANGELOG.md entry for release [${{ needs.setup.outputs.tag_name }}](https://github.com/awslabs/amazon-eks-ami/releases/tag/${{ needs.setup.outputs.tag_name }}).