Sync backport.yml changes from dotnet/runtime

1 files changed, 39 insertions, 6 deletions

diff --git a/.github/workflows/backport.yml b/.github/workflows/backport.yml
index baf7a79a29a..5f6fe9827f2 100644
--- a/.github/workflows/backport.yml
+++ b/.github/workflows/backport.yml
@@ -2,15 +2,36 @@ name: Backport PR to branch
 on:
   issue_comment:
     types: [created]
+  schedule:
+    # once a day at 13:00 UTC
+    - cron: '0 13 * * *'
 
 permissions:
-  contents: read
+  contents: write
+  issues: write
+  pull-requests: write
 
 jobs:
-  backport:
+  cleanup_old_runs:
+    if: github.event.schedule == '0 13 * * *'
+    runs-on: ubuntu-20.04
     permissions:
-      issues: write # for octokit.rest.issues.createComment in ./scripts/ci/actions/backport
-      pull-requests: write # for octokit.rest.pulls.create in ./scripts/ci/actions/backport
+      actions: write
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+    - name: Delete old workflow runs
+      run: |
+        _UrlPath="/repos/$GITHUB_REPOSITORY/actions/workflows"
+        _CurrentWorkflowID="$(gh api -X GET "$_UrlPath" | jq '.workflows[] | select(.name == '\""$GITHUB_WORKFLOW"\"') | .id')"
+
+        # delete workitems which are 'completed'. (other candidate values of status field are: 'queued' and 'in_progress')
+
+        gh api -X GET "$_UrlPath/$_CurrentWorkflowID/runs" --paginate \
+          | jq '.workflow_runs[] | select(.status == "completed") | .id' \
+          | xargs -I{} gh api -X DELETE "/repos/$GITHUB_REPOSITORY/actions/runs"/{}
+
+  backport:
     if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/backport to')
     runs-on: ubuntu-20.04
     steps:
@@ -23,7 +44,7 @@ jobs:
           if (context.eventName !== "issue_comment") throw "Error: This action only works on issue_comment events.";
 
           // extract the target branch name from the trigger phrase containing these characters: a-z, A-Z, digits, forward slash, dot, hyphen, underscore
-          const regex = /\/backport to ([a-zA-Z\d\/\.\-\_]+)/;
+          const regex = /^\/backport to ([a-zA-Z\d\/\.\-\_]+)/;
           target_branch = regex.exec(context.payload.comment.body);
           if (target_branch == null) throw "Error: No backport branch found in the trigger phrase.";
 
@@ -44,7 +65,19 @@ jobs:
       with:
         fetch-depth: 0
     - name: Run backport
-      uses: ./scripts/ci/actions/backport
+      uses: ./eng/actions/backport
       with:
         target_branch: ${{ steps.target-branch-extractor.outputs.result }}
         auth_token: ${{ secrets.GITHUB_TOKEN }}
+        pr_description_template: |
+          Backport of #%source_pr_number% to %target_branch%
+
+          /cc %cc_users%
+
+          ## Customer Impact
+
+          ## Testing
+
+          ## Risk
+
+          IMPORTANT: Is this backport for a servicing release? If so and this change touches code that ships in a NuGet package, please make certain that you have added any necessary [package authoring](https://github.com/dotnet/runtime/blob/main/docs/project/library-servicing.md) and gotten it explicitly reviewed.