chore(ci): upkeeping (#1137)

* feat(ci)[nightly]: update tag instead of deleting

* fix(ci)[pr-comment]: work on forks

.github/workflows/nightly.yml

@@ -77,13 +77,10 @@ jobs:
           echo "build_sha=$(cat sha256.checksum)" >> $GITHUB_OUTPUT
           cat sha256.checksum
 
-      - name: Remove previous Nightly
-        uses: dev-drprasad/delete-tag-and-release@v0.2.1
+      - name: Run latest-tag
+        uses: EndBug/latest-tag@84c87607fcb948bcef069c9a27445e653113979f
         with:
-          delete_release: true
-          tag_name: nightly
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          ref: nightly
 
       - name: Nightly Release
         uses: softprops/action-gh-release@v1

.github/workflows/pr-comment.yml

@@ -8,10 +8,20 @@ jobs:
     if: github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.conclusion == 'success'
     runs-on: ubuntu-latest
     steps:
+      - name: Get the PR number
+        run: |
+          # Query the issue search API to get the PR associated with it
+          PR_RAW=$(curl 'https://api.github.com/search/issues?q=${{ github.event.workflow_run.head_commit.id }}')
+          # Get the event number from the search results, which will be the PR number
+          # Filter by PRs only in this repository, as a PR with an identical head commit may be made in another repository (e.g. a fork)
+          # Assume the 0th index in the array of found PRs is the correct one (it seems to usually be the latest one)
+          PR_NUM=$(echo $PR_RAW | jq '.items | map(select(.repository_url=="https://api.github.com/repos/${{ github.repository }}")) | .[0].number')
+          echo "PR_NUM=${PR_NUM}" >> $GITHUB_ENV
       - uses: actions/github-script@v6
         with:
           # This snippet is public-domain, taken from
           # https://github.com/oprypin/nightly.link/blob/master/.github/workflows/pr-comment.yml
+          # and modified to allow comments on external PRs (oprypin/nightly.link/pull/38 & #issuecomment-1200506721)
           script: |
             async function upsertComment(owner, repo, issue_number, purpose, body) {
               const {data: comments} = await github.rest.issues.listComments(
@@ -36,12 +46,7 @@ jobs:
             }
 
             const {owner, repo} = context.repo;
-            const run_id = ${{github.event.workflow_run.id}};
-
-            const pull_requests = ${{ toJSON(github.event.workflow_run.pull_requests) }};
-            if (!pull_requests.length) {
-              return core.error("This workflow doesn't match any pull requests!");
-            }
+            const run_id = '${{github.event.workflow_run.id}}';
 
             const artifacts = await github.paginate(
               github.rest.actions.listWorkflowRunArtifacts, {owner, repo, run_id});
@@ -54,8 +59,4 @@ jobs:
             }
 
             core.info("Review thread message body:", body);
-
-            for (const pr of pull_requests) {
-              await upsertComment(owner, repo, pr.number,
-                "nightly-link", body);
-            }
+            await upsertComment(owner, repo, ${{ env.PR_NUM }}, "nightly-link", body);