allows benchmark results to be commented securely even from forks

.github/workflows/benchmark.yml

@@ -4,7 +4,7 @@ on:
   pull_request:
 
 jobs:
-  benchmark:
+  performance-tracking:
     runs-on: ubuntu-latest
     steps:
       # setup
@@ -16,7 +16,7 @@ jobs:
       - name: install dependencies
         run: julia -e 'using Pkg; pkg"add PkgBenchmark BenchmarkCI@0.1"'
 
-      # benchmark
+      # run the benchmark suite
       - name: run benchmarks
         run: |
           julia -e '
@@ -25,9 +25,8 @@ jobs:
             BenchmarkCI.displayjudgement()
             '
 
-      # generate result markdown
+      # generate and record the benchmark result as markdown
       - name: generate benchmark result
-        id: generate-result-markdown
         run: |
           body=$(julia -e '
           using BenchmarkCI
@@ -42,27 +41,14 @@ jobs:
           body="${body//'%'/'%25'}"
           body="${body//$'\n'/'%0A'}"
           body="${body//$'\r'/'%0D'}"
-          echo ::set-output name=body::$body
+          echo $body > ./benchmark-result.artifact
 
-      # check if the previous comment exists
-      - name: find comment
-        uses: peter-evans/find-comment@v1
-        id: fc
-        with:
-          issue-number: ${{ github.event.pull_request.number }}
-          comment-author: 'github-actions[bot]'
-          body-includes: JET Benchmark Result
+      # record the pull request number
+      - name: record pull request number
+        run: echo ${{ github.event.pull_request.number }} > ./pull-request-number.artifact
 
-      # create/update comment
-      - name: create comment
-        if: ${{ steps.fc.outputs.comment-id == 0 }}
-        uses: peter-evans/create-or-update-comment@v1
-        with:
-          issue-number: ${{ github.event.pull_request.number }}
-          body: ${{ steps.generate-result-markdown.outputs.body }}
-      - name: update comment
-        if: ${{ steps.fc.outputs.comment-id != 0 }}
-        uses: peter-evans/create-or-update-comment@v1
+      # save as artifacts (performance tracking (comment) workflow will use it)
+      - uses: actions/upload-artifact@v2
         with:
-          comment-id: ${{ steps.fc.outputs.comment-id }}
-          body: ${{ steps.generate-result-markdown.outputs.body }}
+          name: perforamance-tracking
+          path: ./*.artifact