workflows: add scorecards analysis (#4721)

Signed-off-by: Patrick Stephens <[email protected]>

.github/workflows/scorecards-analysis.yaml

@@ -0,0 +1,61 @@
+
+---
+# https://openssf.org/blog/2022/01/19/reducing-security-risks-in-open-source-software-at-scale-scorecards-launches-v4/
+name: Scorecards supply-chain security
+on:
+  # Only the default branch is supported.
+  branch_protection_rule:
+  schedule:
+    # Weekly on Saturdays.
+    - cron: '30 1 * * 6'
+  push:
+    branches: [ main, master ]
+  workflow_dispatch:
+
+# Declare default permissions as read only.
+permissions: read-all
+
+jobs:
+  scorecard-analysis:
+    name: Scorecards analysis
+    runs-on: ubuntu-latest
+    permissions:
+      # Needed to upload the results to code-scanning dashboard.
+      security-events: write
+      actions: read
+      contents: read
+
+    steps:
+      - name: "Checkout code"
+        uses: actions/checkout@v2
+        with:
+          persist-credentials: false
+
+      - name: "Run analysis"
+        uses: ossf/[email protected]
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          # Read-only PAT token. To create it,
+          # follow the steps in https://github.com/ossf/scorecard-action#pat-token-creation.
+          repo_token: ${{ secrets.SCORECARD_READ_TOKEN }}
+          # Publish the results for public repositories to enable scorecard badges. For more details, see
+          # https://github.com/ossf/scorecard-action#publishing-results.
+          # For private repositories, `publish_results` will automatically be set to `false`, regardless
+          # of the value entered here.
+          publish_results: true
+
+      # Upload the results as artifacts (optional). Commenting out will disable uploads of run results in SARIF
+      # format to the repository Actions tab.
+      - name: "Upload artifact"
+        uses: actions/upload-artifact@v2
+        with:
+          name: SARIF file
+          path: scorecard-results.sarif
+          retention-days: 7
+
+      # Upload the results to GitHub's code scanning dashboard.
+      - name: "Upload to code-scanning"
+        uses: github/codeql-action/[email protected]
+        with:
+          sarif_file: scorecard-results.sarif