[llvm] Add Scorecard Action (PR #69933)

[Diogo Teles Sant'Anna via llvm-commits]

https://github.com/diogoteles08 updated https://github.com/llvm/llvm-project/pull/69933

>From 6e5a36161766bb257e8fc4c4156211dec955cdea Mon Sep 17 00:00:00 2001
From: Diogo Teles Sant'Anna <diogoteles at google.com>
Date: Mon, 23 Oct 2023 12:01:04 -0300
Subject: [PATCH 1/2] Create scorecard.yml

---
 .github/workflows/scorecard.yml | 61 +++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 .github/workflows/scorecard.yml

diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
new file mode 100644
index 000000000000000..145e36febfd760c
--- /dev/null
+++ b/.github/workflows/scorecard.yml
@@ -0,0 +1,61 @@
+# This workflow uses actions that are not certified by GitHub. They are provided
+# by a third-party and are governed by separate terms of service, privacy
+# policy, and support documentation.
+
+name: Scorecard supply-chain security
+on:
+  # For Branch-Protection check. Only the default branch is supported. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#branch-protection
+  branch_protection_rule:
+  # To guarantee Maintained check is occasionally updated. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#maintained
+  schedule:
+    - cron: '38 20 * * 4'
+  push:
+    branches: [ "main" ]
+
+# Declare default permissions as read only.
+permissions:
+  contents: read
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-latest
+    permissions:
+      # Needed to upload the results to code-scanning dashboard.
+      security-events: write
+      # Needed to publish results and get a badge (see publish_results below).
+      id-token: write      
+
+    steps:
+      - name: "Checkout code"
+        uses: actions/checkout at 93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v3.1.0
+        with:
+          persist-credentials: false
+
+      - name: "Run analysis"
+        uses: ossf/scorecard-action at e38b1902ae4f44df626f11ba0734b14fb91f8f86 # v2.1.2
+        with:
+          results_file: results.sarif
+          results_format: sarif
+
+          #   - Publish results to OpenSSF REST API for easy access by consumers
+          #   - Allows the repository to include the Scorecard badge.
+          #   - See https://github.com/ossf/scorecard-action#publishing-results.      
+          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 at 3cea5372237819ed00197afe530f5a7ea3e805c8 # v3.1.0
+        with:
+          name: SARIF file
+          path: results.sarif
+          retention-days: 5
+
+      # Upload the results to GitHub's code scanning dashboard.
+      - name: "Upload to code-scanning"
+        uses: github/codeql-action/upload-sarif at 17573ee1cc1b9d061760f3a006fc4aac4f944fd5 # v2.2.4
+        with:
+          sarif_file: results.sarif

>From c807ddfc4e763b68edaac2a23f56b1e0d7420dca Mon Sep 17 00:00:00 2001
From: Diogo Teles Sant'Anna <diogoteles at google.com>
Date: Mon, 30 Oct 2023 14:48:30 -0300
Subject: [PATCH 2/2] Add link to Scorecard viewer on the action

---
 .github/workflows/scorecard.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
index 145e36febfd760c..4469222c79f1e21 100644
--- a/.github/workflows/scorecard.yml
+++ b/.github/workflows/scorecard.yml
@@ -2,6 +2,8 @@
 # by a third-party and are governed by separate terms of service, privacy
 # policy, and support documentation.
 
+# Check current LLVM-Project results here: https://securityscorecards.dev/viewer/?uri=github.com/llvm/llvm-project
+
 name: Scorecard supply-chain security
 on:
   # For Branch-Protection check. Only the default branch is supported. See