Adding Code Scanner Semgrep.yml workflow file

Author: bstack-security-github

.github/workflows/Semgrep.yml

@@ -0,0 +1,48 @@
+# Name of this GitHub Actions workflow.
+name: Semgrep
+
+on:
+  # Scan changed files in PRs (diff-aware scanning):
+  # The branches below must be a subset of the branches above
+  pull_request:
+    branches: ["master", "main"]
+  push:
+    branches: ["master", "main"]
+  schedule:
+    - cron: '0 6 * * *'
+
+
+permissions:
+  contents: read
+
+jobs:
+  semgrep:
+    # User definable name of this GitHub Actions job.
+    permissions:
+      contents: read  # for actions/checkout to fetch code
+      security-events: write  # for github/codeql-action/upload-sarif to upload SARIF results
+    name: semgrep/ci 
+    # If you are self-hosting, change the following `runs-on` value: 
+    runs-on: ubuntu-latest
+
+    container:
+      # A Docker image with Semgrep installed. Do not change this.
+      image: returntocorp/semgrep
+
+    # Skip any PR created by dependabot to avoid permission issues:
+    if: (github.actor != 'dependabot[bot]')
+
+    steps:
+      # Fetch project source with GitHub Actions Checkout.
+      - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
+      # Run the "semgrep ci" command on the command line of the docker image.
+      - run: semgrep ci --sarif --output=semgrep.sarif
+        env:
+            # Add the rules that Semgrep uses by setting the SEMGREP_RULES environment variable. 
+            SEMGREP_RULES: p/default # more at semgrep.dev/explore
+
+      - name: Upload SARIF file for GitHub Advanced Security Dashboard
+        uses: github/codeql-action/upload-sarif@6c089f53dd51dc3fc7e599c3cb5356453a52ca9e # v2.20.0
+        with:
+          sarif_file: semgrep.sarif
+        if: always()