Introduce zizmor (#605)

* Introduce zizmor

* harden workflows

Author: Tinche

.github/workflows/main.yml

@@ -19,6 +19,8 @@ jobs:
 
     steps:
       - uses: "actions/checkout@v4"
+        with:
+          persist-credentials: false
 
       - uses: "pdm-project/setup-pdm@v4"
         with:
@@ -48,6 +50,8 @@ jobs:
 
     steps:
       - uses: "actions/checkout@v4"
+        with:
+          persist-credentials: false
 
       - uses: "actions/setup-python@v5"
         with:
@@ -104,6 +108,8 @@ jobs:
 
     steps:
       - uses: "actions/checkout@v4"
+        with:
+          persist-credentials: false
       - uses: "pdm-project/setup-pdm@v4"
         with:
           python-version: "3.12"

.github/workflows/pypi-package.yml

@@ -10,10 +10,6 @@ on:
       - published
   workflow_dispatch:
 
-permissions:
-  contents: read
-  id-token: write
-
 jobs:
   build-package:
     name: Build & verify package
@@ -23,6 +19,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
+          persist-credentials: false
 
       - uses: hynek/build-and-inspect-python-package@v1
 
@@ -33,6 +30,8 @@ jobs:
     if: github.event_name == 'push' && github.ref == 'refs/heads/main'
     runs-on: ubuntu-latest
     needs: build-package
+    permissions:
+      id-token: write
 
     steps:
       - name: Download packages built by build-and-inspect-python-package
@@ -53,6 +52,8 @@ jobs:
     if: github.event.action == 'published'
     runs-on: ubuntu-latest
     needs: build-package
+    permissions:
+      id-token: write
 
     steps:
       - name: Download packages built by build-and-inspect-python-package

.github/workflows/zizmor.yml

@@ -0,0 +1,38 @@
+# https://github.com/woodruffw/zizmor
+name: Zizmor
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["*"]
+
+permissions:
+  contents: read
+
+
+jobs:
+  zizmor:
+    name: Zizmor latest via Cargo
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - name: Setup Rust
+        uses: actions-rust-lang/setup-rust-toolchain@v1
+      - name: Get zizmor
+        run: cargo install zizmor
+      - name: Run zizmor
+        run: zizmor --format sarif . > results.sarif
+      - name: Upload SARIF file
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          # Path to SARIF file relative to the root of the repository
+          sarif_file: results.sarif
+          # Optional category for the results
+          # Used to differentiate multiple results for one commit
+          category: zizmor