Harden GitHub workflows

.github/dependabot.yml

@@ -1,16 +1,20 @@
 version: 2
 updates:
-    # Maintain dependencies for GitHub Actions.
-    - package-ecosystem: "github-actions"
-      directory: "/"
-      schedule:
-          interval: "daily"
-      # Too noisy. See https://github.community/t/increase-if-necessary-for-github-actions-in-dependabot/179581
-      open-pull-requests-limit: 0
+  # Maintain dependencies for GitHub Actions.
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    cooldown:
+      default-days: 7
+    ignore:
+      - dependency-name: "yiisoft/*"
 
-    # Maintain dependencies for Composer
-    - package-ecosystem: "composer"
-      directory: "/"
-      schedule:
-          interval: "daily"
-      versioning-strategy: increase-if-necessary
+  # Maintain dependencies for Composer
+  - package-ecosystem: "composer"
+    directory: "/"
+    schedule:
+        interval: "daily"
+    versioning-strategy: increase-if-necessary
+    cooldown:
+      default-days: 7

.github/workflows/build.yml

@@ -40,10 +40,12 @@ jobs:
 
     steps:
       - name: Checkout.
-        uses: actions/checkout@v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        with:
+          persist-credentials: false
 
       - name: Install PHP with extensions.
-        uses: shivammathur/setup-php@v2
+        uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 # v2
         with:
           php-version: ${{ matrix.php }}
           ini-values: date.timezone='UTC', pcov.directory=$GITHUB_WORKSPACE, pcov.exclude=#^(?!($GITHUB_WORKSPACE/config/|$GITHUB_WORKSPACE/src/)).*#
@@ -60,7 +62,7 @@ jobs:
 
       - name: Upload coverage to Codecov.
         if: matrix.php == '8.5'
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@0fb7174895f61a3b6b78fc075e0cd60383518dac # v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ./coverage.xml

.github/workflows/rector-cs.yml

@@ -13,14 +13,16 @@ on:
       - '.php-cs-fixer.dist.php'
 
 permissions:
-  contents: write
+  contents: read
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
 jobs:
   rector:
+    permissions:
+      contents: write # Required to push PHP CS Fixer and Rector changes back to the branch.
     uses: yiisoft/actions/.github/workflows/rector-cs.yml@master
     with:
       php: 8.1

.github/workflows/zizmor.yml

@@ -0,0 +1,22 @@
+name: GitHub Actions Security Analysis with zizmor 🌈
+
+on:
+  push:
+    branches:
+      - master
+      - main
+    paths:
+      - '.github/**.yml'
+      - '.github/**.yaml'
+  pull_request:
+    paths:
+      - '.github/**.yml'
+      - '.github/**.yaml'
+
+permissions:
+  actions: read # Required by zizmor when reading workflow metadata through the API.
+  contents: read # Required to read workflow files.
+
+jobs:
+  zizmor:
+    uses: yiisoft/actions/.github/workflows/zizmor.yml@master