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/bc.yml

@@ -13,6 +13,9 @@ on:
 
 name: backwards compatibility
 
+permissions:
+  contents: read
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true

.github/workflows/composer-require-checker.yml

@@ -16,6 +16,9 @@ on:
 
 name: Composer require checker
 
+permissions:
+  contents: read
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true

.github/workflows/mutation.yml

@@ -14,6 +14,9 @@
 
 name: mutation test
 
+permissions:
+  contents: read
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
@@ -38,7 +41,7 @@
 
     services:
       postgres:
         image: postgres:17
         env:
           POSTGRES_USER: root
           POSTGRES_PASSWORD: root
@@ -49,18 +52,20 @@
 
     steps:
       - name: Checkout.
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
+        with:
+          persist-credentials: false
 
       - name: Install PHP with extensions.
-        uses: shivammathur/setup-php@v2
+        uses: shivammathur/setup-php@b604ade2a87db23f8871b7182e69ec5e75effb45
         with:
           php-version: ${{ matrix.php }}
           extensions: ${{ env.EXTENSIONS }}
           ini-values: memory_limit=-1
           coverage: pcov
 
       - name: Install Composer dependencies
-        uses: ramsey/composer-install@v3
+        uses: ramsey/composer-install@a8d0d959dab41457692a5e2041bd9b757a119e3f
 
       - name: Install db.
         uses: yiisoft/actions/install-packages@master

.github/workflows/static.yml

@@ -16,6 +16,9 @@ on:
 
 name: Static analysis
 
+permissions:
+  contents: read
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true

.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