Harden GitHub workflows

.github/dependabot.yml

@@ -4,13 +4,17 @@ updates:
   - 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
+      interval: "weekly"
+    cooldown:
+      default-days: 7
+    ignore:
+      - dependency-name: "yiisoft/*"
 
   # Maintain dependencies for Composer
   - package-ecosystem: "composer"
     directory: "/"
     schedule:
       interval: "daily"
+    cooldown:
+      default-days: 7
     versioning-strategy: increase-if-necessary

.github/workflows/bc.yml

@@ -23,6 +23,9 @@ on:
 
 name: backwards compatibility
 
+permissions:
+  contents: read
+
 jobs:
   roave_bc_check:
     uses: yiisoft/actions/.github/workflows/bc.yml@master

.github/workflows/build.yml

@@ -22,6 +22,9 @@ on:
 
 name: build
 
+permissions:
+  contents: read
+
 jobs:
   phpunit:
     uses: yiisoft/actions/.github/workflows/phpunit.yml@master

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

@@ -24,6 +24,9 @@ on:
 
 name: Composer require checker
 
+permissions:
+  contents: read
+
 jobs:
   composer-require-checker:
     uses: yiisoft/actions/.github/workflows/composer-require-checker.yml@master

.github/workflows/mutation.yml

@@ -20,6 +20,9 @@ on:
 
 name: mutation test
 
+permissions:
+  contents: read
+
 jobs:
   mutation:
     uses: yiisoft/actions/.github/workflows/roave-infection.yml@master

.github/workflows/rector-cs.yml

@@ -11,14 +11,16 @@ 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/static.yml

@@ -22,6 +22,9 @@ on:
 
 name: static analysis
 
+permissions:
+  contents: read
+
 jobs:
   psalm:
     uses: yiisoft/actions/.github/workflows/psalm.yml@master

.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