Hardening

.github/workflows/ci.yml

@@ -6,6 +6,12 @@ concurrency:
   group: ${{ github.ref }}
   cancel-in-progress: true
 
+defaults:
+  run:
+    shell: bash
+
+permissions: {}
+
 jobs:
   lint:
     name: Lint
@@ -15,6 +21,8 @@ jobs:
     steps:
       - name: Check out source code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
 
       - name: Install Ruby and gems
         uses: ruby/setup-ruby@319994f95fa847cf3fb3cd3dbe89f6dcde9f178f # v1.295.0
@@ -35,6 +43,8 @@ jobs:
     steps:
       - name: Check out source code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
 
       - name: Install Ruby
         uses: ruby/setup-ruby@319994f95fa847cf3fb3cd3dbe89f6dcde9f178f # v1.295.0
@@ -57,7 +67,6 @@ jobs:
     runs-on: ubuntu-latest
 
     permissions:
-      contents: read
       id-token: write
 
     env:
@@ -69,6 +78,8 @@ jobs:
     steps:
       - name: Check out source code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
 
       - name: Install Ruby
         uses: ruby/setup-ruby@319994f95fa847cf3fb3cd3dbe89f6dcde9f178f # v1.295.0
@@ -124,6 +135,8 @@ jobs:
 
       - name: Check out source code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
 
       - name: Install Ruby and gems
         uses: ruby/setup-ruby@319994f95fa847cf3fb3cd3dbe89f6dcde9f178f # v1.295.0

.github/workflows/release.yml

@@ -0,0 +1,38 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - v*
+
+defaults:
+  run:
+    shell: bash
+
+permissions: {}
+
+jobs:
+  release:
+    name: Release
+
+    runs-on: ubuntu-latest
+
+    permissions:
+      id-token: write
+
+    steps:
+      - name: Check out source code
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Install Ruby
+        uses: ruby/setup-ruby@319994f95fa847cf3fb3cd3dbe89f6dcde9f178f # v1.295.0
+
+      - name: Install gems
+        run: |-
+          bin/bundle config set --local deployment true
+          bin/bundle install
+
+      - name: Release
+        uses: rubygems/release-gem@e9a6361a0b14562539327c2a02373edc56dd3169 # v1.1.4

.github/workflows/zizmor.yml

@@ -0,0 +1,34 @@
+name: Audit GitHub Actions security
+
+on:
+  pull_request:
+    branches:
+      - main
+
+  push:
+    branches:
+      - main
+
+defaults:
+  run:
+    shell: bash
+
+permissions: {}
+
+jobs:
+  zizmor:
+    name: Audit GitHub Actions security
+
+    runs-on: ubuntu-latest
+
+    permissions:
+      security-events: write
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Run zizmor
+        uses: zizmorcore/zizmor-action@71321a20a9ded102f6e9ce5718a2fcec2c4f70d8 # v0.5.2

Gemfile.lock

@@ -364,4 +364,4 @@ CHECKSUMS
   zeitwerk (2.7.5) sha256=d8da92128c09ea6ec62c949011b00ed4a20242b255293dd66bf41545398f73dd
 
 BUNDLED WITH
-  4.0.6
+  4.0.9

zizmor.yml

@@ -0,0 +1,6 @@
+rules:
+  secrets-outside-env:
+    disable: true
+  template-injection:
+    ignore:
+      - ci.yml