ci: Harden GitHub Actions

.github/workflows/build.yaml

@@ -1,5 +1,8 @@
 name: Building
 on: [push, pull_request]
+permissions:
+  contents: read
+
 jobs:
   build:
     name: Build

.github/workflows/codeql-analysis.yml

@@ -9,8 +9,15 @@ on:
   schedule:
     - cron: '10 6 * * 2'
 
+permissions:
+  contents: read
+
 jobs:
   analyze:
+    permissions:
+      actions: read  # for github/codeql-action/init to get workflow details
+      contents: read  # for actions/checkout to fetch code
+      security-events: write  # for github/codeql-action/autobuild to send a status report
     name: Analyze
     runs-on: ubuntu-latest
 

.github/workflows/docs.yaml

@@ -5,8 +5,13 @@ on:
 
 name: Generate docs
 
+permissions:
+  contents: read
+
 jobs:
   build:
+    permissions:
+      contents: write  # for Git to git push
     name: Release
     runs-on: ubuntu-latest
     steps:

.github/workflows/goreleaser-check.yaml

@@ -4,6 +4,9 @@ on:
     branches:
       - 'release-please--**'
 
+permissions:
+  contents: read
+
 jobs:
   verify-goreleaser:
     name: Check GoReleaser config

.github/workflows/linting.yaml

@@ -1,7 +1,13 @@
 name: reviewdog
 on: [pull_request]
+permissions:
+  contents: read
+
 jobs:
   golangci-lint:
+    permissions:
+      checks: write  # for reviewdog/action-golangci-lint to report issues using checks
+      contents: read  # for actions/checkout to fetch code
     name: golangci-lint
     runs-on: ubuntu-latest
     steps:

.github/workflows/readme.yaml

@@ -5,8 +5,13 @@ on:
 
 name: Generate readme
 
+permissions:
+  contents: read
+
 jobs:
   build:
+    permissions:
+      contents: write  # for Git to git push
     name: Release
     runs-on: ubuntu-latest
     steps:

.github/workflows/test-install.yaml

@@ -7,6 +7,9 @@ on:
       - .github/workflows/test-install.yaml
       - install.sh
 
+permissions:
+  contents: read
+
 jobs:
   test-install-sh:
     name: Test install.sh

.github/workflows/test.yaml

@@ -1,5 +1,8 @@
 name: Testing
 on: [push, pull_request]
+permissions:
+  contents: read
+
 jobs:
   build:
     name: Test