Add license checks CI job and permitted licenses

Author: vnovitskyi

.github/workflows/ci.yml

@@ -22,14 +22,29 @@ jobs:
       - name: Run tests
         run: bundle exec rspec
 
+  license_checks:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.3"
+          bundler: "2.5.19"
+          bundler-cache: true
+      - name: Check licenses
+        run: bundle exec license_finder
+
   summary:
     name: CI Summary
     runs-on: ubuntu-latest
     needs:
       - test
+      - license_checks
     if: always()
 
     steps:
       - name: Successful builds?
         run: |
           if ${{ needs.test.result != 'success' }}; then exit 1; fi
+          if ${{ needs.license_checks.result != 'success' }}; then exit 1; fi

.gitignore

@@ -3,7 +3,8 @@
 /Gemfile.lock
 /_yardoc/
 /coverage/
-/doc/
+/doc/*
+!/doc/dependency_decisions.yml
 /pkg/
 /spec/reports/
 /tmp/

Gemfile

@@ -5,6 +5,7 @@ source 'https://rubygems.org'
 gemspec
 
 group :test, :development do
+  gem 'license_finder', require: false
   gem 'rubocop'
   gem 'rubocop-performance'
   gem 'rubocop-rspec'

doc/dependency_decisions.yml

@@ -0,0 +1,31 @@
+---
+- - :permit
+  - Simplified BSD
+  - :who:
+    :why:
+    :versions: []
+    :when: 2026-05-07 08:46:22.982184000 Z
+- - :permit
+  - ruby
+  - :who:
+    :why:
+    :versions: []
+    :when: 2026-05-07 08:46:30.129551000 Z
+- - :permit
+  - MIT
+  - :who:
+    :why:
+    :versions: []
+    :when: 2026-05-07 08:46:37.221213000 Z
+- - :permit
+  - Apache 2.0
+  - :who:
+    :why:
+    :versions: []
+    :when: 2026-05-07 08:48:04.629903000 Z
+- - :permit
+  - LGPL
+  - :who:
+    :why:
+    :versions: []
+    :when: 2026-05-07 08:48:35.357986000 Z