Autolink package names in composer.json

lib/gitlab/dependency_linker.rb

@@ -4,6 +4,7 @@ module Gitlab
       GemfileLinker,
       GemspecLinker,
       PackageJsonLinker,
+      ComposerJsonLinker,
     ].freeze
 
     def self.linker(blob_name)

lib/gitlab/dependency_linker/composer_json_linker.rb

@@ -0,0 +1,18 @@
+module Gitlab
+  module DependencyLinker
+    class ComposerJsonLinker < PackageJsonLinker
+      self.file_type = :composer_json
+
+      private
+
+      def link_packages
+        link_packages_at_key("require", &method(:package_url))
+        link_packages_at_key("require-dev", &method(:package_url))
+      end
+
+      def package_url(name)
+        "https://packagist.org/packages/#{name}" if name =~ %r{\A#{REPO_REGEX}\z}
+      end
+    end
+  end
+end

spec/lib/gitlab/dependency_linker/composer_json_linker_spec.rb

@@ -0,0 +1,82 @@
+require 'rails_helper'
+
+describe Gitlab::DependencyLinker::ComposerJsonLinker, lib: true do
+  describe '.support?' do
+    it 'supports composer.json' do
+      expect(described_class.support?('composer.json')).to be_truthy
+    end
+
+    it 'does not support other files' do
+      expect(described_class.support?('composer.json.example')).to be_falsey
+    end
+  end
+
+  describe '#link' do
+    let(:file_name) { "composer.json" }
+
+    let(:file_content) do
+      <<-CONTENT.strip_heredoc
+        {
+          "name": "laravel/laravel",
+          "homepage": "https://laravel.com/",
+          "description": "The Laravel Framework.",
+          "keywords": ["framework", "laravel"],
+          "license": "MIT",
+          "type": "project",
+          "repositories": [
+            {
+              "type": "git",
+              "url": "https://github.com/laravel/laravel.git"
+            }
+          ],
+          "require": {
+            "php": ">=5.5.9",
+            "laravel/framework": "5.2.*"
+          },
+          "require-dev": {
+            "fzaninotto/faker": "~1.4",
+            "mockery/mockery": "0.9.*",
+            "phpunit/phpunit": "~4.0",
+            "symfony/css-selector": "2.8.*|3.0.*",
+            "symfony/dom-crawler": "2.8.*|3.0.*"
+          }
+        }
+      CONTENT
+    end
+
+    subject { Gitlab::Highlight.highlight(file_name, file_content) }
+
+    def link(name, url)
+      %{<a href="#{url}" rel="nofollow noreferrer noopener" target="_blank">#{name}</a>}
+    end
+
+    it 'links the module name' do
+      expect(subject).to include(link('laravel/laravel', 'https://packagist.org/packages/laravel/laravel'))
+    end
+
+    it 'links the homepage' do
+      expect(subject).to include(link('https://laravel.com/', 'https://laravel.com/'))
+    end
+
+    it 'links the repository URL' do
+      expect(subject).to include(link('https://github.com/laravel/laravel.git', 'https://github.com/laravel/laravel.git'))
+    end
+
+    it 'links the license' do
+      expect(subject).to include(link('MIT', 'http://choosealicense.com/licenses/mit/'))
+    end
+
+    it 'links dependencies' do
+      expect(subject).to include(link('laravel/framework', 'https://packagist.org/packages/laravel/framework'))
+      expect(subject).to include(link('fzaninotto/faker', 'https://packagist.org/packages/fzaninotto/faker'))
+      expect(subject).to include(link('mockery/mockery', 'https://packagist.org/packages/mockery/mockery'))
+      expect(subject).to include(link('phpunit/phpunit', 'https://packagist.org/packages/phpunit/phpunit'))
+      expect(subject).to include(link('symfony/css-selector', 'https://packagist.org/packages/symfony/css-selector'))
+      expect(subject).to include(link('symfony/dom-crawler', 'https://packagist.org/packages/symfony/dom-crawler'))
+    end
+
+    it 'does not link core dependencies' do
+      expect(subject).not_to include(link('php', 'https://packagist.org/packages/php'))
+    end
+  end
+end

spec/lib/gitlab/dependency_linker_spec.rb

@@ -25,5 +25,13 @@ describe Gitlab::DependencyLinker, lib: true do
 
       described_class.link(blob_name, nil, nil)
     end
+
+    it 'links using ComposerJsonLinker' do
+      blob_name = 'composer.json'
+
+      expect(described_class::ComposerJsonLinker).to receive(:link)
+
+      described_class.link(blob_name, nil, nil)
+    end
   end
 end