1 files changed, 50 insertions, 0 deletions
diff --git a/lib/license/finder/ext/gradle.rb b/lib/license/finder/ext/gradle.rb
new file mode 100644
index 0000000..2c3ce01
--- /dev/null
+++ b/lib/license/finder/ext/gradle.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+module LicenseFinder
+  class Gradle
+    def current_packages
+      return [] unless download_licenses
+
+      Pathname
+        .glob(project_path.join('**', 'dependency-license.xml'))
+        .map(&:read)
+        .flat_map { |xml_file| parse_from(xml_file) }.uniq
+    end
+
+    def package_management_command
+      wrapper? ? './gradlew' : 'gradle'
+    end
+
+    private
+
+    def download_licenses
+      _stdout, _stderr, status = Dir.chdir(project_path) do
+        shell.execute([
+          @command,
+          ENV.fetch('GRADLE_CLI_OPTS', '--exclude-task=test'),
+          'downloadLicenses'
+        ], env: { 'TERM' => 'noop' })
+      end
+
+      status.success?
+    end
+
+    def wrapper?
+      File.exist?(File.join(project_path, 'gradlew'))
+    end
+
+    def xml_parsing_options
+      @xml_parsing_options ||= { 'GroupTags' => { 'dependencies' => 'dependency' } }
+    end
+
+    def parse_from(xml_file)
+      XmlSimple
+        .xml_in(xml_file, xml_parsing_options)
+        .fetch('dependency', []).map { |hash| map_from(hash) }
+    end
+
+    def map_from(hash)
+      GradlePackage.new(hash, include_groups: @include_groups)
+    end
+  end
+end