Adds Go Module support

Dockerfile

@@ -2,7 +2,7 @@ FROM ubuntu:xenial
 
 # Versioning
 ENV PIP_INSTALL_VERSION 10.0.1
-ENV GO_LANG_VERSION 1.10.2
+ENV GO_LANG_VERSION 1.11
 ENV MAVEN_VERSION 3.5.3
 ENV SBT_VERSION 1.1.1
 ENV GRADLE_VERSION 4.2

features/features/package_managers/dep_spec.rb

@@ -4,6 +4,7 @@
   let(:go_developer) { LicenseFinder::TestingDSL::User.new }
 
   specify 'are shown in reports for a project' do
+    ENV['DEPNOLOCK'] = '1'
     project = LicenseFinder::TestingDSL::DepProject.create
     ENV['GOPATH'] = "#{project.project_dir}/gopath_dep"
 

features/features/package_managers/go_modules_spec.rb

@@ -0,0 +1,13 @@
+require_relative '../../support/feature_helper'
+
+describe 'Go Modules Dependencies' do
+  let(:go_developer) { LicenseFinder::TestingDSL::User.new }
+
+  specify 'are shown in reports for a project' do
+    LicenseFinder::TestingDSL::GoModulesProject.create
+    go_developer.run_license_finder('go_modules')
+
+    expect(go_developer).to be_seeing_line 'gopkg.in/check.v1, v0.0.0-20161208181325-20d25e280405, "Apache 2.0, MIT"'
+    expect(go_developer).to be_seeing_line 'gopkg.in/yaml.v2, v2.2.1, "Apache 2.0, MIT"'
+  end
+end

features/fixtures/go_modules/go.mod

@@ -0,0 +1,3 @@
+module foo
+
+require gopkg.in/yaml.v2 v2.2.1

features/fixtures/go_modules/go.sum

@@ -0,0 +1,4 @@
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

features/fixtures/go_modules/main.go

@@ -0,0 +1,5 @@
+package foo
+
+import (
+	"gopkg.in/yaml.v2"
+)

features/support/testing_dsl.rb

@@ -222,6 +222,20 @@ def shell_out(command)
       end
     end
 
+    class GoModulesProject < Project
+      def add_dep
+        clone('go_modules')
+      end
+
+      def install
+        shell_out('go mod vendor')
+      end
+
+      def shell_out(command)
+        ProjectDir.new(Paths.root.join('tmp', 'projects', 'my_app', 'go_modules')).shell_out(command)
+      end
+    end
+
     class GlideProject < Project
       def add_dep
         clone('gopath_glide')

lib/license_finder/package_manager.rb

@@ -130,6 +130,7 @@ def log_to_file(contents)
 require 'license_finder/package_managers/gvt'
 require 'license_finder/package_managers/glide'
 require 'license_finder/package_managers/govendor'
+require 'license_finder/package_managers/go_modules'
 require 'license_finder/package_managers/bundler'
 require 'license_finder/package_managers/npm'
 require 'license_finder/package_managers/yarn'

lib/license_finder/package_managers/go_modules.rb

@@ -0,0 +1,52 @@
+module LicenseFinder
+  class GoModules < PackageManager
+    PACKAGES_FILE = 'go.sum'.freeze
+
+    class << self
+      def takes_priority_over
+        Go15VendorExperiment
+      end
+
+      def prepare_command
+        'go mod vendor'
+      end
+    end
+
+    def active?
+      sum_files?
+    end
+
+    def current_packages
+      sum_file_paths.uniq.map do |file_path|
+        read_sum(file_path)
+      end.flatten
+    end
+
+    private
+
+    def sum_files?
+      sum_file_paths.any?
+    end
+
+    def sum_file_paths
+      Dir[project_path.join(PACKAGES_FILE)]
+    end
+
+    def read_sum(file_path)
+      contents = File.read(file_path)
+      contents.each_line.map do |line|
+        line.include?('go.mod') ? nil : read_package(file_path, line)
+      end.compact
+    end
+
+    def read_package(file_path, line)
+      parts = line.split(' ')
+      install_path = File.dirname(file_path)
+
+      name = parts[0]
+      version = parts[1]
+
+      Package.new(name, version, install_path: install_path)
+    end
+  end
+end

lib/license_finder/scanner.rb

@@ -1,6 +1,6 @@
 module LicenseFinder
   class Scanner
-    PACKAGE_MANAGERS = [GoDep, GoWorkspace, Go15VendorExperiment, Glide, Gvt, Govendor, Dep, Bundler, NPM, Pip,
+    PACKAGE_MANAGERS = [GoModules, GoDep, GoWorkspace, Go15VendorExperiment, Glide, Gvt, Govendor, Dep, Bundler, NPM, Pip,
                         Yarn, Bower, Maven, Gradle, CocoaPods, Rebar, Nuget, Carthage, Mix, Conan, Sbt, Cargo].freeze
 
     def initialize(config = { project_path: Pathname.new('') })

spec/fixtures/config/go.sum

@@ -0,0 +1,4 @@
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

spec/lib/license_finder/package_managers/go_modules_spec.rb

@@ -0,0 +1,60 @@
+require 'spec_helper'
+require 'fakefs/spec_helpers'
+
+module LicenseFinder
+  describe GoModules do
+    it_behaves_like 'a PackageManager'
+
+    let(:src_path) { '/workspace/code' }
+    let(:sum_path) { "#{src_path}/go.sum" }
+    let(:vendor_path) { "#{src_path}/vendor" }
+
+    subject { GoModules.new(project_path: Pathname(src_path), logger: double(:logger, active: nil)) }
+
+    describe '#current_packages' do
+      before do
+        FakeFS.activate!
+      end
+
+      after do
+        FakeFS.deactivate!
+      end
+
+      let(:src_path) { '/workspace/code' }
+      let(:sum_path) { "#{src_path}/go.sum" }
+
+      let(:content) do
+        FakeFS.without do
+          fixture_from('go.sum')
+        end
+      end
+
+      it 'finds all the packages all go.sum files' do
+        FileUtils.mkdir_p(vendor_path)
+        File.write(sum_path, content)
+
+        packages = subject.current_packages
+
+        expect(packages.length).to eq 2
+
+        expect(packages.first.name).to eq 'gopkg.in/check.v1'
+        expect(packages.first.version).to eq 'v0.0.0-20161208181325-20d25e280405'
+
+        expect(packages.last.name).to eq 'gopkg.in/yaml.v2'
+        expect(packages.last.version).to eq 'v2.2.1'
+      end
+    end
+
+    describe '.prepare_command' do
+      it 'returns the correct package management command' do
+        expect(described_class.prepare_command).to eq('go mod vendor')
+      end
+    end
+
+    describe '.takes_priority_over' do
+      it 'returns the package manager it takes priority over' do
+        expect(described_class.takes_priority_over).to eq(Go15VendorExperiment)
+      end
+    end
+  end
+end