👍 Add last option to build command

lib/circleci/cli.rb

@@ -36,6 +36,7 @@ def builds
       desc 'build', 'show build description'
       method_option :project, aliases: 'p', type: :string, banner: 'user/project'
       method_option :build, aliases: 'n', type: :numeric, banner: 'build-number'
+      method_option :last, aliases: 'l', type: :boolean, banner: 'get last build'
       def build
         Command::BuildCommand.run(options)
       end

lib/circleci/cli/command/build_command.rb

@@ -8,10 +8,26 @@ class << self
           def run(options)
             setup_token
             username, reponame = project_name(options).split('/')
-            number = build_number(options)
-            build = Response::Build.get(username, reponame, number)
+            build =
+              if options.last
+                get_last_build(username, reponame)
+              else
+                get_build(username, reponame, options)
+              end
             say Printer::StepPrinter.new(build.steps).to_s
           end
+
+          private
+
+          def get_build(username, reponame, options)
+            number = build_number(options)
+            Response::Build.get(username, reponame, number)
+          end
+
+          def get_last_build(username, reponame)
+            builds = Response::Build.all(username, reponame)
+            Response::Build.get(username, reponame, builds.map(&:build_number).max)
+          end
         end
       end
     end

spec/circler/command/build_command_spec.rb

@@ -46,4 +46,10 @@
     it_behaves_like 'a command asks project name'
     it_behaves_like 'a command show build information'
   end
+
+  context 'with last option' do
+    let(:options) { OpenStruct.new(project: 'unhappychoice/Circler', branch: nil, last: true) }
+
+    it_behaves_like 'a command show build information'
+  end
 end