Merge pull request #1032 from chef/mimaslanka/add-go-builder

Add new DSL for GO to builder

README.md

@@ -194,6 +194,7 @@ DSL Method          | Description
 `patch`             | Apply a patch from disk
 `workers`           | The maximum number of builders
 `windows_safe_path` | Format the path to be safe for shelling out on Windows
+`go`                | Execute the code as the embedded Go
 `ruby`              | Execute the code as the embedded Ruby
 `gem`               | Execute the code as the embedded Rubygems
 `bundle`            | Execute the code as the embedded Bundler

lib/omnibus/builder.rb

@@ -296,6 +296,41 @@ def compiler_safe_path(*pieces)
     # @!endgroup
     # --------------------------------------------------
 
+    #
+    # @!group Go DSL methods
+    #
+    # The following DSL methods are available from within build blocks and
+    # expose Go DSL methods.
+    # --------------------------------------------------
+
+    #
+    # Execute the given Go command or script against the embedded Go.
+    #
+    # @example
+    #   go 'build -o hello'
+    #
+    # @param (see #command)
+    # @return (see #command)
+    #
+    def go(command, options = {})
+      build_commands << BuildCommand.new("go `#{command}'") do
+        bin = embedded_bin("go")
+
+        # Check if we are building a go binary and then check if we are on
+        # Red Hat or CentOS so we build the binary properly with a build-id
+        if command.start_with?("build", " build") && (rhel? || centos?)
+          command << " -ldflags=-linkmode=external"
+        end
+
+        shellout!("#{bin} #{command}", options)
+      end
+    end
+    expose :go
+
+    #
+    # @!endgroup
+    # --------------------------------------------------
+
     #
     # @!group Ruby DSL methods
     #

spec/unit/builder_spec.rb

@@ -39,6 +39,12 @@ def run_build_command
       end
     end
 
+    describe "#go" do
+      it "is a DSL method" do
+        expect(subject).to have_exposed_method(:go)
+      end
+    end
+
     describe "#ruby" do
       it "is a DSL method" do
         expect(subject).to have_exposed_method(:ruby)