added ability to specify cgo in metadata

metadata.json

@@ -1,5 +1,5 @@
 {
-  "version": "2.2.1",
+  "version": "2.3.0",
   "package": "github.com/nikogura/gomason",
   "description": "A tool for testing, building, signing, and publishing your project from a clean workspace.",
   "repository": "http://localhost:8081/artifactory/generic-local",

pkg/gomason/building.go

@@ -98,7 +98,14 @@ func Build(gopath string, meta Metadata, branch string, verbose bool) (err error
 	// This gets weird because go's exec shell doesn't like the arg format that gox expects
 	// Building it thusly keeps the various quoting levels straight
 
-	args := gox + ` -osarch="` + targetstring + `"` + " ./..."
+	cgo := ""
+
+	// build with cgo if we're told to do so.
+	if meta.BuildInfo.Cgo {
+		cgo = " -cgo"
+	}
+
+	args := gox + cgo + ` -osarch="` + targetstring + `"` + " ./..."
 
 	// Calling it through sh makes everything happy
 	cmd := exec.Command("sh", "-c", args)

pkg/gomason/gomason.go

@@ -33,6 +33,7 @@ type Metadata struct {
 type BuildInfo struct {
 	Targets []string        `json:"targets,omitempty"`
 	Extras  []ExtraArtifact `json:"extras,omitempty"`
+	Cgo     bool            `json:"cgo,omitempty"`
 }
 
 // ExtraArtifact is an extra file built from a template at build time