Implemented warning if destination directory exists

Author: Knetic

RunSettings.go

@@ -20,6 +20,7 @@ type RunSettings struct {
 	inspectionRun bool
 	addRegistry   bool
 	showRegistry  bool
+	forceGenerate bool
 }
 
 /*
@@ -35,6 +36,7 @@ func FindRunSettings() (RunSettings, error) {
 	flag.BoolVar(&ret.inspectionRun, "i", false, "Whether or not to show a list of available parameters for the skeleton")
 	flag.BoolVar(&ret.addRegistry, "a", false, "Whether or not to register the template at the given path")
 	flag.BoolVar(&ret.showRegistry, "l", false, "Whether or not to show a list of all available registered templates")
+	flag.BoolVar(&ret.forceGenerate, "f", false, "Whether or not to overwrite existing files during generation")
 	flag.Parse()
 
 	ret.skeletonPath = flag.Arg(0)

main.go

@@ -99,6 +99,16 @@ func createProject(settings RunSettings, registry *TemplateRegistry) {
 		return
 	}
 
+	// if force wasn't specified, check to see if the destination already exists
+	if(!settings.forceGenerate) {
+
+		_, err = os.Stat(settings.targetPath)
+		if(err == nil) {
+			fmt.Println("Destination path already exists, and no '-f' option was specified. Use '-f' to overwrite existing files.")
+			return
+		}
+	}
+
 	// generate a project
 	err = project.GenerateAt(settings.targetPath, settings.parameters)
 	if err != nil {