parse flags in runner command, to be able to show version or help, closes #34

README.md

@@ -157,6 +157,10 @@ See implementation examples:
 
 ### Changes
 
+**2016-06-01**
+- parse flags in main command, to show version and help without needing
+  to compile test package and buildable go sources.
+
 **2016-05-28**
 - show nicely formatted called step func name and file path
 

cmd/godog/main.go

@@ -17,11 +17,11 @@ import (
 var statusMatch = regexp.MustCompile("^exit status (\\d+)")
 var parsedStatus int
 
+var stdout = createAnsiColorWriter(os.Stdout)
+var stderr = createAnsiColorWriter(statusOutputFilter(os.Stderr))
+
 func buildAndRun() (int, error) {
 	var status int
-	// will support Ansi colors for windows
-	stdout := createAnsiColorWriter(os.Stdout)
-	stderr := createAnsiColorWriter(statusOutputFilter(os.Stderr))
 
 	dir := fmt.Sprintf(filepath.Join("%s", "godog-%d"), os.TempDir(), time.Now().UnixNano())
 	err := godog.Build(dir)
@@ -75,9 +75,25 @@ func buildAndRun() (int, error) {
 }
 
 func main() {
+	var vers, defs, sof bool
+	var tags, format string
+	var concurrency int
+
+	flagSet := godog.FlagSet(&format, &tags, &defs, &sof, &vers, &concurrency)
+	err := flagSet.Parse(os.Args[1:])
+	if err != nil {
+		fmt.Fprintln(stderr, err)
+		os.Exit(1)
+	}
+
+	if vers {
+		fmt.Fprintln(stdout, "Godog version is", godog.Version)
+		os.Exit(0) // should it be 0?
+	}
+
 	status, err := buildAndRun()
 	if err != nil {
-		fmt.Fprintln(os.Stderr, err)
+		fmt.Fprintln(stderr, err)
 		os.Exit(1)
 	}
 	// it might be a case, that status might not be resolved

examples/api/version.feature

@@ -20,6 +20,6 @@ Feature: get version
     And the response should match json:
       """
       {
-        "version": "v0.4.2"
+        "version": "v0.4.3"
       }
       """

flags.go

@@ -5,7 +5,8 @@ import (
 	"fmt"
 )
 
-func flags(format, tags *string, defs, sof, vers *bool, cl *int) *flag.FlagSet {
+// FlagSet allows to manage flags by external suite runner
+func FlagSet(format, tags *string, defs, sof, vers *bool, cl *int) *flag.FlagSet {
 	set := flag.NewFlagSet("godog", flag.ExitOnError)
 	set.StringVar(format, "format", "pretty", "")
 	set.StringVar(format, "f", "pretty", "")
@@ -32,7 +33,10 @@ func usage() {
 
 	// --- GENERAL ---
 	fmt.Println(cl("Usage:", yellow))
-	fmt.Println(s(2) + "godog [options] [<features>]\n")
+	fmt.Printf(s(2) + "godog [options] [<features>]\n\n")
+	// description
+	fmt.Println("Builds a test package and runs given feature files.")
+	fmt.Printf("Command should be run from the directory of tested package and contain buildable go source.\n\n")
 
 	// --- ARGUMENTS ---
 	fmt.Println(cl("Arguments:", yellow))

godog.go

@@ -44,4 +44,4 @@ Godog was inspired by Behat and the above description is taken from it's documen
 package godog
 
 // Version of package - based on Semantic Versioning 2.0.0 http://semver.org/
-const Version = "v0.4.2"
+const Version = "v0.4.3"

run.go

@@ -56,7 +56,7 @@ func Run(contextInitializer func(suite *Suite)) int {
 	var vers, defs, sof bool
 	var tags, format string
 	var concurrency int
-	flagSet := flags(&format, &tags, &defs, &sof, &vers, &concurrency)
+	flagSet := FlagSet(&format, &tags, &defs, &sof, &vers, &concurrency)
 	err := flagSet.Parse(os.Args[1:])
 	fatal(err)