Fixes gendoc (#430)

cmd/gendoc/main.go

@@ -19,17 +19,17 @@ import (
 )
 
 var (
-	expPkg     string
-	mdfname    string
+	inPath     string
+	outPath    string
 	mdf        *os.File
 	randSource = rand.NewSource(time.Now().UnixNano())
 	reGather   = regexp.MustCompile(`^(Gather)(.*)`)
 	reExample  = regexp.MustCompile(`^(Example)(.*)`)
 )
 
 func init() {
-	flag.StringVar(&expPkg, "gatherpkg", "gather", "Package where to find Gather methods")
-	flag.StringVar(&mdfname, "out", "gathered-data.md", "File to which MD doc will be generated")
+	flag.StringVar(&inPath, "in", "gatherers", "Package where to find Gather methods")
+	flag.StringVar(&outPath, "out", "gathered-data.md", "File to which MD doc will be generated")
 }
 
 type DocBlock struct {
@@ -40,7 +40,7 @@ type DocBlock struct {
 func main() {
 	flag.Parse()
 	var err error
-	mdf, err = os.Create(mdfname)
+	mdf, err = os.Create(outPath)
 	if err != nil {
 		fmt.Println(err)
 		return
@@ -63,7 +63,7 @@ func main() {
 		keys = append(keys, k)
 	}
 	sort.Strings(keys)
-	_, err = mdf.WriteString("This document is auto-generated by `make gen-doc`\n\n")
+	_, err = mdf.WriteString("This document is auto-generated by `make docs`\n\n")
 	if err != nil {
 		fmt.Print(err)
 	}
@@ -120,7 +120,7 @@ func walkDir(cleanRoot string, md map[string]*DocBlock) error {
 		}
 
 		for astPackageName, astPackage := range d {
-			if astPackageName != expPkg && expPath == "" {
+			if astPackageName != inPath && expPath == "" {
 				continue
 			}
 			if expPath == "" && len(astPackage.Files) > 0 {