doc/bash completions autogeneration directory helper

cmd/genbashcomp/gen_kubectl_bash_comp.go

@@ -20,39 +20,28 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
-	"path/filepath"
 
+	"github.com/GoogleCloudPlatform/kubernetes/cmd/genutils"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl/cmd"
 	cmdutil "github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl/cmd/util"
 )
 
 func main() {
 	// use os.Args instead of "flags" because "flags" will mess up the man pages!
-	outDir := "contrib/completions/bash/"
+	path := "contrib/completions/bash/"
 	if len(os.Args) == 2 {
-		outDir = os.Args[1]
+		path = os.Args[1]
 	} else if len(os.Args) > 2 {
 		fmt.Fprintf(os.Stderr, "usage: %s [output directory]\n", os.Args[0])
 		os.Exit(1)
 	}
 
-	outDir, err := filepath.Abs(outDir)
+	outDir, err := genutils.OutDir(path)
 	if err != nil {
-		fmt.Fprintf(os.Stderr, err.Error())
+		fmt.Fprintf(os.Stderr, "failed to get output directory: %v\n", err)
 		os.Exit(1)
 	}
-
-	stat, err := os.Stat(outDir)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "output directory %s does not exist\n", outDir)
-		os.Exit(1)
-	}
-
-	if !stat.IsDir() {
-		fmt.Fprintf(os.Stderr, "output directory %s is not a directory\n", outDir)
-		os.Exit(1)
-	}
-	outFile := outDir + "/kubectl"
+	outFile := outDir + "kubectl"
 
 	//TODO os.Stdin should really be something like ioutil.Discard, but a Reader
 	kubectl := cmd.NewKubectlCommand(cmdutil.NewFactory(nil), os.Stdin, ioutil.Discard, ioutil.Discard)