ValidateAppName: Nicer error message.

Matthieu Nottale · Matthieu Nottale · commit d86c5af29dc8 · 2018-04-23T14:35:19.000+02:00
Signed-off-by: Matthieu Nottale &lt;matthieu.nottale@docker.com&gt;
diff --git a/utils/names.go b/utils/names.go
@@ -28,7 +28,7 @@ func ValidateAppName(appName string) error {
 		return nil
 	}
 	return fmt.Errorf(
-		"invalid app name: %s ; app names must match the following regexp: %q",
+		"invalid app name: %s ; app names must start with a letter, and must contain only letters, numbers, '-' and '_' (regexp: %q)",
 		appName,
 		appNameRe.String(),
 	)

Original file line number	Diff line number	Diff line change
`@@ -28,7 +28,7 @@ func ValidateAppName(appName string) error {`
`28`	`28`	`return nil`
`29`	`29`	`}`
`30`	`30`	`return fmt.Errorf(`
`31`		`- "invalid app name: %s ; app names must match the following regexp: %q",`
	`31`	`+ "invalid app name: %s ; app names must start with a letter, and must contain only letters, numbers, '-' and '_' (regexp: %q)",`
`32`	`32`	`appName,`
`33`	`33`	`appNameRe.String(),`
`34`	`34`	`)`