builder: provide a friendly message on parser errors

Docker-DCO-1.1-Signed-off-by: Erik Hollensbe <[email protected]> (github: erikh)
crquan · Oct 15, 2014 · 3f2eb35 · 3f2eb35
1 parent 63637b9
commit 3f2eb35
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/builder/parser/utils.go b/builder/parser/utils.go
@@ -73,7 +73,7 @@ func splitCommand(line string) (string, string, error) {
 	cmdline := TOKEN_WHITESPACE.Split(line, 2)
 
 	if len(cmdline) != 2 {
-		return "", "", fmt.Errorf("We do not understand this file. Please ensure it is a valid Dockerfile.")
+		return "", "", fmt.Errorf("We do not understand this file. Please ensure it is a valid Dockerfile. Parser error at %q", line)
 	}
 
 	cmd := strings.ToLower(cmdline[0])