From 58e62faa3d380dc61dc3be3ce78672081779c0fc Mon Sep 17 00:00:00 2001
From: Mario Hros <spam@k3a.me>
Date: Thu, 30 Mar 2017 20:32:39 +0200
Subject: [PATCH] required positional args

---
 parse.go | 3 +++
 usage.go | 8 +++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/parse.go b/parse.go
index 4f62c60..ecbb7e4 100644
--- a/parse.go
+++ b/parse.go
@@ -356,6 +356,9 @@ func process(specs []*spec, args []string) error {
 	for _, spec := range specs {
 		if spec.positional {
 			if spec.multiple {
+				if spec.required && len(positionals) == 0 {
+					return fmt.Errorf("%s is required", spec.long)
+				}
 				err := setSlice(spec.dest, positionals, true)
 				if err != nil {
 					return fmt.Errorf("error processing %s: %v", spec.long, err)
diff --git a/usage.go b/usage.go
index bf7fb83..4652b36 100644
--- a/usage.go
+++ b/usage.go
@@ -54,7 +54,13 @@ func (p *Parser) WriteUsage(w io.Writer) {
 		fmt.Fprint(w, " ")
 		up := strings.ToUpper(spec.long)
 		if spec.multiple {
-			fmt.Fprintf(w, "[%s [%s ...]]", up, up)
+			if !spec.required {
+				fmt.Fprint(w, "[")
+			}
+			fmt.Fprintf(w, "%s [%s ...]", up, up)
+			if !spec.required {
+				fmt.Fprint(w, "]")
+			}
 		} else {
 			fmt.Fprint(w, up)
 		}