From 4de692c1eb1394aff41da8b05fff75bd74c7127c Mon Sep 17 00:00:00 2001
From: agmen <gavin@agmen2.co.uk>
Date: Tue, 5 Sep 2017 17:32:32 +0100
Subject: [PATCH] adding a GenZshCompletionFile function to mirror
 bash_completion (#529)

---
 zsh_completions.go | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/zsh_completions.go b/zsh_completions.go
index b350aee..62ebf4d 100644
--- a/zsh_completions.go
+++ b/zsh_completions.go
@@ -4,9 +4,21 @@ import (
 	"bytes"
 	"fmt"
 	"io"
+	"os"
 	"strings"
 )
 
+// GenZshCompletionFile generates zsh completion file.
+func (cmd *Command) GenZshCompletionFile(filename string) error {
+	outFile, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer outFile.Close()
+
+	return cmd.GenZshCompletion(outFile)
+}
+
 // GenZshCompletion generates a zsh completion file and writes to the passed writer.
 func (cmd *Command) GenZshCompletion(w io.Writer) error {
 	buf := new(bytes.Buffer)