From 84ddf1d244f4bbe299f082e1c880c34831f49c57 Mon Sep 17 00:00:00 2001
From: James Shubin <james@shubin.ca>
Date: Wed, 28 Feb 2024 22:29:16 -0500
Subject: [PATCH] add an example for environment vars with arg names

If you want to specify both of these, and if they should have different
names, then this shows you how it can be done.
---
 README.md | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/README.md b/README.md
index f105b17..3ea28cc 100644
--- a/README.md
+++ b/README.md
@@ -120,6 +120,23 @@ $ WORKERS='1,99' ./example
 Workers: [1 99]
 ```
 
+You can also have an environment variable that doesn't match the arg name:
+
+```go
+var args struct {
+	Workers int `arg:"--count,env:NUM_WORKERS"`
+}
+arg.MustParse(&args)
+fmt.Println("Workers:", args.Workers)
+```
+
+```
+$ NUM_WORKERS=6 ./example
+Workers: 6
+$ NUM_WORKERS=6 ./example --count 4
+Workers: 4
+```
+
 ### Usage strings
 ```go
 var args struct {