From 8dfd5378c087967dd66bbe3434a26251b213ba7a Mon Sep 17 00:00:00 2001
From: Roy Olav Purser <admin@royolav.net>
Date: Fri, 18 Jun 2021 14:19:53 +0200
Subject: [PATCH] help function

---
 envconf.go | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/envconf.go b/envconf.go
index 55a1e7d..5be7080 100644
--- a/envconf.go
+++ b/envconf.go
@@ -117,6 +117,29 @@ func (c *Config) Parse() {
 	}
 }
 
+func (c *Config) Help() {
+	max := 0
+	for k, v := range c.env {
+		if v.dtype != TypeNone {
+			if len(k) > max {
+				max = len(k)
+			}
+			if len(v.dtype.String()) > max {
+				max = len(v.dtype.String())
+			}
+			if len(v.value) > max {
+				max = len(v.value)
+			}
+		}
+	}
+	for k, v := range c.env {
+		if v.dtype != TypeNone {
+			format := fmt.Sprintf("Variable %%%ds|Type %%%ds|Default %%s\n", max, max)
+			fmt.Printf(format, k, v.dtype, v.value)
+		}
+	}
+}
+
 // Status prints out failures that occured while parsing the environment to os.Stderr.
 // Variables that have been defined without a default value and are
 // missing from the environment will be considered a failure.