From def9a01dc60da9e45dcaa1f0a9e17cc455e9813b Mon Sep 17 00:00:00 2001
From: Yulian Kuncheff <yulian@kuncheff.com>
Date: Thu, 16 Feb 2023 11:55:44 -0800
Subject: [PATCH] Output Aliases when running `mage -l`

---
 mage/import_test.go |  3 +++
 mage/template.go    | 25 +++++++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/mage/import_test.go b/mage/import_test.go
index 83949b27..5adc8974 100644
--- a/mage/import_test.go
+++ b/mage/import_test.go
@@ -28,6 +28,9 @@ Targets:
   zz:buildSubdir2    Builds stuff.
   zz:ns:deploy2*     deploys stuff.
 
+Aliases:
+  nsd2    -> zz:ns:deploy2
+
 * default target
 `[1:]
 
diff --git a/mage/template.go b/mage/template.go
index af822f0f..83a1c102 100644
--- a/mage/template.go
+++ b/mage/template.go
@@ -237,6 +237,12 @@ Options:
 		{{- end}}
 		}
 
+		aliases := map[string]string{
+		{{- range $k, $v := .Aliases}}
+			"{{ lowerFirst $k }}": "-> {{lowerFirst $v.TargetName}}",
+		{{- end}}
+		}
+
 		keys := make([]string, 0, len(targets))
 		for name := range targets {
 			keys = append(keys, name)
@@ -248,6 +254,25 @@ Options:
 		for _, name := range keys {
 			_fmt.Fprintf(w, "  %v\t%v\n", printName(name), targets[name])
 		}
+
+		if len(aliases) != 0 {
+			err := w.Flush()
+			if err != nil {
+				return err
+			}
+		
+			aliasKeys := make([]string, 0, len(aliases))
+			for name := range aliases {
+				aliasKeys = append(aliasKeys, name)
+			}
+			_sort.Strings(aliasKeys)
+
+			_fmt.Println("\nAliases:")
+			for _, name := range aliasKeys {
+				_fmt.Fprintf(w, "  %v\t%v\n", printName(name), aliases[name])
+			}
+		}
+
 		err := w.Flush()
 		{{- if .DefaultFunc.Name}}
 			if err == nil {