From e12d7cca4238d74474c4494c2cd00f4f49c95c9d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mickae=CC=88l=20Menu?= <mickael.menu@gmail.com>
Date: Sat, 13 Feb 2021 21:07:06 +0100
Subject: [PATCH] Prevent recursive aliases

---
 main.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/main.go b/main.go
index 00df93a..166d4fe 100644
--- a/main.go
+++ b/main.go
@@ -106,12 +106,16 @@ func indexZk(container *cmd.Container) {
 
 // runAlias will execute a user alias if the command is one of them.
 func runAlias(container *cmd.Container, args []string) (bool, error) {
+	runningAlias := os.Getenv("ZK_RUNNING_ALIAS")
 	if zk, err := container.OpenZk(); err == nil && len(args) >= 1 {
 		for alias, cmdStr := range zk.Config.Aliases {
-			if alias != args[0] {
+			if alias == runningAlias || alias != args[0] {
 				continue
 			}
 
+			// Prevent infinite loop if an alias calls itself.
+			os.Setenv("ZK_RUNNING_ALIAS", alias)
+
 			cmd := executil.CommandFromString(cmdStr, args[1:]...)
 			cmd.Stdin = os.Stdin
 			cmd.Stdout = os.Stdout