From 0f6836701d82a2ee024153c7f781bb72c2e9a8ac Mon Sep 17 00:00:00 2001
From: Marc Cornellà <marc.cornella@live.com>
Date: Thu, 31 Dec 2020 23:20:24 +0100
Subject: fix(CLI): properly get zsh command in `omz update` (#9558)

Zsh versions older than 5.3 don't have ZSH_ARGZERO, so use an alternative
method to get the zsh command.

Fixes #9558
---
 lib/cli.zsh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'lib/cli.zsh')

diff --git a/lib/cli.zsh b/lib/cli.zsh
index 92d447a8e..6fcffdf87 100644
--- a/lib/cli.zsh
+++ b/lib/cli.zsh
@@ -391,7 +391,9 @@ function _omz::update {
 
   # Restart the zsh session
   if [[ $ret -eq 0 && "$1" != --unattended ]]; then
+    # Old zsh versions don't have ZSH_ARGZERO
+    local zsh="${ZSH_ARGZERO:-${functrace[-1]%:*}}"
     # Check whether to run a login shell
-    [[ "$ZSH_ARGZERO" = -* ]] && exec -l "${ZSH_ARGZERO#-}" || exec "$ZSH_ARGZERO"
+    [[ "$zsh" = -* || -o login ]] && exec -l "${zsh#-}" || exec "$zsh"
   fi
 }
-- 
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