From f5fdc54d3a0845d0590c181d3bd6016f22765431 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Tue, 5 Feb 2019 10:42:30 +0100
Subject: [PATCH] guix-install.sh: Avoid "#!/bin/bash" shebang.
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Fixes <https://bugs.gnu.org/34279>.
Reported by Claes Wallin (韋嘉誠) <clacke@lysator.liu.se>.

* etc/guix-install.sh: Change shebang to #!/bin/sh and add 'if'
statement to spawn Bash if needed.
---
 etc/guix-install.sh | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/etc/guix-install.sh b/etc/guix-install.sh
index 8eb5214049..dc8de2fe92 100755
--- a/etc/guix-install.sh
+++ b/etc/guix-install.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 # GNU Guix --- Functional package management for GNU
 # Copyright © 2017 sharlatan <sharlatanus@gmail.com>
 # Copyright © 2018 Ricardo Wurmus <rekado@elephly.net>
@@ -19,6 +19,13 @@
 # You should have received a copy of the GNU General Public License
 # along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
 
+# We require Bash but for portability we'd rather not use /bin/bash or
+# /usr/bin/env in the shebang, hence this hack.
+if [ "x$BASH_VERSION" = "x" ]
+then
+    exec bash "$0" "$@"
+fi
+
 set -e
 
 [ "$UID" -eq 0 ] || { echo "This script must be run as root."; exit 1; }