steam-runtime-issue284.patch

From 4313d3755a182cf6dc5ca526549ecb5cd140fde5 Mon Sep 17 00:00:00 2001
From: Simon McVittie <smcv@collabora.com>
Date: Mon, 26 Oct 2020 13:27:55 +0000
Subject: [PATCH] _v2-entry-point: Check whether launch_args is empty before
 use

In newer versions of bash, an empty array counts as having been set,
and can be dereferenced as `"${array[@]}"` without triggering `set -u`.
However, in older versions, empty arrays count as being unset, and the
entry point script fails with `launch_args[@]: unbound variable`.

Resolves: https://github.com/ValveSoftware/steam-runtime/issues/284
Signed-off-by: Simon McVittie <smcv@collabora.com>
---
 depot/_v2-entry-point | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/depot/_v2-entry-point b/depot/_v2-entry-point
index 1466364..871b2a2 100755
--- a/depot/_v2-entry-point
+++ b/depot/_v2-entry-point
@@ -246,7 +246,7 @@ if [ -n "$is_main" ]; then
     fi
 
     launch_args=( \
-        "${launch_args[@]}" \
+        ${launch_args[0]+"${launch_args[@]}"} \
         --pass-env-matching '*' \
         --terminate \
     )
@@ -262,7 +262,7 @@ if [ -n "$is_main" ]; then
         "$@"
 else
     launch_args=( \
-        "${launch_args[@]}" \
+        ${launch_args[0]+"${launch_args[@]}"} \
         --unset-env LD_PRELOAD \
     )
 fi
@@ -270,7 +270,7 @@ fi
 exec "$pressure_vessel/bin/pressure-vessel-launch" \
     --directory="$(pwd)" \
     --socket="$rendezvous/socket" \
-    "${launch_args[@]}" \
+    ${launch_args[0]+"${launch_args[@]}"} \
     -- \
     "$@"
 exit 125
-- 
2.28.0