[ci, tools] working find-unused-strings, android strings CI (#3036)

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3036

1 files changed, 6 insertions, 3 deletions

diff --git a/tools/optimize-assets.sh b/tools/optimize-assets.sh
index 598052b70c..70fa2375a5 100755
--- a/tools/optimize-assets.sh
+++ b/tools/optimize-assets.sh
@@ -1,7 +1,10 @@
 #!/bin/sh -e
+
 # SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
 # SPDX-License-Identifier: GPL-3.0-or-later
+
 which optipng || exit
-NPROC=$(nproc)
-[ -z "$NPROC" ] && NPROC=8
-find . -type f -iname '*.png' | xargs -P $NPROC -I {} optipng -o7 {}
+NPROC=$(nproc 2>/dev/null || getconf _NPROCESSORS_ONLN 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || echo 4)
+
+# shellcheck disable=SC2038
+find . -type f -iname '*.png' | xargs -P "$NPROC" -I {} optipng -o7 {}