commit 53f2da6f0b864a3759d9acf760c321079e45dd86
from: Thomas Adam <thomas@xteddy.org>
date: Wed Sep 07 14:31:15 2022 UTC

portable: maintscript: wrap nproc

Wrap nproc for non-Linux systems so this script can run on, say,
FreeBSD.

commit - 769c6a981d7734fe920f59790dcca00819f03356
commit + 53f2da6f0b864a3759d9acf760c321079e45dd86
blob - 150fc8a96782fde711c03b2c9a75707d7e06e3aa
blob + 7819af6212cd5e10cb08b10fc7af82ebb38a8374
--- maintscripts/sync-upstream.sh
+++ maintscripts/sync-upstream.sh
@@ -10,6 +10,23 @@ die()
 	exit 1
 }
 
+# Wrap the nproc command found on Linux, to return the number of CPU cores.
+# On non-Linux systems, the same value can be found via sysctl.  For
+# everything else, just return "1".
+nproc()
+{
+	NPROCCMD="nproc"
+
+	command -v "$NPROCCMD" >/dev/null 2>&1 || {
+		NPROCCMD="sysctl -n hw.ncpu"
+	}
+
+	result="$(eval command $NPROCCMD)"
+	[ -z "$result" -o "$result" -le 0 ] && result="1"
+
+	echo "$result"
+}
+
 [ -z "$(git status --porcelain)" ] || die "Working tree is not clean"
 
 echo "Updating main from origin..."