contrib/jenkins: skip upload if nothing new

Add the same behavior as in osmo-ccid-firmware
I3f70d6149b29ec2ff7f185dfae8bc8d4a1953dc2.

contrib/jenkins.sh

@@ -42,7 +42,20 @@ SSH_COMMAND="ssh -o 'UserKnownHostsFile=/tmp/known_hosts' -p 48"
 for proj in $PROJECTS; do
 	echo "=============== $proj UPLOAD =============="
 	cd "$TOPDIR/projects/$proj"
-	rsync --archive --copy-links --verbose --compress --delete --rsh "$SSH_COMMAND" ${proj}.{bin,elf,srec} binaries@ftp.osmocom.org:web-files/osmo-opencm3-projects/latest/
-	rsync --archive --verbose --compress --rsh "$SSH_COMMAND" ${proj}-*.{bin,elf,srec} binaries@ftp.osmocom.org:web-files/osmo-opencm3-projects/all/
+
+	LATEST_BIN="$(ls -1 -t "$proj"-*.bin | head -n1)"
+	echo "LATEST_BIN: $LATEST_BIN"
+
+	if rsync --rsh "$SSH_COMMAND" binaries@ftp.osmocom.org:web-files/osmo-opencm3-projects/all/ | grep -q "$LATEST_BIN"; then
+		echo "Skipping upload, $LATEST_BIN has already been uploaded."
+	else
+		rsync --archive --copy-links --verbose --compress --delete --rsh "$SSH_COMMAND" \
+			${proj}.{bin,elf,srec} \
+			binaries@ftp.osmocom.org:web-files/osmo-opencm3-projects/latest/
+		rsync --archive --verbose --compress --rsh "$SSH_COMMAND" \
+			${proj}-*.{bin,elf,srec} \
+			binaries@ftp.osmocom.org:web-files/osmo-opencm3-projects/all/
+	fi
+
 	echo "=============== $proj UPLOAD DONE =============="
 done