lock PROJECT_DIR during git sync, needed for parallel builds

1 files changed, 23 insertions, 1 deletions

diff --git a/bin/build-deb-package b/bin/build-deb-package
index 0ab5ee1..445411d 100755
--- a/bin/build-deb-package
+++ b/bin/build-deb-package
@@ -86,6 +86,9 @@ set_vars() {
 	EXTRA_ARCHS="${EXTRA_ARCHS:-}"
 	EXTRA_ARCHS_ONLY="${EXTRA_ARCHS_ONLY:-}"
 
+	# lock file
+	LOCK_FILE=$PROJECT_DIR/../.$PROJECT.lock
+
 	# creating paths
 	mkdir -p "$TEMP_BASE"
 	mkdir -p "$PROJECT_DIR"
@@ -120,7 +123,6 @@ prepare_workspace() {
 	cd "$PROJECT_DIR"
 
 	# by default we build for all current debian versions
-	echo "HIIIIIIEEEEEERR: $ARGV2_CODENAME"
 	if [ "x$ARGV2_CODENAME" != "x" ]; then
 		if echo "$DEBIAN_DISTROS" | grep $ARGV2_CODENAME >/dev/null; then
 			DEB_BUILD_FOR="debian:$ARGV2_CODENAME"
@@ -311,14 +313,34 @@ upload_packages() {
 	return 0
 }
 
+wait_for_lock() {
+	while $LOCK_FILE; do
+		pid=$(head -n1 $LOCK_FILE)
+		if ! ps $pid 1>/dev/null; then rm -f $LOCK_FILE
+		else echo "PROJECT directory is locked, sleeping for 10 secs..."
+		sleep 10
+	done
+}
+
+lock_workspace() {
+	wait_for_lock
+	echo $$ > $LOCK_FILE
+}
+
+unlock_workspace() {
+	rm -f $LOCK_FILE
+}
+
 ### MAIN ###
 set_vars $@ && {
 	if [ "x$(basename $0)" = "x$PREFIX-build-deb-package" ] || [ "x$(basename $0)" = "x$PREFIX-build+upload-deb-package" ]; then
 		cd $PROJECT_DIR && pkgneedsbuild $CHECKOUT || [ "$FORCE_BUILD" = "yes" ] && {
+			lock_workspace
 			prepare_workspace && {
 				clear_pkgdist
 				build_packages
 			}
+			unlock_workspace
 		}
 	fi
 	if [ "x$(basename $0)" = "x$PREFIX-upload-deb-package" ] || [ "x$(basename $0)" = "x$PREFIX-build+upload-deb-package" ]; then