rpmgs: allow predownloaded-postinstall-hook out of npm install

bin/rpmgs

@@ -329,40 +329,43 @@ update_predownloaded()
 
 	cd $PSM || fatal
 
-	#### npm only part
-	info "Detected npm install hook, run npm install ..."
-
-	[ -s "./package.json" ] || fatal "$RGD/package.json is missed"
-
-	# CHECKME: drop postinstall due run dev scripts during install --production
-	# replace with fake commands?
 	if [ -s $RGD/.gear/predownloaded-preinstall-hook ] ; then
 		sh $RGD/.gear/predownloaded-preinstall-hook $MODE
+                COMMITMSG="update predownloaded-$MODE with a hook script"
 	fi
 
-	local COMMITMSG=''
-	#subst "s|.*postinstall.*||g" package.json
-	if [ "$MODE" = "production" ] ; then
-		a= npm install --production || fatal
-		COMMITMSG="update node_modules with npm install --production for $VERSION (see $SDNAME in .gear/rules)"
-	else
-		a= npm install || fatal
-		COMMITMSG="update node_modules with npm install for $VERSION (see $SDNAME in .gear/rules)"
-	fi
+	#### npm only part
+	if [ -s "./package.json" ] ; then
+    		info "Detected npm install hook, run npm install ..."
 
-	if [ -s $RGD/.gear/predownloaded-postinstall-hook ] ; then
-		sh $RGD/.gear/predownloaded-postinstall-hook $MODE
-	fi
+		# CHECKME: drop postinstall due run dev scripts during install --production
+		# replace with fake commands?
+
+		local COMMITMSG=''
+		#subst "s|.*postinstall.*||g" package.json
+		if [ "$MODE" = "production" ] ; then
+			a= npm install --production || fatal
+			COMMITMSG="update node_modules with npm install --production for $VERSION (see $SDNAME in .gear/rules)"
+		else
+			a= npm install || fatal
+			COMMITMSG="update node_modules with npm install for $VERSION (see $SDNAME in .gear/rules)"
+		fi
+
+		if [ -s $RGD/.gear/predownloaded-postinstall-hook ] ; then
+			sh $RGD/.gear/predownloaded-postinstall-hook $MODE
+		fi
 
-	a= npm prune
-	a= npm dedup
+		a= npm prune
+		a= npm dedup
 
-	# drop all exclude node_modules
-	# TODO: correct .* removing
-	rm -rf $(ls -1 | grep -v node_modules) .*
+		# drop all exclude node_modules
+		# TODO: correct .* removing
+		rm -rf $(ls -1 | grep -v node_modules) .*
 
-	#epm assure jq || fatal
-	#(cd node_modules && rm -rf $(jq -r -c '.devDependencies | keys[]' ../package.json))
+		#epm assure jq || fatal
+		#(cd node_modules && rm -rf $(jq -r -c '.devDependencies | keys[]' ../package.json))
+        fi
+        ### end of npm part
 
 	cd - >/dev/null