From e05517f9f795f988092ecf57c8af68f9d6bdd8d3 Mon Sep 17 00:00:00 2001
From: "Rico Sta. Cruz" <rstacruz@users.noreply.github.com>
Date: Wed, 27 Mar 2019 19:14:34 +0800
Subject: [PATCH] Show warning when binfiles aren't available

---
 Makefile | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 9f604ccfd..f94ac33f3 100644
--- a/Makefile
+++ b/Makefile
@@ -13,16 +13,24 @@ _site:
 critical: _site
 	node _support/critical.js
 
+ensure-bin:
+	@if [ ! -d $(npmbin) ]; then \
+		echo "---"; \
+		echo "Error: $(npmbin) not found, you may need to run '[docker-compose run --rm web] yarn install'."; \
+		echo "---"; \
+		exit 1; \
+		fi
+
 # Starts development server
-dev:
+dev: ensure-bin
 	$(npmbin)/concurrently -k -p command -c "blue,green" \
 		"make dev-webpack" \
 		"make dev-jekyll"
 
-dev-webpack:
+dev-webpack: ensure-bin
 	$(npmbin)/webpack --watch --colors -p
 
-dev-jekyll:
+dev-jekyll: ensure-bin
 	if [ -f _site ]; then \
 		bundle exec jekyll serve --safe --trace --drafts --watch --incremental --host $(HOST) --port $(PORT); \
 		else \