Ensure Hugo is properly installed

Makefile

@@ -6,6 +6,7 @@ clean:
 	rm -rf public resources
 
 serve:
+	@./check_hugo.sh
 	hugo server \
 		--buildDrafts \
 		--buildFuture \
@@ -15,10 +16,12 @@ docker-serve:
 	docker run --rm -it -v $(CURDIR):/src -p 1313:1313 $(DOCKER_IMG) $(SERVE_CMD)
 
 production-build: clean
+	@./check_hugo.sh
 	hugo \
 		--minify
 
 preview-build: clean
+	@./check_hugo.sh
 	hugo \
 		--baseURL $(DEPLOY_PRIME_URL) \
 		--buildDrafts \

check_hugo.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+set -e
+
+command -v hugo >/dev/null || (echo "Hugo extended must be installed on your system." >/dev/stderr; exit 1)
+hugo version | grep -i extended >/dev/null || (echo "Your Hugo installation does not appear to be extended." >/dev/stderr; exit 1)