Self-documenting makefile

Makefile

@@ -1,23 +1,26 @@
 .PHONY: *
 
-build:
+help: ## display this help
+	@awk 'BEGIN{FS = ":.*##"; printf "\033[1m\nUsage\n \033[1;92m make\033[0;36m <target>\033[0m\n"} /^[a-zA-Z0-9_-]+:.*?##/ { printf "  \033[36m%-15s\033[0m %s\n", $$1, $$2 } ' $(MAKEFILE_LIST)
+
+build: ## compile src/ into out/ with pagefind
 	./build.py out/ --draft
 	pagefind --site out/
 
-clean:
+clean: ## delete out/ and src/
 	test -e out && rm -rf out || true
 	test -e srv && rm -rf srv || true
 
-watch:
+watch: ## rebuild on changes
 	while inotifywait -r -e modify -e move -e create -e delete build.py Makefile src/; do make build; done
 
-serve:
+serve: ## serve out/
 	python -m http.server --directory out/
 
-pubdate:
+pubdate: ## Replace "pubdate: now" with the current date
 	sed -i "s/pubdate: now/pubdate: $$(date -Isec)/" src/blog/**/*.md
 
-upload:
+upload: ## build to srv/ and upload to www.alogoulogoi.com
 	test -e srv && rm -rf srv || true
 	./build.py srv/
 	pagefind --site srv/

flake.nix

@@ -23,12 +23,7 @@
           pkgs.pagefind
         ];
         shellHook = ''
-          echo "make build - compile src/ into out/ with pagefind"
-          echo "make clean - delete out/ and srv/"
-          echo "make watch - rebuild on changes"
-          echo "make serve - serve out/"
-          echo "make pubdate - replace 'now' with the current date"
-          echo "make upload - build to srv/ and upload to alogoulogoi"
+          make help
         '';
       };
     };