decomposed the "html" target into sub-targets

Author: koron

Makefile

@@ -3,20 +3,30 @@
 JEKYLL_WORKDIR=target/jekyll-work
 JEKYLL_OUTDIR=target/_site
 
-all:
-
-html:
-	rm -rf target/html
-	mkdir -p target/html/doc
-	if [ ! -d vim/runtime/doc ]; then git clone --depth=1 https://github.com/vim/vim.git; fi
-	if [ ! -d vim_faq/doc ]; then git clone --depth=1 https://github.com/chrisbra/vim_faq.git; fi
-	cd vim; git apply ../tools/add-vimfaq-link.diff; cd ..
-	cp vim/runtime/doc/*.txt vim_faq/doc/*.txt target/html/doc
+html-prepare: vim/runtime/doc vim_faq/doc target/html/doc
+	rm -f target/html/doc/*.txt
+	cp vim/runtime/doc/*.txt target/html/doc
+	cp vim_faq/doc/*.txt target/html/doc
+
+html: html-prepare
 	-cd target/html/doc ; vim -eu ../../../tools/buildhtml.vim -c "qall!"
 
+vim/runtime/doc:
+	git clone --depth=1 https://github.com/vim/vim.git
+	cd vim && git apply ../tools/add-vimfaq-link.diff
+
+vim_faq/doc:
+	git clone --depth=1 https://github.com/chrisbra/vim_faq.git
+
+target/html/doc:
+	mkdir -p $@
+
 clean:
 	rm -rf target
 
+distclean:
+	rm -rf vim vim_faq
+
 jekyll-build-prepare:
 	mkdir -p $(JEKYLL_WORKDIR)
 	cp target/html/doc/*.html $(JEKYLL_WORKDIR)