added the "html" target to Makefile; also added gen-html-index-*.pl to the dependency list in the build system.

Author: agentzh

Makefile

@@ -1,16 +1,19 @@
 ver=$(shell date +'%Y.%m.%d')
 
-.PHONY: all zhcn en clean
+.PHONY: all zhcn en clean html
 
 all: zhcn en
 
 zhcn:
 	$(MAKE) -f ebooks.mk lang=$@ lang2=cn src=zh-cn title="agentzh的Nginx教程（$(ver)版）"
-	$(MAKE) -f ebooks.mk
 
 en:
 	$(MAKE) -f ebooks.mk
 
+html:
+	$(MAKE) -f ebooks.mk lang=cn lang2=cn src=zh-cn title="agentzh的Nginx教程（$(ver)版）" html
+	$(MAKE) -f ebooks.mk html
+
 clean:
 	rm -rf html/ wiki/ index*.html *.mobi *.epub *.pdf agentzh-nginx-tutorials-*.html
 

ebooks.mk

@@ -47,8 +47,8 @@ html: $(name).html
 	    --title "$(title)" --publisher 'agentzh' \
 	    --language $(lang2) --authors 'agentzh'
 
-$(name).html: $(htmlfiles)
-	./utils/gen-html-index-$(lang2).pl -v $(ver) -o $@ $^
+$(name).html: $(htmlfiles) ./utils/gen-html-index-$(lang2).pl
+	./utils/gen-html-index-$(lang2).pl -v $(ver) -o $@ $(htmlfiles)
 
 html/%.html: wiki/%.wiki ./utils/wiki2html-$(lang2).pl
 	mkdir -p $(dir $@)