Rewrite the Makefile so that only updated files to get rebuilt when make is run.

git-svn-id: svn+ssh://svn.gentoo.org/var/svnroot/devmanual/trunk@140 176d3534-300d-0410-8db8-84e73ed771c3

1 files changed, 16 insertions, 15 deletions

diff --git a/Makefile b/Makefile
index 0540b68..70e209a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,18 +1,19 @@
-all: transform
+text_files := $(shell find -name "text.xml" | sed -e "s/text.xml$$/index.html/")
+image_files := $(shell find -name "*.svg" | sed -e "s/svg$$/png/")
 
-clean:
-	@find -name "index.html" | xargs rm
-	@find -name "*.png" |grep -v icons | xargs rm
+all: $(text_files) $(image_files)
+
+%index.html : %text.xml
+	xsltproc devbook.xsl $< > $@ 
+
+# Someone should figure out a way to put this to the pattern
+index.html : text.xml
+	xsltproc devbook.xsl $< > $@ 
 
-transform:
-	@for file in $$(find -name text.xml) ; do \
-		htmlfile=$${file/text.xml/index.html} ; \
-		echo "Processing $${file} --> $${htmlfile}" ; \
-		xsltproc devbook.xsl $$file > $$htmlfile ; \
-	done
-	@for file in $$(find -name *.svg) ; do \
-		pngfile=$${file/.svg/.png} ; \
-		echo "Converting $${file} --> $${pngfile}" ; \
-		convert $$file $$pngfile ; \
-	done
+%.png : %.svg
+	convert $< $@
+
+clean:
+	@find . -name "*.png" -a \! -path "./icons/*" -exec rm -v {} +
+	@find . -name "index.html" -exec rm -v {} +