[PATCH iputils 2/6] doc: fix parallel build of html/man pages

[Mike Frysinger <vapier@gentoo.org>]

The use of the same tempdir prevents building of these files in parallel.
So build all of them in unique tempdirs so we can do them in parallel.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
 doc/Makefile | 37 ++++++++++++++++++++++++-------------
 1 file changed, 24 insertions(+), 13 deletions(-)

diff --git a/doc/Makefile b/doc/Makefile
index 7ec4f1c..4f930a3 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -12,29 +12,40 @@ man: $(MANFILES)
 # lots of some strange temporary junk directories and files.
 # So, scope it to a temporary dir and clean all after each run.
 
-$(HTMLFILES): index.db
-	@-rm -rf tmp.db2html
-	@mkdir tmp.db2html
-	@set -e; cd tmp.db2html; docbook2html ../$< ; mv *.html ..
-	@-rm -rf tmp.db2html
+SETUP_TMPDIR = \
+	t="tmp.db2html.$@"; \
+	rm -rf $$t; \
+	mkdir $$t; \
+	cd $$t
+CLEAN_TMPDIR = \
+	cd ..; \
+	rm -rf $$t
+
+MAKE_HTML = \
+	@set -e; \
+	$(SETUP_TMPDIR); \
+	docbook2html ../$<; \
+	mv *.html ..; \
+	$(CLEAN_TMPDIR)
 
+$(HTMLFILES): index.db
+	$(MAKE_HTML)
 iputils.html: iputils.db
-	@-rm -rf tmp.db2html
-	@mkdir tmp.db2html
-	@set -e; cd tmp.db2html; docbook2html -u -o html ../$< ; mv html/$@ ..
-	@-rm -rf tmp.db2html
+	$(MAKE_HTML)
 
 # docbook2man produces utterly ugly output and I did not find
 # any way to customize this but hacking backend perl script a little.
 # Well, hence...
 
 $(MANFILES): index.db
-	@-mkdir tmp.db2man
-	@set -e; cd tmp.db2man; nsgmls ../$< | sgmlspl ../docbook2man-spec.pl ;	mv $@ ..
-	@-rm -rf tmp.db2man
+	@set -e; \
+	$(SETUP_TMPDIR); \
+	nsgmls ../$< | sgmlspl ../docbook2man-spec.pl; \
+	mv $@ ..; \
+	$(CLEAN_TMPDIR)
 
 clean:
-	@rm -rf $(MANFILES) $(HTMLFILES) iputils.html tmp.db2html tmp.db2man
+	@rm -rf $(MANFILES) $(HTMLFILES) iputils.html tmp.db2html* tmp.db2man*
 
 snapshot:
 	@date "+%y%m%d" > snapshot.db
-- 
2.8.2