Generalize doc generation

This borrows from the git Documentation/Makefile.  The goal is to make
it easier to add new man pages and other documentation as well as to
prevent make from re-generating the documentation needlessly.

Signed-off-by: Todd Zullinger <tmz@pobox.com>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>

1 files changed, 16 insertions, 7 deletions

diff --git a/Makefile b/Makefile
index 6a47ed2..db97ae3 100644
--- a/Makefile
+++ b/Makefile
@@ -5,12 +5,17 @@ CGIT_DATA_PATH = $(CGIT_SCRIPT_PATH)
 CGIT_CONFIG = /etc/cgitrc
 CACHE_ROOT = /var/cache/cgit
 SHA1_HEADER = <openssl/sha.h>
 GIT_VER = 1.7.3
 GIT_URL = http://www.kernel.org/pub/software/scm/git/git-$(GIT_VER).tar.bz2
 INSTALL = install
+MAN5_TXT = $(wildcard *.5.txt)
+MAN_TXT  = $(MAN5_TXT)
+DOC_MAN5 = $(patsubst %.txt,%,$(MAN5_TXT))
+DOC_HTML = $(patsubst %.txt,%.html,$(MAN_TXT))
+DOC_PDF  = $(patsubst %.txt,%.pdf,$(MAN_TXT))
 
 # Define NO_STRCASESTR if you don't have strcasestr.
 #
 # Define NO_OPENSSL to disable linking with OpenSSL and use bundled SHA1
 # implementation (slower).
 #
@@ -107,13 +112,13 @@ OBJECTS += ui-tree.o
 ifdef NEEDS_LIBICONV
         EXTLIBS += -liconv
 endif
 
 
 .PHONY: all libgit test install uninstall clean force-version get-git \
-        doc man-doc html-doc clean-doc
+        doc clean-doc
 
 all: cgit
 
 VERSION: force-version
         @./gen-version.sh "$(CGIT_VERSION)"
 -include VERSION
@@ -167,21 +172,25 @@ install: all
 
 uninstall:
         rm -f $(CGIT_SCRIPT_PATH)/$(CGIT_SCRIPT_NAME)
         rm -f $(CGIT_DATA_PATH)/cgit.css
         rm -f $(CGIT_DATA_PATH)/cgit.png
 
-doc: man-doc html-doc pdf-doc
+doc: doc-man doc-html doc-pdf
+doc-man: doc-man5
+doc-man5: $(DOC_MAN5)
+doc-html: $(DOC_HTML)
+doc-pdf: $(DOC_PDF)
 
-man-doc: cgitrc.5.txt
-        a2x -f manpage cgitrc.5.txt
+%.5 : %.5.txt
+        a2x -f manpage $<
 
-html-doc: cgitrc.5.txt
-        a2x -f xhtml --stylesheet=cgit-doc.css cgitrc.5.txt
+$(DOC_HTML): %.html : %.txt
+        a2x -f xhtml --stylesheet=cgit-doc.css $<
 
-pdf-doc: cgitrc.5.txt
+$(DOC_PDF): %.pdf : %.txt
         a2x -f pdf cgitrc.5.txt
 
 clean: clean-doc
         rm -f cgit VERSION *.o *.d
 
 clean-doc: