Generate and use version.py for Sphinx

Sphinx's idea of the version number appears in the man pages and
compiled PDF documents, and shows up as metadata in the generated
HTML sources.

Extract the version information from the master source (patchlevel.h)
into a form usable by Sphinx.

ticket: 7433
tags: pullup

3 files changed, 37 insertions, 4 deletions

diff --git a/src/doc/Makefile.in b/src/doc/Makefile.in
index 4fcbb67a09..2413068645 100644
--- a/src/doc/Makefile.in
+++ b/src/doc/Makefile.in
@@ -57,7 +57,7 @@ NOTICE: notice.txt
 # Use doxygen to generate API documentation, translate it into RST
 # format, and then create a composite of $(docsrc)'s RST and the
 # generated files in rst_composite.  Used by the html and substhtml targets.
-composite: Doxyfile
+composite: Doxyfile $(docsrc)/version.py
 	rm -rf doxy rst_apiref rst_composite
 	$(DOXYGEN)
 	cwd=`pwd`; cd $(docsrc)/tools && \
@@ -70,15 +70,17 @@ composite: Doxyfile
 	cp rst_apiref/*.rst rst_composite/appldev/refs/api
 	cp rst_apiref/types/*.rst rst_composite/appldev/refs/types
 	cp rst_apiref/macros/*.rst rst_composite/appldev/refs/macros
+	cp $(docsrc)/version.py rst_composite
 
 # Must use a separate source dir for sphinx text builds, since the text
 # engine cannot handle the row spanning cells in fancy tables that we use
-rst_notice: $(docsrc)/notice.rst $(docsrc)/txt_conf.py
+rst_notice: $(docsrc)/notice.rst $(docsrc)/txt_conf.py $(docsrc)/version.py
 	mkdir -p rst_notice
 	# reST needs backslashes before parens in this macro definition.
 	sed -e 's/include:: <isonum.txt>/|copy| replace:: \\(C\\)/' \
 		< $(docsrc)/notice.rst > rst_notice/notice.rst
 	cp $(docsrc)/txt_conf.py rst_notice/conf.py
+	cp $(docsrc)/version.py rst_notice
 
 Doxyfile: $(srcdir)/Doxyfile.in
 	sed -e 's|@SRC@|$(top_srcdir)|g' \
@@ -95,6 +97,13 @@ paths.py:
 	echo 'keytab = "``$(DEFKTNAME)``"' >> $@
 	echo 'ckeytab = "``$(DEFCKTNAME)``"' >> $@
 
+# Dummy rule that man/Makefile can invoke
+version.py: $(docsrc)/version.py
+
+$(docsrc)/version.py: $(top_srcdir)/patchlevel.h $(srcdir)/version.py.in
+	$(RM) $@
+	$(CC) -E -I$(top_srcdir) - < $(srcdir)/version.py.in > $@
+
 clean::
 	rm -rf doxy rst_apiref rst_composite rst_notice html_subst \
-		Doxyfile paths.py
+		Doxyfile paths.py $(docsrc)/version.py
diff --git a/src/doc/version.py.in b/src/doc/version.py.in
new file mode 100644
index 0000000000..0a344a7797
--- /dev/null
+++ b/src/doc/version.py.in
@@ -0,0 +1,21 @@
+#include "patchlevel.h"
+
+r_major = KRB5_MAJOR_RELEASE
+r_minor = KRB5_MINOR_RELEASE
+r_patch = KRB5_PATCHLEVEL
+
+#ifdef KRB5_RELTAIL
+r_tail = KRB5_RELTAIL
+#else
+r_tail = None
+#endif
+#ifdef KRB5_RELDATE
+r_date = KRB5_RELDATE
+#else
+r_date = None
+#endif
+#ifdef KRB5_RELTAG
+r_tag = KRB5_RELTAG
+#else
+r_date = None
+#endif
diff --git a/src/man/Makefile.in b/src/man/Makefile.in
index 895b5c1ab6..19617eee20 100644
--- a/src/man/Makefile.in
+++ b/src/man/Makefile.in
@@ -24,7 +24,7 @@ docsrc=$(top_srcdir)/../doc
 #     make -f Makefile.in clean
 # The sed command deletes some trailing whitespace that the docutils
 # manpage writer outputs near the end of its output files.
-man:
+man: $(docsrc)/version.py
 	rm -rf rst_man
 	$(SPHINX_BUILD) -q -t mansubs -b man $(docsrc) rst_man
 	for f in rst_man/*.[0-9]; do \
@@ -32,6 +32,9 @@ man:
 		sed -e '/^\.\\" $$/d' $$f > $(srcdir)/$$name.man; \
 	done
 
+$(docsrc)/version.py: $(top_srcdir)/patchlevel.h
+	(cd $(BUILDTOP)/doc && make version.py)
+
 .SUFFIXES: .man .sub
 
 .man.sub: