debian: include the number of git patches in the version

* configure.ac, debian/changelog.in: Adjust.
* debian/source/format: Distribute this.
* Makefile.am (deb): New target.

Makefile.am

@@ -32,10 +32,14 @@ SUBDIRS = buddy lib src wrap ltdl iface doc $(NEVER_BENCH)
 
 UTF8 = utf8/doc/ReleaseNotes utf8/doc/utf8cpp.html utf8/utf8.h	\
   utf8/utf8/checked.h utf8/utf8/core.h utf8/utf8/unchecked.h
-DEBIAN = debian/changelog.in debian/compat debian/control \
-  debian/copyright debian/docs debian/rules debian/spot-doc.docs \
-  debian/spot-doc.install debian/spot-doc.doc-base \
-  debian/spot.install debian/libspot-dev.install
+DEBIAN = debian/changelog debian/changelog.in debian/compat		\
+  debian/control debian/copyright debian/docs debian/rules		\
+  debian/source/format debian/spot-doc.docs debian/spot-doc.install	\
+  debian/spot-doc.doc-base debian/spot.install				\
+  debian/libspot-dev.install
+
+debian/changelog: configure.ac
+	$(top_builddir)/config.status --file debian/changelog
 
 ACLOCAL_AMFLAGS = -I m4
 EXTRA_DIST = HACKING ChangeLog.1 tools/gitlog-to-changelog	\
@@ -45,7 +49,7 @@ EXTRA_DIST = HACKING ChangeLog.1 tools/gitlog-to-changelog	\
 dist-hook: gen-ChangeLog
 
 gen_start = 2012-03-10
-.PHONY: gen-ChangeLog
+.PHONY: gen-ChangeLog deb
 gen-ChangeLog:
 	if test -d .git; then						\
 ## Generate all commits in the form "SHA1 subject"
@@ -62,3 +66,13 @@ gen-ChangeLog:
           rm -f $(distdir)/ChangeLog;					\
           mv $(distdir)/cl-t $(distdir)/ChangeLog;			\
 	fi
+
+# Build Debian packages.
+# Run it with:  make DEBUILDFLAGS=-j8 deb -j8
+deb: dist
+	rm -rf spot-$(VERSION) spot-$(VERSION)$(GITPATCH)
+	tar zxvf spot-$(VERSION).tar.gz
+	mv spot-$(VERSION) spot-$(VERSION)$(GITPATCH)
+	tar Jcvf spot_$(VERSION)$(GITPATCH).orig.tar.xz \
+	         spot-$(VERSION)$(GITPATCH)
+	cd spot-$(VERSION)$(GITPATCH) && debuild $(DEBUILDFLAGS) -us -uc

configure.ac

@@ -160,6 +160,11 @@ AC_CHECK_PROGS([SWIG], [swig3.0 swig], [swig])
 
 AC_SUBST([CROSS_COMPILING], [$cross_compiling])
 
+AC_SUBST([GITPATCH], [$(if (git rev-parse) >/dev/null 2>&1; then
+  echo -n .
+  git rev-list $(git rev-list --tags --no-walk --max-count=1)..HEAD --count
+fi)])
+
 AC_CONFIG_FILES([
   Makefile
   bench/Makefile
@@ -173,7 +178,6 @@ AC_CONFIG_FILES([
   bench/spin13/Makefile
   bench/wdba/Makefile
   bench/stutter/Makefile
-  debian/changelog
   doc/Doxyfile
   doc/Makefile
   doc/tl/Makefile

debian/changelog.in

-spot (@VERSION@-1) unstable; urgency=low
+spot (@VERSION@@GITPATCH@-1) unstable; urgency=low
 
   * Initial release
 

debian/source/format

+3.0 (quilt)