debian: Check for accurate Debian changelog version at build time too.

When we increment the Open vSwitch version number, we tend to forget to
update it in debian/changelog at the same time.  Right now this gets
fixed up automatically at "make dist" time, but it's even better if we can
always have it be correct in the repository.  This commit should help with
that, by making both "make" and "make dist" refuse to proceed if the
version number is out of sync.

Makefile.am

@@ -69,7 +69,6 @@ SUFFIXES =
 noinst_HEADERS += $(EXTRA_DIST)
 
 EXTRA_DIST += \
-	build-aux/update-debian-changelog \
 	soexpand.pl
 
 ro_c = echo '/* -*- mode: c; buffer-read-only: t -*- */'

boot.sh

@@ -1,6 +1,2 @@
 #! /bin/sh
 autoreconf --install --force
-
-# Ensure that debian/changelog is up-to-date.
-VERSION=`autom4te --language=autoconf -t 'AC_INIT:$2' configure.ac`
-build-aux/update-debian-changelog debian/changelog "$VERSION"

configure.ac

@@ -27,6 +27,7 @@ AM_PROG_CC_C_O
 AC_PROG_CPP
 AC_PROG_RANLIB
 AC_PROG_MKDIR_P
+AC_PROG_FGREP
 
 AC_ARG_VAR([PERL], [path to Perl interpreter])
 AC_PATH_PROG([PERL], perl, no)

debian/automake.mk

@@ -62,7 +62,13 @@ EXTRA_DIST += \
 	debian/rules \
 	debian/rules.modules
 
-dist-hook-debian-changelog:
-	$(srcdir)/build-aux/update-debian-changelog '$(distdir)/debian/changelog' '$(VERSION)'
-DIST_HOOKS += dist-hook-debian-changelog
-EXTRA_DIST += build-aux/update-debian-changelog
+check-debian-changelog-version:
+	@if $(FGREP) '($(VERSION))' $(srcdir)/debian/changelog >/dev/null; \
+	then								   \
+	  :;								   \
+	else								   \
+	  echo "Update debian/changelog to mention version $(VERSION)";	   \
+	  exit 1;							   \
+	fi
+ALL_LOCAL += check-debian-changelog-version
+DIST_HOOKS += check-debian-changelog-version

debian/changelog

@@ -1,4 +1,4 @@
-openvswitch (1.0.0) unstable; urgency=low
+openvswitch (1.0.1) unstable; urgency=low
 
   * New upstream version.