Add dist hook to generate ChangeLog.

Taken from cairo.  It still need some tweaking.

3 files changed, 86 insertions, 1 deletions

diff --git a/ChangeLog.mk b/ChangeLog.mk
new file mode 100644
index 00000000..99f5ed60
--- /dev/null
+++ b/ChangeLog.mk
@@ -0,0 +1,81 @@
+# Creating ChangeLog files from git log:
+
+# We always create a ChangeLog that contains the most recent changes, and
+# multiple others for changes between major releases (other than the last such
+# segment that we put in 'ChangeLog'.  The old ones are named
+# ChangeLog.pre-X.Y where X.Y is the version number of the major release.
+
+CURR_CHANGELOG_VERSION=$(CAIRO_VERSION_MAJOR).$$(echo "($(CAIRO_VERSION_MINOR)+1)/2*2" | bc)
+# examines $version
+PREV_CHANGELOG_VERSION=$$(if test "x$$(echo "($$version-0.1)*2/2"|bc)" = "x$$(echo "$$version*2/2"|bc)"; \
+			  then echo "$$version-$$(echo "$$version" | sed 's/[0-9]/0/g;s/[0-9]$$/2/')"; \
+			  else echo "$$version-1.0"; \
+			  fi | bc | sed 's/[.]0*/./;s/^0[.]\?$$/initial/;s/[.]$$/.0/')
+
+CHANGELOGS = ChangeLog \
+	`version=$(CURR_CHANGELOG_VERSION); \
+	version=$(PREV_CHANGELOG_VERSION); \
+	while test "x$$version" != xinitial; do \
+		echo ChangeLog.pre-$$version; \
+		version=$(PREV_CHANGELOG_VERSION); \
+	done`
+
+MAINTAINERCLEANFILES += $(srcdir)/ChangeLog $(srcdir)/ChangeLog.pre-*
+DISTCLEANFILES += $(srcdir)/ChangeLog.cache-*
+
+changelogs:
+	@$(MAKE) $(AM_MAKEFLAGS) $(CHANGELOGS)
+
+dist-hook: changelogs
+	changelogs="$(CHANGELOGS)"; \
+	for changelog in $$changelogs; do \
+		cp $(srcdir)/$$changelog $(distdir)/ 2>/dev/null || \
+		cp $$changelog $(distdir)/; \
+	done
+
+$(srcdir)/ChangeLog:
+	@if test -d "$(srcdir)/.git"; then \
+		version=$(CURR_CHANGELOG_VERSION); \
+		prev=$(PREV_CHANGELOG_VERSION).0; \
+		nearest_tag=`git-describe | sed 's/-.*//'`; \
+		before=$(srcdir)/ChangeLog.cache-$$prev..$$nearest_tag; \
+		after=$(srcdir)/ChangeLog.cache-$$nearest_tag..; \
+		$(MAKE) $(AM_MAKEFLAGS) $$before $$after && \
+		echo Creating $@ && \
+		{ cat $$after; echo; cat $$before; } > $@; \
+	else \
+		test -f $@ || \
+		(echo A git checkout is required to generate $@ >&2 && \
+		 echo A git checkout is required to generate this file >> $@); \
+	fi
+
+DISTCLEANFILES += ChangeLog.cache-*
+
+ChangeLog.cache-*..: .git
+
+ChangeLog%: $(srcdir)/ChangeLog%
+
+$(srcdir)/ChangeLog.cache-% $(srcdir)/ChangeLog.pre-%:
+	@echo Creating $@
+	@if test -d "$(srcdir)/.git"; then \
+	  (cd "$(srcdir)" && \
+	  version=$$(echo "$@" | sed 's/.*ChangeLog\([.].*-\)\?//'); \
+	  if echo "$@" | grep -q '^ChangeLog[.]cache'; then \
+		spec=$$version; \
+	  else \
+		to=$$version; \
+		test "x$$version" = x && version=$(CURR_CHANGELOG_VERSION); \
+		from=$(PREV_CHANGELOG_VERSION); \
+		test "x$$to" = x || version=$$version.0; \
+		test "x$$from" = xinitial || from=$$from.0; \
+		spec=$$from..$$to; \
+	  fi; \
+	  ./missing --run git-log --stat "$$spec") > $@.tmp \
+	  && mv -f $@.tmp $@ \
+	  || ($(RM) $@.tmp; \
+	      echo Failed to generate $@, your $@ may be outdated >&2); \
+	else \
+	  echo A git checkout is required to generate $@ >&2; \
+	fi
+
+.PHONY: changelogs ChangeLog $(srcdir)/ChangeLog
diff --git a/Makefile.am b/Makefile.am
index fda19b0f..3142b18d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -46,3 +46,7 @@ pkgconfig_DATA =				\
 	$(glib_pc_file)				\
 	$(qt_pc_file)                           \
 	$(qt4_pc_file)
+
+MAINTAINERCLEANFILES =
+DISTCLEANFILES =
+include ChangeLog.mk
\ No newline at end of file
diff --git a/configure.ac b/configure.ac
index 81c75c2a..4bdce05c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 AC_PREREQ(2.59)
 AC_INIT(poppler, 0.6)
-AM_INIT_AUTOMAKE(AC_PACKAGE_NAME, AC_PACKAGE_VERSION)
+AM_INIT_AUTOMAKE([foreign])
 AM_CONFIG_HEADER(config.h)
 AM_CONFIG_HEADER(poppler/poppler-config.h)