[librsvg] Automatically generate ChangeLog from git history

[Christian Persch <chpe src gnome org>]

commit 455c8991757e3f8fb1be6932514212ed61089f6d
Author: Christian Persch <chpe gnome org>
Date:   Tue Sep 6 08:52:37 2011 +0200

    Automatically generate ChangeLog from git history

 ChangeLog => ChangeLog.old |    0
 Makefile.am                |   11 +++++++++++
 2 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog.old
similarity index 100%
rename from ChangeLog
rename to ChangeLog.old
diff --git a/Makefile.am b/Makefile.am
index 687ef1e..505a08e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -243,3 +243,14 @@ s-enum-types-c: $(headers) Makefile
 	&& echo timestamp > $(@F)
 
 DISTCHECK_CONFIGURE_FLAGS = --enable-gtk-doc
+
+# ChangeLog generation
+
+ChangeLog:
+	$(AM_V_GEN) if test -d $(top_srcdir)/.git; then \
+		GIT_DIR="$(top_srcdir)/.git" git log --stat > $@; \
+	fi
+
+dist: ChangeLog
+
+.PHONY: ChangeLog