[nanny] Add git ChangeLog dist-hook

[Roberto Majadas <telemaco src gnome org>]

commit a8d0e9b2c2611bce69b0cb05798aeaec6cab4fb9
Author: Roberto Majadas <roberto majadas openshine com>
Date:   Mon Dec 21 01:52:16 2009 +0100

    Add git ChangeLog dist-hook

 Makefile.am |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 7982998..030e501 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -24,3 +24,17 @@ init_PYTHON = __init__.py
 
 #Ignore scrollkeeper files
 DISTCHECK_CONFIGURE_FLAGS = --disable-scrollkeeper
+
+dist-hook:
+	@if test -d "$(srcdir)/.git"; \
+	then \
+		echo Creating ChangeLog && \
+		( cd "$(top_srcdir)" && \
+		echo '# Generated by Makefile. Do not edit.'; echo; \
+		$(top_srcdir)/missing --run git log --stat ) > ChangeLog.tmp \
+		&& mv -f ChangeLog.tmp $(top_distdir)/ChangeLog \
+		|| ( rm -f ChangeLog.tmp ; \
+		echo Failed to generate ChangeLog >&2 ); \
+	else \
+		echo A git clone is required to generate a ChangeLog >&2; \
+	fi
\ No newline at end of file