[evolution-ews] Generate a ChangeLog file in tarballs.

[Matthew Barnes <mbarnes src gnome org>]

commit 3c6104c7ecc59333b106caa84fd66508d3b4f6d6
Author: Matthew Barnes <mbarnes redhat com>
Date:   Sat Nov 17 09:13:26 2012 -0500

    Generate a ChangeLog file in tarballs.

 Makefile.am |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 3e831b0..98caa3a 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -44,4 +44,20 @@ MAINTAINERCLEANFILES = \
 	$(srcdir)/m4/lt~obsolete.m4 \
 	$(NULL)
 
+# Generate a ChangeLog file from 'git log'
+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 \
+		  EVOLUTION_EWS_3_2_1..) > 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
+
 -include $(top_srcdir)/git.mk