[glade] Moved old ChangeLog to a zipped file, now generate ChangeLog at make dist time.

[Tristan Van Berkom <tvb src gnome org>]

commit 1028e9dd21e1346360c0ac48d3ab2f0bbd4ae2bf
Author: Tristan Van Berkom <tristan van berkom gmail com>
Date:   Mon Apr 15 17:27:30 2013 +0900

    Moved old ChangeLog to a zipped file, now generate ChangeLog at make dist time.

 ChangeLog        | 14082 -----------------------------------------------------
 ChangeLog.old.gz |   Bin 0 -> 149641 bytes
 Makefile.am      |    14 +
 3 files changed, 14 insertions(+), 14082 deletions(-)
---
diff --git a/ChangeLog.old.gz b/ChangeLog.old.gz
new file mode 100644
index 0000000..db5c659
Binary files /dev/null and b/ChangeLog.old.gz differ
diff --git a/Makefile.am b/Makefile.am
index f3bd3bf..5ec4456 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -15,3 +15,17 @@ DISTCLEANFILES = intltool-extract \
                  intltool-update
 
 DISTCHECK_CONFIGURE_FLAGS = --enable-gtk-doc --enable-introspection
+
+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 $(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