[pygobject] Retire hand-written ChangeLog; autocreate from Git history

[Paul Pogonyshev <paulp src gnome org>]

commit 8cd25c871609580425c6c4c9e5bc6ec8d40862a1
Author: Paul Pogonyshev <pogonyshev gmx net>
Date:   Sat May 9 16:46:04 2009 +0300

    Retire hand-written ChangeLog; autocreate from Git history
    
    Basically copied over from GLib source tree.
---
 ChangeLog => ChangeLog.pre-2.18 |    2 ++
 Makefile.am                     |   32 ++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 0 deletions(-)

diff --git a/ChangeLog b/ChangeLog.pre-2.18
similarity index 99%
rename from ChangeLog
rename to ChangeLog.pre-2.18
index 4da5c6f..2fb8ef4 100644
--- a/ChangeLog
+++ b/ChangeLog.pre-2.18
@@ -1,3 +1,5 @@
+=== ChangeLog discontinued ===
+
 2009-05-04  Siavash Safi  <siavash siavashs org>
 
 	Bug 579275 â?? Patch which removes dll api in headers and adds
diff --git a/Makefile.am b/Makefile.am
index 5ed6fa7..93442af 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -15,10 +15,14 @@ EXTRA_DIST = 				\
 	pygobject_postinstall.py	\
 	pygtk.py			\
 	dsextras.py			\
+	ChangeLog.pre-2.18		\
 	m4/as-ac-expand.m4		\
 	m4/jhflags.m4			\
 	m4/python.m4
 
+BUILT_EXTRA_DIST = 		\
+	ChangeLog
+
 INCLUDES = -I$(top_srcdir)/gobject $(PYTHON_INCLUDES) $(GLIB_CFLAGS)
 
 # pkg-config files
@@ -86,3 +90,31 @@ release-tag:
               $$ROOT \
               svn+ssh://johan svn gnome org/svn/pygobject/tags/PYGOBJECT_$$SVNVERSION
 
+
+.PHONY: ChangeLog
+
+ChangeLog:
+	@echo Creating $@
+	@if test -d "$(srcdir)/.git"; then \
+	  (GIT_DIR=$(top_srcdir)/.git ./missing --run git log PYGOBJECT_2_17_0^^.. --stat) | fmt --split-only > $  tmp \
+	  && mv -f $  tmp $@ \
+	  || ($(RM) $  tmp; \
+	      echo Failed to generate ChangeLog, your ChangeLog may be outdated >&2; \
+	      (test -f $@ || echo git-log is required to generate this file >> $@)); \
+	else \
+	  test -f $@ || \
+	  (echo A git checkout and git-log is required to generate ChangeLog >&2 && \
+	  echo A git checkout and git-log is required to generate this file >> $@); \
+	fi
+
+
+distclean-local:
+	if test $(srcdir) = .; then :; else \
+	    rm -f $(BUILT_EXTRA_DIST); \
+	fi
+
+dist-hook: $(BUILT_EXTRA_DIST)
+	files='$(BUILT_EXTRA_DIST)'; \
+	for f in $$files; do \
+	  if test -f $$f; then d=.; else d=$(srcdir); fi; \
+	  rm -f $(distdir)/$$f && cp $$d/$$f $(distdir) || exit 1; done