[build] Rename ChangeLog and autogenerate it

diff --git a/ChangeLog b/ChangeLog.pre-git
similarity index 100%
rename from ChangeLog
rename to ChangeLog.pre-git

diff --git a/Makefile.am b/Makefile.am
index a46473aa7a00b3c42bd018b97caa33b21906da9b..9029b001532ece86a43c0459920f73c0442f9eac 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -54,3 +54,24 @@ DISTCHECK_CONFIGURE_FLAGS = --disable-schemas-install --disable-scrollkeeper --e
 
 # Ignore scrollkeeper issues for now.  @#*$& scrollkeeper
 distuninstallcheck_listfiles = find . -type f -print | grep -v scrollkeeper | grep -v /share/gnome/help/ | grep -v \.omf
+
+distclean-local:
+       if test $(srdcir) = .; then :; else \
+               rm -f ChangeLog; \
+       fi
+
+ChangeLog:
+       @echo Creating $@
+       @if test -d "$(srcdir)/.git"; then \
+         (GIT_DIR=$(top_srcdir)/.git ./missing --run git log -M -C --name-status --date=short --no-color) | 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+             echo Failed to generate ChangeLog, your ChangeLog may be outdated 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
+
+.PHONY: ChangeLog