Merge branch 'maint' into yacc-work

* maint:
  maint: autogenerate ChangeLog

diff --git a/.gitignore b/.gitignore
index 4782321..33e3827 100644 (file)
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 Makefile.in
 Makefile
+/ChangeLog
 /aclocal.m4
 /configure
 /autom4te.cache

diff --git a/ChangeLog b/ChangeLog.11
similarity index 100%
rename from ChangeLog
rename to ChangeLog.11

diff --git a/Makefile.am b/Makefile.am
index acb7228..ed01bbb 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -42,6 +42,7 @@ EXTRA_DIST = \
   ChangeLog.03 \
   ChangeLog.04 \
   ChangeLog.09 \
+  ChangeLog.11 \
   bootstrap \
   $(AUTOMAKESOURCES)
 
@@ -108,6 +109,43 @@ INSTALL: lib/INSTALL
 ## to anybody else
 ##
 
+gitlog_to_changelog_command = $(PERL) $(srcdir)/lib/gitlog-to-changelog
+gitlog_to_changelog_options = --since='2011-12-28 00:00:00'
+
+# Automatic generation of the ChangeLog from git history.
+#
+# When executed from a git checkout, generate the ChangeLog from the git
+# history.  When executed from an extracted distribution tarball, just
+# copy the distributed ChangeLog in the build directory (and if this
+# fails, or if no distributed ChangeLog file is present, complain and
+# give an error).
+#
+# We need the apparently useless dependency from another .PHONY target
+# `am--changelog-regen-hook' to work around a bug of Solaris make, which
+# doesn't execute the recipe of a target named as an existing file, even
+# if such target is declared `.PHONY' (yikes!)
+#
+.PHONY: am--changelog-regen-hook
+am--changelog-regen-hook:
+ChangeLog: am--changelog-regen-hook
+       $(AM_V_GEN)set -e; set -u; \
+## The ChangeLog should be regenerated unconditionally when working from
+## checked-out sources; otherwise, if we're working from a distribution
+## tarball, we expect the ChangeLog to be distributed, so check that it
+## is indeed present in the source directory.
+       if test -d $(srcdir)/.git; then \
+         rm -f $@-t \
+           && $(gitlog_to_changelog_command) \
+              $(gitlog_to_changelog_options) >$@-t \
+           && chmod a-w $@-t \
+           && mv -f $@-t $@ \
+           || exit 1; \
+       elif test ! -f $(srcdir)/$@; then \
+         echo "Source tree is not a git checkout, and no pre-existent" \
+              "$@ file has been found there" >&2; \
+         exit 1; \
+       fi
+
 # Ensure tests are world-executable
 dist-hook:
        cd $(distdir)/tests && chmod a+rx *.test