build: Generate a ChangeLog file upon "make dist".

* Makefile.am (sync-synopses): New rule, formerly `dist-hook.
  (gen-ChangeLog): New rule.
  (dist-hook): Depend on these two targets.

2 files changed, 17 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index 83deffcadad..d6ea6943261 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1 +1,4 @@
-Please see the Git commit log at <https://gitorious.org/guix>.
+Normally a ChangeLog is generated at "make dist" time and available in
+source tarballs.
+
+If not, see the Git commit log at <http://git.sv.gnu.org/cgit/guix.git/>.
diff --git a/Makefile.am b/Makefile.am
index 69b4af013a3..538fad32a4a 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -412,6 +412,18 @@ AM_DISTCHECK_CONFIGURE_FLAGS =			\
   --with-nix-prefix="$(NIX_PREFIX)"             \
   --enable-daemon
 
-dist-hook:
+dist-hook: sync-synopses gen-ChangeLog
+
+sync-synopses:
         -$(top_builddir)/pre-inst-env $(GUILE)          \
            $(top_srcdir)/build-aux/sync-synopses.scm
+
+gen-ChangeLog:
+        if test -d .git; then                           \
+          $(top_srcdir)/build-aux/gitlog-to-changelog   \
+            > $(distdir)/cl-t;                          \
+          rm -f $(distdir)/ChangeLog;                   \
+          mv $(distdir)/cl-t $(distdir)/ChangeLog;      \
+        fi
+
+.PHONY: sync-synopses gen-ChangeLog