Add tools/generate-change-log

Add the tools/generate-change-log script for auto-generating the
ChangeLog file from the Git history when running "make dist".

1 files changed, 8 insertions, 1 deletions

diff --git a/Makefile.am b/Makefile.am
index dc166546..98542b94 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -3,7 +3,7 @@
 SUBDIRS = gl tap lib plugins plugins-scripts plugins-root po @PERLMODS_DIR@
 
 EXTRA_DIST = config.rpath \
-        ABOUT-NLS ACKNOWLEDGEMENTS AUTHORS CODING FAQ LEGAL NEWS \
+        ABOUT-NLS ACKNOWLEDGEMENTS AUTHORS CODING ChangeLog FAQ LEGAL NEWS \
         NP-VERSION-GEN REQUIREMENTS SUPPORT THANKS \
         NPTest.pm pkg nagios-plugins.spec \
         config_test/Makefile config_test/run_tests config_test/child_test.c \
@@ -15,6 +15,13 @@ ACLOCAL_AMFLAGS = -I gl/m4 -I m4
 localedir = $(datadir)/locale
 DEFS = -DLOCALEDIR=\"$(localedir)\"
 
+#
+# The ChangeLog file is auto-generated from the Git history.  We let it depend
+# on NP-VERSION-GEN, as we bump our version number in that file.
+#
+ChangeLog: NP-VERSION-GEN
+        $(top_srcdir)/tools/generate-change-log > $@
+
 dist-hook:
         $(MAKE) THANKS
         echo ${VERSION} >$(distdir)/release