git hooks: enable them automatically during 'make'

So one can't forget enabling them.

Change-Id: Icb595e9d0711227eaa6f11c1a9ff87f2c361e0bb

Makefile.am

@@ -322,6 +322,7 @@ EXTRA_DIST = discovery.xml \
              etc/apache2/loolwsd.conf \
              etc/nginx/loolwsd.conf \
              scripts/unocommands.py \
+             scripts/refresh-git-hooks \
              $(man_MANS)
 
 if ENABLE_LIBFUZZER
@@ -501,6 +502,7 @@ endif
 # installing the RPM or Debian package.
 all-local: $(ALL_LOCAL_DEPS) @JAILS_PATH@ $(SYSTEM_STAMP)
 	$(SET_CAPS_COMMAND)
+	@$(abs_top_srcdir)/scripts/refresh-git-hooks
 
 # just run the build without any tests
 build-nocheck: all-am

autogen.sh

@@ -30,6 +30,8 @@ automake --add-missing || failed "automake"
 
 autoreconf || failed "autoreconf"
 
+scripts/refresh-git-hooks || failed "refresh-git-hooks"
+
 cat << EOF
 
 Result: All went OK, please run $srcdir/configure (with the appropriate parameters) now.

scripts/refresh-git-hooks

@@ -0,0 +1,21 @@
+#!/bin/bash -e
+
+srcdir="$PWD"
+if [ -n "${abs_srcdir}" ]; then
+    srcdir="${abs_srcdir}"
+fi
+
+if [ ! -d "${srcdir}/.git" ]; then
+    exit 0
+fi
+
+for hook_name in ${srcdir}/.git-hooks/*
+do
+    hook="${srcdir}/.git/hooks/${hook_name##*/}"
+    if [ ! -e "${hook}" ]; then
+        rm -f "${hook}"
+        ln -sf "${hook_name}" "${hook}"
+    fi
+done
+
+# vim:set shiftwidth=4 softtabstop=4 expandtab: