Added tracked hooks to test-assets repo

Change-Id: Ic9fda9c5d4b256be01bdb85792de21ef58cbd684

git/hooks-wrapper

@@ -0,0 +1,9 @@
+#!/bin/bash
+if [ -x $0.local ]; then
+    $0.local "$@" || exit $?
+fi
+
+REPO_DIR=$(dirname $GIT_DIR)
+if [ -x $REPO_DIR/git/tracked_hooks/$(basename $0) ]; then
+    $REPO_DIR/git/tracked_hooks/$(basename $0) "$@" || exit $?
+fi

git/install-hook-symlinks

@@ -0,0 +1,28 @@
+#!/bin/bash
+HOOK_NAMES="
+applypatch-msg
+pre-applypatch
+post-applypatch
+pre-commit
+prepare-commit-msg
+commit-msg
+post-commit
+pre-rebase
+post-checkout
+post-merge
+pre-receive
+update
+post-receive
+post-update
+pre-auto-gc
+"
+
+HOOK_SRC=$(dirname $0)
+HOOK_DIR=$(git rev-parse --git-dir)/hooks || exit $?
+
+for hook in $HOOK_NAMES; do
+    if [ ! -h $HOOK_DIR/$hook -a -x $HOOK_DIR/$hook ]; then
+        mv $HOOK_DIR/$hook $HOOK_DIR/$hook.local
+    fi
+    ln -s -f ../../git/hooks-wrapper $HOOK_DIR/$hook
+done

git/tracked_hooks/pre-commit

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+if git rev-parse --verify HEAD >/dev/null 2>&1
+then
+  against=HEAD
+else
+  # Initial commit: diff against an empty tree object
+  against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
+fi
+
+exec git diff-index --check --cached $against --