scripts: git-ignore, git-root

needs to be improved

.local/bin/git-root

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+git_root() {
+  git rev-parse --show-toplevel
+}
+
+# get the relative path of current path according to root of repo
+git_root_relative() {
+    rel=$(git rev-parse --show-prefix)
+    if [ -z "$rel" ]; then
+        # git rev-parse --show-prefix will output empty string when we are in the root dir
+        echo "."
+    else
+        echo "$rel"
+    fi
+}
+
+if test $# -eq 0; then
+    git_root
+else
+    case "$1" in
+    -r|--relative)
+        git_root_relative
+        ;;
+    *)
+        git_root
+        ;;
+    esac
+fi