Backup git working status

git-backup.sh

#!/bin/bash
### Backup git working status
#  Backup modified and untracked files without ignored ones in any git working directory. The destination is required and will be created automatically if not exists.
#
#  Usage:
#       ./git-backup [destination path]
#  Ex:
#       ./git-backup ~/backup20130101
#
#  Note: Mac users have to install GNU Coreutils to support `--parents` of cp command
###

if [[ ! -e ".git" ]]; then
    # check of current path is corresponding to a GIT repository
    echo "Not a git repository (or any of the parent directories)"
    exit 1
elif [[ -z "$1" ]]; then
    # target path should not be empty
    echo "Usage: git-backup.sh [destination path]"
    exit 2
else
    # create destination if not exists
    (test -d "$1" || mkdir -p "$1") &&
    # list modified and untracked files without ignored ones
    (git ls-files --modified --others --exclude-standard) |
    # copy files to destination with original folder structure
    (xargs -I {} sh -c "file=\"{}\";test -f \$file && $CP_CMD_PATH -v \$file --parents $1")
fi