Git Bash Script Check Working Tree

Question

Is there a way in Git Bash to check if the working tree is clean, that is no uncommitted changes or untracked files?

I'm working on a bash script for my group to automate the process of daily rebasing working branches. Unclean working trees is a common problem. I can manually correct the problem by executing git checkout .. This would have the desired result most of the time, but not always, so I need to be able to have my script programatically check that the working directory/tree is clean.

git status (specifically the --porcelain option for machine parsing) can give you this information. — Etan Reisner
– Etan Reisner, Commented May 5, 2015 at 22:03

Etan Reisner · Accepted Answer · 2015-05-05 22:09:12Z

The git-sh-setup script included with git contains a number of useful functions for working with git repositories. Among them is require_clean_work_tree:

require_clean_work_tree () {
    git rev-parse --verify HEAD >/dev/null || exit 1
    git update-index -q --ignore-submodules --refresh
    err=0
    if ! git diff-files --quiet --ignore-submodules
    then
        echo >&2 "Cannot $1: You have unstaged changes."
        err=1
    fi
    if ! git diff-index --cached --quiet --ignore-submodules HEAD --
    then
        if [ $err = 0 ]
        then
            echo >&2 "Cannot $1: Your index contains uncommitted changes."
        else
            echo >&2 "Additionally, your index contains uncommitted changes."
        fi
        err=1
    fi
    if [ $err = 1 ]
    then
        test -n "$2" && echo >&2 "$2"
        exit 1
    fi
}

This is in addition to being able to check the output from git status --porcelain and/or git status -z if you need to be more specific about what the state currently is.

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