Git Info in Your Zsh Prompt

I already talked at length about my Mercurial Zsh prompt. Well I should also show my Git prompt using the same, awesome VCS_Info system that is built into Zsh.

../_images/git-prompt.png

The code can be found on GitHub.

Configuration

The required configuration for Git is a little lighter than for Mercurial:

zstyle ':vcs_info:*' enable git
zstyle ':vcs_info:git*:*' get-revision true
zstyle ':vcs_info:git*:*' check-for-changes true

# hash changes branch misc
zstyle ':vcs_info:git*' formats "(%s) %12.12i %c%u %b%m"
zstyle ':vcs_info:git*' actionformats "(%s|%a) %12.12i %c%u %b%m"

Hooks

Like with Mercurial, I’m using hooks to customize the prompt just so. Activate both hooks with:

zstyle ':vcs_info:git*+set-message:*' hooks git-st git-stash

Remote branch & commits ahead-of and behind

I find I really enjoy an at-a-glance reminder if the branch I’m working on is tracking a remote or not. If it is tracking a remote, it’s also a big time saver to see the difference between local and remote commits:

# Show remote ref name and number of commits ahead-of or behind
function +vi-git-st() {
    local ahead behind remote
    local -a gitstatus

    # Are we on a remote-tracking branch?
    remote=${$(git rev-parse --verify ${hook_com[branch]}@{upstream} \
        --symbolic-full-name 2>/dev/null)/refs\/remotes\/}

    if [[ -n ${remote} ]] ; then
        # for git prior to 1.7
        # ahead=$(git rev-list origin/${hook_com[branch]}..HEAD | wc -l)
        ahead=$(git rev-list ${hook_com[branch]}@{upstream}..HEAD 2>/dev/null | wc -l)
        (( $ahead )) && gitstatus+=( "${c3}+${ahead}${c2}" )

        # for git prior to 1.7
        # behind=$(git rev-list HEAD..origin/${hook_com[branch]} | wc -l)
        behind=$(git rev-list HEAD..${hook_com[branch]}@{upstream} 2>/dev/null | wc -l)
        (( $behind )) && gitstatus+=( "${c4}-${behind}${c2}" )

        hook_com[branch]="${hook_com[branch]} [${remote} ${(j:/:)gitstatus}]"
    fi
}

Show stashed changes

I tend to stash changes on a whim and forget about them. This handy reminder only shows up if there is a stash:

# Show count of stashed changes
function +vi-git-stash() {
    local -a stashes

    if [[ -s ${hook_com[base]}/.git/refs/stash ]] ; then
        stashes=$(git stash list 2>/dev/null | wc -l)
        hook_com[misc]+=" (${stashes} stashed)"
    fi
}
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