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prezto/git.zsh

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# get the name of the branch we are on
function git_prompt_info() {
ref=$(git symbolic-ref HEAD 2> /dev/null) || return
branch=${ref#refs/heads/}
if [[ -d .git ]]; then
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CURRENT_BRANCH="(%{$fg[red]%}${branch}%{$reset_color%})$(parse_git_dirty)"
else
CURRENT_BRANCH=''
fi
echo $CURRENT_BRANCH
}
parse_git_dirty () {
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[[ $(git status | tail -n1) != "nothing to commit (working directory clean)" ]] && echo " %{$fg[yellow]%}✗%{$reset_color%}"
}