oh-my-zsh/lib/git.zsh

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# get the name of the branch we are on
function git_prompt_info() {
ref=$(git symbolic-ref HEAD 2> /dev/null) || return
echo "$ZSH_THEME_GIT_PROMPT_PREFIX${ref#refs/heads/}$(parse_git_dirty)$ZSH_THEME_GIT_PROMPT_SUFFIX"
}
parse_git_dirty () {
if [[ -n $(git status -s 2> /dev/null) ]]; then
echo "$ZSH_THEME_GIT_PROMPT_DIRTY"
else
echo "$ZSH_THEME_GIT_PROMPT_CLEAN"
fi
}
#
# Will return the current branch name
# Usage example: git pull origin $(current_branch)
#
function current_branch() {
ref=$(git symbolic-ref HEAD 2> /dev/null) || return
echo ${ref#refs/heads/}
}