macOS Sierra bash settings - git prompt abomination

.bash_profile

PATH=$PATH:~/bin

if [ -f /usr/local/share/chruby/chruby.sh ] && [ -f /usr/local/share/chruby/auto.sh ]; then
  source /usr/local/share/chruby/chruby.sh
  source /usr/local/share/chruby/auto.sh
  chruby ruby-1.9.3-p392
fi

if [ -f ~/.git-completion.bash ]; then
  source ~/.git-completion.bash
fi

export LANG=bg_BG.UTF-8
export LC_TIME=bg_BG.UTF-8
export PS1="\u@\h:\w> "
export EDITOR='mate -w'
export PAGER=/usr/bin/less

shopt -s histappend
export HISTFILESIZE=100000000
export HISTSIZE=1000000
HISTTIMEFORMAT="+%Y-%m-%d %H:%M:%S"

# Aggressively save history after every command; reset terminal window title after closing SSH session
export PROMPT_COMMAND='history -a; echo -ne "\033]0;${ITERM_PROFILE}\007"'

export RSYNC_RSH=ssh

alias b=bundle
alias be='bundle exec'
alias gl='git log --oneline'

# Homebrew bash completion
if [ -f $(brew --prefix)/etc/bash_completion ]; then
  . $(brew --prefix)/etc/bash_completion
fi

# git prompt
if [ -f "$(brew --prefix)/opt/bash-git-prompt/share/gitprompt.sh" ]; then
    GIT_PROMPT_ONLY_IN_REPO=1

    # GIT_PROMPT_FETCH_REMOTE_STATUS=0   # uncomment to avoid fetching remote status

    # GIT_PROMPT_SHOW_UPSTREAM=1 # uncomment to show upstream tracking branch
    # GIT_PROMPT_SHOW_UNTRACKED_FILES=all # can be no, normal or all; determines counting of untracked files

    # GIT_PROMPT_SHOW_CHANGED_FILES_COUNT=0 # uncomment to avoid printing the number of changed files

    # GIT_PROMPT_STATUS_COMMAND=gitstatus_pre-1.7.10.sh # uncomment to support Git older than 1.7.10

    # GIT_PROMPT_START=...    # uncomment for custom prompt start sequence
    # GIT_PROMPT_END=...      # uncomment for custom prompt end sequence

    # as last entry source the gitprompt script
    # GIT_PROMPT_THEME=Custom # use custom theme specified in file GIT_PROMPT_THEME_FILE (default ~/.git-prompt-colors.sh)
    # GIT_PROMPT_THEME_FILE=~/.git-prompt-colors.sh
    # GIT_PROMPT_THEME=Solarized # use theme optimized for solarized color scheme
    source "$(brew --prefix)/opt/bash-git-prompt/share/gitprompt.sh"
fi

test -e "${HOME}/.iterm2_shell_integration.bash" && source "${HOME}/.iterm2_shell_integration.bash"