.bash_prompt

###################################
# Color Declerations
###################################
TEAL_USER=$(tput setaf 29)
ORANGE_BRANCH=$(tput setaf 202)
WHITE_ACCENTS=$(tput setaf 230)
YELLOW_GIT_STATUS=$(tput setaf 220)
YELLOW_FOLDER=$(tput setaf 136)

###################################
# New Git Tracking System
###################################
__powerline() {
    # Unicode symbols
    GIT_BRANCH_SYMBOL='⑂ '
    GIT_BRANCH_CHANGED_SYMBOL='+'
    GIT_NEED_PUSH_SYMBOL='↾'
    GIT_NEED_PULL_SYMBOL='⇂'
    RESET="\[$(tput sgr0)\]"

    __git_info() {
      # git not found
      [ -x "$(which git)" ] || return
      # force git output in English to make our work easier
      local git_eng="env LANG=C git"
      # get current branch name or short SHA1 hash for detached head
      local branch="$($git_eng symbolic-ref --short HEAD 2>/dev/null || $git_eng describe --tags --always 2>/dev/null)"
      # git branch not found
      [ -n "$branch" ] || return
      local marks
      # branch is modified?
      [ -n "$($git_eng status --porcelain)" ] && marks+=" $GIT_BRANCH_CHANGED_SYMBOL"
      # how many commits local branch is ahead/behind of remote?
      local stat="$($git_eng status --porcelain --branch | grep '^##' | grep -o '\[.\+\]$')"
      local aheadN="$(echo $stat | grep -o 'ahead [[:digit:]]\+' | grep -o '[[:digit:]]\+')"
      local behindN="$(echo $stat | grep -o 'behind [[:digit:]]\+' | grep -o '[[:digit:]]\+')"
      [ -n "$aheadN" ] && marks+=" $GIT_NEED_PUSH_SYMBOL$aheadN"
      [ -n "$behindN" ] && marks+=" $GIT_NEED_PULL_SYMBOL$behindN"
      # print the git branch segment without a trailing newline
      printf "$WHITE_ACCENTS$GIT_BRANCH_SYMBOL$ORANGE_BRANCH$branch$YELLOW_GIT_STATUS$marks"
    }

    ps1() {
      # Base PS1 prompt
      PS1="\[$TEAL_USER\]\u\[ \]\[$WHITE_ACCENTS\]in\[ \]\[$YELLOW_FOLDER\]\w "
      # Add Git Info and New Line and end to PS1 prompt
      PS1+="$(__git_info)\[$WHITE_ACCENTS\]\n$\[$RESET\]\[ \]"
    }
    PROMPT_COMMAND=ps1
}

__powerline
unset __powerline