Bash Prompt

.bash_prompt

# set colors for prompt
        RED="\[\033[0;31m\]"
     YELLOW="\[\033[1;33m\]"
      GREEN="\[\033[0;32m\]"
       BLUE="\[\033[1;34m\]"
    MAGENTA="\[\033[1;35m\]"
  LIGHT_RED="\[\033[1;31m\]"
LIGHT_GREEN="\[\033[1;32m\]"
      WHITE="\[\033[1;37m\]"
 LIGHT_GRAY="\[\033[0;37m\]"
 COLOR_NONE="\[\e[0m\]"

# Return the prompt symbol to use, colorized based on the return value of the
# previous command.
function set_prompt_symbol () {
  if test $1 -eq 0 ; then
    PROMPT_SYMBOL="${LIGHT_GRAY}\$${COLOR_NONE}"
  else
    PROMPT_SYMBOL="${LIGHT_RED}\$${COLOR_NONE}"
  fi
}

# Check if in a pipenv
function set_pipenv_prompt {
  if [ -z "$PIPENV_ACTIVE" ]; then
    PIPENV=""
  else
    PIPENV="${GREEN}[pipenv]${COLOR_NONE}"
  fi
}

# Detect whether the current directory is a git repository.
function is_git_repository {
  git branch > /dev/null 2>&1
}

# Determine the branch/state information for this git repository.
function set_git_branch {
  if is_git_repository ; then
    # Capture the output of the "git status" command.
    git_status="$(git status 2> /dev/null)"

    # Set color based on clean/staged/dirty.
    if [[ ${git_status} =~ "working tree clean" ]]; then
      state=""
    elif [[ ${git_status} =~ "Changes to be committed" ]]; then
      state="${YELLOW}X${COLOR_NONE}"
    else
      state="${LIGHT_RED}X${COLOR_NONE}"
    fi

    # Set arrow icon based on status against remote.
    remote=""
    remote_ahead_pattern="Your branch is ahead of"
    remote_behind_pattern="Your branch is behind"
    remote_diverge_pattern="Your branch and (.*) have diverged"
    if [[ ${git_status} =~ ${remote_ahead_pattern} ]]; then
      remote="${YELLOW}^${COLOR_NONE}"
    elif [[ ${git_status} =~ ${remote_behind_pattern} ]]; then
      remote="${YELLOW}v${COLOR_NONE}"
    elif [[ ${git_status} =~ ${remote_diverge_pattern} ]]; then
      remote="${YELLOW}~${COLOR_NONE}"
    fi

    # Get the name of the branch.
    branch_pattern="On branch ([a-zA-Z0-9\_\-\.]*)"
    if [[ ${git_status} =~ ${branch_pattern} ]]; then
      branch="${MAGENTA}(${BASH_REMATCH[1]})${COLOR_NONE}"
    fi

    # Set the final branch string.
    BRANCH="${branch}${state}${remote}"
  else
    BRANCH=''
  fi
}

function set_bash_prompt () {
  set_prompt_symbol $?
  set_git_branch
  set_pipenv_prompt
  export PS1="${YELLOW}\u${BLUE}@\h ${GREEN}\w${COLOR_NONE} ${BRANCH}\n${PIPENV}${PROMPT_SYMBOL} "
}

PROMPT_COMMAND=set_bash_prompt