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@fish2000
Forked from miki725/.bash_prompt.sh
Last active January 30, 2019 07:40
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Custom bash prompt display: «virtualenv»:HOST-NAME:current_working_dir[git-branch •]$
#!/bin/bash
#
# DESCRIPTION:
#
# Set the bash prompt according to:
# * the active virtualenv
# * the branch of the current git/mercurial repository
# * the return value of the previous command
#
# USAGE:
#
# 1. Save this file as ~/.bash_prompt
# 2. Add the following line to the end of your ~/.bashrc or ~/.bash_profile:
# source ~/.bash_prompt
#
# LINEAGE:
#
# Based on work by woods: https://gist.github.com/31967
# Based on work by miki725: https://gist.github.com/miki725/9783474
# Based on work by fish2000: https://gist.github.com/fish2000/bb6b3ce711d3da904b48163ca80cb7ca
#
# The various escape codes that we can use to color our prompt.
RED="\[\033[0;31m\]"
LIGHT_RED="\[\033[1;31m\]"
YELLOW="\[\033[0;33m\]"
LIGHT_YELLOW="\[\033[1;33m\]"
GOLDENROD="\[\033[38;5;220m\]"
GREEN="\[\033[0;32m\]"
LIGHT_GREEN="\[\033[1;32m\]"
BLUE="\[\033[0;34m\]"
LIGHT_BLUE="\[\033[1;34m\]"
PURPLE="\[\033[0;35m\]"
LIGHT_PURPLE="\[\033[1;35m\]"
CYAN="\[\033[0;36m\]"
LIGHT_CYAN="\[\033[1;36m\]"
LIGHT_GRAY="\[\033[0;37m\]"
WHITE="\[\033[1;37m\]"
COLOR_NONE="\[\e[0m\]"
# determine git branch name
function parse_git_branch() {
git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/'
}
function parse_git_dirty() {
[[ $(git status 2> /dev/null | tail -n1) != "nothing to commit, working tree clean" ]] && echo " •"
}
# Determine the branch/state information for this git repository.
function set_git_branch() {
# Get the name of the branch.
branch=$(parse_git_branch)
# Set the final branch string.
if [[ $branch == "" ]]; then
BRANCH=""
else
BRANCH="[${LIGHT_CYAN}${branch}${COLOR_NONE}${LIGHT_RED}$(parse_git_dirty)${COLOR_NONE}]"
fi
}
# Return the prompt symbol to use, colorized based on the return value of the
# previous command.
function set_prompt_symbol() {
if test $1 -eq 0 ; then
PROMPT_SYMBOL="\$"
else
PROMPT_SYMBOL="${LIGHT_RED}\$${COLOR_NONE}"
fi
}
# Determine active Python virtualenv details.
function set_virtualenv() {
if test -z "$VIRTUAL_ENV"; then
PYTHON_VIRTUALENV=""
else
PYTHON_VIRTUALENV="«${GOLDENROD}$(basename ${VIRTUAL_ENV})${COLOR_NONE}»:"
fi
}
# Set the full bash prompt.
function set_bash_prompt() {
# Set the PROMPT_SYMBOL variable. We do this first so we don't lose the
# return value of the last command.
# set_prompt_symbol $?
# Set the PYTHON_VIRTUALENV and BRANCH variables.
set_virtualenv
set_git_branch
# Set the bash prompt variable.
# :${YELLOW}\w
PS1="${PYTHON_VIRTUALENV}\h:\W${BRANCH}\$ "
}
# Tell bash to execute this function just before displaying its prompt.
export PROMPT_COMMAND=set_bash_prompt
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