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Set color bash prompt according to git/svn branch, and return status of last command.
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#!/bin/bash | |
# | |
# DESCRIPTION: | |
# | |
# Set the bash prompt according to: | |
# * the branch/status of the current git repository | |
# * the branch of the current subversion repository | |
# * the return value of the previous command | |
# | |
# USAGE: | |
# | |
# 1. Save this file as ~/.git_svn_bash_prompt | |
# 2. Add the following line to the end of your ~/.profile or ~/.bash_profile: | |
# . ~/.git_svn_bash_prompt | |
# | |
# AUTHOR: | |
# | |
# Scott Woods <[email protected]> | |
# West Arete Computing | |
# | |
# Based on work by halbtuerke and lakiolen. | |
# | |
# http://gist.github.com/31967 | |
# The various escape codes that we can use to color our prompt. | |
RED="\[\033[0;31m\]" | |
YELLOW="\[\033[0;33m\]" | |
GREEN="\[\033[0;32m\]" | |
BLUE="\[\033[0;34m\]" | |
LIGHT_RED="\[\033[1;31m\]" | |
LIGHT_GREEN="\[\033[1;32m\]" | |
WHITE="\[\033[1;37m\]" | |
LIGHT_GRAY="\[\033[0;37m\]" | |
COLOR_NONE="\[\e[0m\]" | |
# Detect whether the current directory is a git repository. | |
function is_git_repository { | |
git branch > /dev/null 2>&1 | |
} | |
# Detect whether the current directory is a subversion repository. | |
function is_svn_repository { | |
test -d .svn | |
} | |
# Determine the branch/state information for this git repository. | |
function set_git_branch { | |
# Capture the output of the "git status" command. | |
git_status="$(git status 2> /dev/null)" | |
# Set color based on clean/staged/dirty. | |
if [[ ${git_status} =~ "working directory clean" ]]; then | |
state="${GREEN}" | |
elif [[ ${git_status} =~ "Changes to be committed" ]]; then | |
state="${YELLOW}" | |
else | |
state="${RED}" | |
fi | |
# Set arrow icon based on status against remote. | |
remote_pattern="# Your branch is (.*) of" | |
if [[ ${git_status} =~ ${remote_pattern} ]]; then | |
if [[ ${BASH_REMATCH[1]} == "ahead" ]]; then | |
remote="↑" | |
else | |
remote="↓" | |
fi | |
else | |
remote="" | |
fi | |
diverge_pattern="# Your branch and (.*) have diverged" | |
if [[ ${git_status} =~ ${diverge_pattern} ]]; then | |
remote="↕" | |
fi | |
# Get the name of the branch. | |
branch_pattern="^# On branch ([^${IFS}]*)" | |
if [[ ${git_status} =~ ${branch_pattern} ]]; then | |
branch=${BASH_REMATCH[1]} | |
fi | |
# Set the final branch string. | |
BRANCH="${state}(${branch})${remote}${COLOR_NONE} " | |
} | |
# Determine the branch information for this subversion repository. No support | |
# for svn status, since that needs to hit the remote repository. | |
function set_svn_branch { | |
# Capture the output of the "git status" command. | |
svn_info="$(svn info | egrep '^URL: ' 2> /dev/null)" | |
# Get the name of the branch. | |
branch_pattern="^URL: .*/(branches|tags)/([^/]+)" | |
trunk_pattern="^URL: .*/trunk(/.*)?$" | |
if [[ ${svn_info} =~ $branch_pattern ]]; then | |
branch=${BASH_REMATCH[2]} | |
elif [[ ${svn_info} =~ $trunk_pattern ]]; then | |
branch='trunk' | |
fi | |
# Set the final branch string. | |
BRANCH="(${branch}) " | |
} | |
# Return the prompt symbol to use, colorized based on the return value of the | |
# previous command. | |
function set_prompt_symbol () { | |
if test $1 -eq 0 ; then | |
PROMPT_SYMBOL="\$" | |
else | |
PROMPT_SYMBOL="${RED}\$${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 BRANCH variable. | |
if is_git_repository ; then | |
set_git_branch | |
elif is_svn_repository ; then | |
set_svn_branch | |
else | |
BRANCH='' | |
fi | |
# Set the bash prompt variable. | |
PS1="\u@\h \w ${BRANCH}${PROMPT_SYMBOL} " | |
} | |
# Tell bash to execute this function just before displaying its prompt. | |
PROMPT_COMMAND=set_bash_prompt |
Just a heads up, Git 2.0 breaks this. Easily fixed while maintaining backwards compatability by removing the '# '
from the regex.
I seen on systems that have localized output message, this line could fail return empty string:
branch_pattern="^(# )?On branch ([^${IFS}]*)"
so possible fix for this issue could be:
branch_pattern="^(# )?[a-zA-Z]+ branch ([^${IFS}]*)"
Well I tried many things that you guys said, but the easier one is to change the line 80:
branch=${BASH_REMATCH[1]}
to
branch=${BASH_REMATCH[2]}
Working version of this here (added Virtualenv and Conda support also)...
https://github.com/spindi/setup/blob/master/bash/prompt.sh
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This is a nice share, thanks!
I had to change line 84 to use (git rev-parse --abbrev-ref HEAD) to get the branch name to display, using git version 1.9.1: