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Show Git dirty status in your Unix bash prompt (symbols not compatible with CygWin)
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="\[\e[0m\]"
function parse_git_branch {
git rev-parse --git-dir &> /dev/null
git_status="$(git status 2> /dev/null)"
branch_pattern="^# On branch ([^${IFS}]*)"
remote_pattern="# Your branch is (.*) of"
diverge_pattern="# Your branch and (.*) have diverged"
if [[ ! ${git_status} =~ "working directory clean" ]]; then
state="${RED}"
fi
# add an else if or two here if you want to get more specific
if [[ ${git_status} =~ ${remote_pattern} ]]; then
if [[ ${BASH_REMATCH[1]} == "ahead" ]]; then
remote="${YELLOW}"
else
remote="${YELLOW}"
fi
fi
if [[ ${git_status} =~ ${diverge_pattern} ]]; then
remote="${YELLOW}"
fi
if [[ ${git_status} =~ ${branch_pattern} ]]; then
branch=${BASH_REMATCH[1]}
echo " (${branch})${remote}${state}"
fi
}
function prompt_func() {
previous_return_value=$?;
# prompt="${TITLEBAR}$BLUE[$RED\w$GREEN$(__git_ps1)$YELLOW$(git_dirty_flag)$BLUE]$COLOR_NONE "
prompt="${TITLEBAR}${BLUE}[${RED}\w${GREEN}$(parse_git_branch)${BLUE}]${COLOR_NONE} "
if test $previous_return_value -eq 0
then
PS1="${prompt}"
else
PS1="${prompt}${RED}${COLOR_NONE} "
fi
}
PROMPT_COMMAND=prompt_func
@jonstefansson

I source'd this on my Mac and got gistfile1.sh: line 11: syntax error near unexpected token `{. When I opened the file in TextMate, I noticed the line endings were CRLF (Windows). I saved the file with LF and was able to execute the script. I think this may be very helpful. Thanks. See you at NFJS in Redmond!

@LightGuard

Matthew, is this zsh friendly as well?

@matthewmccullough

I have a better total-config setup for you that includes my latest ZSH derivations. It is at https://github.com/matthewmccullough/MatthewsShellConfig

@btv

Hey, thank you for posting that. I found a different one the internet a long time ago. Posting a comment here because it's related.
https://gist.github.com/932742

@matthewmccullough

Glad to have provided it and also a nod to @halbtuerke who started the bulk of this code.

@HowlingMind

This is great. Exactly what I was looking for. Really the only thing I changed (other than the prompt itself) was to clear the state variable every run. It was always saying my repo was dirty once it had been dirty. I actually just put an else and made a blue "C" for clean working state.

Update: Added number of commits ahead/behind.

@matthewmccullough
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