How to show git branch in terminal and change terminal colours

To show git branch in terminal you need to edit your .bash_profile file or create if you don't have it. This file should be in your user's root directory. Open it with any text editor. For example:

open -t ~/.bash_profile

Then add this code to the bottom of .bash_profile:

parse_git_branch() {
    git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/ (\1)/'
}

export PS1="\u ::\[\033[01;33m\] \W\[\033[00m\] -\[\033[00;32m\]\$(parse_git_branch)\[\033[00m\] $ "

Where:

\u - stands for your user name;
\W - shows your current folder;
\$(parse_git_branch) - displays your current git branch;
Parts of code like \[\033[00;32m\] are responsible for changing the colours in terminal.

Eventually now your terminal input will look like this:

username :: folder - (git branch) $

Here are some other terminal colour codes you can use:

Regular colours:

[\033[00;30m] - Black
[\033[00;31m] - Red
[\033[00;32m] - Green
[\033[00;33m] - Yellow
[\033[00;34m] - Blue
[\033[00;35m] - Purple
[\033[00;36m] - Cyan
[\033[00;37m] - White

High intensity:

[\033[00;90m] - Black
[\033[00;91m] - Red
[\033[00;92m] - Green
[\033[00;93m] - Yellow
[\033[00;94m] - Blue
[\033[00;95m] - Purple
[\033[00;96m] - Cyan
[\033[00;97m] - White

Background:

[\033[40m] - Black
[\033[41m] - Red
[\033[42m] - Green
[\033[43m] - Yellow
[\033[44m] - Blue
[\033[45m] - Purple
[\033[46m] - Cyan
[\033[47m] - White

Backgrounds with high intensity:

[\033[00;100m] - Black
[\033[00;101m] - Red
[\033[00;102m] - Green
[\033[00;103m] - Yellow
[\033[00;104m] - Blue
[\033[10;95m] - Purple
[\033[00;106m] - Cyan
[\033[00;107m] - White

You can replace any leading second 0; with 1; for bold colours and replace any leading second 0; with 4; to get text underlined.

Note that if you already have PS1 variable, then you'll just need to modify it by adding this code to the end of PS1:

-\[\033[00;32m\]\$(parse_git_branch)\[\033[00m\] $