Add Git Branch Name Into PS1

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

export PS1="\[\033[01;32m\]\u\[\033[00m\]@\[\033[01;34m\]\h\[\033[01;30m\]\$(parse_git_branch)\[\033[00m\]: "

Preview Inside Git Repostory

Inside Git Repository

Show Current Directory in Title Bar

PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME}: ${PWD}\007"'

Preview Current Directory on Title Bar

Outside Git Repository

Instead of showing full path in title bar (PROMPT_COMMAND), we will replace our home directory name with ~ character. First we need to get current path with variable PWD, then replace home directory name with ~ character.

# This function will generate current directory name with '~' as replacement
# of home directory name
render_title() {
    # note that instead of '/' character, we use '#' character as separator
    # of sed command
    echo ${PWD} | sed -e "s#${HOME}#~#g"
}

# Now we call function above into PROMPT_COMMAND
PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME}: $(render_title)\007"'

The Result

Home Directory Replacement

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

# color code
blue() {
    echo "\[\033[01;34m\]"
}
cyan() {
    echo "\[\033[01;36m\]"
}
gray() {
    echo "\[\033[01;30m\]"
}
green() {
    echo "\[\033[01;32m\]"
}
reset() {
    echo "\[\033[00m\]"
}

# formatting
bold() {
    echo "\e[1m"
}
dim() {
    echo "\e[2m"
}

# actual PS1
export PS1="$(cyan)[\t] $(green)\u$(reset)@$(blue)\h$(gray)\$(parse_git_branch): $(cyan)\e[95m\e[2m[\w]$(reset)\n\\$ "

# change ${HOME} with '~'
render_title() {
    echo ${PWD} | sed -e "s#${HOME}#~#g"
}

# actual prompt command
PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME}:$(render_title)\007"'

Final result

Final result

Reference