Shell prompt

bash-prompt.sh

# Special
\e # an ASCII escape character (033)
\h   # the hostname up to the first `.'
\H   # the hostname
\j   # the number of jobs currently managed by the shell
\l   # the basename of the shell's terminal device name
\n   # newline
\r   # carriage return
\t   # the current time in 24-hour HH:MM:SS format
\T   # the current time in 12-hour HH:MM:SS format
\@   # the current time in 12-hour am/pm format
\A   # the current time in 24-hour HH:MM format
\u   # the username of the current user
\w   # the current working directory, with $HOME abbreviated with a tilde (uses the value of the PROMPT_DIRTRIM variable)
\W   # the basename of the current working directory, with $HOME abbreviated with a tilde
\!   # the history number of this command
\#   # the command number of this command
\$   # if the effective UID is 0, a #, otherwise a $
\nnn # the character corresponding to the octal number nnn
\\   # a backslash
\[   # begin a sequence of non-printing characters, which could be used to embed a terminal control sequence into the prompt
\]   # end a sequence of non-printing characters

# Colours
\033]01;31\] # pink
\033]00m\]   # white
\033]01;36\] # bold green
\033]02;36\] # green
\033]01;34\] # blue
\033]01;33\] # bold yellow
    
# Ex 1.
PS1='[\033[00m\][\W]\$ '
# [ white ] [ working dir ] $



# Ex git - git status
# get current branch in git repo
function parse_git_branch() {
	BRANCH=`git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/'`
	if [ ! "${BRANCH}" == "" ]
	then
		STAT=`parse_git_dirty`
		echo "[${BRANCH}${STAT}]"
	else
		echo ""
	fi
}

# get current status of git repo
function parse_git_dirty {
	status=`git status 2>&1 | tee`
	dirty=`echo -n "${status}" 2> /dev/null | grep "modified:" &> /dev/null; echo "$?"`
	untracked=`echo -n "${status}" 2> /dev/null | grep "Untracked files" &> /dev/null; echo "$?"`
	ahead=`echo -n "${status}" 2> /dev/null | grep "Your branch is ahead of" &> /dev/null; echo "$?"`
	newfile=`echo -n "${status}" 2> /dev/null | grep "new file:" &> /dev/null; echo "$?"`
	renamed=`echo -n "${status}" 2> /dev/null | grep "renamed:" &> /dev/null; echo "$?"`
	deleted=`echo -n "${status}" 2> /dev/null | grep "deleted:" &> /dev/null; echo "$?"`
	bits=''
	if [ "${renamed}" == "0" ]; then
		bits=">${bits}"
	fi
	if [ "${ahead}" == "0" ]; then
		bits="*${bits}"
	fi
	if [ "${newfile}" == "0" ]; then
		bits="+${bits}"
	fi
	if [ "${untracked}" == "0" ]; then
		bits="?${bits}"
	fi
	if [ "${deleted}" == "0" ]; then
		bits="x${bits}"
	fi
	if [ "${dirty}" == "0" ]; then
		bits="!${bits}"
	fi
	if [ ! "${bits}" == "" ]; then
		echo " ${bits}"
	else
		echo ""
	fi
}

export PS1="\`parse_git_branch\` "