dotfiles/bash/scriptlets/ps1

# .bash_files
# /PS

# uncomment for a colored prompt, if the terminal has the capability; turned
# off by default to not distract the user: the focus in a terminal window
# should be on the output of commands, not on the prompt
force_color_prompt=yes

if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
	# We have color support; assume it's compliant with Ecma-48
	# (ISO/IEC-6429). (Lack of such support is extremely rare, and
	# a case would tend to support setf rather than setaf.)
	    color_prompt=yes
    else
	    color_prompt=
    fi
fi

# Old PS1
#if [ "$color_prompt" = yes ]; then
#	PS1='${debian_chroot:+($debian_chroot)}\[\033[00;32m\]\u@\H\[\033[00m\] \[\033[0;33;40m\](\t)\[\033[00m\] \[\033[01;34m\]\[$(ls |wc -l)\]@\W\[\033[00m\]:\$ '
#else
#	PS1='${debian_chroot:+($debian_chroot)}\u@\H (\t) \[$(ls | wc -l)\]@\W:\$ '
#fi


function color() {
	if [ -n "$force_color_prompt" ] ; then
		if [ -n "$color_prompt" ] ; then
			return 0
		else
			return 1
		fi
	else
		return 1
	fi
}

export PROMPT_COMMAND=__prompt_command

function __prompt_command() {
	local RETVAL=$?
	if [ ! $RETVAL -ne 0 ]; then
		RETVAL=0
	fi

	PS1="${debian_chroot:+($debian_chroot)}"

#Return Value
	if [ -n $RETVAL ]; then
		PS1+="$(retval ${RETVAL})"
	fi
### Add Git Status ### 
	if [[ $(command -v git) ]]; then
		PS1+="$(git_status) "
	fi
	

#user@hostname
	if color ; then
		PS1+="${Gre}\u${RCol}"
	else
		PS1+="\u"
	fi

	PS1+="@"

	if color ; then
		if [[ $HOSTNAME == 'fatserf' ]]; then
			PS1+="${Pur}\H${RCol}"
		elif [[ $HOSTNAME == 'lilo'* ]];  then
			PS1+="${BWhi}\H${RCol}"
		elif [[ $HOSTNAME == 'hg'* ]]; then
			PS1+="${BRed}\H${RCol}"
		else
			PS1+="${Blu}${On_Whi}\H${RCol}"
		fi
	else 
		PS1+="\H"
	fi

#time w/ seconds
	if color ;  then
		PS1+="${Yel}${On_Bla}"
	fi
	
	PS1+="(\t)"

	if color ; then
		PS1+="${RCol}"
	fi
	PS1+=" "
#dir count, pwd
	if color ; then
		PS1+="${BBlu}"
	fi

	PS1+="\[$(ls |wc -l)\]@\W"

	if color ; then
		PS1+="${RCol}"
	fi
	PS1+=" "
#UID
	PS1+=':\$ '
}

function retval() {
### Determine Return Value
	local PS1
	if [ -z "$color_prompt" ]; then
		PS1="[$1] "
	else
		if [ ! $1 == 0 ]; then
			PS1="${Red}×${RCol}"
		else
			PS1="${Gre}+${RCol}"
		fi
	fi

	echo "${PS1} "
}

function git_status() {
### Determine Git Status
		local PS1
		local GStat="$(git status --porcelain -b 2>/dev/null | tr '\n' ':')"

		if [ "$GStat" ]; then
			### Fetch Time Check ### {{{
			local LAST=$(stat -c %Y $(git rev-parse --git-dir 2>/dev/null)/FETCH_HEAD 2>/dev/null)
			if [ "${LAST}" ]; then
				local TIME=$(echo $(date +"%s") - ${LAST} | bc)
				## Check if more than 60 minutes since last
				if [ "${TIME}" -gt "3600" ]; then
					git fetch 2>/dev/null
					PS1+=' +'
					## Refresh var
					local GStat="$(git status --porcelain -b 2>/dev/null | tr '\n' ':')"
				fi
			fi
			### End Fetch Check ### }}}

			### Test For Changes ### {{{
			## Change this to test for 'ahead' or 'behind'!
			local GChanges="$(echo ${GStat} | tr ':' '\n' | grep -v "^$" | grep -v "^\#\#" | wc -l | tr -d ' ')"
			if [ "$GChanges" == "0" ]; then
				local GitCol=$Gre
			  else
				local GitCol=$Red
			fi
			### End Test Changes ### }}}

			### Find Branch ### {{{
			local GBra="$(echo ${GStat} | tr ':' '\n' | grep "^##" | cut -c4- | grep -o "^[a-zA-Z]\{1,\}[^\.]")"
			if [ "$GBra" ]; then
				if [ "$GBra" == "master" ]; then
					local GBra="M"			# Because why waste space
				fi
			  else
				local GBra="ERROR"			# It could happen supposedly?
			fi
			### End Branch ### }}}

			PS1+=" ${GitCol}[$GBra]${RCol}"	# Add result to prompt

			### Find Commit Status ### {{{
				## Test Modified and Untracked for "0"
#					# local GDel="$(echo ${GStat} | tr ':' '\n' | grep -c "^[ MARC]D")"

			local GAhe="$(echo ${GStat} | tr ':' '\n' | grep "^##" | grep -o "ahead [0-9]\{1,\}" | grep -o "[0-9]\{1,\}")"
			if [ "$GAhe" ]; then
				PS1+="${Gre}↑${RCol}${GAhe}"	# Ahead
			fi

			## Needs a `git fetch`
			local GBeh="$(echo ${GStat} | tr ':' '\n' | grep "^##" | grep -o "behind [0-9]\{1,\}" | grep -o "[0-9]\{1,\}")"
			if [ "$GBeh" ]; then
				PS1+="${Red}↓${RCol}${GBeh}"	# Behind
			fi

			local GMod="$(echo ${GStat} | tr ':' '\n' | grep -c "^[ MARC]M")"
			if [ "$GMod" -gt "0" ]; then
				PS1+="${Pur}≠${RCol}${GMod}"	# Modified
			fi

			local GUnt="$(echo ${GStat} | tr ':' '\n' | grep -c "^\?")"
			if [ "$GUnt" -gt "0" ]; then
				PS1+="${Yel}?${RCol}${GUnt}"	# Untracked
			fi
			### End Commit Status ### }}}
			
			echo "${PS1}"
		fi
}


# Git
# 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
}