.bashrc

#
# ~/.bashrc
#


[[ $- != *i* ]] && return

colors() {
	local fgc bgc vals seq0

	printf "Color escapes are %s\n" '\e[${value};...;${value}m'
	printf "Values 30..37 are \e[33mforeground colors\e[m\n"
	printf "Values 40..47 are \e[43mbackground colors\e[m\n"
	printf "Value  1 gives a  \e[1mbold-faced look\e[m\n\n"

	# foreground colors
	for fgc in {30..37}; do
		# background colors
		for bgc in {40..47}; do
			fgc=${fgc#37} # white
			bgc=${bgc#40} # black

			vals="${fgc:+$fgc;}${bgc}"
			vals=${vals%%;}

			seq0="${vals:+\e[${vals}m}"
			printf "  %-9s" "${seq0:-(default)}"
			printf " ${seq0}TEXT\e[m"
			printf " \e[${vals:+${vals+$vals;}}1mBOLD\e[m"
		done
		echo; echo
	done
}

[ -r /usr/share/bash-completion/bash_completion ] && . /usr/share/bash-completion/bash_completion

# Change the window title of X terminals
case ${TERM} in
	xterm*|rxvt*|Eterm*|aterm|kterm|gnome*|interix|konsole*)
		PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME%%.*}:${PWD/#$HOME/\~}\007"'
		;;
	screen*)
		PROMPT_COMMAND='echo -ne "\033_${USER}@${HOSTNAME%%.*}:${PWD/#$HOME/\~}\033\\"'
		;;
esac

use_color=true

# Set colorful PS1 only on colorful terminals.
# dircolors --print-database uses its own built-in database
# instead of using /etc/DIR_COLORS.  Try to use the external file
# first to take advantage of user additions.  Use internal bash
# globbing instead of external grep binary.
safe_term=${TERM//[^[:alnum:]]/?}   # sanitize TERM
match_lhs=""
[[ -f ~/.dir_colors   ]] && match_lhs="${match_lhs}$(<~/.dir_colors)"
[[ -f /etc/DIR_COLORS ]] && match_lhs="${match_lhs}$(</etc/DIR_COLORS)"
[[ -z ${match_lhs}    ]] \
	&& type -P dircolors >/dev/null \
	&& match_lhs=$(dircolors --print-database)
[[ $'\n'${match_lhs} == *$'\n'"TERM "${safe_term}* ]] && use_color=true

if ${use_color} ; then
	# Enable colors for ls, etc.  Prefer ~/.dir_colors #64489
	if type -P dircolors >/dev/null ; then
		if [[ -f ~/.dir_colors ]] ; then
			eval $(dircolors -b ~/.dir_colors)
		elif [[ -f /etc/DIR_COLORS ]] ; then
			eval $(dircolors -b /etc/DIR_COLORS)
		fi
	fi

	if [[ ${EUID} == 0 ]] ; then
		PS1='\[\033[01;31m\][\h\[\033[01;36m\] \W\[\033[01;31m\]]\$\[\033[00m\] '
	else
		PS1='\[\033[01;32m\][\u@\h\[\033[01;37m\] \W\[\033[01;32m\]]\$\[\033[00m\] '
	fi

	alias ls='ls --color=auto'
	alias grep='grep --colour=auto'
	alias egrep='egrep --colour=auto'
	alias fgrep='fgrep --colour=auto'
else
	if [[ ${EUID} == 0 ]] ; then
		# show root@ when we don't have colors
		PS1='\u@\h \W \$ '
	else
		PS1='\u@\h \w \$ '
	fi
fi

unset use_color safe_term match_lhs sh

alias cp="cp -i"                          # confirm before overwriting something
alias df='df -h'                          # human-readable sizes
alias free='free -m'                      # show sizes in MB
alias np='nano -w PKGBUILD'
alias more=less

xhost +local:root > /dev/null 2>&1

complete -cf sudo

# Bash won't get SIGWINCH if another process is in the foreground.
# Enable checkwinsize so that bash will check the terminal size when
# it regains control.  #65623
# http://cnswww.cns.cwru.edu/~chet/bash/FAQ (E11)
shopt -s checkwinsize

shopt -s expand_aliases

# export QT_SELECT=4

# Enable history appending instead of overwriting.  #139609
shopt -s histappend

#
# # ex - archive extractor
# # usage: ex <file>
ex ()
{
  if [ -f $1 ] ; then
    case $1 in
      *.tar.bz2)   tar xjf $1   ;;
      *.tar.gz)    tar xzf $1   ;;
      *.bz2)       bunzip2 $1   ;;
      *.rar)       unrar x $1     ;;
      *.gz)        gunzip $1    ;;
      *.tar)       tar xf $1    ;;
      *.tbz2)      tar xjf $1   ;;
      *.tgz)       tar xzf $1   ;;
      *.zip)       unzip $1     ;;
      *.Z)         uncompress $1;;
      *.7z)        7z x $1      ;;
      *)           echo "'$1' cannot be extracted via ex()" ;;
    esac
  else
    echo "'$1' is not a valid file"
  fi
}

export VISUAL=vim
bash_prompt_command() {
	# How many characters of the $PWD should be kept
	local pwdmaxlen=25

	# Indicate that there has been dir truncation
	local trunc_symbol=".."

	# Store local dir
	local dir=${PWD##*/}

	# Which length to use
	pwdmaxlen=$(( ( pwdmaxlen < ${#dir} ) ? ${#dir} : pwdmaxlen ))

	NEW_PWD=${PWD/#$HOME/\~}

	local pwdoffset=$(( ${#NEW_PWD} - pwdmaxlen ))

	# Generate name
	if [ ${pwdoffset} -gt "0" ]
	then
		NEW_PWD=${NEW_PWD:$pwdoffset:$pwdmaxlen}
		NEW_PWD=${trunc_symbol}/${NEW_PWD#*/}
	fi
}




##
##	GENERATE A FORMAT SEQUENCE
##
format_font()
{
	## FIRST ARGUMENT TO RETURN FORMAT STRING
	local output=$1


	case $# in
	2)
		eval $output="'\[\033[0;${2}m\]'"
		;;
	3)
		eval $output="'\[\033[0;${2};${3}m\]'"
		;;
	4)
		eval $output="'\[\033[0;${2};${3};${4}m\]'"
		;;
	*)
		eval $output="'\[\033[0m\]'"
		;;
	esac
}



##
## COLORIZE BASH PROMT
##
bash_prompt() {

	############################################################################
	## COLOR CODES                                                            ##
	## These can be used in the configuration below                           ##
	############################################################################

	## FONT EFFECT
	local      NONE='0'
	local      BOLD='1'
	local       DIM='2'
	local UNDERLINE='4'
	local     BLINK='5'
	local    INVERT='7'
	local    HIDDEN='8'


	## COLORS
	local   DEFAULT='9'
	local     BLACK='0'
	local       RED='1'
	local     GREEN='2'
	local    YELLOW='3'
	local      BLUE='4'
	local   MAGENTA='5'
	local      CYAN='6'
	local    L_GRAY='7'
	local    D_GRAY='60'
	local     L_RED='61'
	local   L_GREEN='62'
	local  L_YELLOW='63'
	local    L_BLUE='64'
	local L_MAGENTA='65'
	local    L_CYAN='66'
	local     WHITE='67'


	## TYPE
	local     RESET='0'
	local    EFFECT='0'
	local     COLOR='30'
	local        BG='40'


	## 256 COLOR CODES
	local NO_FORMAT="\[\033[0m\]"
	local ORANGE_BOLD="\[\033[1;38;5;208m\]"
	local TOXIC_GREEN_BOLD="\[\033[1;38;5;118m\]"
	local RED_BOLD="\[\033[1;38;5;1m\]"
	local CYAN_BOLD="\[\033[1;38;5;87m\]"
	local BLACK_BOLD="\[\033[1;38;5;0m\]"
	local WHITE_BOLD="\[\033[1;38;5;15m\]"
	local GRAY_BOLD="\[\033[1;90m\]"
	local BLUE_BOLD="\[\033[1;38;5;74m\]"





	##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##
	  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##
	##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##



	##                          CONFIGURE HERE                                ##



	############################################################################
	## CONFIGURATION                                                          ##
	## Choose your color combination here                                     ##
	############################################################################
	local FONT_COLOR_1=$WHITE
	local BACKGROUND_1=$BLUE
	local TEXTEFFECT_1=$BOLD

	local FONT_COLOR_2=$WHITE
	local BACKGROUND_2=$L_BLUE
	local TEXTEFFECT_2=$BOLD

	local FONT_COLOR_3=$D_GRAY
	local BACKGROUND_3=$WHITE
	local TEXTEFFECT_3=$BOLD

	local PROMT_FORMAT=$BLUE_BOLD


	############################################################################
	## EXAMPLE CONFIGURATIONS                                                 ##
	## I use them for different hosts. Test them out ;)                       ##
	############################################################################

	## CONFIGURATION: BLUE-WHITE
	if [ "$HOSTNAME" = dell ]; then
		FONT_COLOR_1=$WHITE; BACKGROUND_1=$BLUE; TEXTEFFECT_1=$BOLD
		FONT_COLOR_2=$WHITE; BACKGROUND_2=$L_BLUE; TEXTEFFECT_2=$BOLD
		FONT_COLOR_3=$D_GRAY; BACKGROUND_3=$WHITE; TEXTEFFECT_3=$BOLD
		PROMT_FORMAT=$CYAN_BOLD
	fi

	## CONFIGURATION: BLACK-RED
	if [ "$HOSTNAME" = giraff6 ]; then
		FONT_COLOR_1=$WHITE; BACKGROUND_1=$BLACK; TEXTEFFECT_1=$BOLD
		FONT_COLOR_2=$WHITE; BACKGROUND_2=$D_GRAY; TEXTEFFECT_2=$BOLD
		FONT_COLOR_3=$WHITE; BACKGROUND_3=$RED; TEXTEFFECT_3=$BOLD
		PROMT_FORMAT=$RED_BOLD
	fi

	## CONFIGURATION: RED-BLACK
	#FONT_COLOR_1=$WHITE; BACKGROUND_1=$RED; TEXTEFFECT_1=$BOLD
	#FONT_COLOR_2=$WHITE; BACKGROUND_2=$D_GRAY; TEXTEFFECT_2=$BOLD
	#FONT_COLOR_3=$WHITE; BACKGROUND_3=$BLACK; TEXTEFFECT_3=$BOLD
	#PROMT_FORMAT=$RED_BOLD

	## CONFIGURATION: CYAN-BLUE
	if [ "$HOSTNAME" = sharkoon ]; then
		FONT_COLOR_1=$BLACK; BACKGROUND_1=$L_CYAN; TEXTEFFECT_1=$BOLD
		FONT_COLOR_2=$WHITE; BACKGROUND_2=$L_BLUE; TEXTEFFECT_2=$BOLD
		FONT_COLOR_3=$WHITE; BACKGROUND_3=$BLUE; TEXTEFFECT_3=$BOLD
		PROMT_FORMAT=$CYAN_BOLD
	fi

	## CONFIGURATION: GRAY-SCALE
	if [ "$HOSTNAME" = giraff ]; then
		FONT_COLOR_1=$WHITE; BACKGROUND_1=$BLACK; TEXTEFFECT_1=$BOLD
		FONT_COLOR_2=$WHITE; BACKGROUND_2=$D_GRAY; TEXTEFFECT_2=$BOLD
		FONT_COLOR_3=$WHITE; BACKGROUND_3=$L_GRAY; TEXTEFFECT_3=$BOLD
		PROMT_FORMAT=$BLACK_BOLD
	fi

	## CONFIGURATION: GRAY-CYAN
	if [ "$HOSTNAME" = light ]; then
		FONT_COLOR_1=$WHITE; BACKGROUND_1=$BLACK; TEXTEFFECT_1=$BOLD
		FONT_COLOR_2=$WHITE; BACKGROUND_2=$D_GRAY; TEXTEFFECT_2=$BOLD
		FONT_COLOR_3=$BLACK; BACKGROUND_3=$L_CYAN; TEXTEFFECT_3=$BOLD
		PROMT_FORMAT=$CYAN_BOLD
	fi


	##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##
	  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##
	##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##  ##




	############################################################################
	## TEXT FORMATING                                                         ##
	## Generate the text formating according to configuration                 ##
	############################################################################

	## CONVERT CODES: add offset
	FC1=$(($FONT_COLOR_1+$COLOR))
	BG1=$(($BACKGROUND_1+$BG))
	FE1=$(($TEXTEFFECT_1+$EFFECT))

	FC2=$(($FONT_COLOR_2+$COLOR))
	BG2=$(($BACKGROUND_2+$BG))
	FE2=$(($TEXTEFFECT_2+$EFFECT))

	FC3=$(($FONT_COLOR_3+$COLOR))
	BG3=$(($BACKGROUND_3+$BG))
	FE3=$(($TEXTEFFECT_3+$EFFECT))

	FC4=$(($FONT_COLOR_4+$COLOR))
	BG4=$(($BACKGROUND_4+$BG))
	FE4=$(($TEXTEFFECT_4+$EFFECT))


	## CALL FORMATING HELPER FUNCTION: effect + font color + BG color
	local TEXT_FORMAT_1
	local TEXT_FORMAT_2
	local TEXT_FORMAT_3
	local TEXT_FORMAT_4
	format_font TEXT_FORMAT_1 $FE1 $FC1 $BG1
	format_font TEXT_FORMAT_2 $FE2 $FC2 $BG2
	format_font TEXT_FORMAT_3 $FC3 $FE3 $BG3
	format_font TEXT_FORMAT_4 $FC4 $FE4 $BG4


	# GENERATE PROMT SECTIONS
	local PROMT_USER=$"$TEXT_FORMAT_1 \u "
	local PROMT_HOST=$"$TEXT_FORMAT_2 \h "
	local PROMT_PWD=$"$TEXT_FORMAT_3 \${NEW_PWD} "
	local PROMT_INPUT=$"$PROMT_FORMAT "


	############################################################################
	## SEPARATOR FORMATING                                                    ##
	## Generate the separators between sections                               ##
	## Uses background colors of the sections                                 ##
	############################################################################

	## CONVERT CODES
	TSFC1=$(($BACKGROUND_1+$COLOR))
	TSBG1=$(($BACKGROUND_2+$BG))

	TSFC2=$(($BACKGROUND_2+$COLOR))
	TSBG2=$(($BACKGROUND_3+$BG))

	TSFC3=$(($BACKGROUND_3+$COLOR))
	TSBG3=$(($DEFAULT+$BG))


	## CALL FORMATING HELPER FUNCTION: effect + font color + BG color
	local SEPARATOR_FORMAT_1
	local SEPARATOR_FORMAT_2
	local SEPARATOR_FORMAT_3
	format_font SEPARATOR_FORMAT_1 $TSFC1 $TSBG1
	format_font SEPARATOR_FORMAT_2 $TSFC2 $TSBG2
	format_font SEPARATOR_FORMAT_3 $TSFC3 $TSBG3


	# GENERATE SEPARATORS WITH FANCY TRIANGLE
	local TRIANGLE=$'\uE0B0'
	local SEPARATOR_1=$SEPARATOR_FORMAT_1$TRIANGLE
	local SEPARATOR_2=$SEPARATOR_FORMAT_2$TRIANGLE
	local SEPARATOR_3=$SEPARATOR_FORMAT_3$TRIANGLE



	############################################################################
	## WINDOW TITLE                                                           ##
	## Prevent messed up terminal-window titles                               ##
	############################################################################
	case $TERM in
	xterm*|rxvt*)
		local TITLEBAR='\[\033]0;\u:${NEW_PWD}\007\]'
		;;
	*)
		local TITLEBAR=""
		;;
	esac


  # git support
  parse_git_branch() {
    BRANCH=$(git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/')
    if [ "$BRANCH" != "" ]; then
      echo "${BRANCH} "
    fi
  }


	############################################################################
	## BASH PROMT                                                             ##
	## Generate promt and remove format from the rest                         ##
	############################################################################
	PS1="$TITLEBAR\n${PROMT_USER}${SEPARATOR_1}${PROMT_HOST}${SEPARATOR_2}${PROMT_PWD}${SEPARATOR_3}${PROMT_INPUT}\$(parse_git_branch)"



	## For terminal line coloring, leaving the rest standard
	none="$(tput sgr0)"
	trap 'echo -ne "${none}"' DEBUG
}




################################################################################
##  MAIN                                                                      ##
################################################################################

##	Bash provides an environment variable called PROMPT_COMMAND.
##	The contents of this variable are executed as a regular Bash command
##	just before Bash displays a prompt.
##	We want it to call our own command to truncate PWD and store it in NEW_PWD
PROMPT_COMMAND=bash_prompt_command

##	Call bash_promnt only once, then unset it (not needed any more)
##	It will set $PS1 with colors and relative to $NEW_PWD,
##	which gets updated by $PROMT_COMMAND on behalf of the terminal
bash_prompt
unset bash_prompt

## c: cd into a directory and ls it
c() { cd "$@" && ls; }


### EOF ###