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bashrc prompt functions including git branch tools

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.bashrc
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##colour codes - stolen from https://wiki.archlinux.org/index.php/Color_Bash_Prompt
#requires 256 color terminal
#
# Reset
Color_Off='\e[0m' # Text Reset
 
# Regular Colors
Black='\e[0;30m' # Black
Red='\e[0;31m' # Red
Green='\e[0;32m' # Green
Yellow='\e[0;33m' # Yellow
Blue='\e[0;34m' # Blue
Purple='\e[0;35m' # Purple
Cyan='\e[0;36m' # Cyan
White='\e[0;37m' # White
 
# Bold
BBlack='\e[1;30m' # Black
BRed='\e[1;31m' # Red
BGreen='\e[1;32m' # Green
BYellow='\e[1;33m' # Yellow
BBlue='\e[1;34m' # Blue
BPurple='\e[1;35m' # Purple
BCyan='\e[1;36m' # Cyan
BWhite='\e[1;37m' # White
 
# Underline
UBlack='\e[4;30m' # Black
URed='\e[4;31m' # Red
UGreen='\e[4;32m' # Green
UYellow='\e[4;33m' # Yellow
UBlue='\e[4;34m' # Blue
UPurple='\e[4;35m' # Purple
UCyan='\e[4;36m' # Cyan
UWhite='\e[4;37m' # White
 
# Background
On_Black='\e[40m' # Black
On_Red='\e[41m' # Red
On_Green='\e[42m' # Green
On_Yellow='\e[43m' # Yellow
On_Blue='\e[44m' # Blue
On_Purple='\e[45m' # Purple
On_Cyan='\e[46m' # Cyan
On_White='\e[47m' # White
 
# High Intensty
IBlack='\e[0;90m' # Black
IRed='\e[0;91m' # Red
IGreen='\e[0;92m' # Green
IYellow='\e[0;93m' # Yellow
IBlue='\e[0;94m' # Blue
IPurple='\e[0;95m' # Purple
ICyan='\e[0;96m' # Cyan
IWhite='\e[0;97m' # White
 
# Bold High Intensty
BIBlack='\e[1;90m' # Black
BIRed='\e[1;91m' # Red
BIGreen='\e[1;92m' # Green
BIYellow='\e[1;93m' # Yellow
BIBlue='\e[1;94m' # Blue
BIPurple='\e[1;95m' # Purple
BICyan='\e[1;96m' # Cyan
BIWhite='\e[1;97m' # White
 
# High Intensty backgrounds
On_IBlack='\e[0;100m' # Black
On_IRed='\e[0;101m' # Red
On_IGreen='\e[0;102m' # Green
On_IYellow='\e[0;103m' # Yellow
On_IBlue='\e[0;104m' # Blue
On_IPurple='\e[10;95m' # Purple
On_ICyan='\e[0;106m' # Cyan
On_IWhite='\e[0;107m' # White
 
GIT_PS1_SHOWDIRTYSTATE=1
 
#
function parse_git_branch {
 
git rev-parse --git-dir &> /dev/null
git_status="$(git status 2> /dev/null)"
branch_pattern="^# On branch ([^${IFS}]*)"
remote_pattern="# Your branch is (.*) of"
diverge_pattern="# Your branch and (.*) have diverged"
if [[ ! ${git_status}} =~ "working directory clean" ]]; then
state="${BWhite}⚡"
fi
# add an else if or two here if you want to get more specific
if [[ ${git_status} =~ ${remote_pattern} ]]; then
if [[ ${BASH_REMATCH[1]} == "ahead" ]]; then
remote="${BYellow}↑"
else
remote="${BYellow}↓"
fi
fi
if [[ ${git_status} =~ ${diverge_pattern} ]]; then
remote="${BYellow}↕"
fi
if [[ ${git_status} =~ ${branch_pattern} ]]; then
branch=${BASH_REMATCH[1]}
echo "$(__git_ps1) ${remote} ${state}"
fi
}
 
function prompt_func() {
previous_return_value=$?;
prompt="${BBlue}[\t]${BGreen}[\u@\h]${BRed}$(parse_git_branch) ${BBlue}\w \$ ${Color_Off} "
if test $previous_return_value -eq 0
then
PS1="${prompt}➔ "
else
PS1="${prompt}${RED}➔${COLOR_NONE} "
fi
}
 
PROMPT_COMMAND=prompt_func
 
#PS1="${BBlue}[\t]${BGreen}[\u@\h] ${BBlue}\w \$ ${Color_Off}"

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