On Fri, Nov 10, 2017 at 10:15 PM, Steven Haigh <[log in to unmask]> wrote:
>
> For what its worth, I've been using this for years:
> PS1="\[\033[01;37m\]\$? \$(if [[ \$? == 0 ]]; then echo \"\[\033[01;32m\]
> \342\234\223\"; else echo \"\[\033[01;31m\]\342\234\227\"; fi) $(if [[ ${EUID}
> == 0 ]]; then echo '\[\033[01;31m\]\h'; else echo '\[\033[01;32m\]\u@\h'; fi)\
> [\033[01;34m\] \w \$\[\033[00m\] "

If you use single-quotes for PS1, you can use unescaped double-quotes
and dollar signs within it. It makes it more legible:

PS1='\[\033[01;37m\]$? $(if [[ $? == 0 ]]; then echo
"\[\033[01;32m\]\342\234\223"; else echo
"\[\033[01;31m\]\342\234\227"; fi) $(if [[ ${EUID} == 0 ]]; then echo
"\[\033[01;31m\]\h"; else echo "\[\033[01;32m\]\u@\h";
fi)\[\033[01;34m\] \w \$\[\033[00m\] '

You might be better off using "printf" (it's a bash builtin) because
"echo" might not interpret escapes depending on the bash or shell
options that are set.