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Bashrc.wiki: Updated notes regarding prompt, and removed code

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David Thurstenson 2021-06-05 18:13:54 -05:00
parent 615200446f
commit 257765cc22
1 changed files with 2 additions and 32 deletions
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@ -72,39 +72,9 @@ https://git.thurstylark.com/vcsh/bashrc.git/tree/.bashrc.d/12-prompt.bash
I originally built my prompt using http://bashrcgenerator.com and, while it's a nice tool for visually building a prompt, it has several limitations on what you're able to create with it. But more importantly to me, it generates a rediculously long string, defines and resets color for every single character, uses both a color and bold escape sequence to use light/bright colors, mixes raw escape sequences and subshells running tput, and as a result is utterly unreadable and unmaintainable.
So, I replaced it:
So, I replaced it with my own setup that generates the needed color codes on the fly to improve readability. I intentionally put everything in a function and call it immediately so I may use local vars for the color definitions. I didn't really want to leave them around just in case.
{{{class="prettyprint"
promptsetup() {
# Color definitions for prompt
local fg_brightred='\[$(tput setaf 9)\]'
local fg_blue='\[$(tput setaf 4)\]'
local fg_magenta='\[$(tput setaf 13)\]'
local fg_cyan='\[$(tput setaf 6)\]'
local fg_brightcyan='\[$(tput setaf 14)\]'
local fg_green='\[$(tput setaf 2)\]'
local reset='\[$(tput sgr0)\]'
local hostname='\h'
local mixin
# [hh:mm][username@hostname pwd]$
# Remotely, hostname is red.
[ -n "$SSH_CLIENT" ] && hostname="${fg_brightred}\h${reset}"
# If in a python venv, add venv name in green.
[ -n "$VIRTUAL_ENV" ] && mixin=" ${fg_green}$(basename "$VIRTUAL_ENV")${reset}"
# If in a vcsh repo env, add repo name in magenta.
[ -n "$VCSH_REPO_NAME" ] && mixin=" ${fg_magenta}$VCSH_REPO_NAME${reset}"
PS1="${fg_blue}[\A]${fg_cyan}[${fg_brightcyan}\u${fg_cyan}@${hostname}${mixin} ${fg_cyan}\W]${reset}\$ "
}
promptsetup
}}}
I intentionally put everything in a function and call it immediately so I may use local vars for the color definitions. I didn't really want to leave them around just in case.
I'm not completely happy with this solution because it causes each of the tput subshells to execute each time the prompt is printed. I would like to change this to quash the extra output this causes when using `bash -x`, but I would also like to find a solution that minimizes so many subshells just for a prompt, but avoid hard-coding colors so it can be general enough to support any env in which it may be used.
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