Bash Prompt Themes 🌈

Bash prompt themes, with a color gradient feature.

How to use

Themes are a combination of a template and a color palette. The template is the prompt itself and the colors from the palette are applied onto it.

Theme names are a combinasion of their template and palette: template_palette like teal_horizon.

Demo the themes

Demo all the themes using:

./demo_themes

Use a theme

To use a theme simply source it to your current shell:

source ./themes/teal_horizon

Persistent use

Clone the repo on your machine because themes aren't fully standalone, they use the lib/lib file from this repo.

Source the theme in your .bashrc. For instance, at the end of your .bashrc, add:

# Change the path with where you put bash-ps1-themes
source ~/bash-ps1-themes/themes/teal_cyber_3

How it works

The themes work with the PROMPT_COMMAND and PS1 environment variable.

The PROMPT_COMMAND invokes a function that in turn invokes other functions to build a PS1 variable.

Development

You can create your own templates and color palettes.

Palette development

Creating a palette

Create a new file in the palettes/ folder and update the following variables to your liking:

#!/bin/bash
palette_primary="#1bcfc6"
palette_primary_dark="#02a199"
palette_secondary="#008cff"
palette_secondary_dark="#0066ba"
palette_accent="#b88914"
palette_accent_dark="#9c7f0c"
palette_gradient_start="#0bb092"
palette_gradient_end="#008cff"
palette_variant_1="#00d7af"
palette_variant_2="#00d7d7"
palette_variant_3="#00d7ff"

Viewing a palette

To preview the palette in the terminal, use:

./demo_palettes

./demo_palettes --detailed

Template development

Creating a template

Create a new file in the templates/ folder.

This snippet is an example of a basic template:

#!/bin/bash
scriptDir=$(dirname -- "$(readlink -f -- "$BASH_SOURCE")")
source $scriptDir'/../lib/lib'

prompt_cmd() {
  LINE_1="$(rgb_fg_ps1 $palette_primary)$(current_user) $(rgb_fg_ps1 $palette_secondary)$(basename $PWD)"
  LINE_2="$(rgb_fg_ps1 $palette_accent)$ $(no_color_ps1)"

  PS1="\r\n${LINE_1}\r\n${LINE_2}"
}

export PROMPT_COMMAND='prompt_cmd'

Lib API

Here are some functions you can use in your templates:

# Set the foreground color, all text set after calling this function will be the desired color
rgb_fg_ps1 "#ffffff" 

# Set the background color, all text set after calling this function will be the desired color
rgb_bg_ps1 "#ffffff" 

# Create a foreground gradient over a defined string
fg_gradient_ps1 "#ff0000" "#00ff00" "some string to receive gradient"

# Create a background gradient over a defined string
bg_gradient_ps1 "#ff0000" "#00ff00" "some string to receive gradient"

# Current git branch
gitbranch

See the lib/ source for more functions.

Generating the themes from your new palette/template

Then, to apply the palette to the templates, there is a generate_themes script that combines all sets of templates and palettes together:

./generate_themes

Your theme will be generated in the themes/ folder.

Notice

Works only in Bash shells.