color.sh's Introduction

`color.sh` - Test terminal colors with POSIX shells

Original by Daniel Crisman.

Generated using `agg`, colors by `kanagawa.nvim`.

Getting Started

Prerequisites

A POSIX.1-2017 compliant shell, or any of the ones listed in Supported shells.

Installation

Paste in a macOS Terminal or Linux shell prompt:

/bin/sh -c "$(curl -fsSL https://github.com/Neved4/color.sh/tree/master/install.sh"

Usage

color.sh [bg | fg | table]

Portability

Supported shells

Shell	Version	Supported
`bash`	`5.2.15`	Yes
`dash`	`0.5.12`	Yes
`ksh93`	`93u+m/1.0.7`	Yes
`mksh`	`59c`	Yes
`oksh`	`7.3`	Yes
`osh`	`0.18.0`	Yes
`posh`	`0.14.1`	Yes¹
`yash`	`2.55`	Yes
`zsh`	`5.9`	Yes
`elvish`	`0.19.2`	No
`etsh`	`5.4.0`	No
`fish`	`3.6.1`	No
`tcsh`	`6.21.00`	No
`nsh`	`0.4.2`	No
`nu`	`0.85.05`	No
`ysh`	`0.18.0`	No
`xonsh`	`0.14.1`	No

Benchmarks

Note that while scolor.sh provides a more elegant implementation, color.sh more effectively demonstrates the performance of every shell. See Benchmarks.²

Standards

This script conforms to ISO 9945:2009, also known as POSIX.1-2017.³

License

This repository is licensed under the terms of the MIT License.

See the LICENSE file for details.

Acknowledgments

Special thanks to @mirabilos for the many suggestions, corrections and feedback.

To accomodate posh, parameter substitution had to be used. See: What does ${1+"$@"} mean | Sven Mascheck. ↩
Note that pdksh derived shells, such as mksh, oksh or poskh, have a higher fork-exec penalty when using /usr/bin/printf, compared to the Korn shell built-in print. Targeted code was introduced to precisely assess performance. ↩
IEEE Std 1003.1-2017: Standard for Information Technology — Portable Operating System Interface (POSIX®), ISO/IEC/IEEE 9945:2009/COR 2:2017. URL: https://pubs.opengroup.org/onlinepubs/9699919799/ ↩

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