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Contents
# frozen_string_literal: true
module Hanami
module Utils
# Shell helper for colorizing STDOUT
#
# It doesn't check if you're writing to a file or anything, so you have to
# check that yourself before using this module.
#
# @since 1.2.0
module ShellColor
# Unknown color code error
#
# @since 1.2.0
class UnknownColorCodeError < ::StandardError
def initialize(code)
super("unknown color code: `#{code.inspect}'")
end
end
# Escape codes for terminals to output strings in colors
#
# @since 1.2.0
# @api private
COLORS = ::Hash[
black: 30,
red: 31,
green: 32,
yellow: 33,
blue: 34,
magenta: 35,
cyan: 36,
gray: 37,
].freeze
# Colorize output
# 8 colors available: black, red, green, yellow, blue, magenta, cyan, and gray
#
# @param input [#to_s] the string to colorize
# @param color [Symbol] the color
#
# @raise [Hanami::Utils::ShellColor::UnknownColorError] if the color code is
# unknown
#
# @return [String] the colorized string
#
# @since 1.2.0
def self.call(input, color:)
"\e[#{color_code(color)}m#{input}\e[0m"
end
# Helper method to translate between color names and terminal escape codes
#
# @api private
# @since 1.2.0
#
# @raise [Hanami::Utils::ShellColor::UnknownColorError] if the color code is
# unknown
def self.color_code(code)
COLORS.fetch(code) { raise UnknownColorCodeError.new(code) }
end
end
end
end
Version data entries
11 entries across 11 versions & 1 rubygems