Module: Coat::Palette

Defined in:

lib/coat/palette.rb

Overview

Assigns each source a color from the quilt palette, derived from its name. The same agent gets the same patch color in every build, on every machine, so color carries provenance without a legend lookup.

Constant Summary

COLORS =

%w[brick gold forest denim plum rust teal clay].freeze

Class Method Summary

• .for(name) ⇒ Object
• .legend(names) ⇒ Object

  The distinct colors in play, in the order their sources first appear, so the header strip reads as the document's own palette.

Class Method Details

.for(name) ⇒ Object

# File 'lib/coat/palette.rb', line 12

def self.for(name)
  COLORS[Digest::SHA256.hexdigest(name.to_s).to_i(16) % COLORS.size]
end

.legend(names) ⇒ Object

The distinct colors in play, in the order their sources first appear, so the header strip reads as the document's own palette.

# File 'lib/coat/palette.rb', line 18

def self.legend(names)
  names.uniq.map { |name| [name, self.for(name)] }
end