module Rake::Funnel::Extensions::CommonPath
Public Instance Methods
common_path()
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# File lib/rake/funnel/extensions/common_path.rb, line 10 def common_path list = to_a .compact .map { |x| components(x) } min = list.min_by(&:length) matches = find_matches(list, min) matches.min_by(&:length) || '' end
Private Instance Methods
components(path)
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# File lib/rake/funnel/extensions/common_path.rb, line 23 def components(path) paths = [] Pathname.new(path).descend do |p| paths << p end paths = paths.inject([]) do |components, p| relative = p.relative_path_from(components.last[:absolute]) if components.any? components << { absolute: p, relative: relative || p } end paths.map { |component| component[:relative].to_s } end
find_matches(list, min)
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# File lib/rake/funnel/extensions/common_path.rb, line 38 def find_matches(list, min) list.map do |path| longest_prefix = [] path.zip(min).each do |left, right| next if left != right longest_prefix << right end File.join(longest_prefix) end end