75 lines
1.2 KiB
Ruby
75 lines
1.2 KiB
Ruby
class PATH
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include Enumerable
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extend Forwardable
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def_delegator :@paths, :each
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def initialize(*paths)
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@paths = parse(*paths)
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end
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def prepend(*paths)
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@paths = parse(*paths, *@paths)
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self
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end
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def append(*paths)
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@paths = parse(*@paths, *paths)
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self
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end
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def insert(index, *paths)
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@paths = parse(*@paths.insert(index, *paths))
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self
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end
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def select(&block)
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self.class.new(@paths.select(&block))
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end
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def reject(&block)
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self.class.new(@paths.reject(&block))
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end
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def to_ary
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@paths.dup.to_ary
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end
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alias to_a to_ary
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def to_str
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@paths.join(File::PATH_SEPARATOR)
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end
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alias to_s to_str
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def ==(other)
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if other.respond_to?(:to_ary)
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return true if to_ary == other.to_ary
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end
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if other.respond_to?(:to_str)
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return true if to_str == other.to_str
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end
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false
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end
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def empty?
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@paths.empty?
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end
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def existing
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existing_path = select(&File.method(:directory?))
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# return nil instead of empty PATH, to unset environment variables
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existing_path unless existing_path.empty?
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end
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private
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def parse(*paths)
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paths.flatten
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.compact
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.flat_map { |p| Pathname.new(p).to_path.split(File::PATH_SEPARATOR) }
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.uniq
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end
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end
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