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c13311ca09
MacOS.version#<=> is called many, many times during formula loading with the same half dozen or so arguments. A typical call to this method involves: * a hash lookup to convert a symbol argument to a string * creation of a throw-away Version object wrapping the argument * the actual version comparison, which is not cheap This makes it a prime candidate to be memoized.
49 lines
1.0 KiB
Ruby
49 lines
1.0 KiB
Ruby
require 'version'
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module OS
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module Mac
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class Version < ::Version
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SYMBOLS = {
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:mavericks => '10.9',
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:mountain_lion => '10.8',
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:lion => '10.7',
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:snow_leopard => '10.6',
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:leopard => '10.5',
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:tiger => '10.4',
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}
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def self.from_symbol(sym)
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new(SYMBOLS.fetch(sym))
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end
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def initialize(*args)
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super
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@comparison_cache = {}
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end
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def <=>(other)
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@comparison_cache.fetch(other) do
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v = SYMBOLS.fetch(other, other.to_s)
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@comparison_cache[other] = super(Version.new(v))
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end
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end
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def to_sym
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case @version
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when '10.9' then :mavericks
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when '10.8' then :mountain_lion
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when '10.7' then :lion
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when '10.6' then :snow_leopard
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when '10.5' then :leopard
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when '10.4' then :tiger
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else :dunno
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end
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end
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def pretty_name
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to_sym.to_s.split('_').map(&:capitalize).join(' ')
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end
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end
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end
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end
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