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# Used to track formulae that cannot be installed at the same time
FormulaConflict = Struct.new(:name, :reason)
# Used to annotate formulae that duplicate OS X provided software
# or cause conflicts when linked in.
class KegOnlyReason
attr_reader :reason, :explanation
def initialize reason, explanation=nil
@reason = reason
@explanation = explanation
end
def valid?
case @reason
when :provided_pre_mountain_lion
MacOS.version < :mountain_lion
when :provided_until_xcode43
MacOS::Xcode.version < "4.3"
when :provided_until_xcode5
MacOS::Xcode.version < "5.0"
else
true
end
end
def to_s
case @reason
when :provided_by_osx then <<-EOS.undent
Mac OS X already provides this software and installing another version in
parallel can cause all kinds of trouble.
#{@explanation}
EOS
when :provided_pre_mountain_lion then <<-EOS.undent
Mac OS X already provides this software in versions before Mountain Lion.
#{@explanation}
EOS
when :provided_until_xcode43
"Xcode provides this software prior to version 4.3.\n\n#{explanation}"
when :provided_until_xcode5
"Xcode provides this software prior to version 5.\n\n#{explanation}"
else
@reason
end.strip
end
end
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