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require 'rbconfig'
module FSSM::Support
class << self
def usable_backend
case
when mac? && rb_fsevent?
'RBFSEvent'
when linux? && rb_inotify?
'Inotify'
else
'Polling'
end
end
def optimal_backend_dependency
return case
when mac? then ['rb-fsevent', '>= 0.4.3.1']
when linux? then ['rb-inotify', '>= 0.8.8']
else [nil, nil]
end
end
def backend
@@backend ||= usable_backend
end
def jruby?
defined?(JRUBY_VERSION)
end
def mac?
RbConfig::CONFIG['target_os'] =~ /darwin/i
end
def lion?
RbConfig::CONFIG['target_os'] =~ /darwin11/i
end
def linux?
RbConfig::CONFIG['target_os'] =~ /linux/i
end
def rb_fsevent?
begin
require 'rb-fsevent'
defined?(FSEvent::VERSION) ? FSEvent::VERSION.to_f >= 0.4 : false
rescue LoadError
false
end
end
def rb_inotify?
begin
require 'rb-inotify'
if defined?(INotify::VERSION)
version = INotify::VERSION
version[0] > 0 || version[1] >= 6
end
rescue LoadError
false
end
end
def use_block(context, block)
return if block.nil?
if block.arity == 1
block.call(context)
else
context.instance_eval(&block)
end
end
end
end
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