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import.rb
60 lines (46 loc) · 1.21 KB
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import.rb
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require 'pathname'
# @param [String] path Base path
# @param [String] fname file name
# @return [String|nil]
exist_file = -> (path, fname = nil) {
pn = Pathname.new(path)
pn = pn.join(fname) if fname
full_path = pn.to_s
return full_path if FileTest.file?(full_path)
rb ="#{full_path}.rb"
return rb if FileTest.file?(rb)
return nil
}
# @param [String] feature
# @return [String|nil]
find_file = -> (feature) {
# absolute path
if feature[0] == '/'
full_path = exist_file.(feature)
return full_path if full_path
end
# relative path
if feature.start_with?('./') || feature.start_with?('../')
base = caller_locations[2].absolute_path
full_path = exist_file.(File.expand_path("../#{feature}", base))
return full_path if full_path
end
$LOAD_PATH.each do |path|
full_path = exist_file.(path, feature)
return full_path if full_path
end
return nil
}
# @param [String] path
# @return [Module]
evaluate = -> (path) {
script = File.read(path)
res = Module.new
res.module_eval(script, path)
return res
}
define_method(:import, -> (feature) {
path = find_file.(feature)
raise LoadError, "cannot load such file -- #{feature}" unless path
return evaluate.(path)
})