class ExecJS::ExternalRuntime
Attributes
name[R]
Public Class Methods
new(options)
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# File lib/execjs/external_runtime.rb, line 71 def initialize(options) @name = options[:name] @command = options[:command] @runner_path = options[:runner_path] @encoding = options[:encoding] @deprecated = !!options[:deprecated] @binary = nil @popen_options = {} @popen_options[:external_encoding] = @encoding if @encoding @popen_options[:internal_encoding] = ::Encoding.default_internal || 'UTF-8' if @runner_path instance_eval generate_compile_method(@runner_path) end end
Public Instance Methods
available?()
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# File lib/execjs/external_runtime.rb, line 88 def available? require 'json' binary ? true : false end
deprecated?()
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# File lib/execjs/external_runtime.rb, line 93 def deprecated? @deprecated end
exec_runtime(filename)
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# File lib/execjs/external_runtime.rb, line 144 def exec_runtime(filename) io = IO.popen(binary.split(' ') + [filename, {err: [:child, :out]}], @popen_options) output = io.read io.close if $?.success? output else raise RuntimeError, output end end
Protected Instance Methods
encode_source(source)
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# File lib/execjs/external_runtime.rb, line 133 def encode_source(source) encoded_source = encode_unicode_codepoints(source) ::JSON.generate("(function(){ #{encoded_source} })()", quirks_mode: true) end
encode_unicode_codepoints(str)
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# File lib/execjs/external_runtime.rb, line 138 def encode_unicode_codepoints(str) str.gsub(/[\u0080-\uffff]/) do |ch| "\\u%04x" % ch.codepoints.to_a end end
generate_compile_method(path)
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# File lib/execjs/external_runtime.rb, line 119 def generate_compile_method(path) <<-RUBY def compile_source(source) <<-RUNNER #{IO.read(path)} RUNNER end RUBY end
json2_source()
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# File lib/execjs/external_runtime.rb, line 129 def json2_source @json2_source ||= IO.read(ExecJS.root + "/support/json2.js") end
which(command)
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Internally exposed for Context.
# File lib/execjs/external_runtime.rb, line 158 def which(command) Array(command).find do |name| name, args = name.split(/\s+/, 2) path = locate_executable(name) next unless path args ? "#{path} #{args}" : path end end
Private Instance Methods
binary()
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# File lib/execjs/external_runtime.rb, line 98 def binary @binary ||= which(@command) end
locate_executable(cmd)
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# File lib/execjs/external_runtime.rb, line 102 def locate_executable(cmd) if ExecJS.windows? && File.extname(cmd) == "" cmd << ".exe" end if File.executable? cmd cmd else path = ENV['PATH'].split(File::PATH_SEPARATOR).find { |p| full_path = File.join(p, cmd) File.executable?(full_path) && File.file?(full_path) } path && File.expand_path(cmd, path) end end