Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

150 lines (129 sloc) 3.591 kb
require "json"
require "tempfile"
module ExecJS
class ExternalRuntime
class Context
def initialize(runtime, source = "")
@runtime = runtime
@source = source
end
def eval(source, options = {})
if /\S/ =~ source
exec("return eval(#{"(#{source})".to_json})")
end
end
def exec(source, options = {})
compile_to_tempfile([@source, source].join("\n")) do |file|
extract_result(@runtime.send(:exec_runtime, file.path))
end
end
def call(identifier, *args)
eval "#{identifier}.apply(this, #{args.to_json})"
end
protected
def compile_to_tempfile(source)
tempfile = Tempfile.open("execjs")
tempfile.write compile(source)
tempfile.close
yield tempfile
ensure
tempfile.close!
end
def compile(source)
@runtime.send(:runner_source).dup.tap do |output|
output.sub!('#{source}') do
source
end
output.sub!('#{json2_source}') do
IO.read(ExecJS.root + "/support/json2.js")
end
end
end
def extract_result(output)
status, value = output.empty? ? [] : JSON.parse(output)
if status == "ok"
value
else
raise ProgramError, value
end
end
end
attr_reader :name
def initialize(options)
@name = options[:name]
@command = options[:command]
@runner_path = options[:runner_path]
@test_args = options[:test_args]
@test_match = options[:test_match]
@conversion = options[:conversion]
@binary = locate_binary
end
def exec(source)
context = Context.new(self)
context.exec(source)
end
def eval(source)
context = Context.new(self)
context.eval(source)
end
def compile(source)
Context.new(self, source)
end
def available?
@binary ? true : false
end
protected
def runner_source
@runner_source ||= IO.read(@runner_path)
end
def exec_runtime(filename)
output = sh("#{@binary} #{filename} 2>&1")
if $?.success?
output
else
raise RuntimeError, output
end
end
def locate_binary
if binary = which(@command)
if @test_args
output = `#{binary} #{@test_args} 2>&1`
binary if output.match(@test_match)
else
binary
end
end
end
def which(command)
Array(command).find do |name|
name = name.split(/\s+/).first
result = if ExecJS.windows?
`#{ExecJS.root}/support/which.bat #{name}`
else
`which #{name} 2>&1`
end
result.strip.split("\n").first
end
end
if "".respond_to?(:force_encoding)
def sh(command)
output, options = nil, {}
options[:internal_encoding] = @conversion[:from] if @conversion
IO.popen(command, options) { |f| output = f.read }
output.force_encoding(@conversion[:to]) if @conversion
output
end
else
require "iconv"
def sh(command)
output = nil
IO.popen(command) { |f| output = f.read }
if @conversion
Iconv.iconv(@conversion[:from], @conversion[:to], output).first
else
output
end
end
end
end
end
Jump to Line
Something went wrong with that request. Please try again.