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require "shellwords"
class Compiler < ApplicationRecord
def to_s
"#{language} #{version}"
end
def run_lazy(snippet)
r = Result.prepare_execution(self, snippet)
ExecuteJob.perform_later(self, snippet, r)
r
end
def run(snippet)
r = Result.prepare_execution(self, snippet)
run_body(snippet, r)
r
end
private
def run_body(snippet, r)
baseroot = Rails.root.join("playground/base").to_s
env_overlay = Rails.root.join("playground").join(language).join(version).to_s
sf = Tempfile.open
sf.write(snippet.code)
sf.fsync
of = Tempfile.open
ef = Tempfile.open
pid = spawn(Rails.root.join("sandbox/safe_runner").to_s, baseroot, env_overlay, sf.path, *Shellwords.split(command_line),
in: :close, # TODO
out: of,
err: ef)
_, pst = Process.waitpid2(pid)
ef.rewind
err = ef.read.force_encoding(Encoding::BINARY)
if pst.signaled? || pst.exitstatus > 0
result = :errored
status = -1
Logger.error(err)
err = nil
else
rx, status = err.slice!(0, 8).unpack("ii")
result = rx == 0 ? :success : :failed
end
of.rewind
output = of.read(65535)
r.update!(output: output,
truncated: !of.eof?,
status: status,
result: result,
error: err)
rescue => e
r.update!(status: -1, result: :errored)
raise e
ensure
sf.close if sf
of.close if of
end
end
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