Class: Ask::Tools::Code

Inherits:
Ask::Tool
  • Object
show all
Defined in:
lib/ask/tools/shell/code.rb

Overview

Write and execute Ruby code in a subprocess. Runs in a temp directory via ruby -e.

Constant Summary collapse

MAX_OUTPUT_SIZE = 
102_400

Instance Method Summary collapse

Instance Method Details

#execute(code:) ⇒ Object 



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# File 'lib/ask/tools/shell/code.rb', line 19

def execute(code:)
  Dir.mktmpdir("ask_code") do |_dir|
    stdout = StringIO.new
    stderr = StringIO.new
    exit_code = -1

    begin
      Open3.popen3("ruby", "-e", code, chdir: Dir.pwd) do |stdin, out, err, wait_thr|
        stdin.close

        threads = [
          Thread.new { IO.copy_stream(out, stdout) rescue nil },
          Thread.new { IO.copy_stream(err, stderr) rescue nil }
        ]

        threads.each(&:join)
        exit_code = wait_thr.value.exitstatus
      end
    rescue => e
      return Ask::Result.error(message: "Code execution failed: #{e.message}",
                               metadata: { stdout: stdout.string, stderr: stderr.string })
    end

    out_text = stdout.string
    err_text = stderr.string

    if out_text.length > MAX_OUTPUT_SIZE
      header = "[Output truncated to #{MAX_OUTPUT_SIZE / 1024}KB]\n"
      out_text = "#{header}#{out_text[-(MAX_OUTPUT_SIZE - header.length)..]}"
    end

    Ask::Result.ok(data: {
      stdout: out_text,
      stderr: err_text,
      exit_code: exit_code
    })
  end
end