Class: RailsMcp::Executor

Inherits:
Object
  • Object
show all
Defined in:
lib/rails_mcp/executor.rb

Class Method Summary collapse

Class Method Details

.eval(code) ⇒ Object

Evaluates Ruby code and captures stdout/stderr.

Raises:

  • (ArgumentError) 


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# File 'lib/rails_mcp/executor.rb', line 7

def self.eval(code)
  code = code.to_s
  raise ArgumentError, "code can't be blank" if code.strip.empty?

  out, err = StringIO.new, StringIO.new
  old_out, old_err = $stdout, $stderr
  result = nil
  error = nil

  begin
    $stdout, $stderr = out, err
    result = TOPLEVEL_BINDING.eval(code)
  rescue SyntaxError, StandardError => e
    error = e
  ensure
    $stdout, $stderr = old_out, old_err
  end

  if error
    backtrace = error.backtrace&.first(3)&.join("\n  ")
    return "#{error.class}: #{error.message}\n#{backtrace ? "  #{backtrace}\n" : ""}"
  end

  parts = []
  parts << "=> #{result.inspect}\n" unless result.nil?
  parts << out.string unless out.string.empty?
  parts << err.string unless err.string.empty?
  parts.join
end