Class: Nexo::Sandboxes::Virtual

Inherits:
Nexo::Sandbox show all
Defined in:
lib/nexo/sandboxes/virtual.rb

Overview

In-memory sandbox with zero host access — the safe default. Files live in a Hash keyed by normalized absolute path, so nothing the model writes ever touches the host filesystem.

#shell raises NotImplementedError on purpose: in-memory means there is no process to run a command in. That is the safety property, not a gap.

Instance Method Summary collapse

Methods inherited from Nexo::Sandbox

#close, #instructions, #mtime, #supports?

Constructor Details

#initialize(cwd: "/workspace") ⇒ Virtual

Starts an empty in-memory filesystem rooted at cwd (default /workspace).



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# File 'lib/nexo/sandboxes/virtual.rb', line 13

def initialize(cwd: "/workspace")
  @cwd = cwd
  @files = {}
end

Instance Method Details

#glob(pattern) ⇒ Object 



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# File 'lib/nexo/sandboxes/virtual.rb', line 26

def glob(pattern)
  normalized = norm(pattern)
  @files.keys.select { |key| File.fnmatch(normalized, key) }
end

#read(path) ⇒ Object 



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# File 'lib/nexo/sandboxes/virtual.rb', line 18

def read(path)
  @files.fetch(norm(path)) { raise Errno::ENOENT, path }
end

#shell(_command) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/nexo/sandboxes/virtual.rb', line 31

def shell(_command, **)
  raise NotImplementedError, "virtual sandbox has no shell"
end

#write(path, content) ⇒ Object 



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# File 'lib/nexo/sandboxes/virtual.rb', line 22

def write(path, content)
  @files[norm(path)] = content
end