Class: Bwrap::Config::Features::Ruby

Inherits:
Base
  • Object
show all
Includes:
Execution
Defined in:
lib/bwrap/config/features/ruby.rb

Overview

Defines Ruby feature set.

Implies Nscd feature.

Instance Method Summary collapse

Methods included from Execution

do_execute, last_status, popen2e

Methods included from Output

debug?, debug_output, error_output, handle_output_options, info_output, quiet?, trace?, trace_output, verb_output, verbose?, warn_output

Methods inherited from Base

#disable, #enabled?

Constructor Details

#initialize(features) ⇒ Ruby

Returns a new instance of Ruby.



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# File 'lib/bwrap/config/features/ruby.rb', line 11

def initialize features
  super features

  @gem_env_paths = true
  @stdlib = []
end

Instance Method Details

#enable ⇒ Object

Note:

This does not allow development headers needed for compilation for now. I’ll look at it after I have an use for it.

Note:

Also enables Nscd feature.

Enable Ruby feature set.

Among others, binds ‘RbConfig::CONFIG` so scripts works.



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# File 'lib/bwrap/config/features/ruby.rb', line 31

def enable
  super

  @features.nscd.enable
end

#gem_env_paths? ⇒ Boolean

Returns true if bindirs from “gem environment” should be added to sandbox.

Returns:

  • (Boolean) —

    true if bindirs from “gem environment” should be added to sandbox.



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# File 'lib/bwrap/config/features/ruby.rb', line 19

def gem_env_paths?
  @gem_env_paths
end

#interpreter ⇒ Pathname|nil

Returns path to Ruby interpreter.

Returns:

  • (Pathname|nil) —

    path to Ruby interpreter.



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# File 'lib/bwrap/config/features/ruby.rb', line 38

def interpreter
  @features.mime&.executable_path
end

#ruby_config ⇒ Hash(String, String)

Returns RbConfig::CONFIG from interpreter returned by #interpreter.

Returns:

  • (Hash(String, String)) —

    RbConfig::CONFIG from interpreter returned by #interpreter



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# File 'lib/bwrap/config/features/ruby.rb', line 43

def ruby_config
  unless interpreter
    raise "Interpreter is not set, so ruby_config() can’t be called yet."
  end

  return @ruby_config if @ruby_config

  script = %q{RbConfig::CONFIG.each { |k, v| puts "#{k}=#{v}" }}
  config_string = execvalue %W{ #{interpreter} -e #{script} }

  ruby_config = {}
  config_string.split("\n").each do |line|
    key, value = line.split "=", 2
    ruby_config[key] = value
  end

  @ruby_config = ruby_config
end

#stdlib ⇒ Array

Note:

Existence of library paths are checked here, and not in #stdlib=, to avoid error about missing interpreter, as it is set in Bwrap#run, and config is meant to be created beforehand.

Note:

This is only required to be called if extra dependencies are necessary. For example, psych.so requires libyaml.so.

Extra libraries to be loaded from script’s interpreter’s ‘RbConfig::CONFIG`.

Returns:

  • (Array) —

    list of needed libraries.



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# File 'lib/bwrap/config/features/ruby.rb', line 72

def stdlib
  # Just a little check to have error earlier.
  @stdlib.each do |lib|
    unless File.exist? "#{ruby_config["rubyarchdir"]}/#{lib}.so"
      raise "Library “#{lib}” passed to Bwrap::Config::Ruby.stdlib= does not exist."
    end
  end

  @stdlib
end

#stdlib=(libs) ⇒ Object 



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# File 'lib/bwrap/config/features/ruby.rb', line 83

def stdlib= libs
  @stdlib = libs
end