Class: RubyWasm::Packager::FileSystem

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby_wasm/packager/file_system.rb

Overview

Package Ruby code into a mountable directory.

Instance Method Summary collapse

Constructor Details

#initialize(dest_dir, packager) ⇒ FileSystem

Returns a new instance of FileSystem.



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# File 'lib/ruby_wasm/packager/file_system.rb', line 3

def initialize(dest_dir, packager)
  @dest_dir = dest_dir
  @packager = packager
  @ruby_root = File.join(@dest_dir, "usr", "local")
end

Instance Method Details

#bundle_dir ⇒ Object 



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# File 'lib/ruby_wasm/packager/file_system.rb', line 105

def bundle_dir
  File.join(@dest_dir, bundle_relative_path)
end

#package_gems ⇒ Object 



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# File 'lib/ruby_wasm/packager/file_system.rb', line 58

def package_gems
  @packager.specs.each do |spec|
    RubyWasm.logger.info "Packaging gem: #{spec.full_name}"
  end
  self.each_gem_content_path do |relative, source|
    RubyWasm.logger.debug "Packaging gem file: #{relative}"
    dest = File.join(@dest_dir, relative)
    FileUtils.mkdir_p File.dirname(dest)
    FileUtils.cp_r source, dest
  end

  setup_rb_path = File.join(bundle_relative_path, "setup.rb")
  RubyWasm.logger.info "Packaging setup.rb: #{setup_rb_path}"
  full_setup_rb_path = File.join(@dest_dir, setup_rb_path)
  FileUtils.mkdir_p File.dirname(full_setup_rb_path)
  File.write(full_setup_rb_path, setup_rb_content)
end

#package_ruby_root(tarball, executor) ⇒ Object 



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# File 'lib/ruby_wasm/packager/file_system.rb', line 9

def package_ruby_root(tarball, executor)
  usr_dir = File.dirname(@ruby_root)
  executor.mkdir_p usr_dir
  executor.system(
    "tar",
    "-C",
    usr_dir,
    "-xzf",
    tarball,
    "--strip-components=2"
  )
end

#remove_non_runtime_files(executor) ⇒ Object 



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# File 'lib/ruby_wasm/packager/file_system.rb', line 84

def remove_non_runtime_files(executor)
  patterns = %w[
    usr/local/lib/libruby-static.a
    usr/local/bin/ruby
    usr/local/include
  ]

  patterns << "**/*.so" unless @packager.features.support_dynamic_linking?
  patterns.each do |pattern|
    Dir
      .glob(File.join(@dest_dir, pattern))
      .each do |entry|
        RubyWasm.logger.debug do
          relative_entry = Pathname.new(entry).relative_path_from(@dest_dir)
          "Removing non-runtime file: #{relative_entry}"
        end
        executor.rm_rf entry
      end
  end
end

#remove_stdlib(executor) ⇒ Object 



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# File 'lib/ruby_wasm/packager/file_system.rb', line 22

def remove_stdlib(executor)
  # Include only rbconfig.rb
  rbconfig =
    File.join(
      @ruby_root,
      "lib",
      "ruby",
      ruby_version,
      "wasm32-wasi",
      "rbconfig.rb"
    )
  # Remove all files except rbconfig.rb
  RubyWasm.logger.info "Removing stdlib (except rbconfig.rb: #{rbconfig})"
  rbconfig_contents = File.read(rbconfig)
  executor.rm_rf @ruby_root
  executor.mkdir_p File.dirname(rbconfig)
  File.write(rbconfig, rbconfig_contents)
end

#remove_stdlib_component(executor, component) ⇒ Object 



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# File 'lib/ruby_wasm/packager/file_system.rb', line 41

def remove_stdlib_component(executor, component)
  RubyWasm.logger.info "Removing stdlib component: #{component}"
  case component
  when "enc"
    # Remove all encodings except for encdb.so and transdb.so
    enc_dir = File.join(@ruby_root, "lib", "ruby", ruby_version, "wasm32-wasi", "enc")
    puts File.join(enc_dir, "**/*.so")
    Dir.glob(File.join(enc_dir, "**/*.so")).each do |entry|
      next if entry.end_with?("encdb.so", "transdb.so")
      RubyWasm.logger.debug "Removing stdlib encoding: #{entry}"
      executor.rm_rf entry
    end
  else
    raise "Unknown stdlib component: #{component}"
  end
end

#ruby_root ⇒ Object 



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# File 'lib/ruby_wasm/packager/file_system.rb', line 109

def ruby_root
  @ruby_root
end

#setup_rb_content ⇒ Object 



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# File 'lib/ruby_wasm/packager/file_system.rb', line 76

def setup_rb_content
  content = ""
  self.each_gem_require_path do |relative, _|
    content << %Q[$:.unshift File.expand_path("#{File.join("/", relative)}")\n]
  end
  content
end