Class: RubyNext::Commands::Nextify

Inherits:
Base
  • Object
show all
Defined in:
lib/ruby-next/commands/nextify.rb

Defined Under Namespace

Classes: Stats

Instance Attribute Summary collapse

Attributes inherited from Base

#dry_run

Instance Method Summary collapse

Methods inherited from Base

#base_parser, #initialize, #log, run

Constructor Details

This class inherits a constructor from RubyNext::Commands::Base

Instance Attribute Details

#lib_path ⇒ Object (readonly)

Returns the value of attribute lib_path.



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# File 'lib/ruby-next/commands/nextify.rb', line 45

def lib_path
  @lib_path
end

#min_version ⇒ Object (readonly)

Returns the value of attribute min_version.



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# File 'lib/ruby-next/commands/nextify.rb', line 45

def min_version
  @min_version
end

#out_path ⇒ Object (readonly)

Returns the value of attribute out_path.



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# File 'lib/ruby-next/commands/nextify.rb', line 45

def out_path
  @out_path
end

#overwrite ⇒ Object (readonly) Also known as: overwrite?

Returns the value of attribute overwrite.



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# File 'lib/ruby-next/commands/nextify.rb', line 45

def overwrite
  @overwrite
end

#paths ⇒ Object (readonly)

Returns the value of attribute paths.



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# File 'lib/ruby-next/commands/nextify.rb', line 45

def paths
  @paths
end

#single_version ⇒ Object (readonly)

Returns the value of attribute single_version.



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# File 'lib/ruby-next/commands/nextify.rb', line 45

def single_version
  @single_version
end

#specified_rewriters ⇒ Object (readonly)

Returns the value of attribute specified_rewriters.



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# File 'lib/ruby-next/commands/nextify.rb', line 45

def specified_rewriters
  @specified_rewriters
end

#stats ⇒ Object (readonly)

Returns the value of attribute stats.



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# File 'lib/ruby-next/commands/nextify.rb', line 47

def stats
  @stats
end

Instance Method Details

#parse!(args) ⇒ Object 



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# File 'lib/ruby-next/commands/nextify.rb', line 71

def parse!(args)
  print_help = false
  print_rewriters = false
  rewriter_names = []
  custom_rewriters = []
  @single_version = false
  @overwrite = false

  optparser = base_parser do |opts|
    opts.banner = "Usage: ruby-next nextify DIRECTORY_OR_FILE [options]"

    opts.on("-o", "--output=OUTPUT", "Specify output directory or file or stdout") do |val|
      @out_path = val
    end

    opts.on("--min-version=VERSION", "Specify the minimum Ruby version to support") do |val|
      @min_version = Gem::Version.new(val)
    end

    opts.on("--single-version", "Only create one version of a file (for the earliest Ruby version)") do
      @single_version = true
    end

    opts.on("--overwrite", "Overwrite original file") do
      @overwrite = true
    end

    opts.on("--edge", "Enable edge (master) Ruby features") do |val|
      ENV["RUBY_NEXT_EDGE"] = val.to_s
      require "ruby-next/language/rewriters/edge"
    end

    opts.on("--proposed", "Enable proposed/experimental Ruby features") do |val|
      ENV["RUBY_NEXT_PROPOSED"] = val.to_s
      require "ruby-next/language/rewriters/proposed"
    end

    opts.on(
      "--transpile-mode=MODE",
      "Transpiler mode (ast or rewrite). Default: rewrite"
    ) do |val|
      Language.mode = val.to_sym
    end

    opts.on("--[no-]refine", "Do not inject `using RubyNext`") do |val|
      Core.strategy = :core_ext unless val
    end

    opts.on("--list-rewriters", "List available rewriters") do |val|
      print_rewriters = true
    end

    opts.on("--rewrite=REWRITERS...", "Specify particular Ruby features to rewrite") do |val|
      rewriter_names << val
    end

    opts.on("--import-rewriter=REWRITERS...", "Specify paths to load custom rewritiers") do |val|
      custom_rewriters << val
    end

    opts.on("-h", "--help", "Print help") do
      print_help = true
    end
  end

  optparser.parse!(args)

  @lib_path = args[0]

  if print_help
    $stdout.puts optparser.help
    exit 0
  end

  # Load custom rewriters
  custom_rewriters.each do |path|
    Kernel.load path
  end

  if print_rewriters
    Language.rewriters.each do |rewriter|
      $stdout.puts "#{rewriter::NAME} (\"#{rewriter::SYNTAX_PROBE}\")#{rewriter.unsupported_syntax? ? " (unsupported)" : ""}"
    end
    exit 0
  end

  unless lib_path&.then(&File.method(:exist?))
    $stdout.puts "Path not found: #{lib_path}"
    $stdout.puts optparser.help
    exit 2
  end

  if rewriter_names.any? && min_version
    $stdout.puts "--rewrite cannot be used with --min-version simultaneously"
    exit 2
  end

  @specified_rewriters =
    if rewriter_names.any?
      begin
        Language.select_rewriters(*rewriter_names)
      rescue Language::RewriterNotFoundError => error
        $stdout.puts error.message
        $stdout.puts "Try --list-rewriters to see list of available rewriters"
        exit 2
      end
    end

  if overwrite? && !single_version?
    $stdout.puts "--overwrite only works with --single-version or explcit rewritires specified (via --rewrite)"
    exit 2
  end

  @paths =
    if File.directory?(lib_path)
      Dir[File.join(lib_path, "**/*.rb")]
    elsif File.file?(lib_path)
      [lib_path].tap do |_|
        @lib_path = File.dirname(lib_path)
      end
    end
end

#run ⇒ Object 



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# File 'lib/ruby-next/commands/nextify.rb', line 49

def run
  @stats = Stats.new

  log "RubyNext core strategy: #{RubyNext::Core.strategy}"
  log "RubyNext transpile mode: #{RubyNext::Language.mode}"

  remove_rbnext!

  @min_version ||= MIN_SUPPORTED_VERSION

  paths.each do |path|
    stats.file!

    contents = File.read(path)
    transpile path, contents
  end

  ensure_rbnext!

  log stats.report
end