Class: Linecook::Commands::Compile

Inherits:
Linecook::Command show all
Defined in:
lib/linecook/commands/compile.rb

Overview

::desc compile recipes

Compiles a list of recipes into a single package and exports the result to the working directory. The recipes are added to the package at their relative path, minus their extname.

For example:

$ echo "write 'echo hello world'" > recipe.rb 
$ linecook compile recipe.rb
$ sh recipe
hello world

Providing ‘-’ as a recipe will cause stdin to be compiled as a recipe to stdout.

Direct Known Subclasses

Build

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Linecook::Command

#call, help, #initialize, signature

Constructor Details

This class inherits a constructor from Linecook::Command

Class Method Details

.cookbook_gem_paths(latest = true) ⇒ Object 



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# File 'lib/linecook/commands/compile.rb', line 66

def cookbook_gem_paths(latest=true)
  Cookbook.gemspecs(latest).collect do |gemspec|
    gemspec.full_gem_path
  end
end

.gemspecs(latest = true) ⇒ Object 



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# File 'lib/linecook/commands/compile.rb', line 72

def gemspecs(latest=true)
  return [] unless Object.const_defined?(:Gem)

  index = Gem.source_index
  specs = latest ? index.latest_specs : index.gems.values

  specs.select do |spec|
    cookbook_file = File.expand_path(default_file_name, spec.full_gem_path)
    File.exists?(cookbook_file)
  end
end

.parse(argv = ARGV) ⇒ Object 



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# File 'lib/linecook/commands/compile.rb', line 26

def parse(argv=ARGV)
  super(argv) do |options|
    options.on('-I DIRECTORY', 'prepend to LOAD_PATH') do |path|
      $LOAD_PATH.unshift File.expand_path(path)
    end

    options.on('-r LIBRARY', 'require the library') do |path|
      require(path)
    end

    options.on('-G GEMNAME', 'add gem to cookbook path', :option_type => :list) do |name|
      specs = Gem.source_index.find_name(name)
      if specs.empty?
        raise CommandError, "could not find gem: #{name.inspect}"
      end
      (options[:cookbook_path] ||= []) << specs.first.full_gem_path
    end

    options.on('-g', '--gems', 'add latest cookbook gems') do |name|
      (options[:cookbook_path] ||= []).concat cookbook_gem_paths
    end

    options.on('-c', '--common', 'use common flags') do
      set_common_options(options)
    end

    if block_given?
      yield(options)
    end
  end
end

.set_common_options(options) ⇒ Object 



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# File 'lib/linecook/commands/compile.rb', line 58

def set_common_options(options)
  cookbook_path = (options[:cookbook_path] ||= [])
  cookbook_path << '.'
  cookbook_path.concat cookbook_gem_paths
  (options[:helper_dirs] ||= []) << 'helpers'
  options
end

Instance Method Details

#compile_helpers(helper_dir) ⇒ Object 



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# File 'lib/linecook/commands/compile.rb', line 166

def compile_helpers(helper_dir)
  compiler = CompileHelper.new(
    :force => force,
    :quiet => true
  )

  helpers = glob_helpers(helper_dir)
  helpers.each do |(name, sources)|
    compiler.process(name, *sources)
  end

  $LOAD_PATH.unshift compiler.output_dir
end

#glob_helpers(helper_dir) ⇒ Object 



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# File 'lib/linecook/commands/compile.rb', line 149

def glob_helpers(helper_dir)
  sources = {}
  helpers = []

  Dir.glob("#{helper_dir}/*/**/*").each do |source_file|
    next if File.directory?(source_file)
    (sources[File.dirname(source_file)] ||= []) << source_file
  end

  sources.each_pair do |dir, source_files|
    name = dir[(helper_dir.length + 1)..-1]
    helpers << [name, source_files]
  end

  helpers.sort_by {|name, source_files| name }
end

#input_dir=(input) ⇒ Object 



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# File 'lib/linecook/commands/compile.rb', line 92

def input_dir=(input)
  @input_dir = File.expand_path(input)
end

#load_env(package_file) ⇒ Object 



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# File 'lib/linecook/commands/compile.rb', line 144

def load_env(package_file)
  env = package_file && File.exists?(package_file) ? YAML.load_file(package_file) : nil
  env.nil? ? {} : env
end

#output_dir=(input) ⇒ Object 



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# File 'lib/linecook/commands/compile.rb', line 96

def output_dir=(input)
  @output_dir = File.expand_path(input)
end

#process(*recipes) ⇒ Object 



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# File 'lib/linecook/commands/compile.rb', line 100

def process(*recipes)
  helper_dirs.each do |helper_dir|
    compile_helpers(helper_dir)
  end

  package  = Package.new(load_env(package_file))
  cookbook = Cookbook.new(*cookbook_path)
  stdout   = StringIO.new

  recipes.each do |recipe_path|
    recipe = Recipe.new(package, cookbook)

    if recipe_path == '-'
      recipe.instance_eval $stdin.read, 'stdin'
      stdout.print recipe
    else
      recipe_path = File.expand_path(recipe_path)
      recipe.register_as relative_path(input_dir, recipe_path).chomp('.rb')
      recipe.instance_eval File.read(recipe_path), recipe_path
      recipe.register_to package
    end
  end

  package.export(output_dir) do |src, dest|
    unless force
      raise CommandError, "already exists: #{dest.inspect}"
    end

    FileUtils.rm_rf(dest)
    true
  end

  # print to $stdout after export to ensure files will be available
  $stdout << stdout.string
end

#relative_path(dir, path) ⇒ Object 



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# File 'lib/linecook/commands/compile.rb', line 136

def relative_path(dir, path)
  if path.index(dir) == 0 && path != dir
    path[dir.length + 1, path.length - dir.length]
  else
    File.basename(path)
  end
end