Class: Tap::Env::Cache

Inherits:
Object
  • Object
show all
Defined in:
lib/tap/env/cache.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(dir = Dir.pwd, debug = false) ⇒ Cache

Returns a new instance of Cache.



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# File 'lib/tap/env/cache.rb', line 10

def initialize(dir=Dir.pwd, debug=false)
  @cache_home = File.expand_path("#{RbConfig::CONFIG['RUBY_INSTALL_NAME']}/#{RUBY_VERSION}", dir)
  @debug = debug
end

Instance Attribute Details

#cache_home ⇒ Object (readonly)

Returns the value of attribute cache_home.



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# File 'lib/tap/env/cache.rb', line 8

def cache_home
  @cache_home
end

Instance Method Details

#generate(spec) ⇒ Object 



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# File 'lib/tap/env/cache.rb', line 73

def generate(spec)
  lines = Env.generate(
    :dir => spec.full_gem_path, 
    :pathfile => File.expand_path(Path::FILE, spec.full_gem_path),
    :load_paths => false)
  
  lines.unshift "# Generated for #{spec.full_name} on #{Time.now}.  Do not edit."
  lines << "activate #{spec.name} #{spec.version}"
  lines.uniq!
  lines.sort!
  lines.join("\n")
end

#search(pattern, version_requirements) ⇒ Object 



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# File 'lib/tap/env/cache.rb', line 32

def search(pattern, version_requirements)
  dependency = Gem::Dependency.new(pattern, version_requirements)
  
  sources = {}
  Gem.source_index.search(dependency).sort_by do |spec|
    spec.version
  end.reverse_each do |spec|
    sources[spec.name] ||= spec
  end
  
  paths = []
  sources.values.sort_by do |spec|
    spec.name
  end.each do |spec|
    unless File.exists? File.expand_path(Path::FILE, spec.full_gem_path)
      next
    end
    
    path = File.join(cache_home, spec.full_name)
    gem_path = spec.full_gem_path
    
    unless FileUtils.uptodate?(path, [gem_path, __FILE__])
      unless File.exists?(cache_home)
        FileUtils.mkdir_p(cache_home)
      end
      
      if @debug 
        $stderr.puts(App::LOG_FORMAT % [' ', nil, :generate, spec.full_name])
      end
      
      File.open(path, 'w') do |io|
        io << generate(spec)
      end
    end
    
    paths << path
  end
  
  paths
end

#select(dependencies) ⇒ Object 



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# File 'lib/tap/env/cache.rb', line 15

def select(dependencies)
  if dependencies.kind_of?(String)
    dependencies = dependencies.split(':')
  end
  
  paths = []
  dependencies.collect! do |dep|
    dep.kind_of?(String) ? dep.split(',', 2) : dep
  end.each do |(pattern, version_requirements)|
    pattern = Regexp.new(pattern) if pattern.kind_of?(String)
    paths.concat search(pattern, version_requirements)
  end
  
  paths.uniq!
  paths
end