Class: NetLinx::Compile::ExtensionDiscovery

Inherits:
Object
  • Object
show all
Defined in:
lib/netlinx/compile/extension_discovery.rb

Overview

Discovers and auto-requires add-on Ruby libraries for netlinx-compile.

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.handlers ⇒ Object

An array of ExtensionHandlers installed on the system. #discover must be run before this array is populated.



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# File 'lib/netlinx/compile/extension_discovery.rb', line 10

def handlers
  @handlers
end

Class Method Details

.discover ⇒ Object

Searches for gems with 'netlinx-compile' as a dependency. The 'lib/netlinx/compile/extension/*' path is checked for compiler extensions.



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# File 'lib/netlinx/compile/extension_discovery.rb', line 17

def discover
  # Require extensions built into netlinx-compile.
  nc_gem = Gem::Specification.find_by_name 'netlinx-compile'
  nc_gem_path = File.expand_path 'lib/netlinx/compile/extension', nc_gem.gem_dir
  nc_gem_files = Dir["#{nc_gem_path}/*.rb"]
  nc_gem_files.each {|file| require file}
  
  # Find gems with a dependency on 'netlinx-compile'.
  gems = Gem::Specification.each
    .select{|gem| gem.dependencies
      .select{|dependency| dependency.name == 'netlinx-compile'}
      .empty? == false
    }
  
  # Load any Ruby files in their lib/netlinx/compile/extension paths.
  gems.each do |gem|
    extension_path = File.expand_path 'lib/netlinx/compile/extension', gem.gem_dir
    files = Dir["#{extension_path}/*.rb"]
    files.each {|file| require file}
  end
  
  # Register ExtensionHandler objects.
  @handlers = NetLinx::Compile::Extension.constants
    .map{|c| NetLinx::Compile::Extension.const_get c}
    .select{|c| c.is_a? Class}
    .map{|c| c.get_handler if c.respond_to? :get_handler}
    .select{|c| not c.nil?}
end

.get_handler(filename) ⇒ ExtensionHandler

Parameters:

Returns:



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# File 'lib/netlinx/compile/extension_discovery.rb', line 57

def get_handler(filename)
  @handlers.select{|h| h.include? filename}.first
end

.workspace_extensions ⇒ Array<String>

Returns workspace file extensions.

Returns:

  • (Array<String>) —

    workspace file extensions.



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# File 'lib/netlinx/compile/extension_discovery.rb', line 47

def workspace_extensions
  @handlers
    .select{|h| h.is_a_workspace?}
    .map{|h| h.extensions}
    .flatten
end