Module: Hairballs::LibraryHelpers

Included in:
Plugin, Theme
Defined in:
lib/hairballs/library_helpers.rb

Overview

Helpers specifying and requiring dependencies for Themes and Plugins.

Instance Method Summary collapse

Instance Method Details

#do_bundler_extending ⇒ Object

Add all gems in the global gemset to the $LOAD_PATH so they can be used even in places like ‘rails console’.

TODO: Use #find_latest_gem for each of #libraries.



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# File 'lib/hairballs/library_helpers.rb', line 59

def do_bundler_extending
  if defined?(::Bundler)
    all_global_gem_paths = Dir.glob("#{Gem.dir}/gems/*")

    all_global_gem_paths.each do |p|
      gem_path = "#{p}/lib"
      $LOAD_PATH.unshift(gem_path)
    end
  else
    vputs 'Bundler not defined.  Skipping.'
  end
end

#find_latest_gem(gem_name) ⇒ String

Path to the highest version of the gem with the given gem.

Parameters:

  • gem_name (String)

Returns:

  • (String) 


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# File 'lib/hairballs/library_helpers.rb', line 49

def find_latest_gem(gem_name)
  the_gem = Dir.glob("#{Gem.dir}/gems/#{gem_name}-*")

  the_gem.empty? ? nil : the_gem.sort.last
end

#libraries(libs = nil) ⇒ Object

Parameters:

  • libs (Array<String>) (defaults to: nil) 


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# File 'lib/hairballs/library_helpers.rb', line 7

def libraries(libs=nil)
  return @libraries if @libraries && libs.nil?

  @libraries = if libs
    libs
  else
    yield([])
  end
end

#require_libraries ⇒ Object

Requires #libraries on load. If they’re not installed, install them. If it can’t be installed, move on to the next.



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# File 'lib/hairballs/library_helpers.rb', line 19

def require_libraries
  return if @libraries.nil?

  @libraries.each do |lib|
    retry_count = 0

    begin
      next if retry_count == 2
      vputs "Requiring library: #{lib}"
      require lib
    rescue LoadError
      puts "#{lib} not installed; installing now..."
      Gem.install lib

      if Hairballs.rails?
        installed_gem = find_latest_gem(lib)
        $LOAD_PATH.unshift("#{installed_gem}/lib")
      end

      require lib
      retry_count += 1
      retry
    end
  end
end

#undo_bundler_extending ⇒ Object

Undo the stuff that was done in #do_bundler_extending.

TODO: Use #find_latest_gem for each of #libraries.



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# File 'lib/hairballs/library_helpers.rb', line 75

def undo_bundler_extending
  if defined?(::Bundler)
    all_global_gem_paths = Dir.glob("#{Gem.dir}/gems/*")

    all_global_gem_paths.each do |p|
      gem_path = "#{p}/lib"
      $LOAD_PATH.delete(gem_path)
    end
  else
    vputs 'Bundler not defined.  Skipping.'
  end
end