类 Gem::PathSupport

Gem::PathSupport 负责处理 GEM_HOME 和 GEM_PATH 环境变量，并将其提供给 RubyGems 的其余部分。

属性

home[R]

用于管理 Gems 的默认系统路径。

path[R]

用于搜索 Gems 的路径数组。

公共类方法

new(env) 点击切换源码

构造函数。接受一个参数，该参数被视为哈希表，或默认为 ENV，即系统环境。

# File rubygems/path_support.rb, line 26
def initialize(env)
  @home = normalize_home_dir(env["GEM_HOME"] || Gem.default_dir)
  @path = split_gem_path env["GEM_PATH"], @home

  @spec_cache_dir = env["GEM_SPEC_CACHE"] || Gem.default_spec_cache_dir
end

私有实例方法

default_path() 点击切换源码

返回默认的 Gem 路径

# File rubygems/path_support.rb, line 74
def default_path
  Gem.default_path + [@home]
end

expand(path) 点击切换源码

# File rubygems/path_support.rb, line 78
def expand(path)
  if File.directory?(path)
    File.realpath(path)
  else
    path
  end
end

normalize_home_dir(home) 点击切换源码

# File rubygems/path_support.rb, line 35
def normalize_home_dir(home)
  if File::ALT_SEPARATOR
    home = home.gsub(File::ALT_SEPARATOR, File::SEPARATOR)
  end

  expand(home)
end

split_gem_path(gpaths, home) 点击切换源码

拆分 Gem 搜索路径 (如 Gem.path 报告的那样)。

# File rubygems/path_support.rb, line 46
def split_gem_path(gpaths, home)
  # FIX: it should be [home, *path], not [*path, home]

  gem_path = []

  if gpaths
    gem_path = gpaths.split(Gem.path_separator)
    # Handle the path_separator being set to a regexp, which will cause
    # end_with? to error
    if /#{Gem.path_separator}\z/.match?(gpaths)
      gem_path += default_path
    end

    if File::ALT_SEPARATOR
      gem_path.map! do |this_path|
        this_path.gsub File::ALT_SEPARATOR, File::SEPARATOR
      end
    end

    gem_path << home
  else
    gem_path = default_path
  end

  gem_path.map {|path| expand(path) }.uniq
end