class Bundler::EnvironmentPreserver - bundler: Ruby Standard Library Documentation

# class Bundler::EnvironmentPreserver

### Constants

BUNDLER_KEYS
BUNDLER_PREFIX
INTENTIONALLY_NIL

### Public Class Methods

from_env() click to toggle source

    # File bundler/environment_preserver.rb, line 21
    def self.from_env
      new(ENV.to_hash, BUNDLER_KEYS)
    end

new(env, keys) click to toggle source

@param env [Hash] @param keys [Array<String>]

    # File bundler/environment_preserver.rb, line 27
    def initialize(env, keys)
      @original = env
      @keys = keys
      @prefix = BUNDLER_PREFIX
    end

### Public Instance Methods

backup() click to toggle source

@return [Hash]

    # File bundler/environment_preserver.rb, line 39
    def backup
      env = @original.clone
      @keys.each do |key|
        value = env[key]
        if !value.nil?
          env[@prefix + key] ||= value
        else
          env[@prefix + key] ||= INTENTIONALLY_NIL
        end
      end
      env
    end

replace_with_backup() click to toggle source

Replaces ‘ENV` with the bundler environment variables backed up

    # File bundler/environment_preserver.rb, line 34
    def replace_with_backup
      ENV.replace(backup)
    end

restore() click to toggle source

@return [Hash]

    # File bundler/environment_preserver.rb, line 53
    def restore
      env = @original.clone
      @keys.each do |key|
        value_original = env[@prefix + key]
        next if value_original.nil?
        if value_original == INTENTIONALLY_NIL
          env.delete(key)
        else
          env[key] = value_original
        end
        env.delete(@prefix + key)
      end
      env
    end