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