Class: Bundler::EnvironmentPreserver

Inherits:
Object
  • Object
show all
Defined in:
lib/bundler/environment_preserver.rb

Constant Summary collapse

INTENTIONALLY_NIL = 
"BUNDLER_ENVIRONMENT_PRESERVER_INTENTIONALLY_NIL"
BUNDLER_KEYS = 
%w[
  BUNDLE_BIN_PATH
  BUNDLE_GEMFILE
  BUNDLER_VERSION
  BUNDLER_SETUP
  GEM_HOME
  GEM_PATH
  MANPATH
  PATH
  RB_USER_INSTALL
  RUBYLIB
  RUBYOPT
].map(&:freeze).freeze
BUNDLER_PREFIX = 
"BUNDLER_ORIG_"

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(env, keys) ⇒ EnvironmentPreserver

Returns a new instance of EnvironmentPreserver.

Parameters:

  • env (Hash)
  • keys (Array<String>) 


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# File 'lib/bundler/environment_preserver.rb', line 27

def initialize(env, keys)
  @original = env
  @keys = keys
  @prefix = BUNDLER_PREFIX
end

Class Method Details

.from_env ⇒ Object 



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# File 'lib/bundler/environment_preserver.rb', line 21

def self.from_env
  new(ENV.to_hash, BUNDLER_KEYS)
end

Instance Method Details

#backup ⇒ Hash

Returns:

  • (Hash) 


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# File 'lib/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 ⇒ Object

Replaces ‘ENV` with the bundler environment variables backed up



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# File 'lib/bundler/environment_preserver.rb', line 34

def replace_with_backup
  ENV.replace(backup)
end

#restore ⇒ Hash

Returns:

  • (Hash) 


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# File 'lib/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