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

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 33

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

Class Method Details

.env_to_hash(env) ⇒ Object 



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# File 'lib/bundler/environment_preserver.rb', line 24

def self.env_to_hash(env)
  to_hash = env.to_hash
  return to_hash unless Gem.win_platform?

  to_hash.each_with_object({}) {|(k,v), a| a[k.upcase] = v }
end

.from_env ⇒ Object 



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# File 'lib/bundler/environment_preserver.rb', line 20

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

Instance Method Details

#backup ⇒ Hash

Returns:

  • (Hash) 


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# File 'lib/bundler/environment_preserver.rb', line 56

def backup
  env = @original.clone
  @keys.each do |key|
    value = env[key]
    if !value.nil? && !value.empty?
      env[@prefix + key] ||= value
    elsif value.nil?
      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 40

def replace_with_backup
  unless Gem.win_platform?
    ENV.replace(backup)
    return
  end

  # Fallback logic for Windows below to workaround
  # https://bugs.ruby-lang.org/issues/16798. Can be dropped once all
  # supported rubies include the fix for that.

  ENV.clear

  backup.each {|k, v| ENV[k] = v }
end

#restore ⇒ Hash

Returns:

  • (Hash) 


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# File 'lib/bundler/environment_preserver.rb', line 70

def restore
  env = @original.clone
  @keys.each do |key|
    value_original = env[@prefix + key]
    next if value_original.nil? || value_original.empty?
    if value_original == INTENTIONALLY_NIL
      env.delete(key)
    else
      env[key] = value_original
    end
    env.delete(@prefix + key)
  end
  env
end