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90085f62fb
Overriding the version constant feels too magic and creates a set of
problems. For example, Bundler will lock the simulated version, and that
can cause issues when the lockfile is used under an environment not
simulating Bundler 4 (it will try to auto-install and auto-switch to a
version that does not exist).
On top of that, it can only be configured with an ENV variable which is
not too flexible.
This commit takes a different approach of using a setting, which is
configurable through ENV or `bundle config`, and pass the simulated
version to `Bundler::FeatureFlag`. The real version is still the one set
by `VERSION`, but anything that `Bundler::FeatureFlag` controls will use
the logic of the "simulated version".
In particular, all feature flags and deprecation messages will respect
the simulated version, and this is exactly the set of functionality that
we want users to be able to easily try before releasing it.
8129402193
68 lines
1.4 KiB
Ruby
68 lines
1.4 KiB
Ruby
# frozen_string_literal: true
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module Bundler
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class EnvironmentPreserver
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INTENTIONALLY_NIL = "BUNDLER_ENVIRONMENT_PRESERVER_INTENTIONALLY_NIL"
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BUNDLER_KEYS = %w[
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BUNDLE_BIN_PATH
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BUNDLE_GEMFILE
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BUNDLER_VERSION
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BUNDLER_SETUP
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GEM_HOME
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GEM_PATH
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MANPATH
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PATH
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RB_USER_INSTALL
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RUBYLIB
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RUBYOPT
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].map(&:freeze).freeze
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BUNDLER_PREFIX = "BUNDLER_ORIG_"
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def self.from_env
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new(ENV.to_hash, BUNDLER_KEYS)
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end
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# @param env [Hash]
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# @param keys [Array<String>]
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def initialize(env, keys)
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@original = env
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@keys = keys
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@prefix = BUNDLER_PREFIX
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end
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# Replaces `ENV` with the bundler environment variables backed up
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def replace_with_backup
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ENV.replace(backup)
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end
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# @return [Hash]
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def backup
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env = @original.clone
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@keys.each do |key|
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value = env[key]
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if !value.nil?
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env[@prefix + key] ||= value
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else
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env[@prefix + key] ||= INTENTIONALLY_NIL
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end
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end
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env
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end
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# @return [Hash]
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def restore
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env = @original.clone
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@keys.each do |key|
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value_original = env[@prefix + key]
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next if value_original.nil?
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if value_original == INTENTIONALLY_NIL
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env.delete(key)
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else
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env[key] = value_original
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end
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env.delete(@prefix + key)
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end
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env
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end
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end
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end
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