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# frozen_string_literal: true
module Gem::BundlerVersionFinder
def self.bundler_version
v = ENV["BUNDLER_VERSION"]
v ||= bundle_update_bundler_version
return if v == true
v ||= lockfile_version
return unless v
Gem::Version.new(v)
end
def self.prioritize!(specs)
exact_match_index = specs.find_index {|spec| spec.version == bundler_version }
return unless exact_match_index
specs.unshift(specs.delete_at(exact_match_index))
end
def self.bundle_update_bundler_version
return unless File.basename($0) == "bundle".freeze
return unless "update".start_with?(ARGV.first || " ")
bundler_version = nil
update_index = nil
ARGV.each_with_index do |a, i|
if update_index && update_index.succ == i && a =~ Gem::Version::ANCHORED_VERSION_PATTERN
bundler_version = a
end
next unless a =~ /\A--bundler(?:[= ](#{Gem::Version::VERSION_PATTERN}))?\z/
bundler_version = $1 || true
update_index = i
end
bundler_version
end
private_class_method :bundle_update_bundler_version
def self.lockfile_version
return unless contents = lockfile_contents
regexp = /\n\nBUNDLED WITH\n\s{2,}(#{Gem::Version::VERSION_PATTERN})\n/
return unless contents =~ regexp
$1
end
private_class_method :lockfile_version
def self.lockfile_contents
gemfile = ENV["BUNDLE_GEMFILE"]
gemfile = nil if gemfile && gemfile.empty?
unless gemfile
begin
Gem::Util.traverse_parents(Dir.pwd) do |directory|
next unless gemfile = Gem::GEM_DEP_FILES.find {|f| File.file?(f.tap(&Gem::UNTAINT)) }
gemfile = File.join directory, gemfile
break
end
rescue Errno::ENOENT
return
end
end
return unless gemfile
lockfile = case gemfile
when "gems.rb" then "gems.locked"
else "#{gemfile}.lock"
end.dup.tap(&Gem::UNTAINT)
return unless File.file?(lockfile)
File.read(lockfile)
end
private_class_method :lockfile_contents
end
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