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# frozen_string_literal: true
module Bootsnap
module ExplicitRequire
ARCHDIR = RbConfig::CONFIG["archdir"]
RUBYLIBDIR = RbConfig::CONFIG["rubylibdir"]
DLEXT = RbConfig::CONFIG["DLEXT"]
def self.from_self(feature)
require_relative("../#{feature}")
end
def self.from_rubylibdir(feature)
require(File.join(RUBYLIBDIR, "#{feature}.rb"))
end
def self.from_archdir(feature)
require(File.join(ARCHDIR, "#{feature}.#{DLEXT}"))
end
# Given a set of gems, run a block with the LOAD_PATH narrowed to include
# only core ruby source paths and these gems -- that is, roughly,
# temporarily remove all gems not listed in this call from the LOAD_PATH.
#
# This is useful before bootsnap is fully-initialized to load gems that it
# depends on, without forcing full LOAD_PATH traversals.
def self.with_gems(*gems)
# Ensure the gems are activated (their paths are in $LOAD_PATH)
gems.each do |gem_name|
gem gem_name
end
orig = $LOAD_PATH.dup
$LOAD_PATH.clear
gems.each do |gem|
pat = %r{
/
(gems|extensions/[^/]+/[^/]+) # "gems" or "extensions/x64_64-darwin16/2.3.0"
/
#{Regexp.escape(gem)}-(\h{12}|(\d+\.)) # msgpack-1.2.3 or msgpack-1234567890ab
}x
$LOAD_PATH.concat(orig.grep(pat))
end
$LOAD_PATH << ARCHDIR
$LOAD_PATH << RUBYLIBDIR
begin
yield
rescue LoadError
$LOAD_PATH.replace(orig)
yield
end
ensure
$LOAD_PATH.replace(orig)
end
end
end
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