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require 'fileutils'
require 'rubygems'
require 'rubygems/package'
# This library is used by "make extract-gems" to
# unpack bundled gem files.
def Gem.unpack(file, dir = ".")
pkg = Gem::Package.new(file)
spec = pkg.spec
target = spec.full_name
Gem.ensure_gem_subdirectories(dir)
gem_dir = File.join(dir, "gems", target)
pkg.extract_files gem_dir
spec_dir = spec.extensions.empty? ? "specifications" : File.join("gems", target)
File.binwrite(File.join(dir, spec_dir, "#{target}.gemspec"), spec.to_ruby)
unless spec.extensions.empty?
spec.dependencies.clear
File.binwrite(File.join(dir, spec_dir, ".bundled.#{target}.gemspec"), spec.to_ruby)
end
if spec.bindir and spec.executables
bindir = File.join(dir, "bin")
Dir.mkdir(bindir) rescue nil
spec.executables.each do |exe|
File.open(File.join(bindir, exe), "wb", 0o777) {|f|
f.print "#!ruby\n",
%[load File.realpath("../gems/#{target}/#{spec.bindir}/#{exe}", __dir__)\n]
}
end
end
FileUtils.rm_rf(Dir.glob("#{gem_dir}/.git*"))
puts "Unpacked #{file}"
end
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