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# frozen_string_literal: true
#--
# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
# All rights reserved.
# See LICENSE.txt for permissions.
#++
require 'rubygems/user_interaction'
class Gem::Ext::Builder
include Gem::UserInteraction
##
# The builder shells-out to run various commands after changing the
# directory. This means multiple installations cannot be allowed to build
# extensions in parallel as they may change each other's directories leading
# to broken extensions or failed installations.
CHDIR_MUTEX = Mutex.new # :nodoc:
attr_accessor :build_args # :nodoc:
def self.class_name
name =~ /Ext::(.*)Builder/
$1.downcase
end
def self.make(dest_path, results)
unless File.exist? 'Makefile'
raise Gem::InstallError, 'Makefile not found'
end
# try to find make program from Ruby configure arguments first
RbConfig::CONFIG['configure_args'] =~ /with-make-prog\=(\w+)/
make_program = ENV['MAKE'] || ENV['make'] || $1
unless make_program
make_program = (/mswin/ =~ RUBY_PLATFORM) ? 'nmake' : 'make'
end
destdir = '"DESTDIR=%s"' % ENV['DESTDIR']
['clean', '', 'install'].each do |target|
# Pass DESTDIR via command line to override what's in MAKEFLAGS
cmd = [
make_program,
destdir,
target
].join(' ').rstrip
begin
run(cmd, results, "make #{target}".rstrip)
rescue Gem::InstallError
raise unless target == 'clean' # ignore clean failure
end
end
end
def self.redirector
warn "#{caller[0]}: Use IO.popen(..., err: [:child, :out])"
'2>&1'
end
def self.run(command, results, command_name = nil)
verbose = Gem.configuration.really_verbose
begin
rubygems_gemdeps, ENV['RUBYGEMS_GEMDEPS'] = ENV['RUBYGEMS_GEMDEPS'], nil
if verbose
puts("current directory: #{Dir.pwd}")
p(command)
end
results << "current directory: #{Dir.pwd}"
results << (command.respond_to?(:shelljoin) ? command.shelljoin : command)
redirections = verbose ? {} : {err: [:child, :out]}
IO.popen(command, "r", redirections) do |io|
if verbose
IO.copy_stream(io, $stdout)
else
results << io.read
end
end
rescue => error
raise Gem::InstallError, "#{command_name || class_name} failed#{error.message}"
ensure
ENV['RUBYGEMS_GEMDEPS'] = rubygems_gemdeps
end
unless $?.success?
results << "Building has failed. See above output for more information on the failure." if verbose
exit_reason =
if $?.exited?
", exit code #{$?.exitstatus}"
elsif $?.signaled?
", uncaught signal #{$?.termsig}"
end
raise Gem::InstallError, "#{command_name || class_name} failed#{exit_reason}"
end
end
##
# Creates a new extension builder for +spec+. If the +spec+ does not yet
# have build arguments, saved, set +build_args+ which is an ARGV-style
# array.
def initialize(spec, build_args = spec.build_args)
@spec = spec
@build_args = build_args
@gem_dir = spec.full_gem_path
@ran_rake = nil
end
##
# Chooses the extension builder class for +extension+
def builder_for(extension) # :nodoc:
case extension
when /extconf/ then
Gem::Ext::ExtConfBuilder
when /configure/ then
Gem::Ext::ConfigureBuilder
when /rakefile/i, /mkrf_conf/i then
@ran_rake = true
Gem::Ext::RakeBuilder
when /CMakeLists.txt/ then
Gem::Ext::CmakeBuilder
else
extension_dir = File.join @gem_dir, File.dirname(extension)
message = "No builder for extension '#{extension}'"
build_error extension_dir, message
end
end
##
# Logs the build +output+ in +build_dir+, then raises Gem::Ext::BuildError.
def build_error(build_dir, output, backtrace = nil) # :nodoc:
gem_make_out = write_gem_make_out output
message = <<-EOF
ERROR: Failed to build gem native extension.
#{output}
Gem files will remain installed in #{@gem_dir} for inspection.
Results logged to #{gem_make_out}
EOF
raise Gem::Ext::BuildError, message, backtrace
end
def build_extension(extension, dest_path) # :nodoc:
results = []
# FIXME: Determine if this line is necessary and, if so, why.
# Notes:
# 1. As far as I can tell, this method is only called by +build_extensions+.
# 2. The existence of this line implies +extension+ is, or previously was,
# sometimes +false+ or +nil+.
# 3. #1 and #2 combined suggests, but does not confirm, that
# +@specs.extensions+ sometimes contained +false+ or +nil+ values.
# 4. Nothing seems to explicitly handle +extension+ being empty,
# which makes me wonder both what it should do and what it does.
#
# - @duckinator
extension ||= '' # I wish I knew why this line existed
extension_dir =
File.expand_path File.join(@gem_dir, File.dirname(extension))
lib_dir = File.join @spec.full_gem_path, @spec.raw_require_paths.first
builder = builder_for extension
begin
FileUtils.mkdir_p dest_path
CHDIR_MUTEX.synchronize do
pwd = Dir.getwd
Dir.chdir extension_dir
begin
results = builder.build(extension, dest_path,
results, @build_args, lib_dir)
verbose { results.join("\n") }
ensure
begin
Dir.chdir pwd
rescue SystemCallError
Dir.chdir dest_path
end
end
end
write_gem_make_out results.join "\n"
rescue => e
results << e.message
build_error extension_dir, results.join("\n"), $@
end
end
##
# Builds extensions. Valid types of extensions are extconf.rb files,
# configure scripts and rakefiles or mkrf_conf files.
def build_extensions
return if @spec.extensions.empty?
if @build_args.empty?
say "Building native extensions. This could take a while..."
else
say "Building native extensions with: '#{@build_args.join ' '}'"
say "This could take a while..."
end
dest_path = @spec.extension_dir
FileUtils.rm_f @spec.gem_build_complete_path
# FIXME: action at a distance: @ran_rake modified deep in build_extension(). - @duckinator
@ran_rake = false # only run rake once
@spec.extensions.each do |extension|
break if @ran_rake
build_extension extension, dest_path
end
FileUtils.touch @spec.gem_build_complete_path
end
##
# Writes +output+ to gem_make.out in the extension install directory.
def write_gem_make_out(output) # :nodoc:
destination = File.join @spec.extension_dir, 'gem_make.out'
FileUtils.mkdir_p @spec.extension_dir
File.open destination, 'wb' do |io| io.puts output end
destination
end
end
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