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#!/usr/bin/ruby -s
# -*- coding: us-ascii -*-
require 'uri'
require 'digest/sha1'
require 'digest/sha2'
require 'fileutils'
require 'shellwords'
require 'tmpdir'
require 'pathname'
require File.expand_path("../lib/vcs", __FILE__)
require File.expand_path("../lib/colorize", __FILE__)
STDOUT.sync = true

$srcdir ||= nil
$exported = nil if ($exported ||= nil) == ""
$archname = nil if ($archname ||= nil) == ""
$keep_temp ||= nil
$patch_file ||= nil
$packages ||= nil
$digests ||= nil
$s3 ||= nil
$tooldir = File.expand_path("..", __FILE__)
$unicode_version = nil if ($unicode_version ||= nil) == ""
$colorize = Colorize.new

def usage
  <<USAGE
usage: #{File.basename $0} [option...] new-directory-to-save [version ...]
options:
  -srcdir=PATH          source directory path
  -exported=PATH        make snapshot from already exported working directory
  -archname=NAME        make the basename of snapshots NAME
  -keep_temp            keep temporary working directory
  -patch_file=PATCH     apply PATCH file after export
  -packages=PKG[,...]   make PKG packages (#{PACKAGES.keys.join(", ")})
  -digests=ALG[,...]    show ALG digests (#{DIGESTS.join(", ")})
  -unicode_version=VER  Unicode version to generate encodings
  -svn[=URL]            make snapshot from SVN repository
                        (#{SVNURL})
  -git[=URL]            make snapshot from GIT repository
                        (#{GITURL})
  -s3=PATH              s3 bucket path(default=tmp)
  -help, --help         show this message
version:
  master, trunk, stable, branches/*, tags/*, X.Y, X.Y.Z, X.Y.Z-pL
each versions may be followed by optional @revision.
USAGE
end

DIGESTS = %w[SHA1 SHA256 SHA512]
PACKAGES = {
  "bzip" => %w".tar.bz2 bzip2 -c",
  "gzip" => %w".tar.gz  gzip -c",
  "xz"   => %w".tar.xz  xz -c",
  "zip"  => %w".zip     zip -qr",
}

if system("7z", out: IO::NULL)
  PACKAGES["gzip"] = %w".tar.gz 7z a dummy -tgzip -mx -so"
  PACKAGES["zip"]  = %w".zip    7z a -tzip  -mx" << {out: IO::NULL}
elsif gzip = ENV.delete("GZIP")
  PACKAGES["gzip"].concat(gzip.shellsplit)
end

if mflags = ENV["GNUMAKEFLAGS"] and /\A-(\S*)j\d*/ =~ mflags
  mflags = mflags.gsub(/(\A|\s)(-\S*)j\d*/, '\1\2')
  mflags.strip!
  ENV["GNUMAKEFLAGS"] = (mflags unless mflags.empty?)
end
ENV["LC_ALL"] = ENV["LANG"] = "C"
SVNURL = URI.parse("https://svn.ruby-lang.org/repos/ruby/")
# https git clone is disabled at git.ruby-lang.org/ruby.git.
GITURL = URI.parse("https://github.com/ruby/ruby.git")
RUBY_VERSION_PATTERN = /^\#define\s+RUBY_VERSION\s+"([\d.]+)"/

ENV["VPATH"] ||= "include/ruby"
YACC = ENV["YACC"] ||= "bison"
ENV["BASERUBY"] ||= "ruby"
ENV["RUBY"] ||= "ruby"
ENV["MV"] ||= "mv"
ENV["RM"] ||= "rm -f"
ENV["MINIRUBY"] ||= "ruby"
ENV["PROGRAM"] ||= "ruby"
ENV["AUTOCONF"] ||= "autoconf"
ENV["BUILTIN_TRANSOBJS"] ||= "newline.o"

class String
  # for older ruby
  alias bytesize size unless method_defined?(:bytesize)
end

class Dir
  def self.mktmpdir(path)
    path = File.join(tmpdir, path+"-#{$$}-#{rand(100000)}")
    begin
      mkdir(path)
    rescue Errno::EEXIST
      path.succ!
      retry
    end
    path
  end unless respond_to?(:mktmpdir)
end

$packages &&= $packages.split(/[, ]+/).tap {|pkg|
  if all = pkg.index("all")
    pkg[all, 1] = PACKAGES.keys - pkg
  end
  pkg -= PACKAGES.keys
  pkg.empty? or abort "#{File.basename $0}: unknown packages - #{pkg.join(", ")}"
}
$packages ||= PACKAGES.keys

$digests &&= $digests.split(/[, ]+/).tap {|dig|
  dig -= DIGESTS
  dig.empty? or abort "#{File.basename $0}: unknown digests - #{dig.join(", ")}"
}
$digests ||= DIGESTS

$patch_file &&= File.expand_path($patch_file)
path = ENV["PATH"].split(File::PATH_SEPARATOR)
%w[YACC BASERUBY RUBY MV MINIRUBY].each do |var|
  cmd, = ENV[var].shellsplit
  unless path.any? {|dir|
      file = File.expand_path(cmd, dir)
      File.file?(file) and File.executable?(file)
    }
    abort "#{File.basename $0}: #{var} command not found - #{cmd}"
  end
end

%w[BASERUBY RUBY MINIRUBY].each do |var|
  %x[#{ENV[var]} --disable-gem -e1 2>&1]
  if $?.success?
    ENV[var] += ' --disable-gem'
  end
end

if defined?($help) or defined?($_help)
  puts usage
  exit
end
unless destdir = ARGV.shift
  abort usage
end
revisions = ARGV.empty? ? [nil] : ARGV
unless tmp = $exported
  FileUtils.mkpath(destdir)
  destdir = File.expand_path(destdir)
  tmp = Dir.mktmpdir("ruby-snapshot")
  FileUtils.mkpath(tmp)
  at_exit {
    Dir.chdir "/"
    FileUtils.rm_rf(tmp)
  } unless $keep_temp
end

def tar_create(tarball, dir)
  require 'rubygems'
  require 'rubygems/package'
  require 'rubygems/package/tar_writer'
  header = Gem::Package::TarHeader
  dir_type = "5"
  uname = gname = "ruby"
  File.open(tarball, "wb") do |f|
    w = Gem::Package::TarWriter.new(f)
    Dir.glob("#{dir}/**/*", File::FNM_DOTMATCH) do |path|
      next if File.basename(path) == "."
      s = File.stat(path)
      mode = 0644
      case
      when s.file?
        type = nil
        size = s.size
        mode |= 0111 if s.executable?
      when s.directory?
        path += "/"
        type = dir_type
        size = 0
        mode |= 0111
      else
        next
      end
      name, prefix = w.split_name(path)
      h = header.new(name: name, prefix: prefix, typeflag: type,
                     mode: mode, size: size, mtime: s.mtime,
                     uname: uname, gname: gname)
      f.write(h)
      if size > 0
        IO.copy_stream(path, f)
        f.write("\0" * (-size % 512))
      end
    end
  end
  true
rescue => e
  warn e.message
  false
end

def package(vcs, rev, destdir, tmp = nil)
  pwd = Dir.pwd
  patchlevel = false
  prerelease = false
  if rev and revision = rev[/@(\h+)\z/, 1]
    rev = $`
  end
  case rev
  when nil
    url = nil
  when /\A(?:master|trunk)\z/
    url = vcs.trunk
  when /\Abranches\//
    url = vcs.branch($')
  when /\Atags\//
    url = vcs.tag($')
  when /\Astable\z/
    vcs.branch_list("ruby_[0-9]*") {|n| url = n[/\Aruby_\d+_\d+\z/]}
    url &&= vcs.branch(url)
  when /\A(.*)\.(.*)\.(.*)-(preview|rc)(\d+)/
    prerelease = true
    tag = "#{$4}#{$5}"
    url = vcs.tag("v#{$1}_#{$2}_#{$3}_#{$4}#{$5}")
  when /\A(.*)\.(.*)\.(.*)-p(\d+)/
    patchlevel = true
    tag = "p#{$4}"
    url = vcs.tag("v#{$1}_#{$2}_#{$3}_#{$4}")
  when /\A(\d+)\.(\d+)(?:\.(\d+))?\z/
    if $3 && ($1 > "2" || $1 == "2" && $2 >= "1")
      patchlevel = true
      tag = ""
      url = vcs.tag("v#{$1}_#{$2}_#{$3}")
    else
      url = vcs.branch("ruby_#{rev.tr('.', '_')}")
    end
  else
    warn "#{$0}: unknown version - #{rev}"
    return
  end
  if !revision and revision = vcs.get_revisions(url)
    url ||= vcs.branch(revision[3])
    revision = revision[1]
  end
  version = nil
  unless revision
    url = vcs.trunk
    vcs.grep(RUBY_VERSION_PATTERN, url, "version.h") {version = $1}
    unless rev == version
      warn "#{$0}: #{rev} not found"
      return
    end
    revision = vcs.get_revisions(url)[1]
  end
  v = nil
  if $exported
    if String === $exported
      v = $exported
    end
  else
    v = "ruby"
    puts "Exporting #{rev}@#{revision}"
    exported = tmp ? File.join(tmp, v) : v
    unless vcs = vcs.export(revision, url, exported, true) {|line| print line}
      warn("Export failed")
      return
    end
    if $srcdir
      Dir.glob($srcdir + "/{tool/config.{guess,sub},gems/*.gem,.downloaded-cache/*,enc/unicode/data/**/*.txt}") do |file|
        puts "copying #{file}"
        dest = exported + file[$srcdir.size..-1]
        FileUtils.mkpath(File.dirname(dest))
        begin
          FileUtils.ln(file, dest, force: true)
          next unless File.symlink?(dest)
          File.unlink(dest)
        rescue SystemCallError
        end
        begin
          FileUtils.cp_r(file, dest, preserve: true)
        rescue SystemCallError
        end
      end
    end
  end

  status = IO.read(File.dirname(__FILE__) + "/prereq.status")
  Dir.chdir(tmp) if tmp

  if !File.directory?(v)
    v = Dir.glob("ruby-*").select(&File.method(:directory?))
    v.size == 1 or abort "#{File.basename $0}: not exported"
    v = v[0]
  end

  open("#{v}/revision.h", "wb") {|f|
    short = vcs.short_revision(revision)
    f.puts "#define RUBY_REVISION #{short.inspect}"
    unless short == revision
      f.puts "#define RUBY_FULL_REVISION #{revision.inspect}"
    end
  }
  version ||= (versionhdr = IO.read("#{v}/version.h"))[RUBY_VERSION_PATTERN, 1]
  version ||=
    begin
      include_ruby_versionhdr = IO.read("#{v}/include/ruby/version.h")
      api_major_version = include_ruby_versionhdr[/^\#define\s+RUBY_API_VERSION_MAJOR\s+([\d.]+)/, 1]
      api_minor_version = include_ruby_versionhdr[/^\#define\s+RUBY_API_VERSION_MINOR\s+([\d.]+)/, 1]
      version_teeny = versionhdr[/^\#define\s+RUBY_VERSION_TEENY\s+(\d+)/, 1]
      [api_major_version, api_minor_version, version_teeny].join('.')
    end
  version or return
  if patchlevel
    unless tag.empty?
      versionhdr ||= IO.read("#{v}/version.h")
      patchlevel = versionhdr[/^\#define\s+RUBY_PATCHLEVEL\s+(\d+)/, 1]
      tag = (patchlevel ? "p#{patchlevel}" : vcs.revision_name(revision))
    end
  elsif prerelease
    versionhdr ||= IO.read("#{v}/version.h")
    versionhdr.sub!(/^\#define\s+RUBY_PATCHLEVEL_STR\s+"\K.+?(?=")/, tag)
    IO.write("#{v}/version.h", versionhdr)
  else
    tag ||= vcs.revision_name(revision)
  end
  unless v == $exported
    if $archname
      n = $archname
    elsif tag.empty?
      n = "ruby-#{version}"
    else
      n = "ruby-#{version}-#{tag}"
    end
    File.directory?(n) or File.rename v, n
    vcs.chdir(File.expand_path(v = n))
  end
  system(*%W"patch -d #{v} -p0 -i #{$patch_file}") if $patch_file
  if !$exported or $patch_file
    colors = %w[red yellow green cyan blue magenta]
    "take a breath, and go ahead".scan(/./) do |c|
      if c == ' '
        print c
      else
        colors.push(color = colors.shift)
        print $colorize.decorate(c, color)
      end
      sleep(c == "," ? 0.7 : 0.05)
    end
    puts
  end
  def (clean = []).add(n) push(n); n end
  Dir.chdir(v) do
    unless File.exist?("ChangeLog")
      vcs.export_changelog(url, nil, revision, "ChangeLog")
    end

    File.open(clean.add("cross.rb"), "w") do |f|
      f.puts "Object.__send__(:remove_const, :CROSS_COMPILING) if defined?(CROSS_COMPILING)"
      f.puts "CROSS_COMPILING=true"
      f.puts "Object.__send__(:remove_const, :RUBY_PLATFORM)"
      f.puts "RUBY_PLATFORM='none'"
      f.puts "Object.__send__(:remove_const, :RUBY_VERSION)"
      f.puts "RUBY_VERSION='#{version}'"
    end
    unless File.exist?("configure")
      print "creating configure..."
      unless system([ENV["AUTOCONF"]]*2)
        puts $colorize.fail(" failed")
        return
      end
      puts $colorize.pass(" done")
    end
    clean.add("autom4te.cache")
    clean.add("enc/unicode/data")
    print "creating prerequisites..."
    if File.file?("common.mk") && /^prereq/ =~ commonmk = IO.read("common.mk")
      puts
      extout = clean.add('tmp')
      begin
        status = IO.read("tool/prereq.status")
      rescue Errno::ENOENT
        # use fallback file
      end
      File.open(clean.add("config.status"), "w") {|f|
        f.print status
      }
      FileUtils.mkpath(hdrdir = "#{extout}/include/ruby")
      File.open("#{hdrdir}/config.h", "w") {}
      FileUtils.mkpath(defaults = "#{extout}/rubygems/defaults")
      File.open("#{defaults}/operating_system.rb", "w") {}
      File.open("#{defaults}/ruby.rb", "w") {}
      miniruby = ENV['MINIRUBY'] + " -I. -I#{extout} -rcross"
      baseruby = ENV["BASERUBY"]
      mk = (IO.read("template/Makefile.in") rescue IO.read("Makefile.in")).
             gsub(/^@.*\n/, '')
      vars = {
        "EXTOUT"=>extout,
        "PATH_SEPARATOR"=>File::PATH_SEPARATOR,
        "MINIRUBY"=>miniruby,
        "RUBY"=>ENV["RUBY"],
        "BASERUBY"=>baseruby,
        "PWD"=>Dir.pwd,
        "ruby_version"=>version,
        "MAJOR"=>api_major_version,
        "MINOR"=>api_minor_version,
        "TEENY"=>version_teeny,
      }
      status.scan(/^s([%,])@([A-Za-z_][A-Za-z_0-9]*)@\1(.*?)\1g$/) do
        vars[$2] ||= $3
      end
      vars.delete("UNICODE_FILES") # for stable branches
      vars["UNICODE_VERSION"] = $unicode_version if $unicode_version
      args = vars.dup
      mk.gsub!(/@([A-Za-z_]\w*)@/) {args.delete($1); vars[$1] || ENV[$1]}
      mk << commonmk.gsub(/\{\$([^(){}]*)[^{}]*\}/, "")
      mk << <<-'APPEND'

prepare-package: touch-unicode-files
prepare-package: prereq update-download clean-cache $(CLEAN_CACHE)
clean-cache $(CLEAN_CACHE): after-update
update-download:: update-gems
after-update:: extract-gems
extract-gems: update-gems
update-gems:
$(UNICODE_SRC_DATA_DIR)/.unicode-tables.time:
touch-unicode-files:
      APPEND
      mk << <<-APPEND
after-update::
\t$(Q) $(RUNRUBY) -C gems -e 'Dir.glob("*") {|f|File.rename(File.readlink(f), f) rescue nil}'
      APPEND
      open(clean.add("Makefile"), "w") do |f|
        f.puts mk
      end
      ENV["CACHE_SAVE"] = "no"
      system(ENV["MAKE"] || ENV["make"] || "make", "prepare-package", *args.map {|arg| arg.join("=")})
      clean.push("rbconfig.rb", ".rbconfig.time", "enc.mk", "ext/ripper/y.output")
      print "prerequisites"
    else
      system(*%W"#{YACC} -o parse.c parse.y")
    end
    vcs.after_export(".") if exported
    FileUtils.rm_rf(clean) unless $keep_temp
    FileUtils.rm_rf(".downloaded-cache")
    if File.exist?("gems/bundled_gems")
      gems = Dir.glob("gems/*.gem")
      gems -= File.readlines("gems/bundled_gems").map {|line|
        name, version, _ = line.split(' ')
        "gems/#{name}-#{version}.gem"
      }
      FileUtils.rm_f(gems)
    else
      FileUtils.rm_rf("gems")
    end
    unless $?.success?
      puts $colorize.fail(" failed")
      return
    end
    puts $colorize.pass(" done")
  end

  if v == "."
    v = File.basename(Dir.pwd)
    Dir.chdir ".."
  else
    Dir.chdir(File.dirname(v))
    v = File.basename(v)
  end

  tarball = nil
  return $packages.collect do |mesg|
    (ext, *cmd) = PACKAGES[mesg]
    File.directory?(destdir) or FileUtils.mkpath(destdir)
    file = File.join(destdir, "#{$archname||v}#{ext}")
    case ext
    when /\.tar/
      if tarball
        next if tarball.empty?
      else
        tarball = "#{$archname||v}.tar"
        print "creating tarball... #{tarball}"
        if tar_create(tarball, v)
          puts $colorize.pass(" done")
        else
          puts $colorize.fail(" failed")
          tarball = ""
          next
        end
      end
      print "creating #{mesg} tarball... #{file}"
      done = system(*cmd, tarball, out: file)
    else
      print "creating #{mesg} archive... #{file}"
      if Hash === cmd.last
        *cmd, opt = *cmd
        cmd << file << v << opt
      else
        (cmd = cmd.dup) << file << v
      end
      done = system(*cmd)
    end
    if done
      puts $colorize.pass(" done")
      file
    else
      puts $colorize.fail(" failed")
      nil
    end
  end.compact
ensure
  FileUtils.rm_rf(tmp ? File.join(tmp, v) : v) if v and !$exported and !$keep_temp
  Dir.chdir(pwd)
end

if [$srcdir, ($svn||=nil), ($git||=nil)].compact.size > 1
  abort "#{File.basename $0}: -srcdir, -svn, and -git are exclusive"
end
if $srcdir
  vcs = VCS.detect($srcdir)
elsif $svn
  vcs = VCS::SVN.new($svn == true ? SVNURL : URI.parse($svn))
elsif $git
  vcs = VCS::GIT.new($git == true ? GITURL : URI.parse($git))
else
  vcs = VCS::SVN.new(SVNURL)
end

success = true
revisions.collect {|rev| package(vcs, rev, destdir, tmp)}.flatten.each do |name|
  if !name
    success = false
    next
  end
  str = open(name, "rb") {|f| f.read}
  if $s3
    %x[aws s3 cp #{name} s3://ftp.r-l.o/pub/#{$s3}/#{Pathname(name).basename}]
    FileUtils.rm_f name
    name = "https://s3.amazonaws.com/ftp.r-l.o/pub/#{$s3}/#{Pathname(name).basename}"
  end
  puts "* #{$colorize.pass(name)}"
  puts "      SIZE:   #{str.bytesize} bytes"
  $digests.each do |alg|
    printf "      %-8s%s\n", "#{alg}:", Digest.const_get(alg).hexdigest(str)
  end
end

exit false if !success

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