Class: RakeCompilerDock::Starter

Inherits:
Object
  • Object
show all
Defined in:
lib/rake_compiler_dock/starter.rb

Constant Summary collapse

@@docker_checked = 
{}

Class Method Summary collapse

Class Method Details

.check_docker(pwd) ⇒ Object 



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# File 'lib/rake_compiler_dock/starter.rb', line 135

def check_docker(pwd)
  return if @@docker_checked[pwd]

  check = DockerCheck.new($stderr, pwd)
  unless check.ok?
    at_exit do
      check.print_help_text
    end
    raise DockerIsNotAvailable, "Docker is not available"
  end

  @@docker_checked[pwd] = check
end

.current_group ⇒ Object 



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# File 'lib/rake_compiler_dock/starter.rb', line 99

def current_group
  group_obj = Etc.getgrgid rescue nil
  make_valid_group_name(group_obj ? group_obj.name : "dummygroup")
end

.current_user ⇒ Object 



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# File 'lib/rake_compiler_dock/starter.rb', line 95

def current_user
  make_valid_user_name(Etc.getlogin)
end

.exec(*args) ⇒ Object 



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# File 'lib/rake_compiler_dock/starter.rb', line 18

def exec(*args)
  options = (Hash === args.last) ? args.pop : {}
  runargs = args.dup

  mountdir = options.fetch(:mountdir){ ENV['RCD_MOUNTDIR'] || Dir.pwd }
  workdir = options.fetch(:workdir){ ENV['RCD_WORKDIR'] || Dir.pwd }
  case RUBY_PLATFORM
  when /mingw|mswin/
    mountdir = sanitize_windows_path(mountdir)
    workdir = sanitize_windows_path(workdir)
    # Virtualbox shared folders don't care about file permissions, so we use generic ids.
    uid = 1000
    gid = 1000
  when /darwin/
    uid = 1000
    gid = 1000
  else
    # Docker mounted volumes also share file uid/gid and permissions with the host.
    # Therefore we use the same attributes inside and outside the container.
    uid = Process.uid
    gid = Process.gid
  end
  user = options.fetch(:username){ current_user }
  group = options.fetch(:groupname){ current_group }
  rubyvm = options.fetch(:rubyvm){ ENV['RCD_RUBYVM'] } || "mri"
  image_name = options.fetch(:image) do
    ENV['RCD_IMAGE'] ||
        ENV['RAKE_COMPILER_DOCK_IMAGE'] ||
        "larskanis/rake-compiler-dock-#{rubyvm}:#{IMAGE_VERSION}"
  end

  check_docker(mountdir) if options.fetch(:check_docker){ true }
  runargs.unshift("sigfw") if options.fetch(:sigfw){ true }
  runargs.unshift("runas") if options.fetch(:runas){ true }
  docker_opts = options.fetch(:options) do
    opts = ["--rm", "-i"]
    opts << "-t" if $stdin.tty?
    opts
  end

  cmd = ["docker", "run",
      "-v", "#{mountdir}:#{make_valid_path(mountdir)}",
      "-e", "UID=#{uid}",
      "-e", "GID=#{gid}",
      "-e", "USER=#{user}",
      "-e", "GROUP=#{group}",
      "-e", "ftp_proxy=#{ENV['ftp_proxy']}",
      "-e", "http_proxy=#{ENV['http_proxy']}",
      "-e", "https_proxy=#{ENV['https_proxy']}",
      "-e", "RCD_HOST_RUBY_PLATFORM=#{RUBY_PLATFORM}",
      "-e", "RCD_HOST_RUBY_VERSION=#{RUBY_VERSION}",
      "-e", "RCD_IMAGE=#{image_name}",
      "-w", make_valid_path(workdir),
      *docker_opts,
      image_name,
      *runargs]

  cmdline = Shellwords.join(cmd)
  if verbose_flag(options) == true
    $stderr.puts cmdline
  end

  ok = system(*cmd)
  if block_given?
    yield(ok, $?)
  elsif !ok
    fail "Command failed with status (#{$?.exitstatus}): " +
    "[#{cmdline}]"
  end
end

.make_valid_group_name(name) ⇒ Object 



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# File 'lib/rake_compiler_dock/starter.rb', line 123

def make_valid_group_name(name)
  name = make_valid_name(name)
  PredefinedGroups.include?(name) ? make_valid_name("_#{name}") : name
end

.make_valid_name(name) ⇒ Object 



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# File 'lib/rake_compiler_dock/starter.rb', line 104

def make_valid_name(name)
  name = name.to_s.downcase
  name = "_" if name.empty?
  # Convert disallowed characters
  if name.length > 1
    name = name[0..0].gsub(/[^a-z_]/, "_") + name[1..-2].to_s.gsub(/[^a-z0-9_-]/, "_") + name[-1..-1].to_s.gsub(/[^a-z0-9_$-]/, "_")
  else
    name = name.gsub(/[^a-z_]/, "_")
  end

  # Limit to 32 characters
  name.sub( /^(.{16}).{2,}(.{15})$/ ){ $1+"-"+$2 }
end

.make_valid_path(name) ⇒ Object 



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# File 'lib/rake_compiler_dock/starter.rb', line 128

def make_valid_path(name)
  # Convert problematic characters
  name = name.gsub(/[ ]/i, "_")
end

.make_valid_user_name(name) ⇒ Object 



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# File 'lib/rake_compiler_dock/starter.rb', line 118

def make_valid_user_name(name)
  name = make_valid_name(name)
  PredefinedUsers.include?(name) ? make_valid_name("_#{name}") : name
end

.sanitize_windows_path(path) ⇒ Object

Change Path from “C:Path” to “/c/Path” as used by boot2docker



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# File 'lib/rake_compiler_dock/starter.rb', line 150

def sanitize_windows_path(path)
  path.gsub(/^([a-z]):/i){ "/#{$1.downcase}" }
end

.sh(cmd, options = {}, &block) ⇒ Object 



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# File 'lib/rake_compiler_dock/starter.rb', line 11

def sh(cmd, options={}, &block)
  if verbose_flag(options)
    $stderr.puts "rake-compiler-dock bash -c #{ cmd.inspect }"
  end
  exec('bash', '-c', cmd, options, &block)
end

.verbose_flag(options) ⇒ Object 



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# File 'lib/rake_compiler_dock/starter.rb', line 89

def verbose_flag(options)
  options.fetch(:verbose) do
    Object.const_defined?(:Rake) && Rake.const_defined?(:FileUtilsExt) ? Rake::FileUtilsExt.verbose_flag : false
  end
end