Class: RakeCompilerDock::Starter

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

Constant Summary collapse

@@docker_checked =
nil

Class Method Summary collapse

Class Method Details

.check_dockerObject


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# File 'lib/rake_compiler_dock/starter.rb', line 117

def check_docker
  return if @@docker_checked

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

  @@docker_checked = check
end

.exec(*args) ⇒ Object


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# File 'lib/rake_compiler_dock/starter.rb', line 21

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

  check_docker 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

  case RUBY_PLATFORM
  when /mingw|mswin/
    # Change Path from "C:\Path" to "/c/Path" as used by boot2docker
    pwd = Dir.pwd.gsub(/^([a-z]):/i){ "/#{$1.downcase}" }
    # Virtualbox shared folders don't care about file permissions, so we use generic ids.
    uid = 1000
    gid = 1000
  when /darwin/
    pwd = Dir.pwd
    uid = 1000
    gid = 1000
  else
    pwd = Dir.pwd
    # 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 = make_valid_user_name(`id -nu`.chomp)
  group = make_valid_group_name(`id -ng`.chomp)

  drun_args = docker_opts + [image_name] + runargs

  cmd = ["docker", "run",
      "-v", "#{pwd}:#{make_valid_path(pwd)}",
      "-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(pwd),
      *drun_args]

  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

.image_nameObject


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# File 'lib/rake_compiler_dock/starter.rb', line 17

def image_name
  ENV['RCD_IMAGE'] || ENV['RAKE_COMPILER_DOCK_IMAGE'] || "larskanis/rake-compiler-dock:#{IMAGE_VERSION}"
end

.make_valid_group_name(name) ⇒ Object


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# File 'lib/rake_compiler_dock/starter.rb', line 105

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 92

def make_valid_name(name)
  name = name.downcase
  # Convert disallowed characters
  name = name[0..0].gsub(/[^a-z_]/, "_") + name[1..-2].gsub(/[^a-z0-9_-]/, "_") + name[-1..-1].gsub(/[^a-z0-9_$-]/, "_")
  # Limit to 32 characters
  name.sub( /^(.{16}).{2,}(.{15})$/ ){ $1+"-"+$2 }
end

.make_valid_path(name) ⇒ Object


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# File 'lib/rake_compiler_dock/starter.rb', line 110

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 100

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

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


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# File 'lib/rake_compiler_dock/starter.rb', line 10

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 86

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