Class: PDK::Module::Build

Inherits:
Object
  • Object
show all
Defined in:
lib/pdk/module/build.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Build

Returns a new instance of Build.



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# File 'lib/pdk/module/build.rb', line 19

def initialize(options = {})
  @module_dir = File.expand_path(options[:module_dir] || Dir.pwd)
  @target_dir = File.expand_path(options[:'target-dir'] || File.join(module_dir, 'pkg'))
end

Instance Attribute Details

#module_dir ⇒ Object (readonly)

Returns the value of attribute module_dir.



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# File 'lib/pdk/module/build.rb', line 16

def module_dir
  @module_dir
end

#target_dir ⇒ Object (readonly)

Returns the value of attribute target_dir.



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# File 'lib/pdk/module/build.rb', line 17

def target_dir
  @target_dir
end

Class Method Details

.invoke(options = {}) ⇒ Object 



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# File 'lib/pdk/module/build.rb', line 12

def self.invoke(options = {})
  new(options).build
end

Instance Method Details

#build ⇒ String

Build a module package from a module directory.

Returns:

  • (String) —

    The path to the built package file.



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# File 'lib/pdk/module/build.rb', line 40

def build
  create_build_dir

  stage_module_in_build_dir
  build_package

  package_file
ensure
  cleanup_build_dir
end

#build_dir ⇒ Object

Return the path to the temporary build directory, which will be placed inside the target directory and match the release name (see #release_name).



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# File 'lib/pdk/module/build.rb', line 65

def build_dir
  @build_dir ||= File.join(target_dir, release_name)
end

#build_package ⇒ Object

Creates a gzip compressed tarball of the build directory.

If the destination package already exists, it will be removed before creating the new tarball.

Returns:

  • nil.



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# File 'lib/pdk/module/build.rb', line 219

def build_package
  FileUtils.rm_f(package_file)

  Dir.chdir(target_dir) do
    Zlib::GzipWriter.open(package_file) do |package_fd|
      Minitar.pack(release_name, package_fd)
    end
  end
end

#cleanup_build_dir ⇒ Object

Remove the temporary build directory and all its contents from disk.

Returns:

  • nil.



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# File 'lib/pdk/module/build.rb', line 82

def cleanup_build_dir
  FileUtils.rm_rf(build_dir, secure: true)
end

#create_build_dir ⇒ Object

Create a temporary build directory where the files to be included in the package will be staged before building the tarball.

If the directory already exists, remove it first.



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# File 'lib/pdk/module/build.rb', line 73

def create_build_dir
  cleanup_build_dir

  FileUtils.mkdir_p(build_dir)
end

#ignore_file ⇒ String

Select the most appropriate ignore file in the module directory.

In order of preference, we first try ‘.pdkignore`, then `.pmtignore` and finally `.gitignore`.

Returns:

  • (String) —

    The path to the file containing the patterns of file paths to ignore.



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# File 'lib/pdk/module/build.rb', line 236

def ignore_file
  @ignore_file ||= [
    File.join(module_dir, '.pdkignore'),
    File.join(module_dir, '.pmtignore'),
    File.join(module_dir, '.gitignore'),
  ].find { |file| File.file?(file) && File.readable?(file) }
end

#ignored_files ⇒ PathSpec

Instantiate a new PathSpec class and populate it with the pattern(s) of files to be ignored.

Returns:

  • (PathSpec) —

    The populated ignore path matcher.



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# File 'lib/pdk/module/build.rb', line 248

def ignored_files
  @ignored_files ||=
    begin
      ignored = if ignore_file.nil?
                  PathSpec.new
                else
                  fd = File.open(ignore_file, 'rb:UTF-8')
                  data = fd.read
                  fd.close

                  PathSpec.new(data)
                end

      if File.realdirpath(target_dir).start_with?(File.realdirpath(module_dir))
        ignored = ignored.add("\/#{File.basename(target_dir)}\/")
      end

      PDK::Module::DEFAULT_IGNORED.each { |r| ignored.add(r) }

      ignored
    end
end

#ignored_path?(path) ⇒ Boolean

Check if the given path matches one of the patterns listed in the ignore file.

Parameters:

  • path (String) —

    The path to be checked.

Returns:

  • (Boolean) —

    true if the path matches and should be ignored.



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# File 'lib/pdk/module/build.rb', line 139

def ignored_path?(path)
  path = path.to_s + '/' if File.directory?(path)

  !ignored_files.match_paths([path], module_dir).empty?
end

#metadata ⇒ Hash{String => Object}

Read and parse the values from metadata.json for the module that is being built.

Returns:

  • (Hash{String => Object}) —

    The hash of metadata values.



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# File 'lib/pdk/module/build.rb', line 28

def metadata
  @metadata ||= PDK::Module::Metadata.from_file(File.join(module_dir, 'metadata.json')).data
end

#module_pdk_compatible? ⇒ Boolean

Check if the module is PDK Compatible. If not, then prompt the user if they want to run PDK Convert.

Returns:

  • (Boolean) 


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# File 'lib/pdk/module/build.rb', line 59

def module_pdk_compatible?
  ['pdk-version', 'template-url'].any? { |key| metadata.key?(key) }
end

#package_already_exists? ⇒ Boolean

Verify if there is an existing package in the target directory and prompts the user if they want to overwrite it.

Returns:

  • (Boolean) 


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# File 'lib/pdk/module/build.rb', line 53

def package_already_exists?
  File.exist? package_file
end

#package_file ⇒ Object

Return the path where the built package file will be written to.



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# File 'lib/pdk/module/build.rb', line 33

def package_file
  @package_file ||= File.join(target_dir, "#{release_name}.tar.gz")
end

#release_name ⇒ String

Combine the module name and version into a Forge-compatible dash separated string.

Returns:

  • (String) —

    The module name and version, joined by a dash.



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# File 'lib/pdk/module/build.rb', line 90

def release_name
  @release_name ||= [
    metadata['name'],
    metadata['version'],
  ].join('-')
end

#stage_module_in_build_dir ⇒ Object

Iterate through all the files and directories in the module and stage them into the temporary build directory (unless ignored).

Returns:

  • nil



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# File 'lib/pdk/module/build.rb', line 101

def stage_module_in_build_dir
  Find.find(module_dir) do |path|
    next if path == module_dir

    ignored_path?(path) ? Find.prune : stage_path(path)
  end
end

#stage_path(path) ⇒ Object

Stage a file or directory from the module into the build directory.

Parameters:

  • path (String) —

    The path to the file or directory.

Returns:

  • nil.



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# File 'lib/pdk/module/build.rb', line 114

def stage_path(path)
  relative_path = Pathname.new(path).relative_path_from(Pathname.new(module_dir))
  dest_path = File.join(build_dir, relative_path)

  if File.directory?(path)
    FileUtils.mkdir_p(dest_path, mode: File.stat(path).mode)
  elsif File.symlink?(path)
    warn_symlink(path)
  else
    validate_ustar_path!(relative_path.to_path)
    FileUtils.cp(path, dest_path, preserve: true)
  end
rescue ArgumentError => e
  raise PDK::CLI::ExitWithError, _(
    '%{message} Please rename the file or exclude it from the package ' \
    'by adding it to the .pdkignore file in your module.',
  ) % { message: e.message }
end

#validate_ustar_path!(path) ⇒ nil

Checks if the path length will fit into the POSIX.1-1998 (ustar) tar header format.

POSIX.1-2001 (which allows paths of infinite length) was adopted by GNU tar in 2004 and is supported by minitar 0.7 and above. Unfortunately much of the Puppet ecosystem still uses minitar 0.6.1.

POSIX.1-1998 tar format does not allow for paths greater than 256 bytes, or paths that can’t be split into a prefix of 155 bytes (max) and a suffix of 100 bytes (max).

This logic was pretty much copied from the private method Archive::Tar::Minitar::Writer#split_name.

Parameters:

  • path (String) —

    the relative path to be added to the tar file.

Returns:

  • (nil)

Raises:

  • (ArgumentError) —

    if the path is too long or could not be split.



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# File 'lib/pdk/module/build.rb', line 180

def validate_ustar_path!(path)
  if path.bytesize > 256
    raise ArgumentError, _("The path '%{path}' is longer than 256 bytes.") % {
      path: path,
    }
  end

  if path.bytesize <= 100
    prefix = ''
  else
    parts = path.split(File::SEPARATOR)
    newpath = parts.pop
    nxt = ''

    loop do
      nxt = parts.pop || ''
      break if newpath.bytesize + 1 + nxt.bytesize >= 100
      newpath = File.join(nxt, newpath)
    end

    prefix = File.join(*parts, nxt)
    path = newpath
  end

  return unless path.bytesize > 100 || prefix.bytesize > 155

  raise ArgumentError, _(
    "'%{path}' could not be split at a directory separator into two " \
    'parts, the first having a maximum length of 155 bytes and the ' \
    'second having a maximum length of 100 bytes.',
  ) % { path: path }
end

#warn_symlink(path) ⇒ Object

Warn the user about a symlink that would have been included in the built package.

Parameters:

  • path (String) —

    The relative or absolute path to the symlink.

Returns:

  • nil.



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# File 'lib/pdk/module/build.rb', line 151

def warn_symlink(path)
  symlink_path = Pathname.new(path)
  module_path = Pathname.new(module_dir)

  PDK.logger.warn _('Symlinks in modules are not supported and will not be included in the package. Please investigate symlink %{from} -> %{to}.') % {
    from: symlink_path.relative_path_from(module_path),
    to:   symlink_path.realpath.relative_path_from(module_path),
  }
end