Module: Formulary Private

Extended by:
Cachable
Defined in:
Library/Homebrew/formulary.rb

Overview

This module is part of a private API. You should avoid using this module if possible, as it may be removed or be changed in the future.

The Formulary is responsible for creating instances of Formula. It is not meant to be used directly from formulae.

Defined Under Namespace

Classes: AliasLoader, BottleLoader, FormulaContentsLoader, FormulaLoader, FromPathLoader, FromUrlLoader, NullLoader, TapLoader

Constant Summary collapse

URL_START_REGEX =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

%r{(https?|ftp|file)://}.freeze

Class Method Summary collapse

Methods included from Cachable

cache, clear_cache

Class Method Details

.canonical_name(ref) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 


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# File 'Library/Homebrew/formulary.rb', line 426

def self.canonical_name(ref)
  loader_for(ref).name
rescue TapFormulaAmbiguityError
  # If there are multiple tap formulae with the name of ref,
  # then ref is the canonical name
  ref.downcase
end

.class_s(name) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 


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# File 'Library/Homebrew/formulary.rb', line 105

def self.class_s(name)
  class_name = name.capitalize
  class_name.gsub!(/[-_.\s]([a-zA-Z0-9])/) { Regexp.last_match(1).upcase }
  class_name.tr!("+", "x")
  class_name.sub!(/(.)@(\d)/, "\\1AT\\2")
  class_name
end

.core_path(name) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 


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# File 'Library/Homebrew/formulary.rb', line 492

def self.core_path(name)
  CoreTap.instance.formula_dir/"#{name.to_s.downcase}.rb"
end

.enable_factory_cache! ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 


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# File 'Library/Homebrew/formulary.rb', line 16

def self.enable_factory_cache!
  @factory_cache = true
end

.ensure_utf8_encoding(io) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 


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# File 'Library/Homebrew/formulary.rb', line 101

def self.ensure_utf8_encoding(io)
  io.set_encoding(Encoding::UTF_8)
end

.factory(ref, spec = :stable, alias_path: nil, from: nil, force_bottle: false, flags: []) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Return a Formula instance for the given reference. ref is a string containing:

  • a formula name
  • a formula pathname
  • a formula URL
  • a local bottle reference

Raises:

  • (ArgumentError) 

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# File 'Library/Homebrew/formulary.rb', line 338

def self.factory(ref, spec = :stable, alias_path: nil, from: nil, force_bottle: false, flags: [])
  raise ArgumentError, "Formulae must have a ref!" unless ref

  cache_key = "#{ref}-#{spec}-#{alias_path}-#{from}"
  if factory_cached? && cache[:formulary_factory] &&
     cache[:formulary_factory][cache_key]
    return cache[:formulary_factory][cache_key]
  end

  formula = loader_for(ref, from: from).get_formula(spec, alias_path: alias_path,
                                                    force_bottle: force_bottle, flags: flags)
  if factory_cached?
    cache[:formulary_factory] ||= {}
    cache[:formulary_factory][cache_key] ||= formula
  end
  formula
end

.factory_cached? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/formulary.rb', line 20

def self.factory_cached?
  !@factory_cache.nil?
end

.formula_class_defined?(path) ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/formulary.rb', line 24

def self.formula_class_defined?(path)
  cache.key?(path)
end

.formula_class_get(path) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 


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# File 'Library/Homebrew/formulary.rb', line 28

def self.formula_class_get(path)
  cache.fetch(path)
end

.from_contents(name, path, contents, spec = :stable, alias_path: nil, force_bottle: false, flags: []) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Return a Formula instance directly from contents


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# File 'Library/Homebrew/formulary.rb', line 408

def self.from_contents(name, path, contents, spec = :stable, alias_path: nil, force_bottle: false, flags: [])
  FormulaContentsLoader.new(name, path, contents)
                       .get_formula(spec, alias_path: alias_path, force_bottle: force_bottle, flags: flags)
end

.from_keg(keg, spec = nil, alias_path: nil, force_bottle: false, flags: []) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Return a Formula instance for the given keg. It will auto resolve formula's spec when requested spec is nil


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# File 'Library/Homebrew/formulary.rb', line 383

def self.from_keg(keg, spec = nil, alias_path: nil, force_bottle: false, flags: [])
  tab = Tab.for_keg(keg)
  tap = tab.tap
  spec ||= tab.spec

  f = if tap.nil?
    factory(keg.rack.basename.to_s, spec, alias_path: alias_path, from: :keg,
            force_bottle: force_bottle, flags: flags)
  else
    begin
      factory("#{tap}/#{keg.rack.basename}", spec, alias_path: alias_path, from: :keg,
              force_bottle: force_bottle, flags: flags)
    rescue FormulaUnavailableError
      # formula may be migrated to different tap. Try to search in core and all taps.
      factory(keg.rack.basename.to_s, spec, alias_path: alias_path, from: :keg,
              force_bottle: force_bottle, flags: flags)
    end
  end
  f.build = tab
  f.build.used_options = Tab.remap_deprecated_options(f.deprecated_options, tab.used_options).as_flags
  f.version.update_commit(keg.version.version.commit) if f.head? && keg.version.head?
  f
end

.from_rack(rack, spec = nil, alias_path: nil, force_bottle: false, flags: []) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Return a Formula instance for the given rack. It will auto resolve formula's spec when requested spec is nil

The :alias_path option will be used if the formula is found not to be installed, and discarded if it is installed because the alias_path used to install the formula will be set instead.


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# File 'Library/Homebrew/formulary.rb', line 362

def self.from_rack(rack, spec = nil, alias_path: nil, force_bottle: false, flags: [])
  kegs = rack.directory? ? rack.subdirs.map { |d| Keg.new(d) } : []
  keg = kegs.find(&:linked?) || kegs.find(&:optlinked?) || kegs.max_by(&:version)

  if keg
    from_keg(keg, spec, alias_path: alias_path)
  else
    factory(rack.basename.to_s, spec || :stable, alias_path: alias_path, from: :rack,
            force_bottle: force_bottle, flags: flags)
  end
end

.keg_only?(rack) ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Return whether given rack is keg-only

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/formulary.rb', line 375

def self.keg_only?(rack)
  Formulary.from_rack(rack).keg_only?
rescue FormulaUnavailableError, TapFormulaAmbiguityError, TapFormulaWithOldnameAmbiguityError
  false
end

.load_formula(name, path, contents, namespace, flags:) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 


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# File 'Library/Homebrew/formulary.rb', line 32

def self.load_formula(name, path, contents, namespace, flags:)
  raise "Formula loading disabled by HOMEBREW_DISABLE_LOAD_FORMULA!" if Homebrew::EnvConfig.disable_load_formula?

  require "formula"

  mod = Module.new
  const_set(namespace, mod)

  begin
    # Set `BUILD_FLAGS` in the formula's namespace so we can
    # access them from within the formula's class scope.
    mod.const_set(:BUILD_FLAGS, flags)
    mod.module_eval(contents, path)
  rescue NameError, ArgumentError, ScriptError => e
    $stderr.puts e.backtrace if Homebrew::EnvConfig.developer?
    raise FormulaUnreadableError.new(name, e)
  end
  class_name = class_s(name)

  begin
    mod.const_get(class_name)
  rescue NameError => e
    class_list = mod.constants
                    .map { |const_name| mod.const_get(const_name) }
                    .select { |const| const.is_a?(Class) }
    new_exception = FormulaClassUnavailableError.new(name, path, class_name, class_list)
    raise new_exception, "", e.backtrace
  end
end

.load_formula_from_path(name, path, flags:) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 


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# File 'Library/Homebrew/formulary.rb', line 62

def self.load_formula_from_path(name, path, flags:)
  contents = path.open("r") { |f| ensure_utf8_encoding(f).read }
  namespace = "FormulaNamespace#{Digest::MD5.hexdigest(path.to_s)}"
  klass = load_formula(name, path, contents, namespace, flags: flags)
  cache[path] = klass
end

.loader_for(ref, from: nil) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Raises:


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# File 'Library/Homebrew/formulary.rb', line 438

def self.loader_for(ref, from: nil)
  case ref
  when Pathname::BOTTLE_EXTNAME_RX
    return BottleLoader.new(ref)
  when URL_START_REGEX
    return FromUrlLoader.new(ref)
  when HOMEBREW_TAP_FORMULA_REGEX
    return TapLoader.new(ref, from: from)
  end

  return FromPathLoader.new(ref) if File.extname(ref) == ".rb" && Pathname.new(ref).expand_path.exist?

  formula_with_that_name = core_path(ref)
  return FormulaLoader.new(ref, formula_with_that_name) if formula_with_that_name.file?

  possible_alias = CoreTap.instance.alias_dir/ref
  return AliasLoader.new(possible_alias) if possible_alias.file?

  possible_tap_formulae = tap_paths(ref)
  raise TapFormulaAmbiguityError.new(ref, possible_tap_formulae) if possible_tap_formulae.size > 1

  if possible_tap_formulae.size == 1
    path = possible_tap_formulae.first.resolved_path
    name = path.basename(".rb").to_s
    return FormulaLoader.new(name, path)
  end

  if newref = CoreTap.instance.formula_renames[ref]
    formula_with_that_oldname = core_path(newref)
    return FormulaLoader.new(newref, formula_with_that_oldname) if formula_with_that_oldname.file?
  end

  possible_tap_newname_formulae = []
  Tap.each do |tap|
    if newref = tap.formula_renames[ref]
      possible_tap_newname_formulae << "#{tap.name}/#{newref}"
    end
  end

  if possible_tap_newname_formulae.size > 1
    raise TapFormulaWithOldnameAmbiguityError.new(ref, possible_tap_newname_formulae)
  end

  return TapLoader.new(possible_tap_newname_formulae.first, from: from) unless possible_tap_newname_formulae.empty?

  possible_keg_formula = Pathname.new("#{HOMEBREW_PREFIX}/opt/#{ref}/.brew/#{ref}.rb")
  return FormulaLoader.new(ref, possible_keg_formula) if possible_keg_formula.file?

  possible_cached_formula = Pathname.new("#{HOMEBREW_CACHE_FORMULA}/#{ref}.rb")
  return FormulaLoader.new(ref, possible_cached_formula) if possible_cached_formula.file?

  NullLoader.new(ref)
end

.path(ref) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 


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# File 'Library/Homebrew/formulary.rb', line 434

def self.path(ref)
  loader_for(ref).path
end

.resolve(name, spec: nil, force_bottle: false, flags: []) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 


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# File 'Library/Homebrew/formulary.rb', line 69

def self.resolve(name, spec: nil, force_bottle: false, flags: [])
  if name.include?("/") || File.exist?(name)
    f = factory(name, *spec, force_bottle: force_bottle, flags: flags)
    if f.any_version_installed?
      tab = Tab.for_formula(f)
      resolved_spec = spec || tab.spec
      f.active_spec = resolved_spec if f.send(resolved_spec)
      f.build = tab
      if f.head? && tab.tabfile
        k = Keg.new(tab.tabfile.parent)
        f.version.update_commit(k.version.version.commit) if k.version.head?
      end
    end
  else
    rack = to_rack(name)
    alias_path = factory(name, force_bottle: force_bottle, flags: flags).alias_path
    f = from_rack(rack, *spec, alias_path: alias_path, force_bottle: force_bottle, flags: flags)
  end

  # If this formula was installed with an alias that has since changed,
  # then it was specified explicitly in ARGV. (Using the alias would
  # instead have found the new formula.)
  #
  # Because of this, the user is referring to this specific formula,
  # not any formula targeted by the same alias, so in this context
  # the formula shouldn't be considered outdated if the alias used to
  # install it has changed.
  f.follow_installed_alias = false

  f
end

.tap_paths(name, taps = Dir[HOMEBREW_LIBRARY/"Taps/*/*/"]) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 


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# File 'Library/Homebrew/formulary.rb', line 496

def self.tap_paths(name, taps = Dir[HOMEBREW_LIBRARY/"Taps/*/*/"])
  name = name.to_s.downcase
  taps.map do |tap|
    Pathname.glob([
                    "#{tap}Formula/#{name}.rb",
                    "#{tap}HomebrewFormula/#{name}.rb",
                    "#{tap}#{name}.rb",
                    "#{tap}Aliases/#{name}",
                  ]).find(&:file?)
  end.compact
end

.to_rack(ref) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 


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# File 'Library/Homebrew/formulary.rb', line 413

def self.to_rack(ref)
  # If using a fully-scoped reference, check if the formula can be resolved.
  factory(ref) if ref.include? "/"

  # Check whether the rack with the given name exists.
  if (rack = HOMEBREW_CELLAR/File.basename(ref, ".rb")).directory?
    return rack.resolved_path
  end

  # Use canonical name to locate rack.
  (HOMEBREW_CELLAR/canonical_name(ref)).resolved_path
end