Class: Requirement Private

Inherits:
Object
  • Object
show all
Extended by:
BuildEnvironment::DSL
Includes:
Dependable
Defined in:
Library/Homebrew/requirement.rb

Overview

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

A base class for non-formula requirements needed by formulae. A fatal requirement is one that will fail the build if it is not present. By default, requirements are non-fatal.

Constant Summary

Constants included from Dependable

Dependable::RESERVED_TAGS

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Dependable

#build?, #option_tags, #optional?, #options, #prune_from_option?, #prune_if_build_and_not_dependent?, #recommended?, #required?, #test?

Constructor Details

#initialize(tags = []) ⇒ Requirement

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 a new instance of Requirement.


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# File 'Library/Homebrew/requirement.rb', line 19

def initialize(tags = [])
  @cask = self.class.cask
  @download = self.class.download
  tags.each do |tag|
    next unless tag.is_a? Hash

    @cask ||= tag[:cask]
    @download ||= tag[:download]
  end
  @tags = tags
  @tags << :build if self.class.build
  @name ||= infer_name
end

Class Attribute Details

.build ⇒ Object (readonly)

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/requirement.rb', line 160

def build
  @build
end

.env_proc ⇒ Object (readonly)

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/requirement.rb', line 160

def env_proc
  @env_proc
end

Instance Attribute Details

#cask ⇒ Object (readonly)

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/requirement.rb', line 17

def cask
  @cask
end

#download ⇒ Object (readonly)

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/requirement.rb', line 17

def download
  @download
end

#name ⇒ Object (readonly)

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/requirement.rb', line 17

def name
  @name
end

#tags ⇒ Object (readonly)

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/requirement.rb', line 17

def tags
  @tags
end

Class Method Details

.env(*settings, &block) ⇒ 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/requirement.rb', line 171

def env(*settings, &block)
  if block_given?
    @env_proc = block
  else
    super
  end
end

.expand(dependent, &block) ⇒ 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.

Expand the requirements of dependent recursively, optionally yielding [dependent, req] pairs to allow callers to apply arbitrary filters to the list. The default filter, which is applied when a block is not given, omits optionals and recommendeds based on what the dependent has asked for.


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# File 'Library/Homebrew/requirement.rb', line 216

def expand(dependent, &block)
  reqs = Requirements.new

  formulae = dependent.recursive_dependencies.map(&:to_formula)
  formulae.unshift(dependent)

  formulae.each do |f|
    f.requirements.each do |req|
      next if prune?(f, req, &block)

      reqs << req
    end
  end

  reqs
end

.prune ⇒ 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.

Used to prune requirements when calling expand with a block.


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# File 'Library/Homebrew/requirement.rb', line 244

def prune
  throw(:prune, true)
end

.prune?(dependent, req, &_block) ⇒ 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/requirement.rb', line 233

def prune?(dependent, req, &_block)
  catch(:prune) do
    if block_given?
      yield dependent, req
    elsif req.optional? || req.recommended?
      prune unless dependent.build.with?(req)
    end
  end
end

.satisfy(options = nil, &block) ⇒ 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/requirement.rb', line 164

def satisfy(options = nil, &block)
  return @satisfied if options.nil? && !block_given?

  options = {} if options.nil?
  @satisfied = Satisfier.new(options, &block)
end

Instance Method Details

#==(other) ⇒ Object Also known as: eql?

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/requirement.rb', line 115

def ==(other)
  instance_of?(other.class) && name == other.name && tags == other.tags
end

#display_s ⇒ 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/requirement.rb', line 128

def display_s
  name.capitalize
end

#env ⇒ 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/requirement.rb', line 107

def env
  self.class.env
end

#env_proc ⇒ 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/requirement.rb', line 111

def env_proc
  self.class.env_proc
end

#fatal? ⇒ 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.

Overriding #fatal? is unsupported. Pass a boolean to the fatal DSL method instead.

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/requirement.rb', line 74

def fatal?
  self.class.fatal || false
end

#hash ⇒ 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/requirement.rb', line 120

def hash
  name.hash ^ tags.hash
end

#inspect ⇒ 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/requirement.rb', line 124

def inspect
  "#<#{self.class.name}: #{tags.inspect}>"
end

#message ⇒ 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.

The message to show when the requirement is not met.


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# File 'Library/Homebrew/requirement.rb', line 38

def message
  _, _, class_name = self.class.to_s.rpartition "::"
  s = "#{class_name} unsatisfied!\n"
  if cask
    s += <<~EOS
      You can install with Homebrew Cask:
        brew cask install #{cask}
    EOS
  end

  if download
    s += <<~EOS
      You can download from:
        #{Formatter.url(download)}
    EOS
  end
  s
end

#mktemp(&block) ⇒ 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/requirement.rb', line 132

def mktemp(&block)
  Mktemp.new(name).run(&block)
end

#modify_build_environment(env: nil, cc: nil, build_bottle: false, bottle_arch: 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.

Overriding #modify_build_environment is unsupported. Pass a block to the env DSL method instead.


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# File 'Library/Homebrew/requirement.rb', line 90

def modify_build_environment(env: nil, cc: nil, build_bottle: false, bottle_arch: nil)
  satisfied?(env: env, cc: cc, build_bottle: build_bottle, bottle_arch: bottle_arch)
  instance_eval(&env_proc) if env_proc

  # XXX If the satisfy block returns a Pathname, then make sure that it
  # remains available on the PATH. This makes requirements like
  #   satisfy { which("executable") }
  # work, even under superenv where "executable" wouldn't normally be on the
  # PATH.
  parent = satisfied_result_parent
  return unless parent
  return if ["#{HOMEBREW_PREFIX}/bin", "#{HOMEBREW_PREFIX}/bin"].include?(parent.to_s)
  return if PATH.new(ENV["PATH"]).include?(parent.to_s)

  ENV.prepend_path("PATH", parent)
end

#option_names ⇒ 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/requirement.rb', line 33

def option_names
  [name]
end

#satisfied?(env: nil, cc: nil, build_bottle: false, bottle_arch: nil) ⇒ 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.

Overriding #satisfied? is unsupported. Pass a block or boolean to the satisfy DSL method instead.

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/requirement.rb', line 59

def satisfied?(env: nil, cc: nil, build_bottle: false, bottle_arch: nil)
  satisfy = self.class.satisfy
  return true unless satisfy

  @satisfied_result =
    satisfy.yielder(env: env, cc: cc, build_bottle: build_bottle, bottle_arch: bottle_arch) do |p|
      instance_eval(&p)
    end
  return false unless @satisfied_result

  true
end

#satisfied_result_parent ⇒ 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/requirement.rb', line 78

def satisfied_result_parent
  return unless @satisfied_result.is_a?(Pathname)

  parent = @satisfied_result.resolved_path.parent
  if parent.to_s =~ %r{^#{Regexp.escape(HOMEBREW_CELLAR)}/([\[email protected]]+)/[^/]+/(s?bin)/?$}
    parent = HOMEBREW_PREFIX/"opt/#{Regexp.last_match(1)}/#{Regexp.last_match(2)}"
  end
  parent
end