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specification.rb
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specification.rb
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require 'cocoapods-core/specification/consumer'
require 'cocoapods-core/specification/dsl'
require 'cocoapods-core/specification/linter'
require 'cocoapods-core/specification/root_attribute_accessors'
require 'cocoapods-core/specification/set'
require 'cocoapods-core/specification/json'
module Pod
# The Specification provides a DSL to describe a Pod. A pod is defined as a
# library originating from a source. A specification can support detailed
# attributes for modules of code through subspecs.
#
# Usually it is stored in files with `podspec` extension.
#
class Specification
include Pod::Specification::DSL
include Pod::Specification::DSL::Deprecations
include Pod::Specification::RootAttributesAccessors
include Pod::Specification::JSONSupport
# @return [Specification] the parent of the specification unless the
# specification is a root.
#
attr_reader :parent
# @param [Specification] parent @see parent
#
# @param [String] name
# the name of the specification.
#
def initialize(parent = nil, name = nil)
@attributes_hash = {}
@subspecs = []
@consumers = {}
@parent = parent
attributes_hash['name'] = name
yield self if block_given?
end
# @return [Hash] the hash that stores the information of the attributes of
# the specification.
#
attr_accessor :attributes_hash
# @return [Array<Specification>] The subspecs of the specification.
#
attr_accessor :subspecs
# Checks if a specification is equal to the given one according its name
# and to its version.
#
# @param [Specification] other
# the specification to compare with.
#
# @todo Not sure if comparing only the name and the version is the way to
# go. This is used by the installer to group specifications by root
# spec.
#
# @return [Bool] Whether the specifications are equal.
#
def ==(other)
# TODO
# self.class === other &&
# attributes_hash == other.attributes_hash &&
# subspecs == other.subspecs &&
# pre_install_callback == other.pre_install_callback &&
# post_install_callback == other.post_install_callback
to_s == other.to_s
end
# @see ==
#
def eql?(other)
self == other
end
# Return the hash value for this specification according to its attributes
# hash.
#
# @note This function must have the property that a.eql?(b) implies
# a.hash == b.hash.
#
# @note This method is used by the Hash class.
#
# @return [Fixnum] The hash value.
#
def hash
to_s.hash
end
# @return [String] A string suitable for representing the specification in
# clients.
#
def to_s
if name && !version.version.empty?
"#{name} (#{version})"
elsif name
name
else
'No-name'
end
end
# @return [String] A string suitable for debugging.
#
def inspect
"#<#{self.class.name} name=#{name.inspect}>"
end
# @param [String] string_representation
# the string that describes a {Specification} generated from
# {Specification#to_s}.
#
# @example Input examples
#
# "libPusher (1.0)"
# "libPusher (HEAD based on 1.0)"
# "RestKit/JSON (1.0)"
#
# @return [Array<String, Version>] the name and the version of a
# pod.
#
def self.name_and_version_from_string(string_representation)
match_data = string_representation.match(/(\S*) \((.*)\)/)
unless match_data
raise Informative, "Invalid string representation for a " \
"Specification: `#{string_representation}`." \
"String representation should include the name and " \
"the version of a pod."
end
name = match_data[1]
vers = Version.new(match_data[2])
[name, vers]
end
# Returns the root name of a specification.
#
# @param [String] the name of a specification or of a subspec.
#
# @return [String] the root name
#
def self.root_name(full_name)
full_name.split('/').first
end
#-------------------------------------------------------------------------#
public
# @!group Hierarchy
# @return [Specification] The root specification or itself if it is root.
#
def root
parent ? parent.root : self
end
# @return [Bool] whether the specification is root.
#
def root?
parent.nil?
end
# @return [Bool] whether the specification is a subspec.
#
def subspec?
!parent.nil?
end
#-------------------------------------------------------------------------#
public
# @!group Dependencies & Subspecs
# @return [Array<Specifications>] the recursive list of all the subspecs of
# a specification.
#
def recursive_subspecs
mapper = lambda do |spec|
spec.subspecs.map do |subspec|
[subspec, *mapper.call(subspec)]
end.flatten
end
mapper.call(self)
end
# Returns the subspec with the given name or the receiver if the name is
# nil or equal to the name of the receiver.
#
# @param [String] relative_name
# the relative name of the subspecs starting from the receiver
# including the name of the receiver.
#
# @example Retrieving a subspec
#
# s.subspec_by_name('Pod/subspec').name #=> 'subspec'
#
# @return [Specification] the subspec with the given name or self.
#
def subspec_by_name(relative_name)
if relative_name.nil? || relative_name == base_name
self
else
remainder = relative_name[base_name.size + 1..-1]
subspec_name = remainder.split('/').shift
subspec = subspecs.find { |s| s.base_name == subspec_name }
unless subspec
raise Informative, "Unable to find a specification named " \
"`#{relative_name}` in `#{name} (#{version})`."
end
subspec.subspec_by_name(remainder)
end
end
# @return [Array] the name of the default subspecs if provided.
#
def default_subspecs
attributes_hash['default_subspecs']
end
# Returns the dependencies on subspecs.
#
# @note A specification has a dependency on either the
# {#default_subspecs} or each of its children subspecs that are
# compatible with its platform.
#
# @return [Array<Dependency>] the dependencies on subspecs.
#
def subspec_dependencies(platform = nil)
if default_subspecs
specs = default_subspecs.map do |subspec_name|
root.subspec_by_name("#{name}/#{subspec_name}")
end
else
specs = subspecs.compact
end
if platform
specs = specs.select { |s| s.supported_on_platform?(platform) }
end
specs.map { |s| Dependency.new(s.name) }
end
# Returns the dependencies on other Pods or subspecs of other Pods.
#
# @param [Bool] all_platforms
# whether the dependencies should be returned for all platforms
# instead of the active one.
#
# @note External dependencies are inherited by subspecs
#
# @return [Array<Dependency>] the dependencies on other Pods.
#
def dependencies(platform = nil)
if platform
consumer(platform).dependencies || []
else
available_platforms.map do |spec_platform|
consumer(spec_platform).dependencies
end.flatten.uniq
end
end
# @return [Array<Dependency>] all the dependencies of the specification.
#
def all_dependencies(platform = nil)
dependencies(platform) + subspec_dependencies(platform)
end
# Returns a consumer to access the multi-platform attributes.
#
# @param [String, Symbol, Platform] platform
# he platform of the consumer
#
# @return [Specification::Consumer] the consumer for the given platform
#
def consumer(platform)
platform = platform.to_sym
@consumers[platform] ||= Consumer.new(self, platform)
end
#-------------------------------------------------------------------------#
public
# @!group DSL helpers
# @return [Bool] whether the specification should use a directory as it
# source.
#
def local?
return true if source[:path]
return true if source[:local]
false
end
# @return [Bool] whether the specification is supported in the given
# platform.
#
# @overload supported_on_platform?(platform)
#
# @param [Platform] platform
# the platform which is checked for support.
#
# @overload supported_on_platform?(symbolic_name, deployment_target)
#
# @param [Symbol] symbolic_name
# the name of the platform which is checked for support.
#
# @param [String] deployment_target
# the deployment target which is checked for support.
#
def supported_on_platform?(*platform)
platform = Platform.new(*platform)
available_platforms.any? { |available| platform.supports?(available) }
end
# @return [Array<Platform>] The platforms that the Pod is supported on.
#
# @note If no platform is specified, this method returns all known
# platforms.
#
def available_platforms
names = supported_platform_names
names = PLATFORMS if names.empty?
names.map { |name| Platform.new(name, deployment_target(name)) }
end
# Returns the deployment target for the specified platform.
#
# @param [String] platform_name
# the symbolic name of the platform.
#
# @return [String] the deployment target
# @return [Nil] if not deployment target was specified for the platform.
#
def deployment_target(platform_name)
result = platform_hash[platform_name.to_s]
result ||= parent.deployment_target(platform_name) if parent
result
end
protected
# @return [Array[Symbol]] the symbolic name of the platform in which the
# specification is supported.
#
# @return [Nil] if the specification is supported on all the known
# platforms.
#
def supported_platform_names
result = platform_hash.keys
if result.empty? && parent
result = parent.supported_platform_names
end
result
end
# @return [Hash] the normalized hash which represents the platform
# information.
#
def platform_hash
case value = attributes_hash['platforms']
when String
{ value => nil }
when Array
result = {}
value.each do |a_value|
result[a_value] = nil
end
result
when Hash
value
else
{}
end
end
public
# @!group Deprecated Hooks support
#-------------------------------------------------------------------------#
# @return [Proc] the pre install callback if defined.
#
attr_reader :pre_install_callback
# @return [Proc] the post install callback if defined.
#
attr_reader :post_install_callback
# Calls the pre install callback if defined.
#
# @param [Pod::LocalPod] pod
# the local pod instance that manages the files described by this
# specification.
#
# @param [Podfile::TargetDefinition] target_definition
# the target definition that required this specification as a
# dependency.
#
# @return [Bool] whether a pre install callback was specified and it was
# called.
#
def pre_install!(pod, target_definition)
return false unless @pre_install_callback
@pre_install_callback.call(pod, target_definition)
true
end
# Calls the post install callback if defined.
#
# @param [Pod::TargetInstaller] target_installer
# the target installer that is performing the installation of the
# pod.
#
# @return [Bool] whether a post install callback was specified and it was
# called.
#
def post_install!(target_installer)
return false unless @post_install_callback
@post_install_callback.call(target_installer)
true
end
#-------------------------------------------------------------------------#
public
# @!group DSL attribute writers
# Sets the value for the attribute with the given name.
#
# @param [Symbol] name
# the name of the attribute.
#
# @param [Object] value
# the value to store.
#
# @param [Symbol] platform.
# If provided the attribute is stored only for the given platform.
#
# @note If the provides value is Hash the keys are converted to a string.
#
# @return void
#
def store_attribute(name, value, platform_name = nil)
name = name.to_s
value = convert_keys_to_string(value) if value.is_a?(Hash)
if platform_name
platform_name = platform_name.to_s
attributes_hash[platform_name] ||= {}
attributes_hash[platform_name][name] = value
else
attributes_hash[name] = value
end
end
# Defines the setters methods for the attributes providing support for the
# Ruby DSL.
#
DSL.attributes.values.each do |a|
define_method(a.writer_name) do |value|
store_attribute(a.name, value)
end
if a.writer_singular_form
alias_method(a.writer_singular_form, a.writer_name)
end
end
private
# Converts the keys of the given hash to a string.
#
# @param [Object] value
# the value that needs to be stripped from the Symbols.
#
# @return [Hash] the hash with the strings instead of the keys.
#
def convert_keys_to_string(value)
return unless value
result = {}
value.each do |key, subvalue|
subvalue = convert_keys_to_string(subvalue) if subvalue.is_a?(Hash)
result[key.to_s] = subvalue
end
result
end
#-------------------------------------------------------------------------#
public
# @!group File representation
# @return [String] The SHA1 digest of the file in which the specification
# is defined.
#
# @return [Nil] If the specification is not defined in a file.
#
def checksum
require 'digest'
unless defined_in_file.nil?
checksum = Digest::SHA1.hexdigest(File.read(defined_in_file))
checksum = checksum.encode('UTF-8') if checksum.respond_to?(:encode)
checksum
end
end
# @return [String] the path where the specification is defined, if loaded
# from a file.
#
def defined_in_file
root? ? @defined_in_file : root.defined_in_file
end
# Loads a specification form the given path.
#
# @param [Pathname, String] path
# the path of the `podspec` file.
#
# @param [String] subspec_name
# the name of the specification that should be returned. If it is
# nil returns the root specification.
#
# @raise If the file doesn't return a Pods::Specification after
# evaluation.
#
# @return [Specification] the specification
#
def self.from_file(path, subspec_name = nil)
path = Pathname.new(path)
unless path.exist?
raise Informative, "No podspec exists at path `#{path}`."
end
string = File.open(path, 'r:utf-8') { |f| f.read }
# Work around for Rubinius incomplete encoding in 1.9 mode
if string.respond_to?(:encoding) && string.encoding.name != 'UTF-8'
string.encode!('UTF-8')
end
from_string(string, path, subspec_name)
end
# Loads a specification with the given string.
#
# @param [String] spec_contents
# A string describing a specification.
#
# @param [Pathname, String] path @see from_file
# @param [String] subspec_name @see from_file
#
# @return [Specification] the specification
#
def self.from_string(spec_contents, path, subspec_name = nil)
path = Pathname.new(path)
case path.extname
when '.podspec'
spec = ::Pod._eval_podspec(spec_contents, path)
unless spec.is_a?(Specification)
raise Informative, "Invalid podspec file at path `#{path}`."
end
when '.json'
spec = Specification.from_json(spec_contents)
else
raise Informative, "Unsupported specification format `#{path.extname}`."
end
spec.defined_in_file = path
spec.subspec_by_name(subspec_name)
end
# Sets the path of the `podspec` file used to load the specification.
#
# @param [String] file
# the `podspec` file.
#
# @return [void]
#
# @visibility private
#
def defined_in_file=(file)
unless root?
raise StandardError, 'Defined in file can be set only for root specs.'
end
@defined_in_file = file
end
end
#---------------------------------------------------------------------------#
# @visibility private
#
# Evaluates the given string in the namespace of the Pod module.
#
# @param [String] string
# The string containing the Ruby description of the Object to
# evaluate.
#
# @param [Pathname] path
# The path where the object to evaluate is stored.
#
# @return [Object] it can return any object but, is expected to be called on
# `podspec` files that should return a #{Specification}.
#
#
def self._eval_podspec(string, path)
# rubocop:disable Eval
eval(string, nil, path.to_s)
# rubocop:enable Eval
rescue Exception => e
message = "Invalid `#{path.basename}` file: #{e.message}"
raise DSLError.new(message, path, e.backtrace)
end
end