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require "dependency"
require "dependencies"
require "ld64_dependency"
require "requirement"
require "requirements"
require "set"
## A dependency is a formula that another formula needs to install.
## A requirement is something other than a formula that another formula
## needs to be present. This includes external language modules,
## command-line tools in the path, or any arbitrary predicate.
##
## The `depends_on` method in the formula DSL is used to declare
## dependencies and requirements.
# This class is used by `depends_on` in the formula DSL to turn dependency
# specifications into the proper kinds of dependencies and requirements.
class DependencyCollector
# Define the languages that we can handle as external dependencies.
LANGUAGE_MODULES = Set[
:lua, :lua51, :perl, :python, :python3, :ruby
].freeze
CACHE = {}
def self.clear_cache
CACHE.clear
end
attr_reader :deps, :requirements
def initialize
@deps = Dependencies.new
@requirements = Requirements.new
end
def add(spec)
case dep = fetch(spec)
when Dependency
@deps << dep
when Requirement
@requirements << dep
end
dep
end
def fetch(spec)
CACHE.fetch(cache_key(spec)) { |key| CACHE[key] = build(spec) }
end
def cache_key(spec)
if Resource === spec && spec.download_strategy == CurlDownloadStrategy
File.extname(spec.url)
else
spec
end
end
def build(spec)
spec, tags = Hash === spec ? spec.first : spec
parse_spec(spec, Array(tags))
end
private
def parse_spec(spec, tags)
case spec
when String
parse_string_spec(spec, tags)
when Resource
resource_dep(spec, tags)
when Symbol
parse_symbol_spec(spec, tags)
when Requirement, Dependency
spec
when Class
parse_class_spec(spec, tags)
else
raise TypeError, "Unsupported type #{spec.class.name} for #{spec.inspect}"
end
end
def parse_string_spec(spec, tags)
if HOMEBREW_TAP_FORMULA_REGEX === spec
TapDependency.new(spec, tags)
elsif tags.empty?
Dependency.new(spec, tags)
elsif (tag = tags.first) && LANGUAGE_MODULES.include?(tag)
LanguageModuleRequirement.new(tag, spec, tags[1])
else
Dependency.new(spec, tags)
end
end
def parse_symbol_spec(spec, tags)
case spec
when :x11 then X11Requirement.new(spec.to_s, tags)
when :xcode then XcodeRequirement.new(tags)
when :macos then MinimumMacOSRequirement.new(tags)
when :mysql then MysqlRequirement.new(tags)
when :postgresql then PostgresqlRequirement.new(tags)
when :gpg then GPGRequirement.new(tags)
when :fortran then FortranRequirement.new(tags)
when :mpi then MPIRequirement.new(*tags)
when :tex then TeXRequirement.new(tags)
when :arch then ArchRequirement.new(tags)
when :hg then MercurialRequirement.new(tags)
when :python then PythonRequirement.new(tags)
when :python3 then Python3Requirement.new(tags)
when :java then JavaRequirement.new(tags)
when :rbenv then RbenvRequirement.new(tags)
when :ruby then RubyRequirement.new(tags)
when :osxfuse then OsxfuseRequirement.new(tags)
when :tuntap then TuntapRequirement.new(tags)
when :ant then ant_dep(spec, tags)
when :apr then AprRequirement.new(tags)
when :emacs then EmacsRequirement.new(tags)
# Tiger's ld is too old to properly link some software
when :ld64 then LD64Dependency.new if MacOS.version < :leopard
when :python2
PythonRequirement.new(tags)
else
raise ArgumentError, "Unsupported special dependency #{spec.inspect}"
end
end
def parse_class_spec(spec, tags)
if spec < Requirement
spec.new(tags)
else
raise TypeError, "#{spec.inspect} is not a Requirement subclass"
end
end
def ant_dep(spec, tags)
if MacOS.version >= :mavericks
Dependency.new(spec.to_s, tags)
end
end
def resource_dep(spec, tags)
tags << :build
strategy = spec.download_strategy
case
when strategy <= CurlDownloadStrategy
parse_url_spec(spec.url, tags)
when strategy <= GitDownloadStrategy
GitRequirement.new(tags)
when strategy <= MercurialDownloadStrategy
MercurialRequirement.new(tags)
when strategy <= FossilDownloadStrategy
Dependency.new("fossil", tags)
when strategy <= BazaarDownloadStrategy
Dependency.new("bazaar", tags)
when strategy <= CVSDownloadStrategy
Dependency.new("cvs", tags) if MacOS.version >= :mavericks || !MacOS::Xcode.provides_cvs?
when strategy < AbstractDownloadStrategy
# allow unknown strategies to pass through
else
raise TypeError,
"#{strategy.inspect} is not an AbstractDownloadStrategy subclass"
end
end
def parse_url_spec(url, tags)
case File.extname(url)
when ".xz" then Dependency.new("xz", tags)
when ".lha", ".lzh" then Dependency.new("lha", tags)
when ".lz" then Dependency.new("lzip", tags)
when ".rar" then Dependency.new("unrar", tags)
when ".7z" then Dependency.new("p7zip", tags)
end
end
end