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require 'dependency'
require 'dependencies'
require 'requirement'
require 'requirements'
require 'requirements/ld64_dependency'
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[
:chicken, :jruby, :lua, :node, :ocaml, :perl, :python, :python3, :rbx, :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 = case spec
when Hash then destructure_spec_hash(spec)
else spec
end
parse_spec(spec, Array(tags))
end
private
def destructure_spec_hash(spec)
spec.each { |o| return o }
end
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 tags.empty?
Dependency.new(spec, tags)
elsif (tag = tags.first) && LANGUAGE_MODULES.include?(tag)
LanguageModuleDependency.new(tag, spec, tags[1])
elsif HOMEBREW_TAP_FORMULA_REGEX === spec
TapDependency.new(spec, tags)
else
Dependency.new(spec, tags)
end
end
def parse_symbol_spec(spec, tags)
case spec
when :x11 then X11Dependency.new(spec.to_s, tags)
when :xcode then XcodeDependency.new(tags)
when :macos then MinimumMacOSRequirement.new(tags)
when :mysql then MysqlDependency.new(tags)
when :postgresql then PostgresqlDependency.new(tags)
when :gpg then GPGDependency.new(tags)
when :fortran then FortranDependency.new(tags)
when :mpi then MPIDependency.new(*tags)
when :tex then TeXDependency.new(tags)
when :arch then ArchRequirement.new(tags)
when :hg then MercurialDependency.new(tags)
when :python then PythonDependency.new(tags)
when :python3 then Python3Dependency.new(tags)
when :java then JavaDependency.new(tags)
when :osxfuse then OsxfuseDependency.new(tags)
when :tuntap then TuntapDependency.new(tags)
when :ant then ant_dep(spec, tags)
when :apr then AprDependency.new(tags)
# Tiger's ld is too old to properly link some software
when :ld64 then LD64Dependency.new if MacOS.version < :leopard
when :clt # deprecated
when :autoconf, :automake, :bsdmake, :libtool # deprecated
autotools_dep(spec, tags)
when :cairo, :fontconfig, :freetype, :libpng, :pixman # deprecated
Dependency.new(spec.to_s, tags)
when :libltdl # deprecated
tags << :run
Dependency.new("libtool", tags)
when :python2
PythonDependency.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 autotools_dep(spec, tags)
tags << :build unless tags.include? :run
Dependency.new(spec.to_s, tags)
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
GitDependency.new(tags)
when strategy <= MercurialDownloadStrategy
MercurialDependency.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 '.lz' then Dependency.new('lzip', tags)
when '.rar' then Dependency.new('unrar', tags)
when '.7z' then Dependency.new('p7zip', tags)
end
end
end
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