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require "dependency"
require "dependencies"
require "requirement"
require "requirements"
require "set"
require "extend/cachable"
## 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
extend Cachable
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)
self.class.cache.fetch(cache_key(spec)) { |key| self.class.cache[key] = build(spec) }
end
def cache_key(spec)
if spec.is_a?(Resource) && spec.download_strategy == CurlDownloadStrategy
File.extname(spec.url)
else
spec
end
end
def build(spec)
spec, tags = spec.is_a?(Hash) ? spec.first : spec
parse_spec(spec, Array(tags))
end
def cvs_dep_if_needed(tags)
Dependency.new("cvs", tags)
end
def xz_dep_if_needed(tags)
Dependency.new("xz", tags)
end
def ld64_dep_if_needed(*); end
def self.tar_needs_xz_dependency?
!new.xz_dep_if_needed([]).nil?
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 spec =~ HOMEBREW_TAP_FORMULA_REGEX
TapDependency.new(spec, tags)
elsif tags.empty?
Dependency.new(spec, tags)
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 :linux then LinuxRequirement.new(tags)
when :macos then MacOSRequirement.new(tags)
when :arch then ArchRequirement.new(tags)
when :java then JavaRequirement.new(tags)
when :osxfuse then OsxfuseRequirement.new(tags)
when :tuntap then TuntapRequirement.new(tags)
when :ld64 then ld64_dep_if_needed(tags)
else
raise ArgumentError, "Unsupported special dependency #{spec.inspect}"
end
end
def parse_class_spec(spec, tags)
unless spec < Requirement
raise TypeError, "#{spec.inspect} is not a Requirement subclass"
end
spec.new(tags)
end
def resource_dep(spec, tags)
tags << :build
strategy = spec.download_strategy
if strategy <= CurlDownloadStrategy
parse_url_spec(spec.url, tags)
elsif strategy <= GitDownloadStrategy
GitRequirement.new(tags)
elsif strategy <= SubversionDownloadStrategy
SubversionRequirement.new(tags)
elsif strategy <= MercurialDownloadStrategy
Dependency.new("mercurial", tags)
elsif strategy <= FossilDownloadStrategy
Dependency.new("fossil", tags)
elsif strategy <= BazaarDownloadStrategy
Dependency.new("bazaar", tags)
elsif strategy <= CVSDownloadStrategy
cvs_dep_if_needed(tags)
elsif 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 xz_dep_if_needed(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
require "extend/os/dependency_collector"
|
