/
cask_loader.rb
249 lines (193 loc) 路 6.2 KB
/
cask_loader.rb
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# typed: false
# frozen_string_literal: true
require "cask/cache"
require "cask/cask"
require "uri"
module Cask
# Loads a cask from various sources.
#
# @api private
module CaskLoader
# Loads a cask from a string.
class FromContentLoader
attr_reader :content
def self.can_load?(ref)
return false unless ref.respond_to?(:to_str)
content = ref.to_str
token = /(?:"[^"]*"|'[^']*')/
curly = /\(\s*#{token.source}\s*\)\s*\{.*\}/
do_end = /\s+#{token.source}\s+do(?:\s*;\s*|\s+).*end/
regex = /\A\s*cask(?:#{curly.source}|#{do_end.source})\s*\Z/m
content.match?(regex)
end
def initialize(content)
@content = content.force_encoding("UTF-8")
end
def load(config:)
@config = config
instance_eval(content, __FILE__, __LINE__)
end
private
def cask(header_token, **options, &block)
Cask.new(header_token, **options, config: @config, &block)
end
end
# Loads a cask from a path.
class FromPathLoader < FromContentLoader
def self.can_load?(ref)
path = Pathname(ref)
path.extname == ".rb" && path.expand_path.exist?
end
attr_reader :token, :path
def initialize(path) # rubocop:disable Lint/MissingSuper
path = Pathname(path).expand_path
@token = path.basename(".rb").to_s
@path = path
end
def load(config:)
raise CaskUnavailableError.new(token, "'#{path}' does not exist.") unless path.exist?
raise CaskUnavailableError.new(token, "'#{path}' is not readable.") unless path.readable?
raise CaskUnavailableError.new(token, "'#{path}' is not a file.") unless path.file?
@content = path.read(encoding: "UTF-8")
@config = config
begin
instance_eval(content, path).tap do |cask|
raise CaskUnreadableError.new(token, "'#{path}' does not contain a cask.") unless cask.is_a?(Cask)
end
rescue NameError, ArgumentError, ScriptError => e
error = CaskUnreadableError.new(token, e.message)
error.set_backtrace e.backtrace
raise error
end
end
private
def cask(header_token, **options, &block)
raise CaskTokenMismatchError.new(token, header_token) if token != header_token
super(header_token, **options, sourcefile_path: path, &block)
end
end
# Loads a cask from a URI.
class FromURILoader < FromPathLoader
extend T::Sig
def self.can_load?(ref)
uri_regex = ::URI::DEFAULT_PARSER.make_regexp
return false unless ref.to_s.match?(Regexp.new("\\A#{uri_regex.source}\\Z", uri_regex.options))
uri = URI(ref)
return false unless uri
return false unless uri.path
true
end
attr_reader :url
sig { params(url: T.any(URI::Generic, String)).void }
def initialize(url)
@url = URI(url)
super Cache.path/File.basename(@url.path)
end
def load(config:)
path.dirname.mkpath
begin
ohai "Downloading #{url}"
curl_download url, to: path
rescue ErrorDuringExecution
raise CaskUnavailableError.new(token, "Failed to download #{Formatter.url(url)}.")
end
super
end
end
# Loads a cask from a tap path.
class FromTapPathLoader < FromPathLoader
def self.can_load?(ref)
super && !Tap.from_path(ref).nil?
end
attr_reader :tap
def initialize(path)
@tap = Tap.from_path(path)
super(path)
end
private
def cask(*args, &block)
super(*args, tap: tap, &block)
end
end
# Loads a cask from a specific tap.
class FromTapLoader < FromTapPathLoader
def self.can_load?(ref)
ref.to_s.match?(HOMEBREW_TAP_CASK_REGEX)
end
def initialize(tapped_name)
user, repo, token = tapped_name.split("/", 3)
super Tap.fetch(user, repo).cask_dir/"#{token}.rb"
end
def load(config:)
tap.install unless tap.installed?
super
end
end
# Loads a cask from an existing {Cask} instance.
class FromInstanceLoader
def self.can_load?(ref)
ref.is_a?(Cask)
end
def initialize(cask)
@cask = cask
end
def load(config:)
@cask
end
end
# Pseudo-loader which raises an error when trying to load the corresponding cask.
class NullLoader < FromPathLoader
extend T::Sig
def self.can_load?(*)
true
end
sig { params(ref: T.any(String, Pathname)).void }
def initialize(ref)
token = File.basename(ref, ".rb")
super CaskLoader.default_path(token)
end
def load(config:)
raise CaskUnavailableError.new(token, "No Cask with this name exists.")
end
end
def self.path(ref)
self.for(ref).path
end
def self.load(ref, config: nil)
self.for(ref).load(config: config)
end
def self.for(ref)
[
FromInstanceLoader,
FromContentLoader,
FromURILoader,
FromTapLoader,
FromTapPathLoader,
FromPathLoader,
].each do |loader_class|
return loader_class.new(ref) if loader_class.can_load?(ref)
end
return FromTapPathLoader.new(default_path(ref)) if FromTapPathLoader.can_load?(default_path(ref))
case (possible_tap_casks = tap_paths(ref)).count
when 1
return FromTapPathLoader.new(possible_tap_casks.first)
when 2..Float::INFINITY
loaders = possible_tap_casks.map(&FromTapPathLoader.method(:new))
raise CaskError, <<~EOS
Cask #{ref} exists in multiple taps:
#{loaders.map { |loader| " #{loader.tap}/#{loader.token}" }.join("\n")}
EOS
end
possible_installed_cask = Cask.new(ref)
return FromPathLoader.new(possible_installed_cask.installed_caskfile) if possible_installed_cask.installed?
NullLoader.new(ref)
end
def self.default_path(token)
Tap.default_cask_tap.cask_dir/"#{token.to_s.downcase}.rb"
end
def self.tap_paths(token)
Tap.map { |t| t.cask_dir/"#{token.to_s.downcase}.rb" }
.select(&:exist?)
end
end
end