587 lines
		
	
	
		
			18 KiB
		
	
	
	
		
			Ruby
		
	
	
	
	
	
			
		
		
	
	
			587 lines
		
	
	
		
			18 KiB
		
	
	
	
		
			Ruby
		
	
	
	
	
	
| # frozen_string_literal: true
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| 
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| require "cask/denylist"
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| require "cask/download"
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| require "digest"
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| require "utils/curl"
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| require "utils/git"
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| require "utils/shared_audits"
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| 
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| module Cask
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|   # Audit a cask for various problems.
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|   #
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|   # @api private
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|   class Audit
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|     extend Predicable
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| 
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|     attr_reader :cask, :download
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| 
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|     attr_predicate :appcast?, :new_cask?, :strict?, :online?, :token_conflicts?
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| 
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|     def initialize(cask, appcast: nil, download: nil, quarantine: nil,
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|                    token_conflicts: nil, online: nil, strict: nil,
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|                    new_cask: nil)
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| 
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|       # `new_cask` implies `online` and `strict`
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|       online = new_cask if online.nil?
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|       strict = new_cask if strict.nil?
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| 
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|       # `online` implies `appcast` and `download`
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|       appcast = online if appcast.nil?
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|       download = online if download.nil?
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| 
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|       # `strict` implies `token_conflicts`
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|       token_conflicts = strict if token_conflicts.nil?
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| 
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|       @cask = cask
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|       @appcast = appcast
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|       @download = Download.new(cask, quarantine: quarantine) if download
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|       @online = online
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|       @strict = strict
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|       @new_cask = new_cask
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|       @token_conflicts = token_conflicts
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|     end
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| 
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|     def run!
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|       check_denylist
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|       check_required_stanzas
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|       check_version
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|       check_sha256
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|       check_desc
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|       check_url
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|       check_generic_artifacts
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|       check_token_valid
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|       check_token_bad_words
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|       check_token_conflicts
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|       check_languages
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|       check_download
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|       check_https_availability
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|       check_single_pre_postflight
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|       check_single_uninstall_zap
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|       check_untrusted_pkg
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|       check_hosting_with_appcast
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|       check_latest_with_appcast
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|       check_latest_with_auto_updates
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|       check_stanza_requires_uninstall
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|       check_appcast_contains_version
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|       check_gitlab_repository
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|       check_gitlab_repository_archived
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|       check_gitlab_prerelease_version
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|       check_github_repository
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|       check_github_repository_archived
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|       check_github_prerelease_version
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|       check_bitbucket_repository
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|       self
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|     rescue => e
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|       odebug "#{e.message}\n#{e.backtrace.join("\n")}"
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|       add_error "exception while auditing #{cask}: #{e.message}"
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|       self
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|     end
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| 
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|     def errors
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|       @errors ||= []
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|     end
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| 
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|     def warnings
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|       @warnings ||= []
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|     end
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| 
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|     def add_error(message)
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|       errors << message
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|     end
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| 
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|     def add_warning(message)
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|       warnings << message
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|     end
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| 
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|     def errors?
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|       errors.any?
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|     end
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| 
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|     def warnings?
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|       warnings.any?
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|     end
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| 
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|     def result
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|       if errors?
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|         Formatter.error("failed")
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|       elsif warnings?
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|         Formatter.warning("warning")
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|       else
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|         Formatter.success("passed")
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|       end
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|     end
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| 
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|     def summary
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|       summary = ["audit for #{cask}: #{result}"]
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| 
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|       errors.each do |error|
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|         summary << " #{Formatter.error("-")} #{error}"
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|       end
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| 
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|       warnings.each do |warning|
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|         summary << " #{Formatter.warning("-")} #{warning}"
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|       end
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| 
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|       summary.join("\n")
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|     end
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| 
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|     def success?
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|       !(errors? || warnings?)
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|     end
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| 
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|     private
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| 
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|     def check_untrusted_pkg
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|       odebug "Auditing pkg stanza: allow_untrusted"
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| 
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|       return if @cask.sourcefile_path.nil?
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| 
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|       tap = @cask.tap
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|       return if tap.nil?
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|       return if tap.user != "Homebrew"
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| 
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|       return unless cask.artifacts.any? { |k| k.is_a?(Artifact::Pkg) && k.stanza_options.key?(:allow_untrusted) }
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| 
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|       add_warning "allow_untrusted is not permitted in official Homebrew Cask taps"
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|     end
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| 
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|     def check_stanza_requires_uninstall
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|       odebug "Auditing stanzas which require an uninstall"
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| 
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|       return if cask.artifacts.none? { |k| k.is_a?(Artifact::Pkg) || k.is_a?(Artifact::Installer) }
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|       return if cask.artifacts.any? { |k| k.is_a?(Artifact::Uninstall) }
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| 
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|       add_warning "installer and pkg stanzas require an uninstall stanza"
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|     end
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| 
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|     def check_single_pre_postflight
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|       odebug "Auditing preflight and postflight stanzas"
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| 
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|       if cask.artifacts.count { |k| k.is_a?(Artifact::PreflightBlock) && k.directives.key?(:preflight) } > 1
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|         add_warning "only a single preflight stanza is allowed"
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|       end
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| 
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|       count = cask.artifacts.count do |k|
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|         k.is_a?(Artifact::PostflightBlock) &&
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|           k.directives.key?(:postflight)
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|       end
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|       return unless count > 1
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| 
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|       add_warning "only a single postflight stanza is allowed"
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|     end
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| 
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|     def check_single_uninstall_zap
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|       odebug "Auditing single uninstall_* and zap stanzas"
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| 
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|       if cask.artifacts.count { |k| k.is_a?(Artifact::Uninstall) } > 1
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|         add_warning "only a single uninstall stanza is allowed"
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|       end
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| 
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|       count = cask.artifacts.count do |k|
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|         k.is_a?(Artifact::PreflightBlock) &&
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|           k.directives.key?(:uninstall_preflight)
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|       end
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| 
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|       add_warning "only a single uninstall_preflight stanza is allowed" if count > 1
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| 
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|       count = cask.artifacts.count do |k|
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|         k.is_a?(Artifact::PostflightBlock) &&
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|           k.directives.key?(:uninstall_postflight)
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|       end
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| 
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|       add_warning "only a single uninstall_postflight stanza is allowed" if count > 1
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| 
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|       return unless cask.artifacts.count { |k| k.is_a?(Artifact::Zap) } > 1
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| 
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|       add_warning "only a single zap stanza is allowed"
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|     end
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| 
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|     def check_required_stanzas
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|       odebug "Auditing required stanzas"
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|       [:version, :sha256, :url, :homepage].each do |sym|
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|         add_error "a #{sym} stanza is required" unless cask.send(sym)
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|       end
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|       add_error "at least one name stanza is required" if cask.name.empty?
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|       # TODO: specific DSL knowledge should not be spread around in various files like this
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|       installable_artifacts = cask.artifacts.reject { |k| [:uninstall, :zap].include?(k) }
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|       add_error "at least one activatable artifact stanza is required" if installable_artifacts.empty?
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|     end
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| 
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|     def check_version
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|       return unless cask.version
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| 
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|       check_no_string_version_latest
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|       check_no_file_separator_in_version
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|     end
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| 
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|     def check_no_string_version_latest
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|       odebug "Verifying version :latest does not appear as a string ('latest')"
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|       return unless cask.version.raw_version == "latest"
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| 
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|       add_error "you should use version :latest instead of version 'latest'"
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|     end
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| 
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|     def check_no_file_separator_in_version
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|       odebug "Verifying version does not contain '#{File::SEPARATOR}'"
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|       return unless cask.version.raw_version.is_a?(String)
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|       return unless cask.version.raw_version.include?(File::SEPARATOR)
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| 
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|       add_error "version should not contain '#{File::SEPARATOR}'"
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|     end
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| 
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|     def check_sha256
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|       return unless cask.sha256
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| 
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|       check_sha256_no_check_if_latest
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|       check_sha256_actually_256
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|       check_sha256_invalid
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|     end
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| 
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|     def check_sha256_no_check_if_latest
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|       odebug "Verifying sha256 :no_check with version :latest"
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|       return unless cask.version.latest?
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|       return if cask.sha256 == :no_check
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| 
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|       add_error "you should use sha256 :no_check when version is :latest"
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|     end
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| 
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|     def check_sha256_actually_256(sha256: cask.sha256, stanza: "sha256")
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|       odebug "Verifying #{stanza} string is a legal SHA-256 digest"
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|       return unless sha256.is_a?(String)
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|       return if sha256.length == 64 && sha256[/^[0-9a-f]+$/i]
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| 
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|       add_error "#{stanza} string must be of 64 hexadecimal characters"
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|     end
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| 
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|     def check_sha256_invalid(sha256: cask.sha256, stanza: "sha256")
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|       odebug "Verifying #{stanza} is not a known invalid value"
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|       empty_sha256 = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
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|       return unless sha256 == empty_sha256
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| 
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|       add_error "cannot use the sha256 for an empty string in #{stanza}: #{empty_sha256}"
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|     end
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| 
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|     def check_latest_with_appcast
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|       return unless cask.version.latest?
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|       return unless cask.appcast
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| 
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|       add_warning "Casks with an appcast should not use version :latest"
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|     end
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| 
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|     def check_latest_with_auto_updates
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|       return unless cask.version.latest?
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|       return unless cask.auto_updates
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| 
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|       add_warning "Casks with `version :latest` should not use `auto_updates`"
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|     end
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| 
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|     def check_hosting_with_appcast
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|       return if cask.appcast
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| 
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|       add_appcast = "please add an appcast. See https://github.com/Homebrew/homebrew-cask/blob/HEAD/doc/cask_language_reference/stanzas/appcast.md"
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| 
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|       case cask.url.to_s
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|       when %r{github.com/([^/]+)/([^/]+)/releases/download/(\S+)}
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|         return if cask.version.latest?
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| 
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|         add_warning "Download uses GitHub releases, #{add_appcast}"
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|       when %r{sourceforge.net/(\S+)}
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|         return if cask.version.latest?
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| 
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|         add_warning "Download is hosted on SourceForge, #{add_appcast}"
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|       when %r{dl.devmate.com/(\S+)}
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|         add_warning "Download is hosted on DevMate, #{add_appcast}"
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|       when %r{rink.hockeyapp.net/(\S+)}
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|         add_warning "Download is hosted on HockeyApp, #{add_appcast}"
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|       end
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|     end
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| 
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|     def check_desc
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|       return unless new_cask?
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| 
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|       return if cask.desc.present?
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| 
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|       add_warning "Cask should have a description. Please add a `desc` stanza."
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|     end
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| 
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|     def check_url
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|       return unless cask.url
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| 
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|       check_download_url_format
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|     end
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| 
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|     def check_download_url_format
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|       odebug "Auditing URL format"
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|       if bad_sourceforge_url?
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|         add_warning "SourceForge URL format incorrect. See https://github.com/Homebrew/homebrew-cask/blob/HEAD/doc/cask_language_reference/stanzas/url.md#sourceforgeosdn-urls"
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|       elsif bad_osdn_url?
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|         add_warning "OSDN URL format incorrect. See https://github.com/Homebrew/homebrew-cask/blob/HEAD/doc/cask_language_reference/stanzas/url.md#sourceforgeosdn-urls"
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|       end
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|     end
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| 
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|     def bad_url_format?(regex, valid_formats_array)
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|       return false unless cask.url.to_s.match?(regex)
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| 
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|       valid_formats_array.none? { |format| cask.url.to_s =~ format }
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|     end
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| 
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|     def bad_sourceforge_url?
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|       bad_url_format?(/sourceforge/,
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|                       [
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|                         %r{\Ahttps://sourceforge\.net/projects/[^/]+/files/latest/download\Z},
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|                         %r{\Ahttps://downloads\.sourceforge\.net/(?!(project|sourceforge)/)},
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|                       ])
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|     end
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| 
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|     def bad_osdn_url?
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|       bad_url_format?(/osd/, [%r{\Ahttps?://([^/]+.)?dl\.osdn\.jp/}])
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|     end
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| 
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|     def check_generic_artifacts
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|       cask.artifacts.select { |a| a.is_a?(Artifact::Artifact) }.each do |artifact|
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|         unless artifact.target.absolute?
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|           add_error "target must be absolute path for #{artifact.class.english_name} #{artifact.source}"
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|         end
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|       end
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|     end
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| 
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|     def check_languages
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|       @cask.languages.each do |language|
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|         Locale.parse(language)
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|       rescue Locale::ParserError
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|         add_error "Locale '#{language}' is invalid."
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|       end
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|     end
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| 
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|     def check_token_conflicts
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|       return unless token_conflicts?
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|       return unless core_formula_names.include?(cask.token)
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| 
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|       add_warning "possible duplicate, cask token conflicts with Homebrew core formula: #{core_formula_url}"
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|     end
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| 
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|     def check_token_valid
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|       return unless strict?
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| 
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|       add_warning "cask token is not lowercase" if cask.token.downcase!
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| 
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|       add_warning "cask token contains non-ascii characters" unless cask.token.ascii_only?
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| 
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|       add_warning "cask token + should be replaced by -plus-" if cask.token.include? "+"
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| 
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|       add_warning "cask token @ should be replaced by -at-" if cask.token.include? "@"
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| 
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|       add_warning "cask token whitespace should be replaced by hyphens" if cask.token.include? " "
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| 
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|       add_warning "cask token underscores should be replaced by hyphens" if cask.token.include? "_"
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| 
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|       if cask.token.match?(/[^a-z0-9\-]/)
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|         add_warning "cask token should only contain alphanumeric characters and hyphens"
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|       end
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| 
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|       add_warning "cask token should not contain double hyphens" if cask.token.include? "--"
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| 
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|       return unless cask.token.end_with?("-") || cask.token.start_with?("-")
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| 
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|       add_warning "cask token should not have leading or trailing hyphens"
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|     end
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| 
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|     def check_token_bad_words
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|       return unless strict?
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| 
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|       token = cask.token
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| 
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|       add_warning "cask token contains .app" if token.end_with? ".app"
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| 
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|       if /-(?<designation>alpha|beta|rc|release-candidate)$/ =~ cask.token &&
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|          cask.tap&.official? &&
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|          cask.tap != "homebrew/cask-versions"
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|         add_warning "cask token contains version designation '#{designation}'"
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|       end
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| 
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|       add_warning "cask token mentions launcher" if token.end_with? "launcher"
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| 
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|       add_warning "cask token mentions desktop" if token.end_with? "desktop"
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| 
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|       add_warning "cask token mentions platform" if token.end_with? "mac", "osx", "macos"
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| 
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|       add_warning "cask token mentions architecture" if token.end_with? "x86", "32_bit", "x86_64", "64_bit"
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| 
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|       return unless token.end_with?("cocoa", "qt", "gtk", "wx", "java") && !%w[cocoa qt gtk wx java].include?(token)
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| 
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|       add_warning "cask token mentions framework"
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|     end
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| 
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|     def core_tap
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|       @core_tap ||= CoreTap.instance
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|     end
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| 
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|     def core_formula_names
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|       core_tap.formula_names
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|     end
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| 
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|     def core_formula_url
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|       "#{core_tap.default_remote}/blob/HEAD/Formula/#{cask.token}.rb"
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|     end
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| 
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|     def check_download
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|       return unless download && cask.url
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| 
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|       odebug "Auditing download"
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|       downloaded_path = download.perform
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|       Verify.all(cask, downloaded_path)
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|     rescue => e
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|       add_error "download not possible: #{e.message}"
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|     end
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| 
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|     def check_appcast_contains_version
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|       return unless appcast?
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|       return if cask.appcast.to_s.empty?
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|       return if cask.appcast.must_contain == :no_check
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| 
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|       appcast_stanza = cask.appcast.to_s
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|       appcast_contents, = begin
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|         curl_output("--compressed", "--user-agent", HOMEBREW_USER_AGENT_FAKE_SAFARI, "--location",
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|                     "--globoff", "--max-time", "5", appcast_stanza)
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|       rescue
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|         add_error "appcast at URL '#{appcast_stanza}' offline or looping"
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|         return
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|       end
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| 
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|       version_stanza = cask.version.to_s
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|       adjusted_version_stanza = if cask.appcast.must_contain.blank?
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|         version_stanza.match(/^[[:alnum:].]+/)[0]
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|       else
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|         cask.appcast.must_contain
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|       end
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|       return if appcast_contents.include? adjusted_version_stanza
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| 
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|       add_warning "appcast at URL '#{appcast_stanza}' does not contain"\
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|                   " the version number '#{adjusted_version_stanza}':\n#{appcast_contents}"
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|     end
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| 
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|     def check_github_prerelease_version
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|       return if cask.tap == "homebrew/cask-versions"
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| 
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|       odebug "Auditing GitHub prerelease"
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|       user, repo = get_repo_data(%r{https?://github\.com/([^/]+)/([^/]+)/?.*}) if @online
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|       return if user.nil?
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| 
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|       tag = SharedAudits.github_tag_from_url(cask.url)
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|       tag ||= cask.version
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|       error = SharedAudits.github_release(user, repo, tag, cask: cask)
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|       add_error error if error
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|     end
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| 
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|     def check_gitlab_prerelease_version
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|       return if cask.tap == "homebrew/cask-versions"
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| 
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|       user, repo = get_repo_data(%r{https?://gitlab\.com/([^/]+)/([^/]+)/?.*}) if @online
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|       return if user.nil?
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| 
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|       odebug "Auditing GitLab prerelease"
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| 
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|       tag = SharedAudits.gitlab_tag_from_url(cask.url)
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|       tag ||= cask.version
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|       error = SharedAudits.gitlab_release(user, repo, tag)
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|       add_error error if error
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|     end
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| 
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|     def check_github_repository_archived
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|       user, repo = get_repo_data(%r{https?://github\.com/([^/]+)/([^/]+)/?.*}) if @online
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|       return if user.nil?
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| 
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|       odebug "Auditing GitHub repo archived"
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| 
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|       metadata = SharedAudits.github_repo_data(user, repo)
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|       return if metadata.nil?
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| 
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|       add_error "GitHub repo is archived" if metadata["archived"]
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|     end
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| 
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|     def check_gitlab_repository_archived
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|       user, repo = get_repo_data(%r{https?://gitlab\.com/([^/]+)/([^/]+)/?.*}) if @online
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|       return if user.nil?
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| 
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|       odebug "Auditing GitLab repo archived"
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| 
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|       metadata = SharedAudits.gitlab_repo_data(user, repo)
 | |
|       return if metadata.nil?
 | |
| 
 | |
|       add_error "GitLab repo is archived" if metadata["archived"]
 | |
|     end
 | |
| 
 | |
|     def check_github_repository
 | |
|       return unless @new_cask
 | |
| 
 | |
|       user, repo = get_repo_data(%r{https?://github\.com/([^/]+)/([^/]+)/?.*})
 | |
|       return if user.nil?
 | |
| 
 | |
|       odebug "Auditing GitHub repo"
 | |
| 
 | |
|       error = SharedAudits.github(user, repo)
 | |
|       add_error error if error
 | |
|     end
 | |
| 
 | |
|     def check_gitlab_repository
 | |
|       return unless new_cask?
 | |
| 
 | |
|       user, repo = get_repo_data(%r{https?://gitlab\.com/([^/]+)/([^/]+)/?.*})
 | |
|       return if user.nil?
 | |
| 
 | |
|       odebug "Auditing GitLab repo"
 | |
| 
 | |
|       error = SharedAudits.gitlab(user, repo)
 | |
|       add_error error if error
 | |
|     end
 | |
| 
 | |
|     def check_bitbucket_repository
 | |
|       return unless @new_cask
 | |
| 
 | |
|       user, repo = get_repo_data(%r{https?://bitbucket\.org/([^/]+)/([^/]+)/?.*})
 | |
|       return if user.nil?
 | |
| 
 | |
|       odebug "Auditing Bitbucket repo"
 | |
| 
 | |
|       error = SharedAudits.bitbucket(user, repo)
 | |
|       add_error error if error
 | |
|     end
 | |
| 
 | |
|     def get_repo_data(regex)
 | |
|       return unless online?
 | |
| 
 | |
|       _, user, repo = *regex.match(cask.url.to_s)
 | |
|       _, user, repo = *regex.match(cask.homepage) unless user
 | |
|       _, user, repo = *regex.match(cask.appcast.to_s) unless user
 | |
|       return if !user || !repo
 | |
| 
 | |
|       repo.gsub!(/.git$/, "")
 | |
| 
 | |
|       [user, repo]
 | |
|     end
 | |
| 
 | |
|     def check_denylist
 | |
|       return unless cask.tap&.official?
 | |
|       return unless reason = Denylist.reason(cask.token)
 | |
| 
 | |
|       add_error "#{cask.token} is not allowed: #{reason}"
 | |
|     end
 | |
| 
 | |
|     def check_https_availability
 | |
|       return unless download
 | |
| 
 | |
|       check_url_for_https_availability(cask.url, user_agents: [cask.url.user_agent]) if cask.url && !cask.url.using
 | |
| 
 | |
|       check_url_for_https_availability(cask.appcast, check_content: true) if cask.appcast && appcast?
 | |
| 
 | |
|       check_url_for_https_availability(cask.homepage, check_content: true, user_agents: [:browser]) if cask.homepage
 | |
|     end
 | |
| 
 | |
|     def check_url_for_https_availability(url_to_check, **options)
 | |
|       problem = curl_check_http_content(url_to_check.to_s, **options)
 | |
|       add_error problem if problem
 | |
|     end
 | |
|   end
 | |
| end
 | 
