314 lines
10 KiB
Ruby
314 lines
10 KiB
Ruby
require "cask/checkable"
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require "cask/download"
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require "digest"
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require "utils/git"
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module Cask
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class Audit
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include Checkable
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attr_reader :cask, :commit_range, :download
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def initialize(cask, download: false, check_token_conflicts: false, commit_range: nil, command: SystemCommand)
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@cask = cask
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@download = download
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@commit_range = commit_range
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@check_token_conflicts = check_token_conflicts
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@command = command
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end
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def check_token_conflicts?
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@check_token_conflicts
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end
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def run!
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check_required_stanzas
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check_version_and_checksum
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check_version
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check_sha256
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check_appcast_checkpoint
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check_url
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check_generic_artifacts
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check_token_conflicts
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check_download
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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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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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def success?
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!(errors? || warnings?)
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end
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def summary_header
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"audit for #{cask}"
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end
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private
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def check_untrusted_pkg
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odebug "Auditing pkg stanza: allow_untrusted"
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return if @cask.sourcefile_path.nil?
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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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return unless cask.artifacts.any? { |k| k.is_a?(Artifact::Pkg) && k.stanza_options.key?(:allow_untrusted) }
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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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def check_stanza_requires_uninstall
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odebug "Auditing stanzas which require an uninstall"
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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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add_warning "installer and pkg stanzas require an uninstall stanza"
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end
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def check_single_pre_postflight
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odebug "Auditing preflight and postflight stanzas"
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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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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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add_warning "only a single postflight stanza is allowed"
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end
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def check_single_uninstall_zap
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odebug "Auditing single uninstall_* and zap stanzas"
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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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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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if count > 1
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add_warning "only a single uninstall_preflight stanza is allowed"
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end
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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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if count > 1
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add_warning "only a single uninstall_postflight stanza is allowed"
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end
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return unless cask.artifacts.count { |k| k.is_a?(Artifact::Zap) } > 1
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add_warning "only a single zap stanza is allowed"
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end
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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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def check_version_and_checksum
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return if @cask.sourcefile_path.nil?
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tap = @cask.tap
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return if tap.nil?
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return if commit_range.nil?
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previous_cask_contents = Git.last_revision_of_file(tap.path, @cask.sourcefile_path, before_commit: commit_range)
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return if previous_cask_contents.empty?
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begin
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previous_cask = CaskLoader.load(previous_cask_contents)
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return unless previous_cask.version == cask.version
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return if previous_cask.sha256 == cask.sha256
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add_error "only sha256 changed (see: https://github.com/Homebrew/homebrew-cask/blob/master/doc/cask_language_reference/stanzas/sha256.md)"
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rescue CaskError => e
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add_warning "Skipped version and checksum comparison. Reading previous version failed: #{e}"
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end
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end
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def check_version
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return unless cask.version
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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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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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add_error "you should use version :latest instead of version 'latest'"
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end
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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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add_error "version should not contain '#{File::SEPARATOR}'"
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end
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def check_sha256
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return unless cask.sha256
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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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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? && cask.sha256 != :no_check
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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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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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add_error "#{stanza} string must be of 64 hexadecimal characters"
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end
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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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add_error "cannot use the sha256 for an empty string in #{stanza}: #{empty_sha256}"
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end
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def check_appcast_checkpoint
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return unless cask.appcast
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return unless cask.appcast.checkpoint
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add_error "Appcast checkpoints have been removed from Homebrew Cask"
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end
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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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add_warning "Casks with an appcast should not use version :latest"
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end
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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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add_warning "Casks with `version :latest` should not use `auto_updates`"
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end
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def check_hosting_with_appcast
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return if cask.appcast
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add_appcast = "please add an appcast. See https://github.com/Homebrew/homebrew-cask/blob/master/doc/cask_language_reference/stanzas/appcast.md"
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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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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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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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def check_url
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return unless cask.url
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check_download_url_format
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end
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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/master/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/master/doc/cask_language_reference/stanzas/url.md#sourceforgeosdn-urls"
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end
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end
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def bad_url_format?(regex, valid_formats_array)
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return false unless cask.url.to_s =~ regex
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valid_formats_array.none? { |format| cask.url.to_s =~ format }
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end
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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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# special cases: cannot find canonical format URL
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%r{\Ahttps?://brushviewer\.sourceforge\.net/brushviewql\.zip\Z},
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%r{\Ahttps?://doublecommand\.sourceforge\.net/files/},
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%r{\Ahttps?://excalibur\.sourceforge\.net/get\.php\?id=},
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])
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end
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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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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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def check_token_conflicts
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return unless check_token_conflicts?
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return unless core_formula_names.include?(cask.token)
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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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def core_tap
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@core_tap ||= CoreTap.instance
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end
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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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def core_formula_url
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"#{core_tap.default_remote}/blob/master/Formula/#{cask.token}.rb"
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end
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def check_download
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return unless download && cask.url
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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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end
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end
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