Class: Homebrew::FormulaAuditor Private

Inherits:
Object
  • Object
show all
Includes:
FormulaCellarChecks
Defined in:
brew/Library/Homebrew/formula_auditor.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Auditor for checking common violations in Formulae.

Constant Summary collapse

PERMITTED_LICENSE_MISMATCHES =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

{
  "AGPL-3.0" => ["AGPL-3.0-only", "AGPL-3.0-or-later"],
  "GPL-2.0"  => ["GPL-2.0-only",  "GPL-2.0-or-later"],
  "GPL-3.0"  => ["GPL-3.0-only",  "GPL-3.0-or-later"],
  "LGPL-2.1" => ["LGPL-2.1-only", "LGPL-2.1-or-later"],
  "LGPL-3.0" => ["LGPL-3.0-only", "LGPL-3.0-or-later"],
}.freeze

Constants included from FormulaCellarChecks

FormulaCellarChecks::VALID_LIBRARY_EXTENSIONS

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from FormulaCellarChecks

#audit_installed, #check_easy_install_pth, #check_elisp_dirname, #check_elisp_root, #check_env_path, #check_generic_executables, #check_infopages, #check_jars, #check_linkage, #check_manpages, #check_non_executables, #check_non_libraries, #check_openssl_links, #check_plist, #check_python_framework_links, #check_python_packages, #check_python_symlinks, #check_shadowed_headers, #check_shim_references, #valid_library_extension?

Constructor Details

#initialize(formula, options = {}) ⇒ FormulaAuditor

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of FormulaAuditor.



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 17

def initialize(formula, options = {})
  @formula = formula
  @versioned_formula = formula.versioned_formula?
  @new_formula_inclusive = options[:new_formula]
  @new_formula = options[:new_formula] && !@versioned_formula
  @strict = options[:strict]
  @online = options[:online]
  @build_stable = options[:build_stable]
  @git = options[:git]
  @display_cop_names = options[:display_cop_names]
  @only = options[:only]
  @except = options[:except]
  # Accept precomputed style offense results, for efficiency
  @style_offenses = options[:style_offenses]
  # Allow the formula tap to be set as homebrew/core, for testing purposes
  @core_tap = formula.tap&.core_tap? || options[:core_tap]
  @problems = []
  @new_formula_problems = []
  @text = FormulaTextAuditor.new(formula.path)
  @specs = %w[stable head].map { |s| formula.send(s) }.compact
  @spdx_license_data = options[:spdx_license_data]
  @spdx_exception_data = options[:spdx_exception_data]
  @tap_audit_exceptions = options[:tap_audit_exceptions]
end

Instance Attribute Details

#formula ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 15

def formula
  @formula
end

#new_formula_problems ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 15

def new_formula_problems
  @new_formula_problems
end

#problems ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 15

def problems
  @problems
end

#text ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 15

def text
  @text
end

Class Method Details

.aliases ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 124

def self.aliases
  # core aliases + tap alias names + tap alias full name
  @aliases ||= Formula.aliases + Formula.tap_aliases
end

Instance Method Details

#audit ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 720

def audit
  only_audits = @only
  except_audits = @except

  methods.map(&:to_s).grep(/^audit_/).each do |audit_method_name|
    name = audit_method_name.delete_prefix("audit_")
    if only_audits
      next unless only_audits.include?(name)
    elsif except_audits
      next if except_audits.include?(name)
    end
    send(audit_method_name)
  end
end

#audit_bitbucket_repository ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 452

def audit_bitbucket_repository
  user, repo = get_repo_data(%r{https?://bitbucket\.org/([^/]+)/([^/]+)/?.*}) if @new_formula
  return if user.blank?

  warning = SharedAudits.bitbucket(user, repo)
  return if warning.nil?

  new_formula_problem warning
end

#audit_bottle_disabled ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 396

def audit_bottle_disabled
  return unless formula.bottle_disabled?
  return if formula.bottle_unneeded?

  problem "Unrecognized bottle modifier" unless formula.bottle_disable_reason.valid?

  return unless @core_tap

  problem "Formulae in homebrew/core should not use `bottle :disabled`"
end

#audit_bottle_spec ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 384

def audit_bottle_spec
  # special case: new versioned formulae should be audited
  return unless @new_formula_inclusive
  return unless @core_tap

  return if formula.bottle_disabled?

  return unless formula.bottle_defined?

  new_formula_problem "New formulae in homebrew/core should not have a `bottle do` block"
end

#audit_conflicts ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 320

def audit_conflicts
  formula.conflicts.each do |c|
    Formulary.factory(c.name)
  rescue TapFormulaUnavailableError
    # Don't complain about missing cross-tap conflicts.
    next
  rescue FormulaUnavailableError
    problem "Can't find conflicting formula #{c.name.inspect}."
  rescue TapFormulaAmbiguityError, TapFormulaWithOldnameAmbiguityError
    problem "Ambiguous conflicting formula #{c.name.inspect}."
  end
end

#audit_deps ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 213

def audit_deps
  @specs.each do |spec|
    # Check for things we don't like to depend on.
    # We allow non-Homebrew installs whenever possible.
    spec.deps.each do |dep|
      begin
        dep_f = dep.to_formula
      rescue TapFormulaUnavailableError
        # Don't complain about missing cross-tap dependencies
        next
      rescue FormulaUnavailableError
        problem "Can't find dependency #{dep.name.inspect}."
        next
      rescue TapFormulaAmbiguityError
        problem "Ambiguous dependency #{dep.name.inspect}."
        next
      rescue TapFormulaWithOldnameAmbiguityError
        problem "Ambiguous oldname dependency #{dep.name.inspect}."
        next
      end

      if dep_f.oldname && dep.name.split("/").last == dep_f.oldname
        problem "Dependency '#{dep.name}' was renamed; use new name '#{dep_f.name}'."
      end

      if @core_tap &&
         @new_formula &&
         dep_f.keg_only? &&
         dep_f.keg_only_reason.provided_by_macos? &&
         dep_f.keg_only_reason.applicable? &&
         !tap_audit_exception(:provided_by_macos_depends_on_allowlist, dep.name)
        new_formula_problem(
          "Dependency '#{dep.name}' is provided by macOS; " \
          "please replace 'depends_on' with 'uses_from_macos'.",
        )
      end

      dep.options.each do |opt|
        next if @core_tap
        next if dep_f.option_defined?(opt)
        next if dep_f.requirements.find do |r|
          if r.recommended?
            opt.name == "with-#{r.name}"
          elsif r.optional?
            opt.name == "without-#{r.name}"
          end
        end

        problem "Dependency #{dep} does not define option #{opt.name.inspect}"
      end

      problem "Don't use git as a dependency (it's always available)" if @new_formula && dep.name == "git"

      problem "Dependency '#{dep.name}' is marked as :run. Remove :run; it is a no-op." if dep.tags.include?(:run)

      next unless @core_tap

      if self.class.aliases.include?(dep.name)
        problem "Dependency '#{dep.name}' is an alias; use the canonical name '#{dep.to_formula.full_name}'."
      end

      if dep.tags.include?(:recommended) || dep.tags.include?(:optional)
        problem "Formulae in homebrew/core should not have optional or recommended dependencies"
      end
    end

    next unless @core_tap

    if spec.requirements.map(&:recommended?).any? || spec.requirements.map(&:optional?).any?
      problem "Formulae in homebrew/core should not have optional or recommended requirements"
    end
  end

  return unless @core_tap
  return if tap_audit_exception :versioned_dependencies_conflicts_allowlist, formula.name

  # The number of conflicts on Linux is absurd.
  # TODO: remove this and check these there too.
  return if OS.linux?

  recursive_runtime_formulae = formula.runtime_formula_dependencies(undeclared: false)
  version_hash = {}
  version_conflicts = Set.new
  recursive_runtime_formulae.each do |f|
    name = f.name
    unversioned_name, = name.split("@")
    version_hash[unversioned_name] ||= Set.new
    version_hash[unversioned_name] << name
    next if version_hash[unversioned_name].length < 2

    version_conflicts += version_hash[unversioned_name]
  end

  return if version_conflicts.empty?

  return if formula.disabled?

  return if formula.deprecated? &&
            formula.deprecation_reason != DeprecateDisable::DEPRECATE_DISABLE_REASONS[:versioned_formula]

  problem <<~EOS
    #{formula.full_name} contains conflicting version recursive dependencies:
      #{version_conflicts.to_a.join ", "}
    View these with `brew deps --tree #{formula.full_name}`.
  EOS
end

#audit_file ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 55

def audit_file
  if formula.core_formula? && @versioned_formula
    unversioned_formula = begin
      # build this ourselves as we want e.g. homebrew/core to be present
      full_name = if formula.tap
        "#{formula.tap}/#{formula.name}"
      else
        formula.name
      end
      Formulary.factory(full_name.gsub(/@.*$/, "")).path
    rescue FormulaUnavailableError, TapFormulaAmbiguityError,
           TapFormulaWithOldnameAmbiguityError
      Pathname.new formula.path.to_s.gsub(/@.*\.rb$/, ".rb")
    end
    unless unversioned_formula.exist?
      unversioned_name = unversioned_formula.basename(".rb")
      problem "#{formula} is versioned but no #{unversioned_name} formula exists"
    end
  elsif @build_stable &&
        formula.stable? &&
        !@versioned_formula &&
        (versioned_formulae = formula.versioned_formulae - [formula]) &&
        versioned_formulae.present?
    versioned_aliases = formula.aliases.grep(/.@\d/)
    _, last_alias_version = versioned_formulae.map(&:name).last.split("@")
    alias_name_major = "#{formula.name}@#{formula.version.major}"
    alias_name_major_minor = "#{alias_name_major}.#{formula.version.minor}"
    alias_name = if last_alias_version.split(".").length == 1
      alias_name_major
    else
      alias_name_major_minor
    end
    valid_alias_names = [alias_name_major, alias_name_major_minor]

    unless @core_tap
      versioned_aliases.map! { |a| "#{formula.tap}/#{a}" }
      valid_alias_names.map! { |a| "#{formula.tap}/#{a}" }
    end

    # Fix naming based on what people expect.
    if alias_name_major_minor == "adoptopenjdk@1.8"
      valid_alias_names << "adoptopenjdk@8"
      valid_alias_names.delete "adoptopenjdk@1"
    end

    valid_versioned_aliases = versioned_aliases & valid_alias_names
    invalid_versioned_aliases = versioned_aliases - valid_alias_names

    if valid_versioned_aliases.empty?
      if formula.tap
        problem <<~EOS
          Formula has other versions so create a versioned alias:
            cd #{formula.tap.alias_dir}
            ln -s #{formula.path.to_s.gsub(formula.tap.path, "..")} #{alias_name}
        EOS
      else
        problem "Formula has other versions so create an alias named #{alias_name}."
      end
    end

    if invalid_versioned_aliases.present?
      problem <<~EOS
        Formula has invalid versioned aliases:
          #{invalid_versioned_aliases.join("\n  ")}
      EOS
    end
  end
end

#audit_formula_name ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 129

def audit_formula_name
  return unless @strict
  return unless @core_tap

  name = formula.name

  problem "'#{name}' is not allowed in homebrew/core." if MissingFormula.disallowed_reason(name)

  if Formula.aliases.include? name
    problem "Formula name conflicts with existing aliases in homebrew/core."
    return
  end

  if oldname = CoreTap.instance.formula_renames[name]
    problem "'#{name}' is reserved as the old name of #{oldname} in homebrew/core."
    return
  end

  return if formula.core_formula?
  return unless Formula.core_names.include?(name)

  problem "Formula name conflicts with existing core formula."
end

#audit_github_repository ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 431

def audit_github_repository
  user, repo = get_repo_data(%r{https?://github\.com/([^/]+)/([^/]+)/?.*}) if @new_formula

  return if user.blank?

  warning = SharedAudits.github(user, repo)
  return if warning.nil?

  new_formula_problem warning
end

#audit_github_repository_archived ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 407

def audit_github_repository_archived
  return if formula.deprecated?

  user, repo = get_repo_data(%r{https?://github\.com/([^/]+)/([^/]+)/?.*}) if @online
  return if user.blank?

  metadata = SharedAudits.github_repo_data(user, repo)
  return if metadata.nil?

  problem "GitHub repo is archived" if metadata["archived"]
end

#audit_gitlab_repository ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 442

def audit_gitlab_repository
  user, repo = get_repo_data(%r{https?://gitlab\.com/([^/]+)/([^/]+)/?.*}) if @new_formula
  return if user.blank?

  warning = SharedAudits.gitlab(user, repo)
  return if warning.nil?

  new_formula_problem warning
end

#audit_gitlab_repository_archived ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 419

def audit_gitlab_repository_archived
  return if formula.deprecated?

  user, repo = get_repo_data(%r{https?://gitlab\.com/([^/]+)/([^/]+)/?.*}) if @online
  return if user.blank?

  metadata = SharedAudits.gitlab_repo_data(user, repo)
  return if metadata.nil?

  problem "GitLab repo is archived" if metadata["archived"]
end

#audit_homepage ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 365

def audit_homepage
  homepage = formula.homepage

  return if homepage.blank?

  return unless @online

  return if tap_audit_exception :cert_error_allowlist, formula.name, homepage

  return unless DevelopmentTools.curl_handles_most_https_certificates?

  if http_content_problem = curl_check_http_content(homepage,
                                                    user_agents:   [:browser, :default],
                                                    check_content: true,
                                                    strict:        @strict)
    problem http_content_problem
  end
end

#audit_license ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 161

def audit_license
  if formula.license.present?
    licenses, exceptions = SPDX.parse_license_expression formula.license

    non_standard_licenses = licenses.reject { |license| SPDX.valid_license? license }
    if non_standard_licenses.present?
      problem <<~EOS
        Formula #{formula.name} contains non-standard SPDX licenses: #{non_standard_licenses}.
        For a list of valid licenses check: #{Formatter.url("https://spdx.org/licenses/")}
      EOS
    end

    if @strict
      deprecated_licenses = licenses.select do |license|
        SPDX.deprecated_license? license
      end
      if deprecated_licenses.present?
        problem <<~EOS
          Formula #{formula.name} contains deprecated SPDX licenses: #{deprecated_licenses}.
          You may need to add `-only` or `-or-later` for GNU licenses (e.g. `GPL`, `LGPL`, `AGPL`, `GFDL`).
          For a list of valid licenses check: #{Formatter.url("https://spdx.org/licenses/")}
        EOS
      end
    end

    invalid_exceptions = exceptions.reject { |exception| SPDX.valid_license_exception? exception }
    if invalid_exceptions.present?
      problem <<~EOS
        Formula #{formula.name} contains invalid or deprecated SPDX license exceptions: #{invalid_exceptions}.
        For a list of valid license exceptions check:
          #{Formatter.url("https://spdx.org/licenses/exceptions-index.html")}
      EOS
    end

    return unless @online

    user, repo = get_repo_data(%r{https?://github\.com/([^/]+)/([^/]+)/?.*})
    return if user.blank?

    github_license = GitHub.get_repo_license(user, repo)
    return unless github_license
    return if (licenses + ["NOASSERTION"]).include?(github_license)
    return if PERMITTED_LICENSE_MISMATCHES[github_license]&.any? { |license| licenses.include? license }
    return if tap_audit_exception :permitted_formula_license_mismatches, formula.name

    problem "Formula license #{licenses} does not match GitHub license #{Array(github_license)}."

  elsif @new_formula && @core_tap
    problem "Formulae in homebrew/core must specify a license."
  end
end

#audit_postgresql ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 333

def audit_postgresql
  return unless formula.name == "postgresql"
  return unless @core_tap

  major_version = formula.version.major.to_i
  previous_major_version = major_version - 1
  previous_formula_name = "postgresql@#{previous_major_version}"
  begin
    Formula[previous_formula_name]
  rescue FormulaUnavailableError
    problem "Versioned #{previous_formula_name} in homebrew/core must be created for " \
            "`brew-postgresql-upgrade-database` and `pg_upgrade` to work."
  end
end

#audit_prefix_has_contents ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 701

def audit_prefix_has_contents
  return unless formula.prefix.directory?
  return unless Keg.new(formula.prefix).empty_installation?

  problem <<~EOS
    The installation seems to be empty. Please ensure the prefix
    is set correctly and expected files are installed.
    The prefix configure/make argument may be case-sensitive.
  EOS
end

#audit_reverse_migration ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 688

def audit_reverse_migration
  # Only enforce for new formula being re-added to core
  return unless @strict
  return unless @core_tap
  return unless formula.tap.tap_migrations.key?(formula.name)

  problem <<~EOS
    #{formula.name} seems to be listed in tap_migrations.json!
    Please remove #{formula.name} from present tap & tap_migrations.json
    before submitting it to Homebrew/homebrew-#{formula.tap.repo}.
  EOS
end

#audit_revision_and_version_scheme ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 580

def audit_revision_and_version_scheme
  return unless @git
  return unless formula.tap # skip formula not from core or any taps
  return unless formula.tap.git? # git log is required
  return if formula.stable.blank?

  fv = FormulaVersions.new(formula)

  current_version = formula.stable.version
  current_checksum = formula.stable.checksum
  current_version_scheme = formula.version_scheme
  current_revision = formula.revision
  current_url = formula.stable.url

  previous_version = nil
  previous_version_scheme = nil
  previous_revision = nil

  newest_committed_version = nil
  newest_committed_checksum = nil
  newest_committed_revision = nil
  newest_committed_url = nil

  fv.rev_list("origin/master") do |rev|
    begin
      fv.formula_at_revision(rev) do |f|
        stable = f.stable
        next if stable.blank?

        previous_version = stable.version
        previous_checksum = stable.checksum
        previous_version_scheme = f.version_scheme
        previous_revision = f.revision

        newest_committed_version ||= previous_version
        newest_committed_checksum ||= previous_checksum
        newest_committed_revision ||= previous_revision
        newest_committed_url ||= stable.url
      end
    rescue MacOSVersionError
      break
    end

    break if previous_version && current_version != previous_version
    break if previous_revision && current_revision != previous_revision
  end

  if current_version == newest_committed_version &&
     current_url == newest_committed_url &&
     current_checksum != newest_committed_checksum &&
     current_checksum.present? && newest_committed_checksum.present?
    problem(
      "stable sha256 changed without the url/version also changing; " \
      "please create an issue upstream to rule out malicious " \
      "circumstances and to find out why the file changed.",
    )
  end

  if !newest_committed_version.nil? &&
     current_version < newest_committed_version &&
     current_version_scheme == previous_version_scheme
    problem "stable version should not decrease (from #{newest_committed_version} to #{current_version})"
  end

  unless previous_version_scheme.nil?
    if current_version_scheme < previous_version_scheme
      problem "version_scheme should not decrease (from #{previous_version_scheme} " \
              "to #{current_version_scheme})"
    elsif current_version_scheme > (previous_version_scheme + 1)
      problem "version_schemes should only increment by 1"
    end
  end

  if (previous_version != newest_committed_version ||
     current_version != newest_committed_version) &&
     !current_revision.zero? &&
     current_revision == newest_committed_revision &&
     current_revision == previous_revision
    problem "'revision #{current_revision}' should be removed"
  elsif current_version == previous_version &&
        !previous_revision.nil? &&
        current_revision < previous_revision
    problem "revision should not decrease (from #{previous_revision} to #{current_revision})"
  elsif newest_committed_revision &&
        current_revision > (newest_committed_revision + 1)
    problem "revisions should only increment by 1"
  end
end

#audit_specs ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 476

def audit_specs
  problem "Head-only (no stable download)" if head_only?(formula)

  %w[Stable HEAD].each do |name|
    spec_name = name.downcase.to_sym
    next unless spec = formula.send(spec_name)

    ra = ResourceAuditor.new(spec, spec_name, online: @online, strict: @strict).audit
    ra.problems.each do |message|
      problem "#{name}: #{message}"
    end

    spec.resources.each_value do |resource|
      problem "Resource name should be different from the formula name" if resource.name == formula.name

      ra = ResourceAuditor.new(resource, spec_name, online: @online, strict: @strict).audit
      ra.problems.each do |message|
        problem "#{name} resource #{resource.name.inspect}: #{message}"
      end
    end

    next if spec.patches.empty?
    next if !@new_formula || !@core_tap

    new_formula_problem(
      "Formulae should not require patches to build. " \
      "Patches should be submitted and accepted upstream first.",
    )
  end

  if stable = formula.stable
    version = stable.version
    problem "Stable: version (#{version}) is set to a string without a digit" if version.to_s !~ /\d/
    if version.to_s.start_with?("HEAD")
      problem "Stable: non-HEAD version name (#{version}) should not begin with HEAD"
    end
  end

  return unless @core_tap

  if formula.head && @versioned_formula &&
     !tap_audit_exception(:versioned_head_spec_allowlist, formula.name)
    problem "Versioned formulae should not have a `HEAD` spec"
  end

  stable = formula.stable
  return unless stable
  return unless stable.url

  stable_version_string = stable.version.to_s
  stable_url_version = Version.parse(stable.url)
  stable_url_minor_version = stable_url_version.minor.to_i

  formula_suffix = stable.version.patch.to_i
  throttled_rate = tap_audit_exception(:throttled_formulae, formula.name)
  if throttled_rate && formula_suffix.modulo(throttled_rate).nonzero?
    problem "should only be updated every #{throttled_rate} releases on multiples of #{throttled_rate}"
  end

  case (url = stable.url)
  when /[\d._-](alpha|beta|rc\d)/
    matched = Regexp.last_match(1)
    version_prefix = stable_version_string.sub(/\d+$/, "")
    return if tap_audit_exception :unstable_allowlist, formula.name, version_prefix
    return if tap_audit_exception :unstable_devel_allowlist, formula.name, version_prefix

    problem "Stable version URLs should not contain #{matched}"
  when %r{download\.gnome\.org/sources}, %r{ftp\.gnome\.org/pub/GNOME/sources}i
    version_prefix = stable.version.major_minor
    return if tap_audit_exception :gnome_devel_allowlist, formula.name, version_prefix
    return if stable_url_version < Version.create("1.0")
    return if stable_url_minor_version.even?

    problem "#{stable.version} is a development release"
  when %r{isc.org/isc/bind\d*/}i
    return if stable_url_minor_version.even?

    problem "#{stable.version} is a development release"

  when %r{https?://gitlab\.com/([\w-]+)/([\w-]+)}
    owner = Regexp.last_match(1)
    repo = Regexp.last_match(2)

    tag = SharedAudits.gitlab_tag_from_url(url)
    tag ||= stable.specs[:tag]
    tag ||= stable.version

    if @online
      error = SharedAudits.gitlab_release(owner, repo, tag, formula: formula)
      problem error if error
    end
  when %r{^https://github.com/([\w-]+)/([\w-]+)}
    owner = Regexp.last_match(1)
    repo = Regexp.last_match(2)
    tag = SharedAudits.github_tag_from_url(url)
    tag ||= formula.stable.specs[:tag]

    if @online
      error = SharedAudits.github_release(owner, repo, tag, formula: formula)
      problem error if error
    end
  end
end

#audit_style ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 42

def audit_style
  return unless @style_offenses

  @style_offenses.each do |offense|
    correction_status = "#{Tty.green}[Corrected]#{Tty.reset} " if offense.corrected?

    cop_name = "#{offense.cop_name}: " if @display_cop_names
    message = "#{cop_name}#{correction_status}#{offense.message}"

    problem message, location: offense.location
  end
end

#audit_text ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 669

def audit_text
  bin_names = Set.new
  bin_names << formula.name
  bin_names += formula.aliases
  [formula.bin, formula.sbin].each do |dir|
    next unless dir.exist?

    bin_names += dir.children.map(&:basename).map(&:to_s)
  end
  shell_commands = ["system", "shell_output", "pipe_output"]
  bin_names.each do |name|
    shell_commands.each do |cmd|
      if text.to_s.match?(/test do.*#{cmd}[(\s]+['"]#{Regexp.escape(name)}[\s'"]/m)
        problem %Q(fully scope test #{cmd} calls, e.g. #{cmd} "\#{bin}/#{name}")
      end
    end
  end
end

#audit_versioned_keg_only ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 348

def audit_versioned_keg_only
  return unless @versioned_formula
  return unless @core_tap

  if formula.keg_only?
    return if formula.keg_only_reason.versioned_formula?
    if formula.name.start_with?("openssl", "libressl") &&
       formula.keg_only_reason.by_macos?
      return
    end
  end

  return if tap_audit_exception :versioned_keg_only_allowlist, formula.name

  problem "Versioned formulae in homebrew/core should use `keg_only :versioned_formula`"
end

#get_repo_data(regex) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 462

def get_repo_data(regex)
  return unless @core_tap
  return unless @online

  _, user, repo = *regex.match(formula.stable.url) if formula.stable
  _, user, repo = *regex.match(formula.homepage) unless user
  _, user, repo = *regex.match(formula.head.url) if !user && formula.head
  return if !user || !repo

  repo.delete_suffix!(".git")

  [user, repo]
end

#problem_if_output(output) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 716

def problem_if_output(output)
  problem(output) if output
end

#quote_dep(dep) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'brew/Library/Homebrew/formula_auditor.rb', line 712

def quote_dep(dep)
  dep.is_a?(Symbol) ? dep.inspect : "'#{dep}'"
end