Class: Homebrew::Diagnostic::Checks Private

Inherits:
Object
  • Object
show all
Defined in:
Library/Homebrew/diagnostic.rb,
Library/Homebrew/extend/os/mac/diagnostic.rb,
Library/Homebrew/extend/os/linux/diagnostic.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.

Diagnostic checks.

HELPERS collapse

Instance Method Summary collapse

Constructor Details

#initialize(verbose: true) ⇒ Checks

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 Checks.


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# File 'Library/Homebrew/diagnostic.rb', line 51

def initialize(verbose: true)
  @verbose = verbose
end

Instance Method Details

#__check_linked_brew(f) ⇒ 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 'Library/Homebrew/diagnostic.rb', line 594

def __check_linked_brew(f)
  f.installed_prefixes.each do |prefix|
    prefix.find do |src|
      next if src == prefix

      dst = HOMEBREW_PREFIX + src.relative_path_from(prefix)
      return true if dst.symlink? && src == dst.resolved_path
    end
  end

  false
end

#__check_stray_files(dir, pattern, allow_list, message) ⇒ 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 'Library/Homebrew/diagnostic.rb', line 181

def __check_stray_files(dir, pattern, allow_list, message)
  return unless File.directory?(dir)

  files = Dir.chdir(dir) do
    (Dir.glob(pattern) - Dir.glob(allow_list))
      .select { |f| File.file?(f) && !File.symlink?(f) }
      .map { |f| File.join(dir, f) }
  end
  return if files.empty?

  inject_file_list(files.sort, message)
end

#add_info(*args) ⇒ 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 'Library/Homebrew/diagnostic.rb', line 78

def add_info(*args)
  ohai(*args) if @verbose
end

#all ⇒ 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 'Library/Homebrew/diagnostic.rb', line 1008

def all
  methods.map(&:to_s).grep(/^check_/)
end

#build_error_checks ⇒ 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 'Library/Homebrew/diagnostic.rb', line 107

def build_error_checks
  supported_configuration_checks + build_from_source_checks
end

#build_from_source_checks ⇒ 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 'Library/Homebrew/diagnostic.rb', line 103

def build_from_source_checks
  [].freeze
end

#cask_checks ⇒ 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 'Library/Homebrew/diagnostic.rb', line 1012

def cask_checks
  all.grep(/^check_cask_/)
end

#check_access_directories ⇒ 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 'Library/Homebrew/diagnostic.rb', line 353

def check_access_directories
  not_writable_dirs =
    Keg::MUST_BE_WRITABLE_DIRECTORIES.select(&:exist?)
                                     .reject(&:writable_real?)
  return if not_writable_dirs.empty?

  <<~EOS
    The following directories are not writable by your user:
    #{not_writable_dirs.join("\n")}

    You should change the ownership of these directories to your user.
      sudo chown -R $(whoami) #{not_writable_dirs.join(" ")}

    And make sure that your user has write permission.
      chmod u+w #{not_writable_dirs.join(" ")}
  EOS
end

#check_brew_git_origin ⇒ 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 'Library/Homebrew/diagnostic.rb', line 550

def check_brew_git_origin
  examine_git_origin(HOMEBREW_REPOSITORY, Homebrew::EnvConfig.brew_git_remote)
end

#check_cask_environment_variables ⇒ 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 'Library/Homebrew/diagnostic.rb', line 942

def check_cask_environment_variables
  environment_variables = %w[
    RUBYLIB
    RUBYOPT
    RUBYPATH
    RBENV_VERSION
    CHRUBY_VERSION
    GEM_HOME
    GEM_PATH
    BUNDLE_PATH
    PATH
    SHELL
    HOMEBREW_CASK_OPTS
  ]

  locale_variables = ENV.keys.grep(/^(?:LC_\S+|LANG|LANGUAGE)\Z/).sort

  add_info "Cask Environment Variables:", ((locale_variables + environment_variables).sort.each do |var|
    next unless ENV.key?(var)

    var = %Q(#{var}="#{ENV[var]}")
    user_tilde(var)
  end)
end

#check_cask_install_location ⇒ 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 'Library/Homebrew/diagnostic.rb', line 884

def check_cask_install_location
  locations = Dir.glob(HOMEBREW_CELLAR.join("brew-cask", "*")).reverse
  return if locations.empty?

  locations.map do |l|
    "Legacy install at #{l}. Run `brew uninstall --force brew-cask`."
  end.join "\n"
end

#check_cask_load_path ⇒ 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 'Library/Homebrew/diagnostic.rb', line 934

def check_cask_load_path
  paths = $LOAD_PATH.map(&method(:user_tilde))

  add_info "$LOAD_PATHS", paths.presence || none_string

  "$LOAD_PATH is empty" if paths.blank?
end

#check_cask_quarantine_support ⇒ 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 'Library/Homebrew/diagnostic.rb', line 993

def check_cask_quarantine_support
  case Cask::Quarantine.check_quarantine_support
  when :quarantine_available
    nil
  when :xattr_broken
    "There's not a working version of xattr."
  when :no_swift
    "Swift is not available on this system."
  when :no_quarantine
    "This feature requires the macOS 10.10 SDK or higher."
  else
    "Unknown support status"
  end
end

#check_cask_software_versions ⇒ 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 'Library/Homebrew/diagnostic.rb', line 861

def check_cask_software_versions
  add_info "Homebrew Version", HOMEBREW_VERSION
  add_info "macOS", MacOS.full_version
  add_info "SIP", begin
    csrutil = "/usr/bin/csrutil"
    if File.executable?(csrutil)
      Open3.capture2(csrutil, "status")
           .first
           .gsub("This is an unsupported configuration, likely to break in " \
                 "the future and leave your machine in an unknown state.", "")
           .gsub("System Integrity Protection status: ", "")
           .delete("\t\.")
           .capitalize
           .strip
    else
      "N/A"
    end
  end
  add_info "Java", SystemConfig.describe_java

  nil
end

#check_cask_staging_location ⇒ 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 'Library/Homebrew/diagnostic.rb', line 893

def check_cask_staging_location
  # Skip this check when running CI since the staging path is not writable for security reasons
  return if ENV["GITHUB_ACTIONS"]

  path = Cask::Caskroom.path

  add_info "Homebrew Cask Staging Location", user_tilde(path.to_s)

  return unless path.exist? && !path.writable?

  <<~EOS
    The staging path #{user_tilde(path.to_s)} is not writable by the current user.
    To fix, run \'sudo chown -R $(whoami):staff #{user_tilde(path.to_s)}'
  EOS
end

#check_cask_taps ⇒ 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 'Library/Homebrew/diagnostic.rb', line 909

def check_cask_taps
  default_tap = Tap.default_cask_tap
  alt_taps = Tap.select { |t| t.cask_dir.exist? && t != default_tap }

  error_tap_paths = []

  add_info "Homebrew Cask Taps:", ([default_tap, *alt_taps].map do |tap|
    if tap.path.blank?
      none_string
    else
      cask_count = begin
        tap.cask_files.count
      rescue
        error_tap_paths << tap.path
        0
      end

      "#{tap.path} (#{cask_count} #{"cask".pluralize(cask_count)})"
    end
  end)

  taps = "tap".pluralize error_tap_paths.count
  "Unable to read from cask #{taps}: #{error_tap_paths.to_sentence}" if error_tap_paths.present?
end

#check_cask_xattr ⇒ 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 'Library/Homebrew/diagnostic.rb', line 967

def check_cask_xattr
  result = system_command "/usr/bin/xattr"

  return if result.status.success?

  if result.stderr.include? "ImportError: No module named pkg_resources"
    result = Utils.popen_read "/usr/bin/python", "--version", err: :out

    if result.include? "Python 2.7"
      <<~EOS
        Your Python installation has a broken version of setuptools.
        To fix, reinstall macOS or run 'sudo /usr/bin/python -m pip install -I setuptools'.
      EOS
    else
      <<~EOS
        The system Python version is wrong.
        To fix, run 'defaults write com.apple.versioner.python Version 2.7'.
      EOS
    end
  elsif result.stderr.include? "pkg_resources.DistributionNotFound"
    "Your Python installation is unable to find xattr."
  else
    "unknown xattr error: #{result.stderr.split("\n").last}"
  end
end

#check_casktap_git_origin ⇒ 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 'Library/Homebrew/diagnostic.rb', line 558

def check_casktap_git_origin
  cask_tap = Tap.default_cask_tap
  return unless cask_tap.installed?

  examine_git_origin(cask_tap.path, cask_tap.remote)
end

#check_clt_minimum_version ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 172

def check_clt_minimum_version
  return unless MacOS::CLT.below_minimum_version?

  <<~EOS
    Your Command Line Tools are too outdated.
    #{MacOS::CLT.update_instructions}
  EOS
end

#check_clt_up_to_date ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 144

def check_clt_up_to_date
  return unless MacOS::CLT.outdated?

  # CI images are going to end up outdated so don't complain when
  # `brew test-bot` runs `brew doctor` in the CI for the Homebrew/brew
  # repository. This only needs to support whatever CI providers
  # Homebrew/brew is currently using.
  return if ENV["GITHUB_ACTIONS"]

  <<~EOS
    A newer Command Line Tools release is available.
    #{MacOS::CLT.update_instructions}
  EOS
end

#check_coretap_git_branch ⇒ 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 'Library/Homebrew/diagnostic.rb', line 565

def check_coretap_git_branch
  return if ENV["CI"]

  coretap_path = CoreTap.instance.path
  return if !Utils::Git.available? || !(coretap_path/".git").exist?

  branch = coretap_path.git_branch
  return if branch.blank? || branch.include?("master")

  <<~EOS
    #{CoreTap.instance.full_name} is not on the master branch.

    Check out the master branch by running:
      git -C "$(brew --repo homebrew/core)" checkout master
  EOS
end

#check_coretap_git_origin ⇒ 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 'Library/Homebrew/diagnostic.rb', line 554

def check_coretap_git_origin
  examine_git_origin(CoreTap.instance.path, Homebrew::EnvConfig.core_git_remote)
end

#check_deleted_formula ⇒ 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 'Library/Homebrew/diagnostic.rb', line 844

def check_deleted_formula
  kegs = Keg.all
  deleted_formulae = []
  kegs.each do |keg|
    keg_name = keg.name
    deleted_formulae << keg_name if Formulary.tap_paths(keg_name).blank?
  end
  return if deleted_formulae.blank?

  <<~EOS
    Some installed kegs have no formulae!
    This means they were either deleted or installed with `brew diy`.
    You should find replacements for the following formulae:
      #{deleted_formulae.join("\n  ")}
  EOS
end

#check_deprecated_caskroom_taps ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 398

def check_deprecated_caskroom_taps
  tapped_caskroom_taps = Tap.select { |t| t.user == "caskroom" || t.name == "phinze/cask" }
                            .map(&:name)
  return if tapped_caskroom_taps.empty?

  <<~EOS
    You have the following deprecated, cask taps tapped:
      #{tapped_caskroom_taps.join("\n  ")}
    Untap them with `brew untap`.
  EOS
end

#check_deprecated_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 'Library/Homebrew/diagnostic.rb', line 653

def check_deprecated_disabled
  return unless HOMEBREW_CELLAR.exist?

  deprecated_or_disabled = Formula.installed.select(&:deprecated?)
  deprecated_or_disabled += Formula.installed.select(&:disabled?)
  return if deprecated_or_disabled.empty?

  <<~EOS
    Some installed formulae are deprecated or disabled.
    You should find replacements for the following formulae:
      #{deprecated_or_disabled.sort_by(&:full_name).uniq * "\n  "}
  EOS
end

#check_deprecated_official_taps ⇒ 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 'Library/Homebrew/diagnostic.rb', line 582

def check_deprecated_official_taps
  tapped_deprecated_taps =
    Tap.select(&:official?).map(&:repo) & DEPRECATED_OFFICIAL_TAPS
  return if tapped_deprecated_taps.empty?

  <<~EOS
    You have the following deprecated, official taps tapped:
      Homebrew/homebrew-#{tapped_deprecated_taps.join("\n  Homebrew/homebrew-")}
    Untap them with `brew untap`.
  EOS
end

#check_exist_directories ⇒ 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 'Library/Homebrew/diagnostic.rb', line 339

def check_exist_directories
  not_exist_dirs = Keg::MUST_EXIST_DIRECTORIES.reject(&:exist?)
  return if not_exist_dirs.empty?

  <<~EOS
    The following directories do not exist:
    #{not_exist_dirs.join("\n")}

    You should create these directories and change their ownership to your account.
      sudo mkdir -p #{not_exist_dirs.join(" ")}
      sudo chown -R $(whoami) #{not_exist_dirs.join(" ")}
  EOS
end

#check_filesystem_case_sensitive ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 262

def check_filesystem_case_sensitive
  dirs_to_check = [
    HOMEBREW_PREFIX,
    HOMEBREW_REPOSITORY,
    HOMEBREW_CELLAR,
    HOMEBREW_TEMP,
  ]
  case_sensitive_dirs = dirs_to_check.select do |dir|
    # We select the dir as being case-sensitive if either the UPCASED or the
    # downcased variant is missing.
    # Of course, on a case-insensitive fs, both exist because the os reports so.
    # In the rare situation when the user has indeed a downcased and an upcased
    # dir (e.g. /TMP and /tmp) this check falsely thinks it is case-insensitive
    # but we don't care because: 1. there is more than one dir checked, 2. the
    # check is not vital and 3. we would have to touch files otherwise.
    upcased = Pathname.new(dir.to_s.upcase)
    downcased = Pathname.new(dir.to_s.downcase)
    dir.exist? && !(upcased.exist? && downcased.exist?)
  end
  return if case_sensitive_dirs.empty?

  volumes = Volumes.new
  case_sensitive_vols = case_sensitive_dirs.map do |case_sensitive_dir|
    volumes.get_mounts(case_sensitive_dir)
  end
  case_sensitive_vols.uniq!

  <<~EOS
    The filesystem on #{case_sensitive_vols.join(",")} appears to be case-sensitive.
    The default macOS filesystem is case-insensitive. Please report any apparent problems.
  EOS
end

#check_for_anaconda ⇒ 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.

Anaconda installs multiple system & brew dupes, including OpenSSL, Python, sqlite, libpng, Qt, etc. Regularly breaks compile on Vim, MacVim and others. Is flagged as part of the *-config script checks below, but people seem to ignore those as warnings rather than extremely likely breakage.


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# File 'Library/Homebrew/diagnostic.rb', line 159

def check_for_anaconda
  return unless which("anaconda")
  return unless which("python")

  anaconda_directory = which("anaconda").realpath.dirname
  python_binary = Utils.popen_read(which("python"), "-c", "import sys; sys.stdout.write(sys.executable)")
  python_directory = Pathname.new(python_binary).realpath.dirname

  # Only warn if Python lives with Anaconda, since is most problematic case.
  return unless python_directory == anaconda_directory

  <<~EOS
    Anaconda is known to frequently break Homebrew builds, including Vim and
    MacVim, due to bundling many duplicates of system and Homebrew-provided
    tools.

    If you encounter a build failure please temporarily remove Anaconda
    from your $PATH and attempt the build again prior to reporting the
    failure to us. Thanks!
  EOS
end

#check_for_bad_python_symlink ⇒ 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 'Library/Homebrew/diagnostic.rb', line 701

def check_for_bad_python_symlink
  return unless which "python"

  `python -V 2>&1` =~ /Python (\d+)\./
  # This won't be the right warning if we matched nothing at all
  return if Regexp.last_match(1).nil?
  return if Regexp.last_match(1) == "2"

  <<~EOS
    python is symlinked to python#{Regexp.last_match(1)}
    This will confuse build scripts and in general lead to subtle breakage.
  EOS
end

#check_for_bitdefender ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 352

def check_for_bitdefender
  if !Pathname("/Library/Bitdefender/AVP/EndpointSecurityforMac.app").exist? &&
     !Pathname("/Library/Bitdefender/AVP/BDLDaemon").exist?
    return
  end

  <<~EOS
    You have installed Bitdefender. The "Traffic Scan" option interferes with
    Homebrew's ability to download packages. See:
      #{Formatter.url("https://github.com/Homebrew/brew/issues/5558")}
  EOS
end

#check_for_broken_symlinks ⇒ 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 'Library/Homebrew/diagnostic.rb', line 311

def check_for_broken_symlinks
  broken_symlinks = []

  Keg::MUST_EXIST_SUBDIRECTORIES.each do |d|
    next unless d.directory?

    d.find do |path|
      broken_symlinks << path if path.symlink? && !path.resolved_path_exists?
    end
  end
  return if broken_symlinks.empty?

  inject_file_list broken_symlinks, <<~EOS
    Broken symlinks were found. Remove them with `brew cleanup`:
  EOS
end

#check_for_config_scripts ⇒ 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 'Library/Homebrew/diagnostic.rb', line 448

def check_for_config_scripts
  return unless HOMEBREW_CELLAR.exist?

  real_cellar = HOMEBREW_CELLAR.realpath

  scripts = []

  allowlist = %W[
    /bin /sbin
    /usr/bin /usr/sbin
    /usr/X11/bin /usr/X11R6/bin /opt/X11/bin
    #{HOMEBREW_PREFIX}/bin #{HOMEBREW_PREFIX}/sbin
    /Applications/Server.app/Contents/ServerRoot/usr/bin
    /Applications/Server.app/Contents/ServerRoot/usr/sbin
  ].map(&:downcase)

  paths.each do |p|
    next if allowlist.include?(p.downcase) || !File.directory?(p)

    realpath = Pathname.new(p).realpath.to_s
    next if realpath.start_with?(real_cellar.to_s, HOMEBREW_CELLAR.to_s)

    scripts += Dir.chdir(p) { Dir["*-config"] }.map { |c| File.join(p, c) }
  end

  return if scripts.empty?

  inject_file_list scripts, <<~EOS
    "config" scripts exist outside your system or Homebrew directories.
    `./configure` scripts often look for *-config scripts to determine if
    software packages are installed, and which additional flags to use when
    compiling and linking.

    Having additional scripts in your path can confuse software installed via
    Homebrew if the config script overrides a system or Homebrew-provided
    script of the same name. We found the following "config" scripts:
  EOS
end

#check_for_external_cmd_name_conflict ⇒ 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 'Library/Homebrew/diagnostic.rb', line 780

def check_for_external_cmd_name_conflict
  cmds = Tap.cmd_directories.flat_map { |p| Dir["#{p}/brew-*"] }.uniq
  cmds = cmds.select { |cmd| File.file?(cmd) && File.executable?(cmd) }
  cmd_map = {}
  cmds.each do |cmd|
    cmd_name = File.basename(cmd, ".rb")
    cmd_map[cmd_name] ||= []
    cmd_map[cmd_name] << cmd
  end
  cmd_map.reject! { |_cmd_name, cmd_paths| cmd_paths.size == 1 }
  return if cmd_map.empty?

  if ENV["CI"] && cmd_map.keys.length == 1 &&
     cmd_map.keys.first == "brew-test-bot"
    return
  end

  message = "You have external commands with conflicting names.\n"
  cmd_map.each do |cmd_name, cmd_paths|
    message += inject_file_list cmd_paths, <<~EOS
      Found command `#{cmd_name}` in the following places:
    EOS
  end

  message
end

#check_for_gettext ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 295

def check_for_gettext
  find_relative_paths("lib/libgettextlib.dylib",
                      "lib/libintl.dylib",
                      "include/libintl.h")
  return if @found.empty?

  # Our gettext formula will be caught by check_linked_keg_only_brews
  gettext = begin
    Formulary.factory("gettext")
  rescue
    nil
  end

  if gettext&.linked_keg&.directory?
    homebrew_owned = @found.all? do |path|
      Pathname.new(path).realpath.to_s.start_with? "#{HOMEBREW_CELLAR}/gettext"
    end
    return if homebrew_owned
  end

  inject_file_list @found, <<~EOS
    gettext files detected at a system prefix.
    These files can cause compilation and link failures, especially if they
    are compiled with improper architectures. Consider removing these files:
  EOS
end

#check_for_git ⇒ 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 'Library/Homebrew/diagnostic.rb', line 521

def check_for_git
  return if Utils::Git.available?

  <<~EOS
    Git could not be found in your PATH.
    Homebrew uses Git for several internal functions, and some formulae use Git
    checkouts instead of stable tarballs. You may want to install Git:
      brew install git
  EOS
end

#check_for_iconv ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 322

def check_for_iconv
  find_relative_paths("lib/libiconv.dylib", "include/iconv.h")
  return if @found.empty?

  libiconv = begin
    Formulary.factory("libiconv")
  rescue
    nil
  end
  if libiconv&.linked_keg&.directory?
    unless libiconv.keg_only?
      <<~EOS
        A libiconv formula is installed and linked.
        This will break stuff. For serious. Unlink it.
      EOS
    end
  else
    inject_file_list @found, <<~EOS
      libiconv files detected at a system prefix other than /usr.
      Homebrew doesn't provide a libiconv formula, and expects to link against
      the system version in /usr. libiconv in other prefixes can cause
      compile or link failure, especially if compiled with improper
      architectures. macOS itself never installs anything to /usr/local so
      it was either installed by a user or some other third party software.

      tl;dr: delete these files:
    EOS
  end
end

#check_for_installed_developer_tools ⇒ 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 'Library/Homebrew/diagnostic.rb', line 146

def check_for_installed_developer_tools
  return if DevelopmentTools.installed?

  <<~EOS
    No developer tools installed.
    #{DevelopmentTools.installation_instructions}
  EOS
end

#check_for_multiple_volumes ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 365

def check_for_multiple_volumes
  return unless HOMEBREW_CELLAR.exist?

  volumes = Volumes.new

  # Find the volumes for the TMP folder & HOMEBREW_CELLAR
  real_cellar = HOMEBREW_CELLAR.realpath
  where_cellar = volumes.which real_cellar

  begin
    tmp = Pathname.new(Dir.mktmpdir("doctor", HOMEBREW_TEMP))
    begin
      real_tmp = tmp.realpath.parent
      where_tmp = volumes.which real_tmp
    ensure
      Dir.delete tmp
    end
  rescue
    return
  end

  return if where_cellar == where_tmp

  <<~EOS
    Your Cellar and TEMP directories are on different volumes.
    macOS won't move relative symlinks across volumes unless the target file already
    exists. Brews known to be affected by this are Git and Narwhal.

    You should set the "HOMEBREW_TEMP" environment variable to a suitable
    directory on the same volume as your Cellar.
  EOS
end

#check_for_non_prefixed_coreutils ⇒ 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 'Library/Homebrew/diagnostic.rb', line 715

def check_for_non_prefixed_coreutils
  coreutils = Formula["coreutils"]
  return unless coreutils.any_version_installed?

  gnubin = %W[#{coreutils.opt_libexec}/gnubin #{coreutils.libexec}/gnubin]
  return if (paths & gnubin).empty?

  <<~EOS
    Putting non-prefixed coreutils in your path can cause gmp builds to fail.
  EOS
rescue FormulaUnavailableError
  nil
end

#check_for_non_prefixed_findutils ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 78

def check_for_non_prefixed_findutils
  findutils = Formula["findutils"]
  return unless findutils.any_version_installed?

  gnubin = %W[#{findutils.opt_libexec}/gnubin #{findutils.libexec}/gnubin]
  default_names = Tab.for_name("findutils").with? "default-names"
  return if !default_names && (paths & gnubin).empty?

  <<~EOS
    Putting non-prefixed findutils in your path can cause python builds to fail.
  EOS
rescue FormulaUnavailableError
  nil
end

#check_for_other_frameworks ⇒ 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 'Library/Homebrew/diagnostic.rb', line 607

def check_for_other_frameworks
  # Other frameworks that are known to cause problems when present
  frameworks_to_check = %w[
    expat.framework
    libexpat.framework
    libcurl.framework
  ]
  frameworks_found = frameworks_to_check
                     .map { |framework| "/Library/Frameworks/#{framework}" }
                     .select { |framework| File.exist? framework }
  return if frameworks_found.empty?

  inject_file_list frameworks_found, <<~EOS
    Some frameworks can be picked up by CMake's build system and will likely
    cause the build to fail. To compile CMake, you may wish to move these
    out of the way:
  EOS
end

#check_for_pydistutils_cfg_in_home ⇒ 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 'Library/Homebrew/diagnostic.rb', line 729

def check_for_pydistutils_cfg_in_home
  return unless File.exist? "#{ENV["HOME"]}/.pydistutils.cfg"

  <<~EOS
    A .pydistutils.cfg file was found in $HOME, which may cause Python
    builds to fail. See:
      #{Formatter.url("https://bugs.python.org/issue6138")}
      #{Formatter.url("https://bugs.python.org/issue4655")}
  EOS
end

#check_for_stray_dylibs ⇒ 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 'Library/Homebrew/diagnostic.rb', line 194

def check_for_stray_dylibs
  # Dylibs which are generally OK should be added to this list,
  # with a short description of the software they come with.
  allow_list = [
    "libfuse.2.dylib", # MacFuse
    "libfuse_ino64.2.dylib", # MacFuse
    "libmacfuse_i32.2.dylib", # OSXFuse MacFuse compatibility layer
    "libmacfuse_i64.2.dylib", # OSXFuse MacFuse compatibility layer
    "libosxfuse_i32.2.dylib", # OSXFuse
    "libosxfuse_i64.2.dylib", # OSXFuse
    "libosxfuse.2.dylib", # OSXFuse
    "libTrAPI.dylib", # TrAPI/Endpoint Security VPN
    "libntfs-3g.*.dylib", # NTFS-3G
    "libntfs.*.dylib", # NTFS-3G
    "libublio.*.dylib", # NTFS-3G
    "libUFSDNTFS.dylib", # Paragon NTFS
    "libUFSDExtFS.dylib", # Paragon ExtFS
    "libecomlodr.dylib", # Symantec Endpoint Protection
    "libsymsea*.dylib", # Symantec Endpoint Protection
    "sentinel.dylib", # SentinelOne
    "sentinel-*.dylib", # SentinelOne
  ]

  __check_stray_files "/usr/local/lib", "*.dylib", allow_list, <<~EOS
    Unbrewed dylibs were found in /usr/local/lib.
    If you didn't put them there on purpose they could cause problems when
    building Homebrew formulae, and may need to be deleted.

    Unexpected dylibs:
  EOS
end

#check_for_stray_headers ⇒ 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 'Library/Homebrew/diagnostic.rb', line 292

def check_for_stray_headers
  allow_list = [
    "fuse.h", # MacFuse
    "fuse/**/*.h", # MacFuse
    "macfuse/**/*.h", # OSXFuse MacFuse compatibility layer
    "osxfuse/**/*.h", # OSXFuse
    "ntfs/**/*.h", # NTFS-3G
    "ntfs-3g/**/*.h", # NTFS-3G
  ]

  __check_stray_files "/usr/local/include", "**/*.h", allow_list, <<~EOS
    Unbrewed header files were found in /usr/local/include.
    If you didn't put them there on purpose they could cause problems when
    building Homebrew formulae, and may need to be deleted.

    Unexpected header files:
  EOS
end

#check_for_stray_las ⇒ 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 'Library/Homebrew/diagnostic.rb', line 271

def check_for_stray_las
  allow_list = [
    "libfuse.la", # MacFuse
    "libfuse_ino64.la", # MacFuse
    "libosxfuse_i32.la", # OSXFuse
    "libosxfuse_i64.la", # OSXFuse
    "libosxfuse.la", # OSXFuse
    "libntfs-3g.la", # NTFS-3G
    "libntfs.la", # NTFS-3G
    "libublio.la", # NTFS-3G
  ]

  __check_stray_files "/usr/local/lib", "*.la", allow_list, <<~EOS
    Unbrewed .la files were found in /usr/local/lib.
    If you didn't put them there on purpose they could cause problems when
    building Homebrew formulae, and may need to be deleted.

    Unexpected .la files:
  EOS
end

#check_for_stray_pcs ⇒ 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 'Library/Homebrew/diagnostic.rb', line 251

def check_for_stray_pcs
  # Package-config files which are generally OK should be added to this list,
  # with a short description of the software they come with.
  allow_list = [
    "fuse.pc", # OSXFuse/MacFuse
    "macfuse.pc", # OSXFuse MacFuse compatibility layer
    "osxfuse.pc", # OSXFuse
    "libntfs-3g.pc", # NTFS-3G
    "libublio.pc", # NTFS-3G
  ]

  __check_stray_files "/usr/local/lib/pkgconfig", "*.pc", allow_list, <<~EOS
    Unbrewed .pc files were found in /usr/local/lib/pkgconfig.
    If you didn't put them there on purpose they could cause problems when
    building Homebrew formulae, and may need to be deleted.

    Unexpected .pc files:
  EOS
end

#check_for_stray_static_libs ⇒ 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 'Library/Homebrew/diagnostic.rb', line 226

def check_for_stray_static_libs
  # Static libs which are generally OK should be added to this list,
  # with a short description of the software they come with.
  allow_list = [
    "libntfs-3g.a", # NTFS-3G
    "libntfs.a", # NTFS-3G
    "libublio.a", # NTFS-3G
    "libappfirewall.a", # Symantec Endpoint Protection
    "libautoblock.a", # Symantec Endpoint Protection
    "libautosetup.a", # Symantec Endpoint Protection
    "libconnectionsclient.a", # Symantec Endpoint Protection
    "liblocationawareness.a", # Symantec Endpoint Protection
    "libpersonalfirewall.a", # Symantec Endpoint Protection
    "libtrustedcomponents.a", # Symantec Endpoint Protection
  ]

  __check_stray_files "/usr/local/lib", "*.a", allow_list, <<~EOS
    Unbrewed static libraries were found in /usr/local/lib.
    If you didn't put them there on purpose they could cause problems when
    building Homebrew formulae, and may need to be deleted.

    Unexpected static libraries:
  EOS
end

#check_for_symlinked_cellar ⇒ 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 'Library/Homebrew/diagnostic.rb', line 487

def check_for_symlinked_cellar
  return unless HOMEBREW_CELLAR.exist?
  return unless HOMEBREW_CELLAR.symlink?

  <<~EOS
    Symlinked Cellars can cause problems.
    Your Homebrew Cellar is a symlink: #{HOMEBREW_CELLAR}
                    which resolves to: #{HOMEBREW_CELLAR.realpath}

    The recommended Homebrew installations are either:
    (A) Have Cellar be a real directory inside of your HOMEBREW_PREFIX
    (B) Symlink "bin/brew" into your prefix, but don't symlink "Cellar".

    Older installations of Homebrew may have created a symlinked Cellar, but this can
    cause problems when two formulae install to locations that are mapped on top of each
    other during the linking step.
  EOS
end

#check_for_tap_ruby_files_locations ⇒ 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 'Library/Homebrew/diagnostic.rb', line 807

def check_for_tap_ruby_files_locations
  bad_tap_files = {}
  Tap.each do |tap|
    unused_formula_dirs = tap.potential_formula_dirs - [tap.formula_dir]
    unused_formula_dirs.each do |dir|
      next unless dir.exist?

      dir.children.each do |path|
        next unless path.extname == ".rb"

        bad_tap_files[tap] ||= []
        bad_tap_files[tap] << path
      end
    end
  end
  return if bad_tap_files.empty?

  bad_tap_files.keys.map do |tap|
    <<~EOS
      Found Ruby file outside #{tap} tap formula directory.
      (#{tap.formula_dir}):
        #{bad_tap_files[tap].join("\n  ")}
    EOS
  end.join("\n")
end

#check_for_unlinked_but_not_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 'Library/Homebrew/diagnostic.rb', line 759

def check_for_unlinked_but_not_keg_only
  unlinked = Formula.racks.reject do |rack|
    if !(HOMEBREW_LINKED_KEGS/rack.basename).directory?
      begin
        Formulary.from_rack(rack).keg_only?
      rescue FormulaUnavailableError, TapFormulaAmbiguityError, TapFormulaWithOldnameAmbiguityError
        false
      end
    else
      true
    end
  end.map(&:basename)
  return if unlinked.empty?

  inject_file_list unlinked, <<~EOS
    You have unlinked kegs in your Cellar.
    Leaving kegs unlinked can lead to build-trouble and cause brews that depend on
    those kegs to fail to run properly once built. Run `brew link` on these:
  EOS
end

#check_for_unreadable_installed_formula ⇒ 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 'Library/Homebrew/diagnostic.rb', line 740

def check_for_unreadable_installed_formula
  formula_unavailable_exceptions = []
  Formula.racks.each do |rack|
    Formulary.from_rack(rack)
  rescue FormulaUnreadableError, FormulaClassUnavailableError,
         TapFormulaUnreadableError, TapFormulaClassUnavailableError => e
    formula_unavailable_exceptions << e
  rescue FormulaUnavailableError,
         TapFormulaAmbiguityError, TapFormulaWithOldnameAmbiguityError
    nil
  end
  return if formula_unavailable_exceptions.empty?

  <<~EOS
    Some installed formulae are not readable:
      #{formula_unavailable_exceptions.join("\n\n  ")}
  EOS
end

#check_for_unsupported_macos ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 93

def check_for_unsupported_macos
  return if Homebrew::EnvConfig.developer?

  # TODO: remove when Big Sur is released.
  return if MacOS.version == :big_sur && ENV["HOMEBREW_GITHUB_ACTIONS_BIG_SUR_TESTING"]

  who = +"We"
  if OS::Mac.prerelease?
    what = "pre-release version"
  elsif OS::Mac.outdated_release?
    who << " (and Apple)"
    what = "old version"
  else
    return
  end
  who.freeze

  <<~EOS
    You are using macOS #{MacOS.version}.
    #{who} do not provide support for this #{what}.
    #{please_create_pull_requests(what)}
  EOS
end

#check_git_newline_settings ⇒ 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 'Library/Homebrew/diagnostic.rb', line 532

def check_git_newline_settings
  return unless Utils::Git.available?

  autocrlf = HOMEBREW_REPOSITORY.cd { `git config --get core.autocrlf`.chomp }
  return unless autocrlf == "true"

  <<~EOS
    Suspicious Git newline settings found.

    The detected Git newline settings will cause checkout problems:
      core.autocrlf = #{autocrlf}

    If you are not routinely dealing with Windows-based projects,
    consider removing these by running:
      git config --global core.autocrlf input
  EOS
end

#check_git_status ⇒ 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 'Library/Homebrew/diagnostic.rb', line 667

def check_git_status
  return unless Utils::Git.available?

  message = nil

  {
    "Homebrew/brew"          => HOMEBREW_REPOSITORY,
    "Homebrew/homebrew-core" => CoreTap.instance.path,
  }.each do |name, path|
    status = path.cd do
      `git status --untracked-files=all --porcelain 2>/dev/null`
    end
    next if status.blank?

    message ||= ""
    message += "\n" unless message.empty?
    message += <<~EOS
      You have uncommitted modifications to #{name}.
      If this is a surprise to you, then you should stash these modifications.
      Stashing returns Homebrew to a pristine state but can be undone
      should you later need to do so for some reason.
        cd #{path} && git stash && git clean -d -f
    EOS

    modified = status.split("\n")
    message += inject_file_list modified, <<~EOS

      Uncommitted files:
    EOS
  end

  message
end

#check_git_version ⇒ 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 'Library/Homebrew/diagnostic.rb', line 506

def check_git_version
  minimum_version = ENV["HOMEBREW_MINIMUM_GIT_VERSION"]
  return unless Utils::Git.available?
  return if Version.create(Utils::Git.version) >= Version.create(minimum_version)

  git = Formula["git"]
  git_upgrade_cmd = git.any_version_installed? ? "upgrade" : "install"
  <<~EOS
    An outdated version (#{Utils::Git.version}) of Git was detected in your PATH.
    Git #{minimum_version} or newer is required for Homebrew.
    Please upgrade:
      brew #{git_upgrade_cmd} git
  EOS
end

#check_glibc_minimum_version ⇒ 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 'Library/Homebrew/extend/os/linux/diagnostic.rb', line 86

def check_glibc_minimum_version
  return unless OS::Linux::Glibc.below_minimum_version?

  <<~EOS
    Your system glibc #{OS::Linux::Glibc.system_version} is too old.
    We only support glibc #{OS::Linux::Glibc.minimum_version} or later.
    #{please_create_pull_requests}
    We recommend updating to a newer version via your distribution's
    package manager, upgrading your distribution to the latest version,
    or changing distributions.
  EOS
end

#check_homebrew_prefix ⇒ 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 'Library/Homebrew/diagnostic.rb', line 833

def check_homebrew_prefix
  return if Homebrew.default_prefix?

  <<~EOS
    Your Homebrew's prefix is not #{Homebrew::DEFAULT_PREFIX}.
    Some of Homebrew's bottles (binary packages) can only be used with the default
    prefix (#{Homebrew::DEFAULT_PREFIX}).
    #{please_create_pull_requests}
  EOS
end

#check_if_supported_sdk_available ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 410

def check_if_supported_sdk_available
  return unless MacOS.sdk_root_needed?
  return if MacOS.sdk

  locator = MacOS.sdk_locator

  source = if locator.source == :clt
    "CLT"
  else
    "Xcode"
  end

  <<~EOS
    Your #{source} does not support macOS #{MacOS.version}.
    It is either outdated or was modified.
    Please update your #{source} or delete it if no updates are available.
  EOS
end

#check_if_xcode_needs_clt_installed ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 181

def check_if_xcode_needs_clt_installed
  return unless MacOS::Xcode.needs_clt_installed?

  <<~EOS
    Xcode alone is not sufficient on #{MacOS.version.pretty_name}.
    #{DevelopmentTools.installation_instructions}
  EOS
end

#check_kernel_minimum_version ⇒ 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 'Library/Homebrew/extend/os/linux/diagnostic.rb', line 99

def check_kernel_minimum_version
  return unless OS::Linux::Kernel.below_minimum_version?

  <<~EOS
    Your Linux kernel #{OS.kernel_version} is too old.
    We only support kernel #{OS::Linux::Kernel.minimum_version} or later.
    You will be unable to use binary packages (bottles).
    #{please_create_pull_requests}
    We recommend updating to a newer version via your distribution's
    package manager, upgrading your distribution to the latest version,
    or changing distributions.
  EOS
end

#check_missing_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 'Library/Homebrew/diagnostic.rb', line 635

def check_missing_deps
  return unless HOMEBREW_CELLAR.exist?

  missing = Set.new
  Homebrew::Diagnostic.missing_deps(Formula.installed).each_value do |deps|
    missing.merge(deps)
  end
  return if missing.empty?

  <<~EOS
    Some installed formulae are missing dependencies.
    You should `brew install` the missing dependencies:
      brew install #{missing.sort_by(&:full_name) * " "}

    Run `brew missing` for more details.
  EOS
end

#check_multiple_cellars ⇒ 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 'Library/Homebrew/diagnostic.rb', line 371

def check_multiple_cellars
  return if HOMEBREW_PREFIX.to_s == HOMEBREW_REPOSITORY.to_s
  return unless (HOMEBREW_REPOSITORY/"Cellar").exist?
  return unless (HOMEBREW_PREFIX/"Cellar").exist?

  <<~EOS
    You have multiple Cellars.
    You should delete #{HOMEBREW_REPOSITORY}/Cellar:
      rm -rf #{HOMEBREW_REPOSITORY}/Cellar
  EOS
end

#check_ruby_version ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 190

def check_ruby_version
  return if RUBY_VERSION == HOMEBREW_REQUIRED_RUBY_VERSION
  return if Homebrew::EnvConfig.developer? && OS::Mac.prerelease?

  <<~EOS
    Ruby version #{RUBY_VERSION} is unsupported on #{MacOS.version}. Homebrew
    is developed and tested on Ruby #{HOMEBREW_REQUIRED_RUBY_VERSION}, and may not work correctly
    on other Rubies. Patches are accepted as long as they don't cause breakage
    on supported Rubies.
  EOS
end

#check_supported_architecture ⇒ 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 'Library/Homebrew/extend/os/linux/diagnostic.rb', line 76

def check_supported_architecture
  return if Hardware::CPU.arch == :x86_64

  <<~EOS
    Your CPU architecture (#{Hardware::CPU.arch}) is not supported. We only support
    x86_64 CPU architectures. You will be unable to use binary packages (bottles).
    #{please_create_pull_requests}
  EOS
end

#check_tmpdir ⇒ 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 'Library/Homebrew/diagnostic.rb', line 626

def check_tmpdir
  tmpdir = ENV["TMPDIR"]
  return if tmpdir.nil? || File.directory?(tmpdir)

  <<~EOS
    TMPDIR #{tmpdir.inspect} doesn't exist.
  EOS
end

#check_tmpdir_executable ⇒ 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 'Library/Homebrew/extend/os/linux/diagnostic.rb', line 34

def check_tmpdir_executable
  f = Tempfile.new(%w[homebrew_check_tmpdir_executable .sh], HOMEBREW_TEMP)
  f.write "#!/bin/sh\n"
  f.chmod 0700
  f.close
  return if system f.path

  <<~EOS
    The directory #{HOMEBREW_TEMP} does not permit executing
    programs. It is likely mounted as "noexec". Please set HOMEBREW_TEMP
    in your #{shell_profile} to a different directory, for example:
      export HOMEBREW_TEMP=~/tmp
      echo 'export HOMEBREW_TEMP=~/tmp' >> #{shell_profile}
  EOS
ensure
  f.unlink
end

#check_tmpdir_sticky_bit ⇒ 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 'Library/Homebrew/diagnostic.rb', line 328

def check_tmpdir_sticky_bit
  world_writable = HOMEBREW_TEMP.stat.mode & 0777 == 0777
  return if !world_writable || HOMEBREW_TEMP.sticky?

  <<~EOS
    #{HOMEBREW_TEMP} is world-writable but does not have the sticky bit set.
    Please execute `sudo chmod +t #{HOMEBREW_TEMP}` in your Terminal.
  EOS
end

#check_umask_not_zero ⇒ 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 'Library/Homebrew/extend/os/linux/diagnostic.rb', line 65

def check_umask_not_zero
  return unless File.umask.zero?

  <<~EOS
    umask is currently set to 000. Directories created by Homebrew cannot
    be world-writable. This issue can be resolved by adding "umask 002" to
    your #{shell_profile}:
      echo 'umask 002' >> #{shell_profile}
  EOS
end

#check_user_path_1 ⇒ 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 'Library/Homebrew/diagnostic.rb', line 383

def check_user_path_1
  @seen_prefix_bin = false
  @seen_prefix_sbin = false

  message = ""

  paths.each do |p|
    case p
    when "/usr/bin"
      unless @seen_prefix_bin
        # only show the doctor message if there are any conflicts
        # rationale: a default install should not trigger any brew doctor messages
        conflicts = Dir["#{HOMEBREW_PREFIX}/bin/*"]
                    .map { |fn| File.basename fn }
                    .select { |bn| File.exist? "/usr/bin/#{bn}" }

        unless conflicts.empty?
          message = inject_file_list conflicts, <<~EOS
            /usr/bin occurs before #{HOMEBREW_PREFIX}/bin
            This means that system-provided programs will be used instead of those
            provided by Homebrew. Consider setting your PATH so that
            #{HOMEBREW_PREFIX}/bin occurs before /usr/bin. Here is a one-liner:
              #{Utils::Shell.prepend_path_in_profile("#{HOMEBREW_PREFIX}/bin")}

            The following tools exist at both paths:
          EOS
        end
      end
    when "#{HOMEBREW_PREFIX}/bin"
      @seen_prefix_bin = true
    when "#{HOMEBREW_PREFIX}/sbin"
      @seen_prefix_sbin = true
    end
  end

  message unless message.empty?
end

#check_user_path_2 ⇒ 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 'Library/Homebrew/diagnostic.rb', line 421

def check_user_path_2
  return if @seen_prefix_bin

  <<~EOS
    Homebrew's bin was not found in your PATH.
    Consider setting the PATH for example like so:
      #{Utils::Shell.prepend_path_in_profile("#{HOMEBREW_PREFIX}/bin")}
  EOS
end

#check_user_path_3 ⇒ 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 'Library/Homebrew/diagnostic.rb', line 431

def check_user_path_3
  return if @seen_prefix_sbin

  # Don't complain about sbin not being in the path if it doesn't exist
  sbin = HOMEBREW_PREFIX/"sbin"
  return unless sbin.directory?
  return if sbin.children.empty?
  return if sbin.children.one? && sbin.children.first.basename.to_s == ".keepme"

  <<~EOS
    Homebrew's sbin was not found in your PATH but you have installed
    formulae that put executables in #{HOMEBREW_PREFIX}/sbin.
    Consider setting the PATH for example like so:
      #{Utils::Shell.prepend_path_in_profile("#{HOMEBREW_PREFIX}/sbin")}
  EOS
end

#check_xcode_license_approved ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 238

def check_xcode_license_approved
  # If the user installs Xcode-only, they have to approve the
  # license or no "xc*" tool will work.
  return unless `/usr/bin/xcrun clang 2>&1`.include?("license")
  return if $CHILD_STATUS.success?

  <<~EOS
    You have not agreed to the Xcode license.
    Agree to the license by opening Xcode.app or running:
      sudo xcodebuild -license
  EOS
end

#check_xcode_minimum_version ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 159

def check_xcode_minimum_version
  return unless MacOS::Xcode.below_minimum_version?

  xcode = MacOS::Xcode.version.to_s
  xcode += " => #{MacOS::Xcode.prefix}" unless MacOS::Xcode.default_prefix?

  <<~EOS
    Your Xcode (#{xcode}) is too outdated.
    Please update to Xcode #{MacOS::Xcode.latest_version} (or delete it).
    #{MacOS::Xcode.update_instructions}
  EOS
end

#check_xcode_prefix ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 202

def check_xcode_prefix
  prefix = MacOS::Xcode.prefix
  return if prefix.nil?
  return unless prefix.to_s.include?(" ")

  <<~EOS
    Xcode is installed to a directory with a space in the name.
    This will cause some formulae to fail to build.
  EOS
end

#check_xcode_prefix_exists ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 213

def check_xcode_prefix_exists
  prefix = MacOS::Xcode.prefix
  return if prefix.nil? || prefix.exist?

  <<~EOS
    The directory Xcode is reportedly installed to doesn't exist:
      #{prefix}
    You may need to `xcode-select` the proper path if you have moved Xcode.
  EOS
end

#check_xcode_select_path ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 224

def check_xcode_select_path
  return if MacOS::CLT.installed?
  return unless MacOS::Xcode.installed?
  return if File.file?("#{MacOS.active_developer_dir}/usr/bin/xcodebuild")

  path = MacOS::Xcode.bundle_path
  path = "/Developer" if path.nil? || !path.directory?
  <<~EOS
    Your Xcode is configured with an invalid path.
    You should change it to the correct path:
      sudo xcode-select -switch #{path}
  EOS
end

#check_xcode_up_to_date ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 117

def check_xcode_up_to_date
  return unless MacOS::Xcode.outdated?

  # CI images are going to end up outdated so don't complain when
  # `brew test-bot` runs `brew doctor` in the CI for the Homebrew/brew
  # repository. This only needs to support whatever CI providers
  # Homebrew/brew is currently using.
  return if ENV["GITHUB_ACTIONS"]

  message = <<~EOS
    Your Xcode (#{MacOS::Xcode.version}) is outdated.
    Please update to Xcode #{MacOS::Xcode.latest_version} (or delete it).
    #{MacOS::Xcode.update_instructions}
  EOS

  if OS::Mac.prerelease?
    current_path = Utils.popen_read("/usr/bin/xcode-select", "-p")
    message += <<~EOS
      If #{MacOS::Xcode.latest_version} is installed, you may need to:
        sudo xcode-select --switch /Applications/Xcode.app
      Current developer directory is:
        #{current_path}
    EOS
  end
  message
end

#check_xdg_data_dirs ⇒ 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 'Library/Homebrew/extend/os/linux/diagnostic.rb', line 52

def check_xdg_data_dirs
  return if ENV["XDG_DATA_DIRS"].blank?
  return if ENV["XDG_DATA_DIRS"].split("/").include?(HOMEBREW_PREFIX/"share")

  <<~EOS
    Homebrew's share was not found in your XDG_DATA_DIRS but you have
    this variable set to include other locations.
    Some programs like `vapigen` may not work correctly.
    Consider adding Homebrew's share directory to XDG_DATA_DIRS like so:
      echo 'export XDG_DATA_DIRS="#{HOMEBREW_PREFIX}/share:$XDG_DATA_DIRS"' >> #{shell_profile}
  EOS
end

#check_xquartz_up_to_date ⇒ 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 'Library/Homebrew/extend/os/mac/diagnostic.rb', line 251

def check_xquartz_up_to_date
  return unless MacOS::XQuartz.outdated?

  <<~EOS
    Your XQuartz (#{MacOS::XQuartz.version}) is outdated.
    Please install XQuartz #{MacOS::XQuartz.latest_version} (or delete the current version).
    XQuartz can be updated using Homebrew Cask by running:
      brew reinstall xquartz
  EOS
end

#examine_git_origin(repository_path, desired_origin) ⇒ 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 'Library/Homebrew/diagnostic.rb', line 120

def examine_git_origin(repository_path, desired_origin)
  return if !Utils::Git.available? || !repository_path.git?

  current_origin = repository_path.git_origin

  if current_origin.nil?
    <<~EOS
      Missing #{desired_origin} git origin remote.

      Without a correctly configured origin, Homebrew won't update
      properly. You can solve this by adding the remote:
        git -C "#{repository_path}" remote add origin #{Formatter.url(desired_origin)}
    EOS
  elsif !current_origin.match?(%r{#{desired_origin}(\.git|/)?$}i)
    <<~EOS
      Suspicious #{desired_origin} git origin remote found.
      The current git origin is:
        #{current_origin}

      With a non-standard origin, Homebrew won't update properly.
      You can solve this by setting the origin remote:
        git -C "#{repository_path}" remote set-url origin #{Formatter.url(desired_origin)}
    EOS
  end
end

#fatal_build_from_source_checks ⇒ 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 'Library/Homebrew/diagnostic.rb', line 89

def fatal_build_from_source_checks
  %w[
    check_for_installed_developer_tools
  ].freeze
end

#fatal_preinstall_checks ⇒ 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 'Library/Homebrew/diagnostic.rb', line 83

def fatal_preinstall_checks
  %w[
    check_access_directories
  ].freeze
end

#fatal_setup_build_environment_checks ⇒ 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 'Library/Homebrew/diagnostic.rb', line 95

def fatal_setup_build_environment_checks
  [].freeze
end

#find_relative_paths(*relative_paths) ⇒ 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.

Finds files in HOMEBREW_PREFIX and /usr/local. Specify paths relative to a prefix, e.g. "include/foo.h". Sets @found for your convenience.


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# File 'Library/Homebrew/diagnostic.rb', line 59

def find_relative_paths(*relative_paths)
  @found = [HOMEBREW_PREFIX, "/usr/local"].uniq.reduce([]) do |found, prefix|
    found + relative_paths.map { |f| File.join(prefix, f) }.select { |f| File.exist? f }
  end
end

#generic_check_tmpdir_sticky_bit ⇒ 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 'Library/Homebrew/diagnostic.rb', line 337

def check_tmpdir_sticky_bit
  world_writable = HOMEBREW_TEMP.stat.mode & 0777 == 0777
  return if !world_writable || HOMEBREW_TEMP.sticky?

  <<~EOS
    #{HOMEBREW_TEMP} is world-writable but does not have the sticky bit set.
    Please execute `sudo chmod +t #{HOMEBREW_TEMP}` in your Terminal.
  EOS
end

#inject_file_list(list, string) ⇒ 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 'Library/Homebrew/diagnostic.rb', line 65

def inject_file_list(list, string)
  list.reduce(string.dup) { |acc, elem| acc << "  #{elem}\n" }
      .freeze
end

#none_string ⇒ 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 'Library/Homebrew/diagnostic.rb', line 74

def none_string
  "<NONE>"
end

#please_create_pull_requests(what = "unsupported configuration") ⇒ 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 'Library/Homebrew/diagnostic.rb', line 111

def please_create_pull_requests(what = "unsupported configuration")
  <<~EOS
    You will encounter build failures with some formulae.
    Please create pull requests instead of asking for help on Homebrew's GitHub,
    Discourse, Twitter or IRC. You are responsible for resolving any issues you
    experience while you are running this #{what}.
  EOS
end

#supported_configuration_checks ⇒ 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 'Library/Homebrew/diagnostic.rb', line 99

def supported_configuration_checks
  [].freeze
end

#user_tilde(path) ⇒ 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 'Library/Homebrew/diagnostic.rb', line 70

def user_tilde(path)
  path.gsub(ENV["HOME"], "~")
end