Top Level Namespace

Defined Under Namespace

Modules: ArchitectureListExtension, Cachable, Cask, Commands, Context, Debrew, Dependable, DependenciesHelpers, DeprecateDisable, DiskUsageExtension, ELFShim, EnvActivation, Formatter, FormulaCellarChecks, FormulaClassUnavailableErrorModule, FormulaUnreadableErrorModule, Formulary, GitHub, GitRepositoryExtension, Hardware, HashValidator, Homebrew, InstallRenamed, Kernel, Language, LivecheckFormula, MachOShim, Metafiles, OS, Patch, Predicable, PyPI, Readall, Repology, RuboCop, SPDX, Searchable, SharedAudits, SharedEnvExtension, Superenv, SystemConfig, Tty, UnpackStrategy, Utils Classes: AbstractDownloadStrategy, AbstractFileDownloadStrategy, ArchRequirement, BazaarDownloadStrategy, Bintray, Bottle, BottleDisableReason, BottleFormulaUnavailableError, BottleSpecification, Build, BuildEnvironment, BuildError, BuildFlagsError, BuildOptions, BuildToolsError, CVSDownloadStrategy, CacheStore, CacheStoreDatabase, CannotInstallFormulaError, CaskDependent, CaskLock, Caveats, Checksum, ChecksumMismatchError, ChecksumMissingError, ChildProcessError, Cleaner, CodesignRequirement, CompilerFailure, CompilerSelectionError, CompilerSelector, CoreTap, CurlApacheMirrorDownloadStrategy, CurlDownloadStrategy, CurlDownloadStrategyError, CurlPostDownloadStrategy, CxxStdlib, DATAPatch, Dependencies, Dependency, DependencyCollector, DeprecatedOption, DescriptionCacheStore, Descriptions, DownloadError, DownloadStrategyDetector, DuplicateResourceError, EmbeddedPatch, ErrorDuringExecution, ExternalPatch, Formula, FormulaAmbiguousPythonError, FormulaClassUnavailableError, FormulaConflict, FormulaConflictError, FormulaInfo, FormulaInstallationAlreadyAttemptedError, FormulaInstaller, FormulaLock, FormulaOrCaskUnavailableError, FormulaPin, FormulaSpecificationError, FormulaUnavailableError, FormulaUnknownPythonError, FormulaUnreadableError, FormulaUnspecifiedError, FormulaValidationError, FormulaVersions, FossilDownloadStrategy, GitDownloadStrategy, GitHubArtifactDownloadStrategy, GitHubGitDownloadStrategy, HeadSoftwareSpec, HeadVersion, IO, JavaRequirement, Keg, KegOnlyReason, KegUnspecifiedError, LazyObject, LegacyPatch, LinkageCacheStore, LinkageChecker, LinuxRequirement, Livecheck, LocalBottleDownloadStrategy, Locale, LockFile, MacOSRequirement, MacOSVersionError, MercurialDownloadStrategy, Messages, MethodDeprecatedError, Migrator, MissingApplyError, MissingEnvironmentVariables, Mktemp, Module, MultipleVersionsInstalledError, NoSuchKegError, NoUnzipCurlDownloadStrategy, NotAKegError, OperationInProgressError, Option, Options, OsxfuseRequirement, PATH, Pathname, PkgVersion, PourBottleCheck, PrettyListing, Reporter, ReporterHub, Requirement, Requirements, Resource, ResourceMissingError, ResourceStageContext, Sandbox, SoftwareSpec, String, StringInreplaceExtension, StringPatch, SubversionDownloadStrategy, Symbol, SystemCommand, Tab, Tap, TapAlreadyTappedError, TapConfig, TapDependency, TapFormulaAmbiguityError, TapFormulaClassUnavailableError, TapFormulaUnavailableError, TapFormulaUnreadableError, TapFormulaWithOldnameAmbiguityError, TapRemoteMismatchError, TapUnavailableError, TuntapRequirement, URL, UnsatisfiedRequirements, UsageError, User, VCSDownloadStrategy, Version, X11Requirement, XcodeRequirement

Constant Summary collapse

TEST_TIMEOUT_SECONDS =
5 * 60
HOMEBREW_BREW_FILE =

Path to bin/brew main executable in HOMEBREW_PREFIX

Pathname.new(ENV["HOMEBREW_BREW_FILE"]).freeze
HOMEBREW_PREFIX =

Where we link under

Pathname.new(get_env_or_raise("HOMEBREW_PREFIX")).freeze
HOMEBREW_REPOSITORY =

Where .git is found

Pathname.new(get_env_or_raise("HOMEBREW_REPOSITORY"))
.extend(GitRepositoryExtension)
.freeze
HOMEBREW_LIBRARY =

Where we store most of Homebrew, taps, and various metadata

Pathname.new(get_env_or_raise("HOMEBREW_LIBRARY")).freeze
HOMEBREW_SHIMS_PATH =

Where shim scripts for various build and SCM tools are stored

(HOMEBREW_LIBRARY/"Homebrew/shims").freeze
HOMEBREW_DATA_PATH =

Where external data that has been incorporated into Homebrew is stored

(HOMEBREW_LIBRARY/"Homebrew/data").freeze
HOMEBREW_LINKED_KEGS =

Where we store symlinks to currently linked kegs

(HOMEBREW_PREFIX/"var/homebrew/linked").freeze
HOMEBREW_PINNED_KEGS =

Where we store symlinks to currently version-pinned kegs

(HOMEBREW_PREFIX/"var/homebrew/pinned").freeze
HOMEBREW_LOCKS =

Where we store lock files

(HOMEBREW_PREFIX/"var/homebrew/locks").freeze
HOMEBREW_CELLAR =

Where we store built products

Pathname.new(get_env_or_raise("HOMEBREW_CELLAR")).freeze
HOMEBREW_CACHE =

Where downloads (bottles, source tarballs, etc.) are cached

Pathname.new(get_env_or_raise("HOMEBREW_CACHE")).freeze
HOMEBREW_CACHE_FORMULA =

Where brews installed via URL are cached

(HOMEBREW_CACHE/"Formula").freeze
HOMEBREW_LOGS =

Where build, postinstall, and test logs of formulae are written to

Pathname.new(get_env_or_raise("HOMEBREW_LOGS")).expand_path.freeze
HOMEBREW_TEMP =

Must use /tmp instead of TMPDIR because long paths break Unix domain sockets

begin
  tmp = Pathname.new(get_env_or_raise("HOMEBREW_TEMP"))
  tmp.mkpath unless tmp.exist?
  tmp.realpath
end.freeze
HOMEBREW_BOTTLE_DEFAULT_DOMAIN =
ENV["HOMEBREW_BOTTLE_DEFAULT_DOMAIN"]
HOMEBREW_BREW_DEFAULT_GIT_REMOTE =
ENV["HOMEBREW_BREW_DEFAULT_GIT_REMOTE"]
HOMEBREW_CORE_DEFAULT_GIT_REMOTE =
ENV["HOMEBREW_CORE_DEFAULT_GIT_REMOTE"]
HOMEBREW_DEFAULT_CACHE =
ENV["HOMEBREW_DEFAULT_CACHE"]
HOMEBREW_DEFAULT_LOGS =
ENV["HOMEBREW_DEFAULT_LOGS"]
HOMEBREW_DEFAULT_TEMP =
ENV["HOMEBREW_DEFAULT_TEMP"]
HOMEBREW_REQUIRED_RUBY_VERSION =
ARGV.first.freeze
HOMEBREW_PRODUCT =
ENV["HOMEBREW_PRODUCT"]
HOMEBREW_VERSION =
ENV["HOMEBREW_VERSION"]
HOMEBREW_WWW =
"https://brew.sh"
RUBY_PATH =
Pathname.new(RbConfig.ruby).freeze
RUBY_BIN =
RUBY_PATH.dirname.freeze
HOMEBREW_USER_AGENT_CURL =
ENV["HOMEBREW_USER_AGENT_CURL"]
HOMEBREW_USER_AGENT_RUBY =
"#{ENV["HOMEBREW_USER_AGENT"]} ruby/#{RUBY_VERSION}-p#{RUBY_PATCHLEVEL}"
HOMEBREW_USER_AGENT_FAKE_SAFARI =
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/602.4.8 " \
"(KHTML, like Gecko) Version/10.0.3 Safari/602.4.8"
HOMEBREW_DEFAULT_PREFIX =
"/usr/local"
LINUXBREW_DEFAULT_PREFIX =
"/home/linuxbrew/.linuxbrew"
HOMEBREW_PULL_API_REGEX =
%r{https://api\.github\.com/repos/([\w-]+)/([\w-]+)?/pulls/(\d+)}.freeze
HOMEBREW_PULL_OR_COMMIT_URL_REGEX =
%r[https://github\.com/([\w-]+)/([\w-]+)?/(?:pull/(\d+)|commit/[0-9a-fA-F]{4,40})].freeze
HOMEBREW_RELEASES_URL_REGEX =
%r{https://github\.com/([\w-]+)/([\w-]+)?/releases/download/(.+)}.freeze
ORIGINAL_PATHS =
PATH.new(ENV["HOMEBREW_PATH"]).map do |p|
  Pathname.new(p).expand_path
rescue
  nil
end.compact.freeze
HOMEBREW_LIBRARY_PATH =
Pathname(__dir__).realpath.freeze
BUG_REPORTS_URL =
"https://github.com/Homebrew/homebrew-cask#reporting-bugs"
COMMAND_DESC_WIDTH =
80
OPTION_DESC_WIDTH =
43
OFFICIAL_CASK_TAPS =
%w[
  cask
  versions
].freeze
OFFICIAL_CMD_TAPS =
{
  "homebrew/bundle"   => ["bundle"],
  "homebrew/test-bot" => ["test-bot"],
  "homebrew/services" => ["services"],
}.freeze
DEPRECATED_OFFICIAL_TAPS =
%w[
  apache
  binary
  cask-eid
  completions
  devel-only
  dupes
  emacs
  fuse
  games
  gui
  head-only
  livecheck
  nginx
  php
  python
  science
  tex
  versions
  x11
].freeze
HOMEBREW_TAP_FORMULA_REGEX =

match taps’ formulae, e.g. someuser/sometap/someformula

%r{^([\w-]+)/([\w-]+)/([\w+-.@]+)$}.freeze
HOMEBREW_TAP_CASK_REGEX =

match taps’ casks, e.g. someuser/sometap/somecask

%r{^([\w-]+)/([\w-]+)/([a-z0-9\-]+)$}.freeze
HOMEBREW_TAP_DIR_REGEX =

match taps’ directory paths, e.g. HOMEBREW_LIBRARY/Taps/someuser/sometap

%r{#{Regexp.escape(HOMEBREW_LIBRARY)}/Taps/(?<user>[\w-]+)/(?<repo>[\w-]+)}.freeze
HOMEBREW_TAP_PATH_REGEX =

match taps’ formula paths, e.g. HOMEBREW_LIBRARY/Taps/someuser/sometap/someformula

Regexp.new(HOMEBREW_TAP_DIR_REGEX.source + %r{(?:/.*)?$}.source).freeze
HOMEBREW_CASK_TAP_CASK_REGEX =

match official taps’ casks, e.g. homebrew/cask/somecask or homebrew/cask-versions/somecask

%r{^(?:([Cc]askroom)/(cask|versions)|(homebrew)/(cask|cask-[\w-]+))/([\w+-.]+)$}.freeze
HOMEBREW_OFFICIAL_REPO_PREFIXES_REGEX =
/^(home|linux)brew-/.freeze
BOTTLE_ERB =
<<-EOS
  bottle do
    <% if root_url != "#{HOMEBREW_BOTTLE_DEFAULT_DOMAIN}/bottles" %>
    root_url "<%= root_url %>"
    <% end %>
    <% if ![HOMEBREW_DEFAULT_PREFIX, LINUXBREW_DEFAULT_PREFIX].include?(prefix) %>
    prefix "<%= prefix %>"
    <% end %>
    <% if cellar.is_a? Symbol %>
    cellar :<%= cellar %>
    <% elsif ![Homebrew::DEFAULT_CELLAR, "/usr/local/Cellar"].include?(cellar) %>
    cellar "<%= cellar %>"
    <% end %>
    <% if rebuild.positive? %>
    rebuild <%= rebuild %>
    <% end %>
    <% checksums.each do |checksum_type, checksum_values| %>
    <% checksum_values.each do |checksum_value| %>
    <% checksum, macos = checksum_value.shift %>
    <%= checksum_type %> "<%= checksum %>" => :<%= macos %>
    <% end %>
    <% end %>
  end
EOS
MAXIMUM_STRING_MATCHES =
100
HOMEBREW_PATCHELF_RB_WRITE =

enables experimental patchelf.rb write support.

(
  ENV["HOMEBREW_NO_PATCHELF_RB_WRITE"].blank? &&
  (ENV["HOMEBREW_PATCHELF_RB_WRITE"].present? ||
   (ENV["CI"].blank? && ENV["HOMEBREW_DEVELOPER"].present?))
).freeze

Instance Method Summary collapse

Instance Method Details

#curl(*args, print_stdout: true, **options) ⇒ Object



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# File 'brew/Library/Homebrew/utils/curl.rb', line 87

def curl(*args, print_stdout: true, **options)
  result = curl_with_workarounds(*args, print_stdout: print_stdout, **options)
  result.assert_success!
  result
end

#curl_args(*extra_args, show_output: false, user_agent: :default) ⇒ Object



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# File 'brew/Library/Homebrew/utils/curl.rb', line 16

def curl_args(*extra_args, show_output: false, user_agent: :default)
  args = []

  # do not load .curlrc unless requested (must be the first argument)
  args << "--disable" unless Homebrew::EnvConfig.curlrc?

  args << "--globoff"

  args << "--show-error"

  args << "--user-agent" << case user_agent
  when :browser, :fake
    HOMEBREW_USER_AGENT_FAKE_SAFARI
  when :default
    HOMEBREW_USER_AGENT_CURL
  else
    user_agent
  end

  args << "--header" << "Accept-Language: en"

  unless show_output
    args << "--fail"
    args << "--progress-bar" unless Context.current.verbose?
    args << "--verbose" if Homebrew::EnvConfig.curl_verbose?
    args << "--silent" unless $stdout.tty?
  end

  args << "--retry" << Homebrew::EnvConfig.curl_retries

  args + extra_args
end

#curl_check_http_content(url, user_agents: [:default], check_content: false, strict: false) ⇒ Object



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# File 'brew/Library/Homebrew/utils/curl.rb', line 141

def curl_check_http_content(url, user_agents: [:default], check_content: false, strict: false)
  return unless url.start_with? "http"

  details = nil
  user_agent = nil
  hash_needed = url.start_with?("http:")
  user_agents.each do |ua|
    details = curl_http_content_headers_and_checksum(url, hash_needed: hash_needed, user_agent: ua)
    user_agent = ua
    break if http_status_ok?(details[:status])
  end

  unless details[:status]
    # Hack around https://github.com/Homebrew/brew/issues/3199
    return if MacOS.version == :el_capitan

    return "The URL #{url} is not reachable"
  end

  unless http_status_ok?(details[:status])
    return if url_protected_by_cloudflare?(details) || url_protected_by_incapsula?(details)

    return "The URL #{url} is not reachable (HTTP status code #{details[:status]})"
  end

  if url.start_with?("https://") && Homebrew::EnvConfig.no_insecure_redirect? &&
     !details[:final_url].start_with?("https://")
    return "The URL #{url} redirects back to HTTP"
  end

  return unless hash_needed

  secure_url = url.sub "http", "https"
  secure_details =
    curl_http_content_headers_and_checksum(secure_url, hash_needed: true, user_agent: user_agent)

  if !http_status_ok?(details[:status]) ||
     !http_status_ok?(secure_details[:status])
    return
  end

  etag_match = details[:etag] &&
               details[:etag] == secure_details[:etag]
  content_length_match =
    details[:content_length] &&
    details[:content_length] == secure_details[:content_length]
  file_match = details[:file_hash] == secure_details[:file_hash]

  if (etag_match || content_length_match || file_match) &&
     secure_details[:final_url].start_with?("https://") &&
     url.start_with?("http://")
    return "The URL #{url} should use HTTPS rather than HTTP"
  end

  return unless check_content

  no_protocol_file_contents = %r{https?:\\?/\\?/}
  details[:file] = details[:file].gsub(no_protocol_file_contents, "/")
  secure_details[:file] = secure_details[:file].gsub(no_protocol_file_contents, "/")

  # Check for the same content after removing all protocols
  if (details[:file] == secure_details[:file]) &&
     secure_details[:final_url].start_with?("https://") &&
     url.start_with?("http://")
    return "The URL #{url} should use HTTPS rather than HTTP"
  end

  return unless strict

  # Same size, different content after normalization
  # (typical causes: Generated ID, Timestamp, Unix time)
  if details[:file].length == secure_details[:file].length
    return "The URL #{url} may be able to use HTTPS rather than HTTP. Please verify it in a browser."
  end

  lenratio = (100 * secure_details[:file].length / details[:file].length).to_i
  return unless (90..110).cover?(lenratio)

  "The URL #{url} may be able to use HTTPS rather than HTTP. Please verify it in a browser."
end

#curl_download(*args, to: nil, partial: true, **options) ⇒ Object



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# File 'brew/Library/Homebrew/utils/curl.rb', line 93

def curl_download(*args, to: nil, partial: true, **options)
  destination = Pathname(to)
  destination.dirname.mkpath

  if partial
    range_stdout = curl_output("--location", "--range", "0-1",
                               "--dump-header", "-",
                               "--write-out", "%\{http_code}",
                               "--output", "/dev/null", *args, **options).stdout
    headers, _, http_status = range_stdout.partition("\r\n\r\n")

    supports_partial_download = http_status.to_i == 206 # Partial Content
    if supports_partial_download &&
       destination.exist? &&
       destination.size == %r{^.*Content-Range: bytes \d+-\d+/(\d+)\r\n.*$}m.match(headers)&.[](1)&.to_i
      return # We've already downloaded all the bytes
    end
  else
    supports_partial_download = false
  end

  continue_at = if destination.exist? && supports_partial_download
    "-"
  else
    0
  end

  curl("--location", "--remote-time", "--continue-at", continue_at.to_s, "--output", destination, *args, **options)
end

#curl_executableObject



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# File 'brew/Library/Homebrew/utils/curl.rb', line 5

def curl_executable
  @curl ||= [
    ENV["HOMEBREW_CURL"],
    which("curl"),
    "/usr/bin/curl",
  ].compact.map { |c| Pathname(c) }.find(&:executable?)
  raise "no executable curl was found" unless @curl

  @curl
end

#curl_http_content_headers_and_checksum(url, hash_needed: false, user_agent: :default) ⇒ Object



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# File 'brew/Library/Homebrew/utils/curl.rb', line 222

def curl_http_content_headers_and_checksum(url, hash_needed: false, user_agent: :default)
  file = Tempfile.new.tap(&:close)

  max_time = hash_needed ? "600" : "25"
  output, = curl_output(
    "--dump-header", "-", "--output", file.path, "--include", "--location",
    "--connect-timeout", "15", "--max-time", max_time, url,
    user_agent: user_agent
  )

  status_code = :unknown
  while status_code == :unknown || status_code.to_s.start_with?("3")
    headers, _, output = output.partition("\r\n\r\n")
    status_code = headers[%r{HTTP/.* (\d+)}, 1]
    location = headers[/^Location:\s*(.*)$/i, 1]
    final_url = location.chomp if location
  end

  output_hash = Digest::SHA256.file(file.path) if hash_needed

  final_url ||= url

  {
    url:            url,
    final_url:      final_url,
    status:         status_code,
    etag:           headers[%r{ETag: ([wW]/)?"(([^"]|\\")*)"}, 2],
    content_length: headers[/Content-Length: (\d+)/, 1],
    headers:        headers,
    file_hash:      output_hash,
    file:           output,
  }
ensure
  file.unlink
end

#curl_output(*args, **options) ⇒ Object



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# File 'brew/Library/Homebrew/utils/curl.rb', line 123

def curl_output(*args, **options)
  curl_with_workarounds(*args, print_stderr: false, show_output: true, **options)
end

#curl_with_workarounds(*args, secrets: nil, print_stdout: nil, print_stderr: nil, verbose: nil, env: {}, **options) ⇒ Object



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# File 'brew/Library/Homebrew/utils/curl.rb', line 49

def curl_with_workarounds(*args, secrets: nil, print_stdout: nil, print_stderr: nil, verbose: nil, env: {}, **options)
  command_options = {
    secrets:      secrets,
    print_stdout: print_stdout,
    print_stderr: print_stderr,
    verbose:      verbose,
  }.compact

  # SSL_CERT_FILE can be incorrectly set by users or portable-ruby and screw
  # with SSL downloads so unset it here.
  result = system_command curl_executable,
                          args: curl_args(*args, **options),
                          env:  { "SSL_CERT_FILE" => nil }.merge(env),
                          **command_options

  if !result.success? && !args.include?("--http1.1")
    # This is a workaround for https://github.com/curl/curl/issues/1618.
    if result.status.exitstatus == 56 # Unexpected EOF
      out = curl_output("-V").stdout

      # If `curl` doesn't support HTTP2, the exception is unrelated to this bug.
      return result unless out.include?("HTTP2")

      # The bug is fixed in `curl` >= 7.60.0.
      curl_version = out[/curl (\d+(\.\d+)+)/, 1]
      return result if Gem::Version.new(curl_version) >= Gem::Version.new("7.60.0")

      return curl_with_workarounds(*args, "--http1.1", **command_options, **options)
    end

    if result.status.exitstatus == 16 # Error in the HTTP2 framing layer
      return curl_with_workarounds(*args, "--http1.1", **command_options, **options)
    end
  end

  result
end

#get_env_or_raise(env) ⇒ Object



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# File 'brew/Library/Homebrew/config.rb', line 10

def get_env_or_raise(env)
  raise MissingEnvironmentVariables, "#{env} was not exported!" unless ENV[env]

  ENV[env]
end

#http_status_ok?(status) ⇒ Boolean

Returns:

  • (Boolean)


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# File 'brew/Library/Homebrew/utils/curl.rb', line 258

def http_status_ok?(status)
  (100..299).cover?(status.to_i)
end

#superenv?(env) ⇒ Boolean

Returns:

  • (Boolean)


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# File 'brew/Library/Homebrew/extend/ENV.rb', line 9

def superenv?(env)
  env != "std" && Superenv.bin
end

#url_protected_by_cloudflare?(details) ⇒ Boolean

Check if a URL is protected by CloudFlare (e.g. badlion.net and jaxx.io).

Returns:

  • (Boolean)


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# File 'brew/Library/Homebrew/utils/curl.rb', line 128

def url_protected_by_cloudflare?(details)
  [403, 503].include?(details[:status].to_i) &&
    details[:headers].match?(/^Set-Cookie: __cfduid=/i) &&
    details[:headers].match?(/^Server: cloudflare/i)
end

#url_protected_by_incapsula?(details) ⇒ Boolean

Check if a URL is protected by Incapsula (e.g. corsair.com).

Returns:

  • (Boolean)


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# File 'brew/Library/Homebrew/utils/curl.rb', line 135

def url_protected_by_incapsula?(details)
  details[:status].to_i == 403 &&
    details[:headers].match?(/^Set-Cookie: visid_incap_/i) &&
    details[:headers].match?(/^Set-Cookie: incap_ses_/i)
end

#with_monkey_patchObject



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# File 'brew/Library/Homebrew/dev-cmd/extract.rb', line 9

def with_monkey_patch
  BottleSpecification.class_eval do
    alias_method :old_method_missing, :method_missing if method_defined?(:method_missing)
    define_method(:method_missing) { |*| }
  end

  Module.class_eval do
    alias_method :old_method_missing, :method_missing if method_defined?(:method_missing)
    define_method(:method_missing) { |*| }
  end

  Resource.class_eval do
    alias_method :old_method_missing, :method_missing if method_defined?(:method_missing)
    define_method(:method_missing) { |*| }
  end

  DependencyCollector.class_eval do
    alias_method :old_parse_symbol_spec, :parse_symbol_spec if method_defined?(:parse_symbol_spec)
    define_method(:parse_symbol_spec) { |*| }
  end

  if defined?(DependencyCollector::Compat)
    DependencyCollector::Compat.class_eval do
      alias_method :old_parse_string_spec, :parse_string_spec if method_defined?(:parse_string_spec)
      define_method(:parse_string_spec) { |*| }
    end
  end

  yield
ensure
  BottleSpecification.class_eval do
    if method_defined?(:old_method_missing)
      alias_method :method_missing, :old_method_missing
      undef :old_method_missing
    end
  end

  Module.class_eval do
    if method_defined?(:old_method_missing)
      alias_method :method_missing, :old_method_missing
      undef :old_method_missing
    end
  end

  Resource.class_eval do
    if method_defined?(:old_method_missing)
      alias_method :method_missing, :old_method_missing
      undef :old_method_missing
    end
  end

  DependencyCollector.class_eval do
    if method_defined?(:old_parse_symbol_spec)
      alias_method :parse_symbol_spec, :old_parse_symbol_spec
      undef :old_parse_symbol_spec
    end
  end

  if defined?(DependencyCollector::Compat)
    DependencyCollector::Compat.class_eval do
      if method_defined?(:old_parse_string_spec)
        alias_method :parse_string_spec, :old_parse_string_spec
        undef :old_parse_string_spec
      end
    end
  end
end