Module: GitHub::API Private

Extended by:
T::Sig
Defined in:
utils/github/api.rb

Overview

This module is part of a private API. This module may only be used in the Homebrew/brew repository. Third parties should avoid using this module if possible, as it may be removed or changed without warning.

Helper functions to access the GitHub API.

Defined Under Namespace

Classes: AuthenticationFailedError, Error, HTTPNotFoundError, MissingAuthenticationError, RateLimitExceededError, ValidationFailedError

Constant Summary collapse

ERRORS =

This constant is part of a private API. This constant may only be used in the Homebrew/brew repository. Third parties should avoid using this constant if possible, as it may be removed or changed without warning. 

[
  AuthenticationFailedError,
  HTTPNotFoundError,
  RateLimitExceededError,
  Error,
  JSON::ParserError,
].freeze

Class Method Summary collapse

Class Method Details

.credentials ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'utils/github/api.rb', line 140

def credentials
  @credentials ||= Homebrew::EnvConfig.github_api_token || keychain_username_password
end

.credentials_error_message(response_headers, needed_scopes) ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Given an API response from GitHub, warn the user if their credentials have insufficient permissions.



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# File 'utils/github/api.rb', line 157

def credentials_error_message(response_headers, needed_scopes)
  return if response_headers.empty?

  scopes = response_headers["x-accepted-oauth-scopes"].to_s.split(", ")
  needed_scopes = Set.new(scopes || needed_scopes)
  credentials_scopes = response_headers["x-oauth-scopes"]
  return if needed_scopes.subset?(Set.new(credentials_scopes.to_s.split(", ")))

  needed_scopes = needed_scopes.to_a.join(", ").presence || "none"
  credentials_scopes = "none" if credentials_scopes.blank?

  what = case credentials_type
  when :keychain_username_password
    "macOS keychain GitHub"
  when :env_token
    "HOMEBREW_GITHUB_API_TOKEN"
  end

  @credentials_error_message ||= onoe <<~EOS
    Your #{what} credentials do not have sufficient scope!
    Scopes required: #{needed_scopes}
    Scopes present:  #{credentials_scopes}
    #{CREATE_GITHUB_PAT_MESSAGE}
  EOS
end

.credentials_type ⇒ Symbol

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Returns:



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# File 'utils/github/api.rb', line 145

def credentials_type
  if Homebrew::EnvConfig.github_api_token
    :env_token
  elsif keychain_username_password
    :keychain_username_password
  else
    :none
  end
end

.keychain_username_password ⇒ String?

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Gets the password field from git-credential-osxkeychain for github.com, but only if that password looks like a GitHub Personal Access Token.

Returns:



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# File 'utils/github/api.rb', line 118

def keychain_username_password
  github_credentials = Utils.popen_write("git", "credential-osxkeychain", "get") do |pipe|
    pipe.write "protocol=https\nhost=github.com\n"
  end
  github_username = github_credentials[/username=(.+)/, 1]
  github_password = github_credentials[/password=(.+)/, 1]
  return unless github_username

  # Don't use passwords from the keychain unless they look like
  # GitHub Personal Access Tokens:
  #   https://github.com/Homebrew/brew/issues/6862#issuecomment-572610344
  return unless GITHUB_PERSONAL_ACCESS_TOKEN_REGEX.match?(github_password)

  github_password
rescue Errno::EPIPE
  # The above invocation via `Utils.popen` can fail, causing the pipe to be
  # prematurely closed (before we can write to it) and thus resulting in a
  # broken pipe error. The root cause is usually a missing or malfunctioning
  # `git-credential-osxkeychain` helper.
  nil
end

.open_graphql(query, scopes: [].freeze) ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'utils/github/api.rb', line 256

def open_graphql(query, scopes: [].freeze)
  data = { query: query }
  result = open_rest("https://api.github.com/graphql", scopes: scopes, data: data, request_method: "POST")

  if result["errors"].present?
    raise Error, result["errors"].map { |e|
                   "#{e["type"]}: #{e["message"]}"
                 }.join("\n")
  end

  result["data"]
end

.open_rest(url, data: nil, data_binary_path: nil, request_method: nil, scopes: [].freeze, parse_json: true) ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'utils/github/api.rb', line 183

def open_rest(url, data: nil, data_binary_path: nil, request_method: nil, scopes: [].freeze, parse_json: true)
  # This is a no-op if the user is opting out of using the GitHub API.
  return block_given? ? yield({}) : {} if Homebrew::EnvConfig.no_github_api?

  args = ["--header", "Accept: application/vnd.github.v3+json", "--write-out", "\n%\{http_code}"]
  args += ["--header", "Accept: application/vnd.github.antiope-preview+json"]

  token = credentials
  args += ["--header", "Authorization: token #{token}"] unless credentials_type == :none

  data_tmpfile = nil
  if data
    begin
      data = JSON.pretty_generate data
      data_tmpfile = Tempfile.new("github_api_post", HOMEBREW_TEMP)
    rescue JSON::ParserError => e
      raise Error, "Failed to parse JSON request:\n#{e.message}\n#{data}", e.backtrace
    end
  end

  if data_binary_path.present?
    args += ["--data-binary", "@#{data_binary_path}"]
    args += ["--header", "Content-Type: application/gzip"]
  end

  headers_tmpfile = Tempfile.new("github_api_headers", HOMEBREW_TEMP)
  begin
    if data
      data_tmpfile.write data
      data_tmpfile.close
      args += ["--data", "@#{data_tmpfile.path}"]

      args += ["--request", request_method.to_s] if request_method
    end

    args += ["--dump-header", headers_tmpfile.path]

    output, errors, status = curl_output("--location", url.to_s, *args, secrets: [token])
    output, _, http_code = output.rpartition("\n")
    output, _, http_code = output.rpartition("\n") if http_code == "000"
    headers = headers_tmpfile.read
  ensure
    if data_tmpfile
      data_tmpfile.close
      data_tmpfile.unlink
    end
    headers_tmpfile.close
    headers_tmpfile.unlink
  end

  begin
    raise_error(output, errors, http_code, headers, scopes) if !http_code.start_with?("2") || !status.success?

    return if http_code == "204" # No Content

    output = JSON.parse output if parse_json
    if block_given?
      yield output
    else
      output
    end
  rescue JSON::ParserError => e
    raise Error, "Failed to parse JSON response\n#{e.message}", e.backtrace
  end
end

.paginate_rest(url, per_page: 100) ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'utils/github/api.rb', line 249

def paginate_rest(url, per_page: 100)
  (1..API_MAX_PAGES).each do |page|
    result = API.open_rest("#{url}?per_page=#{per_page}&page=#{page}")
    yield(result, page)
  end
end

.raise_error(output, errors, http_code, headers, scopes) ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'utils/github/api.rb', line 269

def raise_error(output, errors, http_code, headers, scopes)
  json = begin
    JSON.parse(output)
  rescue
    nil
  end
  message = json&.[]("message") || "curl failed! #{errors}"

  meta = {}
  headers.lines.each do |l|
    key, _, value = l.delete(":").partition(" ")
    key = key.downcase.strip
    next if key.empty?

    meta[key] = value.strip
  end

  credentials_error_message(meta, scopes)

  case http_code
  when "401"
    raise AuthenticationFailedError, message
  when "403"
    if meta.fetch("x-ratelimit-remaining", 1).to_i <= 0
      reset = meta.fetch("x-ratelimit-reset").to_i
      raise RateLimitExceededError.new(reset, message)
    end

    raise AuthenticationFailedError, message
  when "404"
    raise MissingAuthenticationError if credentials_type == :none && scopes.present?

    raise HTTPNotFoundError, message
  when "422"
    errors = json&.[]("errors") || []
    raise ValidationFailedError.new(message, errors)
  else
    raise Error, message
  end
end