Module: GitHub

Defined in:
brew/Library/Homebrew/dev-cmd/pull.rb,
brew/Library/Homebrew/utils/github.rb

Defined Under Namespace

Classes: AuthenticationFailedError, Error, HTTPNotFoundError, RateLimitExceededError, ValidationFailedError

Constant Summary collapse

API_URL = 
"https://api.github.com"
CREATE_GIST_SCOPES = 
["gist"].freeze
CREATE_ISSUE_FORK_OR_PR_SCOPES = 
["public_repo"].freeze
ALL_SCOPES = 
(CREATE_GIST_SCOPES + CREATE_ISSUE_FORK_OR_PR_SCOPES).freeze
ALL_SCOPES_URL = 
Formatter.url(
  "https://github.com/settings/tokens/new?scopes=#{ALL_SCOPES.join(",")}&description=Homebrew",
).freeze
PR_ENV_KEY = 
"HOMEBREW_NEW_FORMULA_PULL_REQUEST_URL"
PR_ENV = 
ENV[PR_ENV_KEY]

Class Method Summary collapse

Class Method Details

.api_credentials ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 82

def api_credentials
  @api_credentials ||= begin
    if ENV["HOMEBREW_GITHUB_API_TOKEN"]
      ENV["HOMEBREW_GITHUB_API_TOKEN"]
    elsif ENV["HOMEBREW_GITHUB_API_USERNAME"] && ENV["HOMEBREW_GITHUB_API_PASSWORD"]
      [ENV["HOMEBREW_GITHUB_API_PASSWORD"], ENV["HOMEBREW_GITHUB_API_USERNAME"]]
    else
      github_credentials = api_credentials_from_keychain
      github_username = github_credentials[/username=(.+)/, 1]
      github_password = github_credentials[/password=(.+)/, 1]
      if github_username && github_password
        [github_password, github_username]
      else
        []
      end
    end
  end
end

.api_credentials_error_message(response_headers, needed_scopes) ⇒ Object 



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

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

  @api_credentials_error_message ||= begin
    unauthorized = (response_headers["http/1.1"] == "401 Unauthorized")
    scopes = response_headers["x-accepted-oauth-scopes"].to_s.split(", ")
    if unauthorized && scopes.blank?
      needed_human_scopes = needed_scopes.join(", ")
      credentials_scopes = response_headers["x-oauth-scopes"]
      return if needed_human_scopes.blank? && credentials_scopes.blank?

      needed_human_scopes = "none" if needed_human_scopes.blank?
      credentials_scopes = "none" if credentials_scopes.blank?

      case GitHub.api_credentials_type
      when :keychain
        onoe <<~EOS
          Your macOS keychain GitHub credentials do not have sufficient scope!
          Scopes they need: #{needed_human_scopes}
          Scopes they have: #{credentials_scopes}
          Create a personal access token:
            #{ALL_SCOPES_URL}
          #{Utils::Shell.set_variable_in_profile("HOMEBREW_GITHUB_API_TOKEN", "your_token_here")}
        EOS
      when :environment
        onoe <<~EOS
          Your HOMEBREW_GITHUB_API_TOKEN does not have sufficient scope!
          Scopes it needs: #{needed_human_scopes}
            Scopes it has: #{credentials_scopes}
          Create a new personal access token:
            #{ALL_SCOPES_URL}
          #{Utils::Shell.set_variable_in_profile("HOMEBREW_GITHUB_API_TOKEN", "your_token_here")}
        EOS
      end
    end
    true
  end
end

.api_credentials_from_keychain ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 101

def api_credentials_from_keychain
  Utils.popen(["git", "credential-osxkeychain", "get"], "w+") do |pipe|
    pipe.write "protocol=https\nhost=github.com\n"
    pipe.close_write
    pipe.read
  end
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.
  ""
end

.api_credentials_type ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 115

def api_credentials_type
  token, username = api_credentials
  return :none if !token || token.empty?
  return :environment if !username || username.empty?

  :keychain
end

.api_errors ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 391

def api_errors
  [GitHub::AuthenticationFailedError, GitHub::HTTPNotFoundError,
   GitHub::RateLimitExceededError, GitHub::Error, JSON::ParserError].freeze
end

.create_fork(repo) ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 321

def create_fork(repo)
  url = "#{API_URL}/repos/#{repo}/forks"
  data = {}
  scopes = CREATE_ISSUE_FORK_OR_PR_SCOPES
  open_api(url, data: data, scopes: scopes)
end

.create_issue_comment(body) ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 360

def create_issue_comment(body)
  return false unless PR_ENV

  _, user, repo, pr = *PR_ENV.match(HOMEBREW_PULL_OR_COMMIT_URL_REGEX)
  if !user || !repo || !pr
    opoo <<-EOS.undent
      #{PR_ENV_KEY} set but regex matched:
      user: #{user.inspect}, repo: #{repo.inspect}, pr: #{pr.inspect}
    EOS
    return false
  end

  url = "#{API_URL}/repos/#{user}/#{repo}/issues/#{pr}/comments"
  data = { "body" => body }
  if issue_comment_exists?(user, repo, pr, body)
    ohai "Skipping: identical comment exists on #{PR_ENV}"
    return true
  end

  scopes = CREATE_ISSUE_FORK_OR_PR_SCOPES
  open_api(url, data: data, scopes: scopes)
end

.create_pull_request(repo, title, head, base, body) ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 328

def create_pull_request(repo, title, head, base, body)
  url = "#{API_URL}/repos/#{repo}/pulls"
  data = { title: title, head: head, base: base, body: body }
  scopes = CREATE_ISSUE_FORK_OR_PR_SCOPES
  open_api(url, data: data, scopes: scopes)
end

.issue_comment_exists?(user, repo, pr, body) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'brew/Library/Homebrew/utils/github.rb', line 383

def issue_comment_exists?(user, repo, pr, body)
  url = "#{API_URL}/repos/#{user}/#{repo}/issues/#{pr}/comments"
  comments = open_api(url)
  return unless comments

  comments.any? { |comment| comment["body"].eql?(body) }
end

.issues_for_formula(name, options = {}) ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 276

def issues_for_formula(name, options = {})
  tap = options[:tap] || CoreTap.instance
  search_issues(name, state: "open", repo: tap.full_name, in: "title")
end

.merge_pull_request(repo, number:, sha:, merge_method:, commit_message: nil) ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 299

def merge_pull_request(repo, number:, sha:, merge_method:, commit_message: nil)
  url = "#{API_URL}/repos/#{repo}/pulls/#{number}/merge"
  data = { sha: sha, merge_method: merge_method }
  data[:commit_message] = commit_message if commit_message
  open_api(url, data: data, request_method: :PUT, scopes: CREATE_ISSUE_FORK_OR_PR_SCOPES)
end

.open_api(url, data: nil, request_method: nil, scopes: [].freeze) ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 162

def open_api(url, data: nil, request_method: nil, scopes: [].freeze)
  # This is a no-op if the user is opting out of using the GitHub API.
  return block_given? ? yield({}) : {} if ENV["HOMEBREW_NO_GITHUB_API"]

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

  token, username = api_credentials
  case api_credentials_type
  when :keychain
    args += ["--user", "#{username}:#{token}"]
  when :environment
    args += ["--header", "Authorization: token #{token}"]
  end

  data_tmpfile = nil
  if data
    begin
      data = JSON.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

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

    return if http_code == "204" # No Content

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

.permission(repo, user) ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 285

def permission(repo, user)
  open_api("#{API_URL}/repos/#{repo}/collaborators/#{user}/permission")
end

.print_pull_requests_matching(query) ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 306

def print_pull_requests_matching(query)
  open_or_closed_prs = search_issues(query, type: "pr", user: "Homebrew")

  open_prs = open_or_closed_prs.select { |i| i["state"] == "open" }
  prs = if !open_prs.empty?
    puts "Open pull requests:"
    open_prs
  else
    puts "Closed pull requests:" unless open_or_closed_prs.empty?
    open_or_closed_prs.take(20)
  end

  prs.each { |i| puts "#{i["title"]} (#{i["html_url"]})" }
end

.private_repo?(full_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'brew/Library/Homebrew/utils/github.rb', line 335

def private_repo?(full_name)
  uri = url_to "repos", full_name
  open_api(uri) { |json| json["private"] }
end

.pull_requests(repo, **options) ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 294

def pull_requests(repo, **options)
  url = "#{API_URL}/repos/#{repo}/pulls?#{URI.encode_www_form(options)}"
  open_api(url)
end

.query_string(*main_params, **qualifiers) ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 340

def query_string(*main_params, **qualifiers)
  params = main_params

  params += qualifiers.flat_map do |key, value|
    Array(value).map { |v| "#{key}:#{v}" }
  end

  "q=#{URI.encode_www_form_component(params.join(" "))}&per_page=100"
end

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



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# File 'brew/Library/Homebrew/utils/github.rb', line 227

def raise_api_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

  if meta.fetch("x-ratelimit-remaining", 1).to_i <= 0
    reset = meta.fetch("x-ratelimit-reset").to_i
    raise RateLimitExceededError.new(reset, message)
  end

  GitHub.api_credentials_error_message(meta, scopes)

  case http_code
  when "401", "403"
    raise AuthenticationFailedError, message
  when "404"
    raise HTTPNotFoundError, message
  when "422"
    errors = json&.[]("errors") || []
    raise ValidationFailedError.new(message, errors)
  else
    raise Error, message
  end
end

.repository(user, repo) ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 268

def repository(user, repo)
  open_api(url_to("repos", user, repo))
end

.search(entity, *queries, **qualifiers) ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 354

def search(entity, *queries, **qualifiers)
  uri = url_to "search", entity
  uri.query = query_string(*queries, **qualifiers)
  open_api(uri) { |json| json.fetch("items", []) }
end

.search_code(**qualifiers) ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 272

def search_code(**qualifiers)
  search("code", **qualifiers)
end

.search_issues(query, **qualifiers) ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 264

def search_issues(query, **qualifiers)
  search("issues", query, **qualifiers)
end

.test_bot_user(user, test_bot) ⇒ Object

Return the corresponding test-bot user name for the given GitHub organization.



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# File 'brew/Library/Homebrew/dev-cmd/pull.rb', line 16

def test_bot_user(user, test_bot)
  return test_bot if test_bot
  return "BrewTestBot" if user.casecmp("homebrew").zero?

  "#{user.capitalize}TestBot"
end

.url_to(*subroutes) ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 350

def url_to(*subroutes)
  URI.parse([API_URL, *subroutes].join("/"))
end

.user ⇒ Object 



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# File 'brew/Library/Homebrew/utils/github.rb', line 281

def user
  @user ||= open_api("#{API_URL}/user")
end

.write_access?(repo, user = nil) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'brew/Library/Homebrew/utils/github.rb', line 289

def write_access?(repo, user = nil)
  user ||= self.user["login"]
  ["admin", "write"].include?(permission(repo, user)["permission"])
end