Module: Utils

Extended by:
T::Sig
Defined in:
extend/os/mac/utils/bottles.rb,
extend/os/mac/utils/analytics.rb,
extend/os/linux/utils/analytics.rb,
utils/ast.rb,
utils/git.rb,
utils/svn.rb,
utils/tar.rb,
utils/curl.rb,
utils/fork.rb,
utils/link.rb,
utils/popen.rb,
utils/shell.rb,
utils/bottles.rb,
utils/shebang.rb,
utils/analytics.rb,
utils/inreplace.rb,
utils/git_repository.rb

Defined Under Namespace

Modules: AST, Analytics, Bottles, Curl, Git, Inreplace, Link, Shebang, Shell, Svn, Tar

Class Method Summary collapse

Class Method Details

.git_branch(repo = Pathname.pwd, safe: true) ⇒ String?

Gets the name of the currently checked-out branch, or HEAD if the repository is in a detached HEAD state.

Parameters:

  • repo (String, Pathname) (defaults to: Pathname.pwd)
  • safe (Boolean) (defaults to: true)

Returns:



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# File 'utils/git_repository.rb', line 42

def self.git_branch(repo = Pathname.pwd, safe: true)
  repo = Pathname(repo).extend(GitRepositoryExtension)
  repo.git_branch(safe: safe)
end

.git_commit_message(repo = Pathname.pwd, commit: "HEAD", safe: true) ⇒ String?

Gets the full commit message of the specified commit, or of the HEAD commit if unspecified.

Parameters:

  • repo (String, Pathname) (defaults to: Pathname.pwd)
  • commit (String) (defaults to: "HEAD")
  • safe (Boolean) (defaults to: true)

Returns:



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# File 'utils/git_repository.rb', line 55

def self.git_commit_message(repo = Pathname.pwd, commit: "HEAD", safe: true)
  repo = Pathname(repo).extend(GitRepositoryExtension)
  repo.git_commit_message(commit, safe: safe)
end

.git_head(repo = Pathname.pwd, length: nil, safe: true) ⇒ String?

Gets the full commit hash of the HEAD commit.

Parameters:

  • repo (String, Pathname) (defaults to: Pathname.pwd)
  • length (Integer, nil) (defaults to: nil)
  • safe (Boolean) (defaults to: true)

Returns:



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# File 'utils/git_repository.rb', line 15

def self.git_head(repo = Pathname.pwd, length: nil, safe: true)
  return git_short_head(repo, length: length) if length.present?

  repo = Pathname(repo).extend(GitRepositoryExtension)
  repo.git_head(safe: safe)
end

.git_short_head(repo = Pathname.pwd, length: nil, safe: true) ⇒ String?

Gets a short commit hash of the HEAD commit.

Parameters:

  • repo (String, Pathname) (defaults to: Pathname.pwd)
  • length (Integer, nil) (defaults to: nil)
  • safe (Boolean) (defaults to: true)

Returns:



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# File 'utils/git_repository.rb', line 30

def self.git_short_head(repo = Pathname.pwd, length: nil, safe: true)
  repo = Pathname(repo).extend(GitRepositoryExtension)
  repo.git_short_head(length: length, safe: safe)
end

.popen(args, mode, options = {}) ⇒ Object



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# File 'utils/popen.rb', line 46

def self.popen(args, mode, options = {})
  IO.popen("-", mode) do |pipe|
    if pipe
      return pipe.read unless block_given?

      yield pipe
    else
      options[:err] ||= "/dev/null" unless ENV["HOMEBREW_STDERR"]
      begin
        exec(*args, options)
      rescue Errno::ENOENT
        $stderr.puts "brew: command not found: #{args[0]}" unless options[:err] == :close
        exit! 127
      rescue SystemCallError
        $stderr.puts "brew: exec failed: #{args[0]}" unless options[:err] == :close
        exit! 1
      end
    end
  end
end

.popen_read(*args, safe: false, **options, &block) ⇒ Object



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# File 'utils/popen.rb', line 8

def self.popen_read(*args, safe: false, **options, &block)
  output = popen(args, "rb", options, &block)
  return output if !safe || $CHILD_STATUS.success?

  raise ErrorDuringExecution.new(args, status: $CHILD_STATUS, output: [[:stdout, output]])
end

.popen_write(*args, safe: false, **options) ⇒ Object



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# File 'utils/popen.rb', line 19

def self.popen_write(*args, safe: false, **options)
  output = ""
  popen(args, "w+b", options) do |pipe|
    # Before we yield to the block, capture as much output as we can
    loop do
      output += pipe.read_nonblock(IO_DEFAULT_BUFFER_SIZE)
    rescue IO::WaitReadable, EOFError
      break
    end

    yield pipe
    pipe.close_write
    IO.select([pipe])

    # Capture the rest of the output
    output += pipe.read
    output.freeze
  end
  return output if !safe || $CHILD_STATUS.success?

  raise ErrorDuringExecution.new(args, status: $CHILD_STATUS, output: [[:stdout, output]])
end

.rewrite_child_error(child_error) ⇒ Object



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# File 'utils/fork.rb', line 8

def self.rewrite_child_error(child_error)
  error = if child_error.inner["cmd"] &&
             child_error.inner_class == ErrorDuringExecution
    ErrorDuringExecution.new(child_error.inner["cmd"],
                             status: child_error.inner["status"],
                             output: child_error.inner["output"])
  elsif child_error.inner["cmd"] &&
        child_error.inner_class == BuildError
    # We fill `BuildError#formula` and `BuildError#options` in later,
    # when we rescue this in `FormulaInstaller#build`.
    BuildError.new(nil, child_error.inner["cmd"],
                   child_error.inner["args"], child_error.inner["env"])
  elsif child_error.inner_class == Interrupt
    Interrupt.new
  else
    # Everything other error in the child just becomes a RuntimeError.
    RuntimeError.new(child_error.message)
  end

  error.set_backtrace child_error.backtrace

  error
end

.safe_forkObject



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# File 'utils/fork.rb', line 32

def self.safe_fork
  Dir.mktmpdir("homebrew", HOMEBREW_TEMP) do |tmpdir|
    UNIXServer.open("#{tmpdir}/socket") do |server|
      read, write = IO.pipe

      pid = fork do
        # bootsnap doesn't like these forked processes
        ENV["HOMEBREW_NO_BOOTSNAP"] = "1"

        ENV["HOMEBREW_ERROR_PIPE"] = server.path
        server.close
        read.close
        write.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC)
        yield
      rescue Exception => e # rubocop:disable Lint/RescueException
        error_hash = JSON.parse e.to_json

        # Special case: We need to recreate ErrorDuringExecutions
        # for proper error messages and because other code expects
        # to rescue them further down.
        if e.is_a?(ErrorDuringExecution)
          error_hash["cmd"] = e.cmd
          error_hash["status"] = if e.status.is_a?(Process::Status)
            {
              exitstatus: e.status.exitstatus,
              termsig:    e.status.termsig,
            }
          else
            e.status
          end
          error_hash["output"] = e.output
        end

        write.puts error_hash.to_json
        write.close

        exit!
      else
        exit!(true)
      end

      ignore_interrupts(:quietly) do # the child will receive the interrupt and marshal it back
        begin
          socket = server.accept_nonblock
        rescue Errno::EAGAIN, Errno::EWOULDBLOCK, Errno::ECONNABORTED, Errno::EPROTO, Errno::EINTR
          retry unless Process.waitpid(T.must(pid), Process::WNOHANG)
        else
          socket.send_io(write)
          socket.close
        end
        write.close
        data = read.read
        read.close
        Process.wait(T.must(pid)) unless socket.nil?

        # 130 is the exit status for a process interrupted via Ctrl-C.
        # We handle it here because of the possibility of an interrupted process terminating
        # without writing its Interrupt exception to the error pipe.
        raise Interrupt if $CHILD_STATUS.exitstatus == 130

        if data.present?
          error_hash = JSON.parse(T.must(data.lines.first))

          e = ChildProcessError.new(error_hash)

          raise rewrite_child_error(e)
        end

        raise "Forked child process failed: #{$CHILD_STATUS}" unless $CHILD_STATUS.success?
      end
    end
  end
end

.safe_popen_read(*args, **options, &block) ⇒ Object



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# File 'utils/popen.rb', line 15

def self.safe_popen_read(*args, **options, &block)
  popen_read(*args, safe: true, **options, &block)
end

.safe_popen_write(*args, **options, &block) ⇒ Object



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# File 'utils/popen.rb', line 42

def self.safe_popen_write(*args, **options, &block)
  popen_write(*args, safe: true, **options, &block)
end