Module: SSHKit::Runner::Parallel::CompleteAll

Included in:
SSHKit::Runner::Parallel
Defined in:
lib/kamal/sshkit_with_ext.rb

Overview

SSHKit joins the threads in sequence and fails on the first error it encounters, which means that we wait threads before the first failure to complete but not for ones after.

We’ll patch it to wait for them all to complete, and to record all the threads that errored so we can see when a problem occurs on multiple hosts.

Instance Method Summary collapse

Instance Method Details

#execute ⇒ Object 



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# File 'lib/kamal/sshkit_with_ext.rb', line 177

def execute
  threads = hosts.map do |host|
    Thread.new(host) do |h|
      backend(h, &block).run
    rescue ::StandardError => e
      e2 = SSHKit::Runner::ExecuteError.new e
      raise e2, "Exception while executing #{host.user ? "as #{host.user}@" : "on host "}#{host}: #{e.message}"
    end
  end

  exceptions = []
  threads.each do |t|
    begin
      t.join
    rescue SSHKit::Runner::ExecuteError => e
      exceptions << e
    end
  end
  if exceptions.one?
    raise exceptions.first
  elsif exceptions.many?
    raise exceptions.first, [ "Exceptions on #{exceptions.count} hosts:", exceptions.map(&:message) ].join("\n")
  end
end