[Capistrano] Re: How would I use cap2 to manage system updates?

[Jamis Buck]

A naive expect-like routine can be written for cap using the callback that run expects to check for the output and respond with what you want to say. Note that the block is run once for _each server_, so if you put an interactive prompt in there, you'll want to make sure that you cache the response and reuse it for similar prompts. Here's a naive example (which does not account for multiple servers):

  # channel: the SSH channel object used for this response
  # stream: either :err or :out, for stderr or stdout responses
  # output: the text that the server is sending, might be in chunks
  run "apt-get update" do |channel, stream, output|
    if output =~ /Are you sure?/
      answer = Capistrano::CLI.ui.ask("Are you sure: ")
      channel.send_data(answer + "\n")
    else
      # allow the default callback to be processed

    end
  end

Hopefully that gives you some other ideas, too.

- Jamis

On Dec 13, 2007, at 11:51 PM, Scott wrote:

Capistrano::Configuration.default_io_proc.call[channel, stream, output]

Without going into the wisdom of doing this (or actually in fact
answering your question), you can add -y to the apt-get command, which
will answer yes for you without the prompt.

On Dec 13, 3:26 pm, samg <[EMAIL PROTECTED]> wrote:

I wrote a task that runs apt-get update, but when it asks whether I
want to proceed and presents me with a yes or no answer, i dont know
how to proceed. I'm looking at Capistrano.ui.ask, which points to the
highline library. Has anyone figured out how to have a cap script
present you with a prompt when the shell asks you a question?

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