[MacPorts] #55546: Install dependencies without asking

[MacPorts]

#55546: Install dependencies without asking
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  Reporter:  Polyergic    |      Owner:
      Type:  enhancement  |     Status:  reopened
  Priority:  Normal       |  Milestone:
 Component:  base         |    Version:  2.4.2
Resolution:               |   Keywords:
      Port:               |
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Comment (by Polyergic):

 @ryandesign, I can't learn ''all'' about interactive mode from
 https://trac.macports.org/wiki/SummerOfCode2014_interactive; in
 particular, it doesn't say
 1. Which interactive prompts may be triggered by `install` (or any other
 command)
 2. Which answers `-N` provides for each interactive prompt

 How do you disable interactive mode in macports.conf?  I don't see
 anything relevant in https://guide.macports.org/chunked/internals
 .configuration-files.html#internals.configuration-files.macports-conf

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Ticket URL: <https://trac.macports.org/ticket/55546#comment:12>
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