NAME

       Net::CLI::Interact::Role::Prompt - Command-line prompt management

VERSION

       version 2.143070

DESCRIPTION

       This is another core component of Net::CLI::Interact, and its role is to keep track of the
       current prompt on the connected command line interface. The idea is that most CLI have a
       prompt where you issue commands, and are returned some output which this module gathers.
       The prompt is a demarcation between each command and its response data.

       Note that although we "keep track" of the prompt, Net::CLI::Interact is not a state
       machine, and the choice of command issued to the connected device bears no relation to the
       current (or last matched) prompt.

INTERFACE

   set_prompt( $prompt_name )
       This method will be used most commonly by applications to select and set a prompt from the
       Phrasebook which matches the current context of the connected CLI session. This allows a
       sequence of commands to be sent which share the same Prompt.

       The name you pass in is looked up in the loaded Phrasebook and the entry's regular
       expression stored internally. An exception is thrown if the named Prompt is not known.

       Typically you would either refer to a Prompt in a Macro, or set the prompt you are
       expecting once for a sequence of commands in a particular CLI context.

       When a Macro completes and it has been defined in the Phrasebook with an explicit named
       Prompt at the end, we can assume the user is indicating some change of context. Therefore
       the "prompt" is automatically updated on such occasions to have the regular expression
       from that named Prompt.

   prompt_re
       Returns the current Prompt in the form of a regular expression reference. The Prompt is
       used as a default to catch the end of command response output, when a Macro has not been
       set up with explicit Prompt matching.

       Typically you would either refer to a Prompt in a Macro, or set the prompt you are
       expecting once for a sequence of commands in a particular CLI context.

   unset_prompt
       Use this method to empty the current "prompt" setting (see above). The effect is that the
       module will automatically set the Prompt for itself based on the last line of output
       received from the connected CLI. Do not use this option unless you know what you are
       doing.

   has_set_prompt
       Returns True if there is currently a Prompt set, otherwise returns False.

   prompt_looks_like( $name )
       Returns True if the current prompt matches the given named prompt. This is useful when you
       wish to make a more specific check on the current prompt.

   find_prompt( $wake_up? )
       A helper method that consumes output from the connected CLI session until a line matches
       any one of the named Prompts in the loaded Phrasebook, at which point no more output is
       consumed. As a consequence the "prompt" will be set (see above).

       This might be used when you're connecting to a device which maintains CLI state between
       session disconnects (for example a serial console), and you need to discover the current
       state. However, "find_prompt" is executed automatically for you if you call a "cmd" or
       "macro" before any interaction with the CLI.

       The current device output will be scanned against all known named Prompts. If nothing is
       found, the default behaviour is to die. Passing a positive number to the method (as
       $wake_up) will instead send the content of our "wake_up_msg" slot (see below), typically a
       carriage return, and try to match again. The idea is that by sending one carriage return,
       the connected device will print its CLI prompt. This "send and try to match" process will
       be repeated up to "$wake_up" times.

   wake_up_msg
       Text sent to a device within the "find_prompt" method if no output has so far matched any
       known named Prompt. Default is the value of the output record separator from the Transport
       (one newline).

   last_prompt
       Returns the Prompt which most recently was matched and terminated gathering of output from
       the connected CLI. This is a simple text string.

   last_prompt_re
       Returns the text which was most recently matched and terminated gathering of output from
       the connected CLI, as a quote-escaped regular expression with line start and end anchors.

AUTHOR

       Oliver Gorwits <oliver@cpan.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2014 by Oliver Gorwits.

       This is free software; you can redistribute it and/or modify it under the same terms as
       the Perl 5 programming language system itself.