Net::CLI::Interact::Role::Prompt(3pm)

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NAME

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

9       This is another core component of Net::CLI::Interact, and its role is
10       to keep track of the current prompt on the connected command line
11       interface. The idea is that most CLI have a prompt where you issue
12       commands, and are returned some output which this module gathers. The
13       prompt is a demarcation between each command and its response data.
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15       Note that although we "keep track" of the prompt, Net::CLI::Interact is
16       not a state machine, and the choice of command issued to the connected
17       device bears no relation to the current (or last matched) prompt.
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INTERFACE

20   set_prompt( $prompt_name )
21       This method will be used most commonly by applications to select and
22       set a prompt from the Phrasebook which matches the current context of
23       the connected CLI session. This allows a sequence of commands to be
24       sent which share the same Prompt.
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26       The name you pass in is looked up in the loaded Phrasebook and the
27       entry's regular expression stored internally. An exception is thrown if
28       the named Prompt is not known.
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30       Typically you would either refer to a Prompt in a Macro, or set the
31       prompt you are expecting once for a sequence of commands in a
32       particular CLI context.
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34       When a Macro completes and it has been defined in the Phrasebook with
35       an explicit named Prompt at the end, we can assume the user is
36       indicating some change of context. Therefore the "prompt" is
37       automatically updated on such occasions to have the regular expression
38       from that named Prompt.
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40   prompt_re
41       Returns the current Prompt in the form of a regular expression
42       reference. The Prompt is used as a default to catch the end of command
43       response output, when a Macro has not been set up with explicit Prompt
44       matching.
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46       Typically you would either refer to a Prompt in a Macro, or set the
47       prompt you are expecting once for a sequence of commands in a
48       particular CLI context.
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50   unset_prompt
51       Use this method to empty the current "prompt" setting (see above). The
52       effect is that the module will automatically set the Prompt for itself
53       based on the last line of output received from the connected CLI. Do
54       not use this option unless you know what you are doing.
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56   has_set_prompt
57       Returns True if there is currently a Prompt set, otherwise returns
58       False.
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60   prompt_looks_like( $name )
61       Returns True if the current prompt matches the given named prompt. This
62       is useful when you wish to make a more specific check on the current
63       prompt.
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65   find_prompt( $wake_up? )
66       A helper method that consumes output from the connected CLI session
67       until a line matches any one of the named Prompts in the loaded
68       Phrasebook, at which point no more output is consumed. As a consequence
69       the "prompt" will be set (see above).
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71       This might be used when you're connecting to a device which maintains
72       CLI state between session disconnects (for example a serial console),
73       and you need to discover the current state. However, "find_prompt" is
74       executed automatically for you if you call a "cmd" or "macro" before
75       any interaction with the CLI.
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77       The current device output will be scanned against all known named
78       Prompts. If nothing is found, the default behaviour is to die. Passing
79       a positive number to the method (as $wake_up) will instead send the
80       content of our "wake_up_msg" slot (see below), typically a carriage
81       return, and try to match again. The idea is that by sending one
82       carriage return, the connected device will print its CLI prompt. This
83       "send and try to match" process will be repeated up to "$wake_up"
84       times.
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86   wake_up_msg
87       Text sent to a device within the "find_prompt" method if no output has
88       so far matched any known named Prompt. Default is the value of the
89       output record separator from the Transport (one newline).
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91   last_prompt
92       Returns the Prompt which most recently was matched and terminated
93       gathering of output from the connected CLI. This is a simple text
94       string.
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96   last_prompt_re
97       Returns the text which was most recently matched and terminated
98       gathering of output from the connected CLI, as a quote-escaped regular
99       expression with line start and end anchors.
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103perl v5.28.1                      2019-02-02Net::CLI::Interact::Role::Prompt(3)