Nesting Commands

[Harsh Kumar]

Hi

I wanted to know whether it is possible to nest commands in groovy.

Something like

parentcommand command1 arg1 command2 arg2

What i want is that after entering arg1 if i press tab then i should see command1 and 2 again as suboptions.

Any idea?

[Julien Viet]

you cannot do that. only a first sub command is possible (parentcommans command1 arg1)

what is your use case ?

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[Harsh Kumar]

Hi,

My use case is as follows

Consider the following hierarchy

Bird

->Speed

->Height

Deer

->Speed

so in the CLI say crash%

e.g.

crash% [Press tab]

bird deer

crash% bird [Press tab]
speed (mandatory) height (default 40)
crash% bird speed 30 height 40

Output->Bird is flying at a speed of 30m/s at a height of 40m

Can you make any sense of it? Any help would be appreciated

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Sincerely

Harsh Kumar

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[Julien Viet]

what does not make sense is to provide (mandatory) and (default 40) in the completion because the suggested value will be selected when there is only one choice.

the concept of several level of nesting can be emulated using arguments instead of functions, I come up with this solution:

http://try.crashub.org/gists/5452136

give a try and let me know what you think of it

[Harsh Kumar]

Hi,

This looks promising. But is there a way I can have multiple attributes displayed on pressing tab. Basically a usage or -h option by default, I am extending the existing example here only.


Bird
->Speed
->Height [40]
->Distance

crash% bird [Press tab]
speed height[40] distance

crash% bird speed 30 [Press Tab]
height[40] distance

crash% bird speed 30
crash% bird speed 30 d[Press Tab] -> should expand it to %bird distance OR
crash% bird speed 30 h[Press Tab] -> should expand it to %bird height
crash% bird speed 30 distance 40 [Press Enter]

Output->Bird is flying at a default speed of 30m/s at a default height of 40m and has travelled 40 meters


I really appreciate your proactive help on the usage of crash. Thanks a million

[Julien Viet]

there are two issues that prevent that :

1/ when there is a single completion then this completion is often selected by the client so having the completion "speed height[40] distance" will complete directly the command line and not propose a guess so if you do:

% bird [Press tab]

and the command returns "speed height[40] distance"

then the shell will react as:

% bird speed height[40] distance

2/ spaces will be escaped with \ because it is considered as a single value, so it would be "speed\ height[40]\ distance"

[Harsh Kumar]

Thanks a lot Julien. I think I can work with whatever your have suggested. Thanks a million.