Re: How to debug a vim plugin?

Peng Yu wrote:

> I am wondering how to debug a vim plugin (for example, the following
> one) in an efficient way.
>
> https://github.com/Clavelito/indent-sh.vim/blob/master/indent/sh.vim
>
> The main difficulty that I see is that a vim plugin is different from
> a typical program is that in a typical programming language one can
> easily isolate a piece of code and insert print statements. But in a
> vim plugin, since it causes some effects in the code shown in vim, I
> am not sure how a print statement can help much.
>
> Also, in a regular programming language, one can run a function with
> different parameters, then check its behavior. But a vim plugin is
> just a whole piece of code, it is not clear how to run a piece of code
> in an isolated environment to inspect its behavior.
>
> Does anybody have any tips on how to debugging vim plugins? Thanks.

Besides what's already said, if you just want a simple way to log some
text, you can use the mechanism for channels:

ch_logfile('SomeFileName', 'w')
ch_log('This happened')

Messages are written to a log, thus this also works for things like
autocomplete. It will include time stamps, which are often useful.

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