Re: How to debug a vim plugin?

Tony Mechelynck wrote:
> On Mon, Dec 10, 2018 at 3:55 PM Peng Yu <pengyu.ut@gmail.com> wrote:
>> Hi,
>>
>> 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.
>>
>> --
>> Regards,
>> Peng
> Debugging Vim-script language is Dr. Chip's province; he even wrote a
> script to help debug other scripts. You may already check if
> http://www.drchip.org/astronaut/vim/#DECHO helps you, otherwise I'm
> adding Dr. Chip as Cc in case he might have other helpful information
> for you.
>
> Best regards,
> Tony.
>
Hello:

Decho.vim would be my suggestion, too.  Decho provides several ways to
help you get your debugging information out; a separate window on the
current tab, a separate tab, via vim's messages facility, and to a
remote vim.  The latter provides the most isolation of debugging output
capture from effects on the script's display.

Regards,
Chip Campbell

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