Re: master 9904376c797: Support calling 'project-current' with custom prompt

[Eshel Yaron]

Dmitry Gutov <dmitry@gutov.dev> writes:

>> JFYI, I'm using a custom project-prompter, which was not prepared to
>> be
>> called with an argument, so I got some unexpected errors until I
>> realized what changed.  A quick lookup online shows that although this
>> option is quite new, a few others already set it to a custom function,
>> so it might be worth catching the "Wrong number of arguments" error.
>
> It's good of you to bring this up, but under what conditions do you
> encounter the breakage? Are there 3rd-party callers of
> 'project-current' already as well, that pass a string as MAYBE-PROMPT?
> If so, that's a little quicker than I expected. :)

Ah, no, you're right, I got the error through custom code of mine.
I adapted some code to call project-current with a string, without
adapting my project-prompter function accordingly.

> Catching an error might be a fine approach, but then a lot of people
> would miss out on the reason why the provided prompt is not used.

Yeah, that's a reasonable consideration too.

>> Also, I'd like to update the docstring of project-prompter along the
>> following lines, if it looks right to you:
>> diff --git a/lisp/progmodes/project.el b/lisp/progmodes/project.el
>> index 3cdaa7c2a76..6383bdc95d2 100644
>> --- a/lisp/progmodes/project.el
>> +++ b/lisp/progmodes/project.el
>> @@ -199,7 +199,9 @@ project-current-directory-override
>>     (defcustom project-prompter #'project-prompt-project-dir
>>     "Function to call to prompt for a project.
>> -Called with no arguments and should return a project root dir."
>> +The function is either called with no arguments or with one argument,
>> +which is the prompt string to use when prompting.  It should return a
>> +project root directory."
>>     :type '(choice (const :tag "Prompt for a project directory"
>>                           project-prompt-project-dir)
>>                    (const :tag "Prompt for a project name"
>
> Thanks, I've pushed a slight edit of that (sorry it went out without
> attribution). Also updated the corresponding NEWS entry.

Great, thank you.


Eshel