From: Eric Abrahamsen <eric@ericabrahamsen.net>
To: Marcin Borkowski <mbork@mbork.pl>
Cc: Help Gnu Emacs mailing list <help-gnu-emacs@gnu.org>
Subject: Re: How to get the directory of a package?
Date: Tue, 02 Feb 2021 21:14:22 -0800 [thread overview]
Message-ID: <87mtwlzqa9.fsf@ericabrahamsen.net> (raw)
In-Reply-To: <87r1lx7nti.fsf@mbork.pl> (Marcin Borkowski's message of "Wed, 03 Feb 2021 05:55:05 +0100")
Marcin Borkowski <mbork@mbork.pl> writes:
> OK,
>
>> assume that I'm writing a package which wants to use a file from the
>> same directory the .el (or .elc) file of the package is located in. How
>> can the package know where in the filesystem it is located?
>>
>> Bonus points for a method which works not only with `require', but also
>> with `load-file' and `eval-buffer' (in the last case,
>> `default-directory' will probably work, but I skimmed through all
>> variables and functions matching `directory$' and nothing seemed to be
>> what I'm looking for).
>
> so I think I've found the answer. Is this correct? Are there possibly
> some edge cases I didn't think about?
>
> (if load-file-name
> (file-name-directory load-file-name)
> default-directory)
I stole the following bit of code to find "this file" from 'ert-x, it
was a bit of cargo-culting as I'm not entirely sure when/how the various
conditions would be true:
(or (bound-and-true-p byte-compile-current-file)
(and load-in-progress load-file-name)
buffer-file-name)
Might be helpful?
prev parent reply other threads:[~2021-02-03 5:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-03 4:50 How to get the directory of a package? Marcin Borkowski
2021-02-03 4:55 ` Marcin Borkowski
2021-02-03 5:02 ` Stefan Monnier
2021-02-03 5:14 ` Eric Abrahamsen [this message]
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