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bug#21104: 25.0.50; relative paths are added to load-path without -nsl (

From: Anders Lindgren
Subject: bug#21104: 25.0.50; relative paths are added to load-path without -nsl (bug#21104)
Date: Tue, 8 Dec 2015 21:03:01 +0100


On Tue, Dec 8, 2015 at 8:21 PM, Glenn Morris <address@hidden> wrote:
I think you've jumped outside the scope of this report.
I would suggest just going with the simple solution, absent evidence of
some other problem.

I have attached a simple solution that solves this specific problem. I'll push it if it looks like an OK solution for you.

> Also, I haven't investigated the cases where there is nothing between path
> separators, as in "foo::bar" (or when the string starts or ends with a
> separator). Today, it looks like it returns either `("foo" "." "bar)' or
> `("foo" nil "bar")' -- although I haven't verified this. A better solution
> would be to simply return `("foo" "bar")' -- path separators without
> anything in between are often simply a user mistake, we don't want to
> pollute system variables like `load-path' because of them.

The feature is intentional, see 17e0445be4a.

I won't claim it's perfect, but IIRC I did test such things at the time.

Apparently, there is more to the code than I initially understood. I agree with you, I no longer think we should change anything here on the short term.

However, I think it behaves strange:

For example (on a Linux machine):
    env EMACSPATH=::/home::/bar:: emacs -q --batch --eval '(print exec-path)'
   ("/usr/lib/lightdm/lightdm" "/usr/local/sbin" "/usr/local/bin" "/use/sbin" "/usr/bin" "/sbin" "/bin" "/usr/games" "." "." "/home" "." "." "/bar" "." ".")

Here, I don't think the ".":s should be included.

Another example (again on Linux):
    env EMACSLOADPATH=::/home::/bar:: emacs -q --batch --eval '(print load-path)'
    The result is too long to print, as it duplicates the standard load path five times.

Here, wouldn't it suffice to add the default load path once?

    -- Anders

Attachment: path.diff
Description: Text document

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