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bug#44631: 28.0.50; Byte compilation fails if destination file is a moun
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From: |
Lars Ingebrigtsen |
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Subject: |
bug#44631: 28.0.50; Byte compilation fails if destination file is a mount point |
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Date: |
Sun, 13 Dec 2020 13:32:37 +0100 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
Philipp Stephani <p.stephani2@gmail.com> writes:
> I guess it also depends on what the semantics are that
> byte-compile-file guarantees. If it attempts to guarantee atomicity,
> then only a intra-filesystem rename (or similar alternatives such as
> O_TMPFILE + linkat) are acceptable, and technically, not even the
> current fallback on EXDEV (which makes rename-file nonatomic) is OK.
> If atomic writes are best-effort, then we could always fall back to
> copy-file + delete-file on any file-error.
It's definitely best-effort, so altering byte-compile-file to try
copy-file + delete-file sounds like the best solution to me.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no