bug#66542: Fix: locate-dominating-file predicate should receive dir not file

[dalanicolai]

Tags: patch

Tags: patch

The docstring of 'locate-dominating-file' mentions that its NAME argument
should be a dir, but currently it simply receives the FILE
argument. Therefore, using the function e.g. with the following predicate for NAME

(lambda (dir)
(seq-filter (apply-partially #'string-match-p "paint")
(directory-files
dir)))

to check if a directory contains a file regexp-matching 'paint', throws
an error:

(file-error "Opening directory" "Not a directory" "/home/...")

This patch simply wraps the FILE argument in the (funcall NAME FILE) with
a 'file-name-directory' thereby fixing the function.

The commit log entry could read:
FIX: ensure that locate-dominating-file predicate recives dir


In GNU Emacs 29.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.38,
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Repository revision: 31cef9a4eac01fff5ff4fcb89d7e2b7815e93bad
Repository branch: HEAD
System Description: Fedora Linux 38 (Workstation Edition)

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locate-dominating-file-patch
Description: Binary data