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Fix installation of tree-sitter grammar on MS-Windows

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* lisp/treesit.el (treesit--install-language-grammar-1): Fix a
failure on MS-Windows when the old DLL is still being used.
(Bug#61289)
This commit is contained in:
Eli Zaretskii 2023-02-05 11:14:25 +02:00
parent 0358267204
commit f13479d955
1 changed files with 11 additions and 1 deletions
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12
lisp/treesit.el
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@ -2884,7 +2884,17 @@ function signals an error."
;; Copy out.
(unless (file-exists-p out-dir)
(make-directory out-dir t))
(copy-file lib-name (file-name-as-directory out-dir) t t)
(let* ((library-fname (expand-file-name lib-name out-dir))
(old-fname (concat library-fname ".old")))
;; Rename the existing shared library, if any, then
;; install the new one, and try deleting the old one.
;; This is for Windows systems, where we cannot simply
;; overwrite a DLL that is being used.
(if (file-exists-p library-fname)
(rename-file library-fname old-fname t))
(copy-file lib-name (file-name-as-directory out-dir) t t)
;; Ignore errors, in case the old version is still used.
(ignore-errors (delete-file old-fname)))
(message "Library installed to %s/%s" out-dir lib-name))
(when (file-exists-p workdir)
(delete-directory workdir t)))))