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* lisp/emacs-lisp/package.el (package-get-version): Add fallback

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This commit is contained in:
Stefan Monnier 2021-12-31 00:03:35 -05:00
parent 59732a83c8
commit 87f7412418
1 changed files with 4 additions and 1 deletions
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5
lisp/emacs-lisp/package.el
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@ -4076,7 +4076,9 @@ The list is displayed in a buffer named `*Packages*'."
"Return the version number of the package in which this is used.
Assumes it is used from an Elisp file placed inside the top-level directory
of an installed ELPA package.
The return value is a string (or nil in case we can't find it)."
The return value is a string (or nil in case we can't find it).
It works in more cases if the call is in the file which contains
the `Version:' header."
;; In a sense, this is a lie, but it does just what we want: precompute
;; the version at compile time and hardcodes it into the .elc file!
(declare (pure t))
@ -4095,6 +4097,7 @@ The return value is a string (or nil in case we can't find it)."
(let* ((pkgdir (file-name-directory file))
(pkgname (file-name-nondirectory (directory-file-name pkgdir)))
(mainfile (expand-file-name (concat pkgname ".el") pkgdir)))
(unless (file-readable-p mainfile) (setq mainfile file))
(when (file-readable-p mainfile)
(require 'lisp-mnt)
(with-temp-buffer