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-rw-r--r--.dir-locals.el32
1 files changed, 21 insertions, 11 deletions
diff --git a/.dir-locals.el b/.dir-locals.el
index 8e5d3902e3..545c1c3e8b 100644
--- a/.dir-locals.el
+++ b/.dir-locals.el
@@ -17,17 +17,27 @@
;; Geiser
;; This allows automatically setting the `geiser-guile-load-path'
;; variable when using various Guix checkouts (e.g., via git worktrees).
- (eval . (let* ((root-dir (expand-file-name
- (locate-dominating-file
- default-directory ".dir-locals.el")))
- ;; Workaround for bug https://issues.guix.gnu.org/43818.
- (root-dir* (directory-file-name root-dir)))
- (unless (boundp 'geiser-guile-load-path)
- (defvar geiser-guile-load-path '()))
- (make-local-variable 'geiser-guile-load-path)
- (require 'cl-lib)
- (cl-pushnew root-dir* geiser-guile-load-path
- :test #'string-equal)))))
+ (eval . (let ((root-dir-unexpanded (locate-dominating-file
+ default-directory ".dir-locals.el")))
+ ;; While Guix should in theory always have a .dir-locals.el
+ ;; (we are reading this file, after all) there seems to be a
+ ;; strange problem where this code "escapes" to some other buffers,
+ ;; at least vc-mode. See:
+ ;; https://lists.gnu.org/archive/html/guix-devel/2020-11/msg00296.html
+ ;; (TODO: add/replace with upstream emacs bug link when reported)
+ ;; Hence the following "when", which might otherwise be unnecessary;
+ ;; it prevents causing an error when root-dir-unexpanded is nil.
+ (when root-dir-unexpanded
+ (let* ((root-dir (expand-file-name root-dir-unexpanded))
+ ;; Workaround for bug https://issues.guix.gnu.org/43818.
+ (root-dir* (directory-file-name root-dir)))
+
+ (unless (boundp 'geiser-guile-load-path)
+ (defvar geiser-guile-load-path '()))
+ (make-local-variable 'geiser-guile-load-path)
+ (require 'cl-lib)
+ (cl-pushnew root-dir* geiser-guile-load-path
+ :test #'string-equal)))))))
(c-mode . ((c-file-style . "gnu")))
(scheme-mode