From: Eli Zaretskii <eliz@gnu.org>
Date: Fri, 8 Feb 2019 06:59:23 +0000 (+0200)
Subject: Fix failures of vc-find-revision with non-ASCII file names
X-Git-Tag: emacs-26.1.92~29
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=459b669;p=emacs.git

Fix failures of vc-find-revision with non-ASCII file names

* lisp/vc/vc.el (vc-find-revision): Instead of binding
coding-system-for-write, make the buffer-file-coding-system of
the temporary buffer be no-conversion.  This avoids the
unwanted side effect of not encoding the command-line
arguments of the VCS commands invoked by the backend.
(Bug#34350)
---

diff --git a/lisp/vc/vc.el b/lisp/vc/vc.el
index 9925196f737..326284f4446 100644
--- a/lisp/vc/vc.el
+++ b/lisp/vc/vc.el
@@ -1966,10 +1966,13 @@ Use BACKEND as the VC backend if specified."
 	(with-current-buffer filebuf
 	  (let ((failed t))
 	    (unwind-protect
-		(let ((coding-system-for-read 'no-conversion)
-		      (coding-system-for-write 'no-conversion))
+		(let ((coding-system-for-read 'no-conversion))
 		  (with-temp-file filename
 		    (let ((outbuf (current-buffer)))
+                      ;; We will read the backend's output with no
+                      ;; conversions, so we should also save the
+                      ;; temporary file with no encoding conversions.
+                      (setq buffer-file-coding-system 'no-conversion)
 		      ;; Change buffer to get local value of
 		      ;; vc-checkout-switches.
 		      (with-current-buffer filebuf