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bug#11348: 24.0.95; TAB-completion in shell-command produces d:\/foo on


From: Chong Yidong
Subject: bug#11348: 24.0.95; TAB-completion in shell-command produces d:\/foo on MS-Windows
Date: Mon, 07 May 2012 16:01:15 +0800
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.96 (gnu/linux)

Eli Zaretskii <address@hidden> writes:

>> I installed the patch below, which seems to fix this specific problem
>> (according to my testing under Wine ;-)
>
> I'm not sure why it worked for you, because it still doesn't for me.

I also still see the bug, running under Wine.

> IOW, the problem is that shell-parse-pcomplete-arguments removes the
> backslash in "d:\gnu", because the last alternative in the above
> regexp treats backslashes as escape characters, which on MS-DOS and
> MS-Windows is true (for shell commands) only when the backslash
> precedes a quote character (").

How about something like the following?  (Works for me on Wine with your
test case, but I don't know if it breaks quoting.)


=== modified file 'lisp/shell.el'
*** lisp/shell.el       2012-05-05 04:18:49 +0000
--- lisp/shell.el       2012-05-07 07:59:33 +0000
***************
*** 397,402 ****
--- 397,408 ----
                       ((null pcomplete-arg-quote-list)
                        (goto-char (match-beginning 3)) "\\")
                       ((= (match-beginning 3) (match-end 3)) "\\")
+                    ;; On Windows, the backslash is an escape
+                    ;; character only if it precedes a quote char.
+                    ((and (memq system-type
+                                '(ms-dos windows-nt darwin cygwin))
+                          (not (equal (match-string 3) "\"")))
+                     (concat "/" (match-string 3)))
                       (t (match-string 3)))
                      arg))
               ((match-beginning 2)       ;Double quote.






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