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bug#39380: 26.3: Opening files in vc-dir-mode with differing root and wo

From: Dmitry Gutov
Subject: bug#39380: 26.3: Opening files in vc-dir-mode with differing root and working dir fails
Date: Mon, 3 Feb 2020 16:11:08 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0

On 03.02.2020 1:35, Wolfgang Scherer wrote:

Am 01.02.20 um 08:20 schrieb Dmitry Gutov:
On 01.02.2020 3:13, Wolfgang Scherer wrote:
3. Press `C-x v d RET`, which will show a "Working dir" different from "Root":

     .. code-block:: text

        Working dir: check-hgs/sub1/
        Root       : check-hgs

        unregistered         sub1/a
        unregistered         sub2/x

Maybe this should be fixed in vc-hg-status-files by not showing "outside" files 
and using proper relative names.

Compare how VC-Dir works with Git: when you open it in a subdirectory, it only 
shows changed files in that directory, and with proper relative names.

The behavior should be consistent.


In Emacs 24/25 vc-dir-mode for Mercurial behaved exactly like Git. Since the 
behavior for Mercurial changed some time after Emacs 24, I just assumed 
(probably because of my bias towards `dvc`) that the new behavior was intended.

In 25 or 26 Daniel added a Lisp-based faster implementation for some commands (de76a167dc09dc695a5acebabb7ab354a6bf556e) since apparently Hg itself was too slow.

So this bug must have arrived with that implementation.

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