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bug#22032: 24.3; VC doesn't handle hg hidden revisions

From: Dmitry Gutov
Subject: bug#22032: 24.3; VC doesn't handle hg hidden revisions
Date: Tue, 15 Dec 2015 16:08:21 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:42.0) Gecko/20100101 Thunderbird/42.0 
Please keep the bug address in Cc.

On 12/15/2015 07:59 AM, Glenn Hutchings wrote:


Alas, omitting "--hidden" causes Mercurial to give an error when passed
a hidden changeset ID.


That's too bad.
But if the revision spec allows open intervals though, we could pass the current (non-hidden) revision to it. Maybe something like 

(defun vc-hg-previous-revision (_file rev)
  (with-temp-buffer
    (vc-hg-command t 0 nil
                   "id" "--hidden" "-n" "-r"
                   (format "second(%s:0 and not hidden())" rev))
    ;; Trim the trailing newline.
    (buffer-substring (point-min) (1- (point-max)))))

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