bug#51112: 28.0.50; vc-print-log shows empty log

bug#51112: 28.0.50; vc-print-log shows empty log

[Michael Albinus]

This has been reported on the Tramp mailing list, see
<https://lists.gnu.org/archive/html/tramp-devel/2021-10/msg00026.html>.

If you run Emacs on MS Windows, and you try to print the git log of a
remote file, you don't get anything. This is because vc-print-log has
emitted the following command:

--8<---------------cut here---------------start------------->8---
git --no-pager log --no-color -n 2000 -- \:\(literal\)c\:/tmp/tramp/README
--8<---------------cut here---------------end--------------->8---

See the leading drive letter "c:" in the file name. The problem is
`vc-git--literal-pathspec', which calls `expand-file-name' on the
*local* part of the remote file name.

A fix could be

--8<---------------cut here---------------start------------->8---
(defun vc-git--literal-pathspec (file)
  "Prepend :(literal) path magic to FILE."
  ;; Good example of file name that needs this: "test[56].xx".
  (when file
    ;; Expand abbreviated file names.
    (concat ":(literal)" (file-local-name (expand-file-name file)))))
--8<---------------cut here---------------end--------------->8---


In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.30, cairo version 1.17.4)
 of 2021-09-26 built on gandalf
Repository revision: 94af99b298381d7d8e08b6d76de00906c74d9421
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12011000
System Description: Fedora 34 (Workstation Edition)

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
LCMS2 LIBOTF LIBSELINUX LIBXML2 M17N_FLT MODULES NOTIFY INOTIFY PDUMPER
PNG RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS X11 XDBE XIM XPM
GTK3 ZLIB

Important settings:
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8

Major mode: Message

Minor modes in effect:
  async-bytecomp-package-mode: t
  global-git-commit-mode: t
  magit-auto-revert-mode: t
  gnus-message-citation-mode: t
  mml-mode: t
  display-time-mode: t
  shell-dirtrack-mode: t
  delete-selection-mode: t
  icomplete-mode: t
  show-paren-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  auto-fill-function: message-do-auto-fill
  transient-mark-mode: t
  abbrev-mode: t

Load-path shadows:
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/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-gvfs hides /home/albinus/src/tramp/lisp/tramp-gvfs
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-smb hides /home/albinus/src/tramp/lisp/tramp-smb
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/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp hides /home/albinus/src/tramp/lisp/tramp
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/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-adb hides /usr/local/share/emacs/site-lisp/tramp-adb
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp hides /usr/local/share/emacs/site-lisp/tramp
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-cache hides /usr/local/share/emacs/site-lisp/tramp-cache
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-rclone hides /usr/local/share/emacs/site-lisp/tramp-rclone
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/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-integration hides /usr/local/share/emacs/site-lisp/tramp-integration
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/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-loaddefs hides /usr/local/share/emacs/site-lisp/tramp-loaddefs
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-uu hides /usr/local/share/emacs/site-lisp/tramp-uu
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-smb hides /usr/local/share/emacs/site-lisp/tramp-smb
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/trampver hides /usr/local/share/emacs/site-lisp/trampver
/home/albinus/.emacs.d/elpa/auth-source-pass-20210210.1908/auth-source-pass hides /usr/local/share/emacs/28.0.50/lisp/auth-source-pass
/home/albinus/.emacs.d/elpa/transient-20210920.1038/transient hides /usr/local/share/emacs/28.0.50/lisp/transient
~/lisp/dbus hides /usr/local/share/emacs/28.0.50/lisp/net/dbus
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-sh hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-sh
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-fuse hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-fuse
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-ftp hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-ftp
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp hides /usr/local/share/emacs/28.0.50/lisp/net/tramp
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-cache hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-cache
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-uu hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-uu
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-rclone hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-rclone
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-integration hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-integration
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-archive hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-archive
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-adb hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-adb
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-cmds hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-cmds
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-compat hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-compat
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-sudoedit hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-sudoedit
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-gvfs hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-gvfs
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-loaddefs hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-loaddefs
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-crypt hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-crypt
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-smb hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-smb
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/trampver hides /usr/local/share/emacs/28.0.50/lisp/net/trampver
/home/albinus/.emacs.d/elpa/tramp-2.5.1.3/tramp-sshfs hides /usr/local/share/emacs/28.0.50/lisp/net/tramp-sshfs

Features:
(tramp-adb tramp-archive tramp-cmds tramp-ftp make-mode macros
dockerfile-mode sh-script smie executable gnus-eform nndir nnfolder
cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine
cc-vars cc-defs helm-for-files helm-comint helm-imenu
semantic/util-modes semantic/util semantic semantic/tag semantic/lex
semantic/fw mode-local cedet helm-bookmark helm-external helm-mode
helm-elisp helm-files image-dired dired-x ffap helm-buffers helm-tags
helm-locate helm-eval edebug helm-occur helm-grep helm-regexp helm-net
helm-adaptive helm-info helm-utils helm-types helm-help helm
async-bytecomp helm-global-bindings helm-easymenu helm-source
helm-multi-match async helm-lib lsp-html lsp-icons lsp-completion
lsp-semantic-tokens lsp-mode lsp-protocol tree-widget spinner lv inline
ht f git-rebase magit-bookmark bookmark magit-submodule magit-obsolete
magit-blame magit-stash magit-reflog magit-bisect magit-push magit-pull
magit-fetch magit-clone magit-remote magit-commit magit-sequence
magit-notes magit-worktree magit-tag magit-merge magit-branch
magit-reset magit-files magit-refs magit-status magit magit-repos
magit-apply magit-wip magit-log magit-diff git-commit magit-core
magit-autorevert magit-margin magit-transient magit-process which-func
imenu with-editor magit-mode transient magit-git magit-section benchmark
gnus-topic request autorevert filenotify anaphora virtualenvwrapper gud
s json-rpc python sound-wav deferred org-agenda org-refile alert log4e
notifications gntp skeleton ibuf-macs ibuf-ext ibuffer ibuffer-loaddefs
promise-rejection-tracking promise-finally promise-done
promise-es6-extensions promise-core trace ert-x ert tramp-gvfs zeroconf
eshell esh-cmd esh-ext esh-opt esh-proc esh-io esh-arg esh-module
esh-groups server autoload lisp-mnt tar-mode arc-mode archive-mode
cus-edit cus-start cus-load finder-inf org-element avl-tree generator
ol-eww ol-rmail ol-mhe ol-irc ol-info ol-gnus nnselect gnus-search
ol-docview doc-view image-mode exif ol-bibtex bibtex ol-bbdb ol-w3m org
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org-version ob-emacs-lisp org-table org-loaddefs cal-menu calendar
cal-loaddefs debug backtrace markdown-mode magit-utils pcase emba glab
ghub-graphql treepy gsexp ghub let-alist log-view whitespace log-edit
pcvs-util ediff-vers ediff ediff-merg ediff-mult ediff-wind ediff-diff
ediff-help ediff-init ediff-util vc-dir ewoc eieio-opt speedbar ezimage
dframe find-func shortdoc cl-print noutline outline tramp-sshfs
tramp-fuse esh-util help-fns radix-tree texinfo texinfo-loaddefs pulse
bug-reference vc-mtn vc-hg vc-bzr vc-src vc-sccs vc-svn vc-cvs vc-rcs
find-dired xref project grep compile misearch multi-isearch vc-git
yaml-mode dired-aux mailalias shadow emacsbug nndoc gnus-dup crm
debbugs-gnu add-log debbugs soap-client warnings rng-xsd rng-dt rng-util
xsd-regexp smerge-mode diff diff-mode easy-mmode pp timezone eww xdg
thingatpt mm-url time-stamp url-queue shr-color color flow-fill
mm-archive gnus-fun url-http url-gw url-auth gnus-gravatar gravatar dns
url-cache sort smiley gnus-cite mail-extr gnus-bcklg mule-util
gnus-async cl-extra help-mode qp gnus-ml pop3 utf-7 nndraft nnmh nnml
gnutls network-stream nsm gnus-agent gnus-srvr gnus-score score-mode
nnvirtual gnus-msg gnus-art mm-uu mml2015 mm-view mml-smime smime dig
gnus-cache gnus-sum shr kinsoku svg dom nnnil smtpmail sendmail
gnus-demon nntp gnus-group gnus-undo gnus-start gnus-dbus dbus xml
gnus-cloud nnimap nnmail mail-source utf7 netrc nnoo gnus-spec gnus-int
gnus-range message rmc puny rfc822 mml mml-sec epa derived epg rfc6068
epg-config mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader gnus-win gnus nnheader gnus-util rmail
rmail-loaddefs rfc2047 rfc2045 ietf-drums text-property-search
mail-utils mm-util mail-prsvr wid-edit edmacro kmacro face-remap
ob-shell ob ob-tangle ol org-src ob-ref ob-lob ob-table ob-exp ob-comint
ob-core ob-eval org-keys org-compat advice org-macs vc vc-dispatcher
cperl-mode rx facemenu time tramp-sh docker-tramp kubernetes-tramp
tramp-cache lxc-tramp lxd-tramp vagrant-tramp dash term disp-table ehelp
tramp tramp-loaddefs trampver tramp-integration files-x tramp-compat
shell pcomplete comint ansi-color ring parse-time iso8601 time-date
ls-lisp format-spec delsel ido jka-compr icomplete paren dired
dired-loaddefs info package browse-url url url-proxy url-privacy
url-expand url-methods url-history url-cookie url-domsuf url-util
mailcap url-handlers url-parse auth-source cl-seq eieio eieio-core
cl-macs eieio-loaddefs password-cache json subr-x map url-vars seq
byte-opt gv bytecomp byte-compile cconv cl-loaddefs cl-lib iso-transl
tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type
elisp-mode mwheel term/x-win x-win term/common-win x-dnd tool-bar dnd
fontset image regexp-opt fringe tabulated-list replace newcomment
text-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow
isearch easymenu timer select scroll-bar mouse jit-lock font-lock syntax
font-core term/tty-colors frame minibuffer cl-generic cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese composite emoji-zwj charscript charprop
case-table epa-hook jka-cmpr-hook help simple abbrev obarray
cl-preloaded nadvice button loaddefs faces cus-face macroexp files
window text-properties overlay sha1 md5 base64 format env code-pages
mule custom widget hashtable-print-readable backquote threads dbusbind
inotify lcms2 dynamic-setting system-font-setting font-render-setting
cairo move-toolbar gtk x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 2958714 377787)
 (symbols 48 69907 28)
 (strings 32 434184 72294)
 (string-bytes 1 22686982)
 (vectors 16 140465)
 (vector-slots 8 2459768 224714)
 (floats 8 1203 7214)
 (intervals 56 544255 3222)
 (buffers 992 134))

bug#51112: 28.0.50; vc-print-log shows empty log

[Dmitry Gutov]

Hi Michael,

On 10.10.2021 10:46, Michael Albinus wrote:
> This has been reported on the Tramp mailing list, see
> <https://lists.gnu.org/archive/html/tramp-devel/2021-10/msg00026.html>.
> 
> If you run Emacs on MS Windows, and you try to print the git log of a
> remote file, you don't get anything. This is because vc-print-log has
> emitted the following command:
> 
> --8<---------------cut here---------------start------------->8---
> git --no-pager log --no-color -n 2000 -- \:\(literal\)c\:/tmp/tramp/README
> --8<---------------cut here---------------end--------------->8---
> 
> See the leading drive letter "c:" in the file name. The problem is
> `vc-git--literal-pathspec', which calls `expand-file-name' on the
> *local*  part of the remote file name.
> 
> A fix could be
> 
> --8<---------------cut here---------------start------------->8---
> (defun vc-git--literal-pathspec (file)
>    "Prepend :(literal) path magic to FILE."
>    ;; Good example of file name that needs this: "test[56].xx".
>    (when file
>      ;; Expand abbreviated file names.
>      (concat ":(literal)" (file-local-name (expand-file-name file)))))
> --8<---------------cut here---------------end--------------->8---

Does this patch work for you?

diff --git a/lisp/vc/vc-git.el b/lisp/vc/vc-git.el
index eca8d547a9..35c0838dd6 100644
--- a/lisp/vc/vc-git.el
+++ b/lisp/vc/vc-git.el
@@ -242,15 +242,14 @@ vc-git-update-on-retrieve-tag
  ;;;###autoload         (load "vc-git" nil t)
  ;;;###autoload         (vc-git-registered file))))

+;; Good example of file name that needs this: "test[56].xx".
  (defun vc-git--literal-pathspec (file)
    "Prepend :(literal) path magic to FILE."
-  ;; Good example of file name that needs this: "test[56].xx".
    (when file
-    (let ((lname (file-local-name file)))
-      ;; Expand abbreviated file names.
-      (when (file-name-absolute-p lname)
-        (setq lname (expand-file-name lname)))
-      (concat ":(literal)" lname))))
+    ;; Expand abbreviated file names.
+    (when (file-name-absolute-p file)
+      (setq file (expand-file-name file)))
+    (concat ":(literal)" (file-local-name file))))

  (defun vc-git--literal-pathspecs (files)
    "Prepend :(literal) path magic to FILES."

bug#51112: 28.0.50; vc-print-log shows empty log

[Michael Albinus]

Dmitry Gutov <dgutov@yandex.ru> writes:

> Hi Michael,

Hi Dmitry,

> Does this patch work for you?

It does.

Best regards, Michael.

bug#51112: 28.0.50; vc-print-log shows empty log

[Dmitry Gutov]

On 11.10.2021 11:09, Michael Albinus wrote:
> Dmitry Gutov<dgutov@yandex.ru>  writes:
> 
>> Hi Michael,
> Hi Dmitry,
> 
>> Does this patch work for you?
> It does.

Thanks for checking, installed.

bug#51112: 28.0.50; vc-print-log shows empty log

[Stefan Kangas]

Dmitry Gutov <dgutov@yandex.ru> writes:

> On 11.10.2021 11:09, Michael Albinus wrote:
>> Dmitry Gutov<dgutov@yandex.ru>  writes:
>>
>>> Hi Michael,
>> Hi Dmitry,
>>
>>> Does this patch work for you?
>> It does.
>
> Thanks for checking, installed.

I'm therefore closing this bug report.

bug#51112: 28.0.50; vc-print-log shows empty log

[Dmitry Gutov]

On 11.10.2021 17:18, Stefan Kangas wrote:
> Dmitry Gutov <dgutov@yandex.ru> writes:
> 
>> On 11.10.2021 11:09, Michael Albinus wrote:
>>> Dmitry Gutov<dgutov@yandex.ru>  writes:
>>>
>>>> Hi Michael,
>>> Hi Dmitry,
>>>
>>>> Does this patch work for you?
>>> It does.
>>
>> Thanks for checking, installed.
> 
> I'm therefore closing this bug report.

Thank you.

After a recent update, my Thunderbird often fails to save the edited 
address (where I added -done to the bug email), as it was in this case, 
so I'm happy to leave this responsibility to others, on occasion.

bug#51112: 28.0.50; vc-print-log shows empty log

[ASANO Fumihisa]

I apply this path to emacs-28 HEAD.

The remote file is OK.
But the Local file is NG. Emacs say "File is not under version control".

I try with Git for Windows 2.33.0.2 and Git in cygwin.

bug#51112: 28.0.50; vc-print-log shows empty log

[Dmitry Gutov]

Hi!

On 12.10.2021 00:57, ASANO Fumihisa wrote:
> I apply this path to emacs-28 HEAD.

You can update to the latest version of the emacs-28 branch, the patch 
is already there.

> The remote file is OK.
> But the Local file is NG. Emacs say "File is not under version control".

Does this happen with all files on your machine, with any VC-related 
command? Or just particular files and/or particular commands?

I don't have a Windows/Cygwin machine I can test this on, unfortunately.

bug#51112: 28.0.50; vc-print-log shows empty log

[ASANO Fumihisa]

I pulled latest repository and try again.
Then Local and Remote is OK.
Thanks.
And sorry my misunderstanding.

bug#51112: 28.0.50; vc-print-log shows empty log

[Dmitry Gutov]

On 12.10.2021 09:15, ASANO Fumihisa wrote:
> I pulled latest repository and try again.
> Then Local and Remote is OK.
> Thanks.
> And sorry my misunderstanding.

Thanks for checking.