* bug#66758: 30.0.50; Show man pages on remote systems
@ 2023-10-26 10:38 Michael Albinus
2023-11-01 15:57 ` Michael Albinus
0 siblings, 1 reply; 2+ messages in thread
From: Michael Albinus @ 2023-10-26 10:38 UTC (permalink / raw)
To: 66758
[-- Attachment #1: Type: text/plain, Size: 26992 bytes --]
Severity: wishlist
It has been mentioned several times over the last years, now I've tried
it. Appended is a patch, which allows to show man pages on remote
systems via Tramp.
There is a new user option `Man-support-remote-systems'. When this is
non-nil, the `man' command runs on the remote system determined by
`default-directory'. When the `man' command is called with a prefix
argument, the value of`Man-support-remote-systems' is reverted.
Following references in man pages to other man pages, or to files, shall
happen on the remote system. Invoking `man' from dired (typing "N" on a
man file) shall also work on remote systems.
Comments?
In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
3.24.38, cairo version 1.18.0) of 2023-10-07 built on gandalf
Repository revision: b583cb81c90ee452c754777e33571dbd23f159ff
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12302001
System Description: Fedora Linux 39 (Workstation Edition)
Configured using:
'configure --with-tree-sitter'
Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
LIBOTF LIBSELINUX LIBXML2 M17N_FLT MODULES NOTIFY INOTIFY PDUMPER PNG
RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER
X11 XDBE XIM XINPUT2 XPM GTK3 ZLIB
Important settings:
value of $LANG: en_US.UTF-8
value of $XMODIFIERS: @im=ibus
locale-coding-system: utf-8
Major mode: Group
Minor modes in effect:
gnus-undo-mode: t
display-time-mode: t
delete-selection-mode: t
icomplete-mode: t
global-goto-address-mode: t
goto-address-mode: t
tooltip-mode: t
global-eldoc-mode: t
show-paren-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
minibuffer-regexp-mode: t
buffer-read-only: t
column-number-mode: t
line-number-mode: t
indent-tabs-mode: t
transient-mark-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
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/home/albinus/.emacs.d/elpa/org-9.6.10/org-duration hides /usr/local/share/emacs/30.0.50/lisp/org/org-duration
/home/albinus/.emacs.d/elpa/org-9.6.10/ox-org hides /usr/local/share/emacs/30.0.50/lisp/org/ox-org
/home/albinus/.emacs.d/elpa/org-9.6.10/org-protocol hides /usr/local/share/emacs/30.0.50/lisp/org/org-protocol
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/home/albinus/.emacs.d/elpa/org-9.6.10/ob-plantuml hides /usr/local/share/emacs/30.0.50/lisp/org/ob-plantuml
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/home/albinus/.emacs.d/elpa/org-9.6.10/ob-clojure hides /usr/local/share/emacs/30.0.50/lisp/org/ob-clojure
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/home/albinus/.emacs.d/elpa/org-9.6.10/org-version hides /usr/local/share/emacs/30.0.50/lisp/org/org-version
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~/lisp/dbus hides /usr/local/share/emacs/30.0.50/lisp/net/dbus
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/home/albinus/src/tramp/lisp/tramp-sudoedit hides /usr/local/share/emacs/30.0.50/lisp/net/tramp-sudoedit
/home/albinus/src/tramp/lisp/tramp-container hides /usr/local/share/emacs/30.0.50/lisp/net/tramp-container
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/home/albinus/src/tramp/lisp/tramp-message hides /usr/local/share/emacs/30.0.50/lisp/net/tramp-message
/home/albinus/src/tramp/lisp/tramp-smb hides /usr/local/share/emacs/30.0.50/lisp/net/tramp-smb
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/home/albinus/src/tramp/lisp/tramp-sshfs hides /usr/local/share/emacs/30.0.50/lisp/net/tramp-sshfs
Features:
(shadow warnings emacsbug ediff-vers ediff ediff-merg ediff-mult
ediff-wind ediff-diff ediff-help ediff-init ediff-util vc-hg vc-bzr
vc-src vc-sccs vc-svn vc-cvs vc-rcs log-view pcvs-util vc-dir ewoc man
help-fns radix-tree cl-print debug backtrace find-func misearch
multi-isearch vc-git diff-mode easy-mmode url-queue mm-archive gnus-fun
url-http url-gw url-auth gnus-gravatar gravatar dns url-cache sort
smiley gnus-cite mail-extr textsec uni-scripts idna-mapping
ucs-normalize uni-confusable textsec-check gnus-bcklg cl-extra
gnus-async qp gnus-ml debbugs-browse bug-reference disp-table pop3 utf-7
nndraft nnmh nnml network-stream nsm gnus-agent gnus-srvr gnus-score
score-mode nnvirtual gnus-msg gnus-art mm-uu mml2015 mm-view mml-smime
smime gnutls dig gnus-cache gnus-sum shr pixel-fill kinsoku url-file svg
dom nnnil smtpmail gnus-demon nntp gnus-group gnus-undo gnus-start
gnus-dbus dbus xml gnus-cloud nnimap nnmail mail-source utf7 nnoo
gnus-spec gnus-int gnus-range message sendmail yank-media puny rfc822
mml mml-sec epa derived epg rfc6068 epg-config mm-decode mm-bodies
mm-encode mail-parse rfc2231 rfc2047 rfc2045 ietf-drums mailabbrev
gmm-utils mailheader gnus-win gnus nnheader gnus-util
text-property-search mail-utils range mm-util mail-prsvr face-remap
ob-shell ob ob-tangle ol org-src ob-ref ob-lob ob-table ob-exp ob-comint
ob-core org-cycle org-fold org-fold-core ob-eval org-keys oc org-compat
org-version org-macs vc vc-dispatcher time tramp-cache time-stamp
tramp-sh lxc-tramp lxd-tramp tramp trampver tramp-integration files-x
tramp-message help-mode tramp-compat xdg shell pcomplete comint ansi-osc
ring parse-time iso8601 time-date format-spec ansi-color tramp-loaddefs
rx delsel ido jka-compr icomplete cus-edit pp cus-load icons wid-edit
dired dired-loaddefs goto-addr thingatpt alert-autoloads
android-mode-autoloads auth-source-gopass-autoloads
auth-source-keytar-autoloads auth-source-kwallet-autoloads
auth-source-xoauth2-autoloads auto-sudoedit-autoloads
auto-virtualenv-autoloads auto-virtualenvwrapper-autoloads
clang-format-autoloads company-shell-autoloads company-autoloads
counsel-toki-autoloads counsel-tramp-autoloads counsel-autoloads
dbus-codegen-autoloads debbugs-autoloads dired-du-autoloads
dired-rsync-autoloads dired-toggle-sudo-autoloads direnv-autoloads
disk-usage-autoloads dockerfile-mode-autoloads ednc-autoloads
el-get-autoloads envrc-autoloads etc-sudoers-mode-autoloads
exec-path-from-shell-autoloads fontaine-autoloads forge-autoloads
closql-autoloads emacsql-autoloads friendly-tramp-path-autoloads
ggtags-autoloads ghub-autoloads gited-autoloads
gitlab-ci-mode-flycheck-autoloads gitlab-ci-mode-autoloads
flycheck-autoloads gntp-autoloads gnus-desktop-notify-autoloads
helm-gitlab-autoloads helm-projectile-autoloads helm-autoloads
helm-core-autoloads async-autoloads ibuffer-tramp-autoloads
inheritenv-autoloads ivy-gitlab-autoloads gitlab-autoloads
jarchive-autoloads journalctl-mode-autoloads keepass-mode-autoloads
keytar-autoloads kubel-autoloads kubernetes-autoloads log4e-autoloads
lsp-java-autoloads dap-mode-autoloads lsp-docker-autoloads bui-autoloads
lsp-treemacs-autoloads lsp-mode-autoloads lxc-tramp-autoloads
lxd-tramp-autoloads magit-filenotify-autoloads magit-autoloads pcase
git-commit-autoloads magit-popup-autoloads magit-section-autoloads
marcopolo-autoloads mastodon-autoloads nexus-autoloads
nnir-est-autoloads oauth2-autoloads ob-restclient-autoloads
orderless-autoloads org-autoloads org-tree-slide-autoloads
persist-autoloads pkg-info-autoloads epl-autoloads popup-autoloads
projectile-autoloads promise-autoloads pyenv-mode-autoloads
pylint-autoloads python-environment-autoloads deferred-autoloads
pythonic-autoloads f-autoloads pyvenv-autoloads
recentf-remove-sudo-tramp-prefix-autoloads relint-autoloads
request-autoloads restclient-test-autoloads restclient-autoloads
s3ed-autoloads finder-inf slime-autoloads macrostep-autoloads
spinner-autoloads ssh-deploy-autoloads su-autoloads sudo-edit-autoloads
sudo-ext-autoloads sudo-utils-autoloads swiper-autoloads ivy-autoloads
sx-autoloads markdown-mode-autoloads telepathy-autoloads
tramp-theme-autoloads transient-dwim-autoloads transient-autoloads
treemacs-autoloads cfrs-autoloads posframe-autoloads ht-autoloads
pfuture-autoloads ace-window-autoloads avy-autoloads treepy-autoloads
urgrep-autoloads uuid-autoloads vdiff-autoloads hydra-autoloads
lv-autoloads vertico-autoloads virtualenv-autoloads
virtualenvwrapper-autoloads s-autoloads dash-autoloads
web-server-autoloads wfnames-autoloads with-editor-autoloads info
compat-autoloads xr-autoloads yaml-autoloads yaml-mode-autoloads package
browse-url url url-proxy url-privacy url-expand url-methods url-history
url-cookie generate-lisp-file url-domsuf url-util mailcap url-handlers
url-parse auth-source cl-seq eieio eieio-core cl-macs password-cache
json subr-x map byte-opt gv bytecomp byte-compile url-vars cl-loaddefs
cl-lib rmc iso-transl tooltip cconv eldoc paren electric uniquify
ediff-hook vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win
term/common-win x-dnd touch-screen 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 nadvice seq simple cl-generic indonesian philippine
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 abbrev obarray oclosure
cl-preloaded button loaddefs theme-loaddefs faces cus-face macroexp
files window text-properties overlay sha1 md5 base64 format env
code-pages mule custom widget keymap hashtable-print-readable backquote
threads dbusbind inotify dynamic-setting system-font-setting
font-render-setting cairo gtk x-toolkit xinput2 x multi-tty move-toolbar
make-network-process emacs)
Memory information:
((conses 16 404158 101357) (symbols 48 26135 4)
(strings 32 104289 7218) (string-bytes 1 3127878) (vectors 16 75440)
(vector-slots 8 1776953 237943) (floats 8 324 5998)
(intervals 56 1773 2172) (buffers 992 27))
Best regards, Michael.
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: Type: text/x-patch, Size: 11262 bytes --]
diff --git a/lisp/dired.el b/lisp/dired.el
index cc8c74839b9..2aea4f1c90a 100644
--- a/lisp/dired.el
+++ b/lisp/dired.el
@@ -4996,6 +4996,7 @@ dired-jump-map
;;; Miscellaneous commands
(declare-function Man-getpage-in-background "man" (topic))
+(defvar Man-support-remote-systems) ; from man.el
(defvar manual-program) ; from man.el
(defun dired-do-man ()
@@ -5003,10 +5004,11 @@ dired-do-man
(interactive nil dired-mode)
(require 'man)
(let* ((file (dired-get-file-for-visit))
+ (Man-support-remote-systems (file-remote-p file))
(manual-program (string-replace "*" "%s"
(dired-guess-shell-command
"Man command: " (list file)))))
- (Man-getpage-in-background file)))
+ (Man-getpage-in-background (file-local-name file))))
(defun dired-do-info ()
"In Dired, run `info' on this file."
diff --git a/lisp/man.el b/lisp/man.el
index 506d6060269..91750227d4a 100644
--- a/lisp/man.el
+++ b/lisp/man.el
@@ -105,6 +105,13 @@ Man-prefer-synchronous-call
:group 'man
:version "30.1")
+(defcustom Man-support-remote-systems nil
+ "Whether to call the Un*x \"man\" program on remote systems.
+When this is non-nil, call the \"man\" program on the remote
+system determined by `default-directory'."
+ :type 'boolean
+ :version "30.1")
+
(defcustom Man-filter-list nil
"Manpage cleaning filter command phrases.
This variable contains a list of the following form:
@@ -264,6 +271,34 @@ Man-header-file-path
:type '(repeat string)
:group 'man)
+(defun Man-header-file-path ()
+ "C Header file search path used in Man.
+In the local case, it is the value of `Man-header-file-path'.
+Otherwise, it will be checked on the remote system."
+ (let ((remote-id (file-remote-p default-directory)))
+ (if (null remote-id)
+ ;; The local case.
+ Man-header-file-path
+ ;; The remote case. Use connection-local variables.
+ (mapcar
+ (lambda (elt) (concat remote-id elt))
+ (with-connection-local-variables
+ (or (and (local-variable-p 'Man-header-file-path (current-buffer))
+ Man-header-file-path)
+ (setq-connection-local
+ Man-header-file-path
+ (let ((arch (with-temp-buffer
+ (when (zerop (ignore-errors
+ (process-file "gcc" nil '(t nil) nil
+ "-print-multiarch")))
+ (goto-char (point-min))
+ (buffer-substring (point) (line-end-position)))))
+ (base '("/usr/include" "/usr/local/include")))
+ (if (zerop (length arch))
+ base
+ (append
+ base (list (expand-file-name arch "/usr/include"))))))))))))
+
(defcustom Man-name-local-regexp (concat "^" (regexp-opt '("NOM" "NAME")) "$")
"Regexp that matches the text that precedes the command's name.
Used in `bookmark-set' to get the default bookmark name."
@@ -531,8 +566,9 @@ 'Man-xref-header-file
(define-button-type 'Man-xref-normal-file
'action (lambda (button)
- (let ((f (substitute-in-file-name
- (button-get button 'Man-target-string))))
+ (let ((f (concat (file-remote-p default-directory)
+ (substitute-in-file-name
+ (button-get button 'Man-target-string)))))
(if (file-exists-p f)
(if (file-readable-p f)
(view-file f)
@@ -545,6 +581,29 @@ 'Man-xref-normal-file
;; ======================================================================
;; utilities
+(defun Man-default-directory ()
+ "Return a default directory according to `Man-support-remote-systems'."
+ ;; Ensure that `default-directory' exists and is readable.
+ ;; We assume, that this function is always called inside the `man'
+ ;; command, so that we can check `current-prefix-arg' for reverting
+ ;; `Man-support-remote-systems'.
+ (let ((result default-directory)
+ (remote (if current-prefix-arg
+ (not Man-support-remote-systems)
+ Man-support-remote-systems)))
+
+ ;; Use a local directory if remote isn't possible.
+ (when (and (file-remote-p default-directory)
+ (not (and remote
+ ;; TODO:: Test that remote processes are supported.
+ )))
+ (setq result (expand-file-name "~/")))
+
+ ;; Check, whether the directory is accessible.
+ (if (file-accessible-directory-p result)
+ result
+ (expand-file-name (concat (file-remote-p result) "~/")))))
+
(defun Man-init-defvars ()
"Used for initializing variables based on display's color support.
This is necessary if one wants to dump man.el with Emacs."
@@ -583,7 +642,9 @@ Man-init-defvars
(if Man-sed-script
(concat "-e '" Man-sed-script "'")
"")
- "-e '/^[\001-\032][\001-\032]*$/d'"
+ ;; Use octal numbers. Otherwise, \032 (Ctrl-Z) would
+ ;; suspend remote connections.
+ "-e '/^[\\o001-\\o032][\\o001-\\o032]*$/d'"
"-e '/\e[789]/s///g'"
"-e '/Reformatting page. Wait/d'"
"-e '/Reformatting entry. Wait/d'"
@@ -717,22 +778,23 @@ Man-support-local-filenames
a \"/\" as a local filename. The function returns either `man-db'
`man', or nil."
(if (eq Man-support-local-filenames 'auto-detect)
- (setq Man-support-local-filenames
- (with-temp-buffer
- (let ((default-directory
- ;; Ensure that `default-directory' exists and is readable.
- (if (file-accessible-directory-p default-directory)
- default-directory
- (expand-file-name "~/"))))
- (ignore-errors
- (call-process manual-program nil t nil "--help")))
- (cond ((search-backward "--local-file" nil 'move)
- 'man-db)
- ;; This feature seems to be present in at least ver 1.4f,
- ;; which is about 20 years old.
- ;; I don't know if this version has an official name?
- ((looking-at "^man, versione? [1-9]")
- 'man))))
+ (with-connection-local-variables
+ (or (and (local-variable-p 'Man-support-local-filenames (current-buffer))
+ Man-support-local-filenames)
+ (setq-connection-local
+ Man-support-local-filenames
+ (with-temp-buffer
+ (let ((default-directory (Man-default-directory)))
+ (ignore-errors
+ (process-file manual-program nil t nil "--help")))
+ (cond ((search-backward "--local-file" nil 'move)
+ 'man-db)
+ ;; This feature seems to be present in at least
+ ;; ver 1.4f, which is about 20 years old. I
+ ;; don't know if this version has an official
+ ;; name?
+ ((looking-at "^man, versione? [1-9]")
+ 'man))))))
Man-support-local-filenames))
\f
@@ -918,7 +980,8 @@ Man-completion-table
(unless (and Man-completion-cache
(string-prefix-p (car Man-completion-cache) prefix))
(with-temp-buffer
- (setq default-directory "/") ;; in case inherited doesn't exist
+ ;; In case inherited doesn't exist.
+ (setq default-directory (Man-default-directory))
;; Actually for my `man' the arg is a regexp.
;; POSIX says it must be ERE and "man-db" seems to agree,
;; whereas under macOS it seems to be BRE-style and doesn't
@@ -932,7 +995,7 @@ Man-completion-table
;; error later.
(when (eq 0
(ignore-errors
- (call-process
+ (process-file
manual-program nil '(t nil) nil
"-k" (concat (when (or Man-man-k-use-anchor
(string-equal prefix ""))
@@ -1016,7 +1079,14 @@ man
Note that in some cases you will need to use \\[quoted-insert] to quote the
SPC character in the above examples, because this command attempts
-to auto-complete your input based on the installed manual pages."
+to auto-complete your input based on the installed manual pages.
+
+If `default-directory' is remote, and `Man-support-remote-systems'
+is non-nil, the man page will be formatted on the corresponding
+remote system.
+
+If `man' is called interactively with a prefix argument, the
+value of `Man-support-remote-systems' is reverted."
(interactive
(list (let* ((default-entry (Man-default-man-entry))
@@ -1082,12 +1152,7 @@ Man-start-calling
Man-coding-system
locale-coding-system))
;; Avoid possible error by using a directory that always exists.
- (default-directory
- (if (and (file-directory-p default-directory)
- (not (find-file-name-handler default-directory
- 'file-directory-p)))
- default-directory
- "/")))
+ (default-directory (Man-default-directory)))
;; Prevent any attempt to use display terminal fanciness.
(setenv "TERM" "dumb")
;; In Debian Woody, at least, we get overlong lines under X
@@ -1137,18 +1202,18 @@ Man-getpage-in-background
(Man-start-calling
(if (and (fboundp 'make-process)
(not Man-prefer-synchronous-call))
- (let ((proc (start-process
+ (let ((proc (start-file-process
manual-program buffer
(if (memq system-type '(cygwin windows-nt))
shell-file-name
- "sh")
+ "/bin/sh")
shell-command-switch
(format (Man-build-man-command) man-args))))
(set-process-sentinel proc 'Man-bgproc-sentinel)
(set-process-filter proc 'Man-bgproc-filter))
(let* ((inhibit-read-only t)
(exit-status
- (call-process shell-file-name nil (list buffer nil) nil
+ (process-file "/bin/sh" nil (list buffer nil) nil
shell-command-switch
(format (Man-build-man-command) man-args)))
(msg ""))
@@ -1178,7 +1243,7 @@ Man-update-manpage
(buffer-read-only nil))
(erase-buffer)
(Man-start-calling
- (call-process shell-file-name nil (list (current-buffer) nil) nil
+ (process-file "/bin/sh" nil (list (current-buffer) nil) nil
shell-command-switch
(format (Man-build-man-command) Man-arguments)))
(if Man-fontify-manpage-flag
@@ -1944,7 +2009,7 @@ Man-previous-manpage
;; Header file support
(defun Man-view-header-file (file)
"View a header file specified by FILE from `Man-header-file-path'."
- (let ((path Man-header-file-path)
+ (let ((path (Man-header-file-path))
complete-path)
(while path
(setq complete-path (expand-file-name file (car path))
^ permalink raw reply related [flat|nested] 2+ messages in thread* bug#66758: 30.0.50; Show man pages on remote systems
2023-10-26 10:38 bug#66758: 30.0.50; Show man pages on remote systems Michael Albinus
@ 2023-11-01 15:57 ` Michael Albinus
0 siblings, 0 replies; 2+ messages in thread
From: Michael Albinus @ 2023-11-01 15:57 UTC (permalink / raw)
To: 66758-done
Version: 30.1
Michael Albinus <michael.albinus@gmx.de> writes:
> It has been mentioned several times over the last years, now I've tried
> it. Appended is a patch, which allows to show man pages on remote
> systems via Tramp.
>
> There is a new user option `Man-support-remote-systems'. When this is
> non-nil, the `man' command runs on the remote system determined by
> `default-directory'. When the `man' command is called with a prefix
> argument, the value of`Man-support-remote-systems' is reverted.
>
> Following references in man pages to other man pages, or to files, shall
> happen on the remote system. Invoking `man' from dired (typing "N" on a
> man file) shall also work on remote systems.
>
> Comments?
No further comment, so I've pushed it to master. Closing the report.
Best regards, Michael.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2023-10-26 10:38 bug#66758: 30.0.50; Show man pages on remote systems Michael Albinus
2023-11-01 15:57 ` Michael Albinus
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