bug#53283: 28.0.91; TRAMP SSHFS method not known by default

[Philipp Stephani]

First, thanks for adding the SSHFS method, it works really well in
general!  However, I think it should be available by default:

$ emacs -Q -batch -eval '(print (directory-files "/ssh:localhost:/sys"))'
Tramp: Sending command ‘exec ssh -e none localhost’
Tramp: Found remote shell prompt on ‘localhost’

("." ".." "block" "bus" "class" "dev" "devices" "firmware" "fs" "hypervisor" 
"kernel" "module" "power")

(as expected)

But:

$ emacs -Q -batch -eval '(print (directory-files "/sshfs:localhost:/sys/"))'
, Method ‘sshfs’ is not known.
Debugger entered--Lisp error: (user-error "Method ‘sshfs’ is not known.")
  signal(user-error ("Method ‘sshfs’ is not known."))
  tramp-error((tramp-file-name "sshfs" nil nil "localhost" nil "/sys/" nil) 
user-error "Method `%s' is not known." "sshfs")
  apply(tramp-error (tramp-file-name "sshfs" nil nil "localhost" nil "/sys/" 
nil) user-error "Method `%s' is not known." "sshfs")
  tramp-user-error((tramp-file-name "sshfs" nil nil "localhost" nil "/sys/" 
nil) "Method `%s' is not known." "sshfs")
  tramp-dissect-file-name("/sshfs:localhost:/sys/")
  tramp-file-name-handler(expand-file-name "/sshfs:localhost:/sys/" nil)
  expand-file-name("/sshfs:localhost:/sys/" nil)
  apply(expand-file-name ("/sshfs:localhost:/sys/" nil))
  tramp-autoload-file-name-handler(expand-file-name "/sshfs:localhost:/sys/" 
nil)
  directory-files("/sshfs:localhost:/sys/")
  (print (directory-files "/sshfs:localhost:/sys/"))
  eval((print (directory-files "/sshfs:localhost:/sys/")) t)
  command-line-1(("-eval" "(print (directory-files 
\"/sshfs:localhost:/sys/\"))"))
  command-line()
  normal-top-level()

This can be fixed by first loading tramp-sshfs and the loading tramp
(any other combination doesn't seem to work):

$ emacs -Q -batch -l tramp-sshfs -l tramp -eval '(print (directory-files 
"/sshfs:localhost:/sys/"))'

("." ".." "block" "bus" "class" "dev" "devices" "firmware" "fs" "hypervisor" 
"kernel" "module" "power")

But it would be great if this could just work out of the box.


In GNU Emacs 28.0.91 (build 6, x86_64-pc-linux-gnu, GTK+ Version 3.24.30, cairo 
version 1.16.0)
 of 2022-01-15
Repository revision: 7f36aca99dc1387cfeb599c9f2bb781036f79cf1
Repository branch: emacs-28
Windowing system distributor 'The X.Org Foundation', version 11.0.12013000
System Description: Debian GNU/Linux rodete

Configured using:
 'configure --enable-gcc-warnings=warn-only
 --enable-gtk-deprecation-warnings --without-pop --with-mailutils
 --enable-checking=all --enable-check-lisp-object-type --with-modules
 'CFLAGS=-O0 -ggdb3''

Configured features:
CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG JSON
LIBSELINUX LIBSYSTEMD LIBXML2 MODULES NOTIFY INOTIFY PDUMPER PNG SECCOMP
SOUND THREADS TIFF TOOLKIT_SCROLL_BARS X11 XDBE XIM XPM GTK3 ZLIB

Important settings:
  value of $LC_TIME: en_DK.utf8
  value of $LANG: en_US.utf8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-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
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug sendmail phst skeleton edmacro kmacro
pcase ffap thingatpt url url-proxy url-privacy url-expand url-methods
url-history url-cookie url-domsuf url-util url-parse url-vars mailcap rx
message rmc dired dired-loaddefs rfc822 mml mml-sec epa derived epg
rfc6068 epg-config gnus-util rmail rmail-loaddefs auth-source cl-seq
eieio eieio-core cl-macs eieio-loaddefs password-cache json map
time-date mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047
rfc2045 mm-util ietf-drums mail-prsvr mailabbrev mail-utils gmm-utils
mailheader gnutls puny elp dbus xml subr-x seq byte-opt gv bytecomp
byte-compile cconv compile text-property-search comint ansi-color ring
cl-loaddefs cl-lib iso-transl tooltip eldoc paren 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
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 69550 6086)
 (symbols 48 8543 3)
 (strings 32 24825 2455)
 (string-bytes 1 802037)
 (vectors 16 15668)
 (vector-slots 8 207469 19668)
 (floats 8 29 46)
 (intervals 56 228 0)
 (buffers 992 11))

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