bug#30533: 26.0.60; (copy-file) over TRAMP FTP mistakes file for directory

[Christian Johansson]

I have a case where Emacs have trouble understanding whether a remote
file is a file or a directory, I run this code where PATH-LOCAL is on
localhost and PATH-REMOTE is on a remote FTP via TRAMP

(let ((file-or-directory (not (file-directory-p path-remote))))
    (if file-or-directory
        (progn
          (message "Downloading file '%s' to '%s'.. (synchronously)" 
path-remote path-local)
          (copy-file path-remote path-local t t t t)
          (message "Download of file '%s' finished. (synchronously)" 
path-local))
      (progn
        (message "Downloading directory '%s' to '%s'.. (synchronously)" 
path-remote path-local)
        (copy-directory path-remote path-local t t t)
        (message "Download of directory '%s' finished. (synchronously)"
    path-local))))

The file .error-log will be transferred locally to .error-log/.error-log
instead of .error-log. The filename does not matter.

It seems (file-regular-p) mistakes remote files over TRAMP FTP more
often than (file-directory-p). Maybe that is the cause of this problem.



In GNU Emacs 26.0.60 (build 13, x86_64-apple-darwin17.3.0, NS appkit-1561.20 
Version 10.13.2 (Build 17C205))
 of 2018-02-19 built on Christians-iMac
Repository revision: 020734c0e1a7ed8534df29992ffc4228d3663d89
Windowing system distributor 'Apple', version 10.3.1561
Recent messages:
Getting /ftp:ftpuser@ftphost:/remotepath/style.css...done
Getting /ftp:ftpuser@ftphost:/remotepath/travel-tips.php...done
Differences calculated between directory ’/localpath/’ and 
’/ftp:ftpuser@ftphost:/remotepath/’ -> 0 only in A, 2 only in B, 0 differs. 
(synchronously)
previous-line: Beginning of buffer [6 times]
Downloading file ’/ftp:ftpuser@ftphost:/remotepath/.error-log’ to 
’/localpath/.error-log’.. (synchronously)
> ftp:ftpuser@ftphost:/remotepath/.error-log to /localpath/.error-log/...
> p:ftpuser@ftphost:/remotepath/.error-log to /localpath/.error-log/...5k
> :ftpuser@ftphost:/remotepath/.error-log to /localpath/.error-log/...21k
> ftpuser@ftphost:/remotepath/.error-log to /localpath/.error-log/...done
Download of file ’/localpath/.error-log’ finished. (synchronously)
Quit [2 times]
Configured features:
JPEG RSVG NOTIFY ACL GNUTLS LIBXML2 ZLIB TOOLKIT_SCROLL_BARS NS LCMS2

Important settings:
  value of $LANG: sv_SE.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Messages

Minor modes in effect:
  show-paren-mode: t
  save-place-mode: t
  helm-mode: t
  helm-autoresize-mode: t
  global-flycheck-mode: t
  global-hl-todo-mode: t
  global-diff-hl-mode: t
  diff-auto-refine-mode: t
  global-auto-complete-mode: t
  dired-async-mode: t
  editorconfig-mode: t
  yas-global-mode: t
  yas-minor-mode: t
  override-global-mode: t
  ido-everywhere: t
  display-time-mode: t
  winner-mode: t
  electric-pair-mode: t
  desktop-save-mode: t
  global-semantic-mru-bookmark-mode: t
  global-semanticdb-minor-mode: t
  global-semantic-idle-completions-mode: t
  global-semantic-idle-scheduler-mode: t
  global-semantic-idle-local-symbol-highlight-mode: t
  global-semantic-idle-summary-mode: t
  global-semantic-decoration-mode: t
  global-semantic-highlight-func-mode: t
  global-semantic-stickyfunc-mode: t
  semantic-mode: t
  global-ede-mode: t
  delete-selection-mode: t
  global-whitespace-mode: t
  which-function-mode: t
  shell-dirtrack-mode: t
  cl-old-struct-compat-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
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
/Users/christianjohansson/.emacs.d/ssh-deploy/ssh-deploy hides 
/Users/christianjohansson/.emacs.d/elpa/ssh-deploy-20180218.704/ssh-deploy
/Users/christianjohansson/.emacs.d/ssh-deploy/ssh-deploy-diff-mode hides 
/Users/christianjohansson/.emacs.d/elpa/ssh-deploy-20180218.704/ssh-deploy-diff-mode
/Users/christianjohansson/.emacs.d/elpa/less-css-mode-20160930.2153/less-css-mode
 hides /Users/christianjohansson/Documents/remacs/lisp/textmodes/less-css-mode

Features:
(shadow sort mail-extr ediff-merg ediff-wind ediff-diff ediff-mult
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mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr
mail-utils helm-command helm-elisp helm-eval edebug helm-info
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flycheck-color-mode-line face-remap auto-package-update ts-comint tss
log4e json-mode json-reformat json-snatcher smartparens-javascript js
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url-domsuf url-util mailcap json map lorem-ipsum company
smartparens-config smartparens-text smartparens thingatpt paredit
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pcase cl bind-key easy-mmode ido time winner edmacro kmacro elec-pair
desktop frameset semantic/mru-bookmark semantic/db-mode semantic/db
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ede/base ede/auto ede/source eieio-base eieio-speedbar speedbar sb-image
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which-func imenu windmove base16-dracula-theme base16-theme tramp
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ring parse-time format-spec advice cus-start cus-load finder-inf rx info
package easymenu epg-config url-handlers url-parse auth-source cl-seq
eieio eieio-core cl-macs eieio-loaddefs password-cache url-vars seq
byte-opt gv bytecomp byte-compile cconv cl-loaddefs cl-lib time-date
tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type
mwheel term/ns-win ns-win ucs-normalize mule-util term/common-win
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newcomment text-mode elisp-mode lisp-mode prog-mode register page
menu-bar rfn-eshadow isearch timer select scroll-bar mouse jit-lock
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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 charscript charprop
case-table epa-hook jka-cmpr-hook help simple abbrev obarray minibuffer
cl-preloaded nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote kqueue cocoa ns lcms2
multi-tty make-network-process emacs)

Memory information:
((conses 16 601023 38540)
 (symbols 48 54999 49)
 (miscs 40 1120 809)
 (strings 32 146615 15732)
 (string-bytes 1 4761875)
 (vectors 16 82947)
 (vector-slots 8 1371207 5634)
 (floats 8 426 907)
 (intervals 56 1355 232)
 (buffers 992 24))