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* lisp/ffap.el (ffap-read-file-or-url): Don't use url-file-handler

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Simplify accordingly (and don't call substitute-in-file-name redundantly).
This commit is contained in:
Stefan Monnier 2019-11-09 13:32:20 -05:00
parent 027f218ad2
commit 8685db187b
1 changed files with 12 additions and 27 deletions
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39
lisp/ffap.el
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@ -1405,34 +1405,19 @@ which may actually result in an URL rather than a filename."
(or guess (setq guess default-directory))
;; Tricky: guess may have or be a local directory, like "w3/w3.elc"
;; or "w3/" or "../el/ffap.el" or "../../../"
(unless (or (ffap-url-p guess)
(ffap-file-remote-p guess))
(setq guess
(abbreviate-file-name (expand-file-name guess))))
(if (and (ffap-url-p guess)
;; Exclude non-filename-like URLs like "mailto:..."
(not (string-match "\\`[a-z]+://" guess)))
(if (ffap-url-p guess)
;; FIXME: We earlier tried to make use of `url-file-handler' so
;; `read-file-name' could also be used for URLs, but it
;; introduced all kinds of subtle breakage such as:
;; - (file-name-directory "http://a") returning "http://a/"
;; - Trying to contact remote hosts with no justification
;; These should be fixed in url-handler-mode before we can try
;; using it here again.
(read-string prompt guess nil nil t)
(let ((fnh-elem (cons ffap-url-regexp #'url-file-handler)))
;; Explain to `rfn-eshadow' that we can use URLs here.
(push fnh-elem file-name-handler-alist)
(unwind-protect
(let* ((dir (file-name-directory guess))
;; FIXME: If `guess' is "http://a" url-handler
;; somehow returns "https://a/" for the directory and
;; "a" for the non-directory!
(broken-dir (> (length dir) (length guess))))
(setq guess
(read-file-name prompt (if broken-dir guess dir) nil nil
(unless broken-dir
(file-name-nondirectory guess)))))
;; Remove the special handler manually. We used to just let-bind
;; file-name-handler-alist to preserve its value, but that caused
;; other modifications to be lost (e.g. when Tramp gets loaded
;; during the completing-read call).
(setq file-name-handler-alist (delq fnh-elem file-name-handler-alist))))
(or (ffap-url-p guess)
(substitute-in-file-name guess))))
(unless (ffap-file-remote-p guess)
(setq guess (abbreviate-file-name (expand-file-name guess))))
(read-file-name prompt (file-name-directory guess) nil nil
(file-name-nondirectory guess))))
;; The rest of this page is just to work with package complete.el.
;; This code assumes that you load ffap.el after complete.el.