From: Kyle Meyer <kyle@kyleam.com>
To: Maxim Nikulin <manikulin@gmail.com>
Cc: emacs-orgmode@gnu.org
Subject: Re: greedy substitution in org-open-file
Date: Fri, 12 Feb 2021 02:16:40 -0500 [thread overview]
Message-ID: <874kih92nb.fsf@kyleam.com> (raw)
In-Reply-To: <ru9ki4$t5e$1@ciao.gmane.io>
Maxim Nikulin writes:
> Looking into the code related to 'pty problem with
> start-process-shell-command, I have realized that the following case is
> not handled correctly:
>
> #+begin_src elisp
> (setq org-file-apps '(("\\.pdf::\\([0-9]+\\)\\'" . "xpdf %s %1")))
> #+end_src
Not relevant for the underlying issue, but doesn't xpdf require a colon
before the page number (i.e. ":%1")?
> I hope, I adapted an example from [[help:org-file-apps]] correctly. When
> I try to open the following link using C-c C-o
>
> [[file:test-%1f.pdf::42]]
>
> I get
>
> Running xpdf /home/ubuntu/examples/org/test-\42f.pdf 42...done
>
> I believe, it should be
>
> Running xpdf /home/ubuntu/examples/org/test-%1f.pdf 42...done
>
> Or
>
> Running xpdf /home/ubuntu/examples/org/test-\%1f.pdf 42...done
Yep, it should show up as "Running xpdf /tmp/test-\%1f.pdf :42...done",
with the backslash coming from shell-quote-argument.
> The source of the problem is that %s substitution is expanded at first
> and regexp groups are replaced later. Ideally, it should be performed in
> a single pass. I have found format-spec function but I am unsure
> concerning it, maybe it is avoided intentionally.
I believe format-spec requires the placeholder to be A-z:
(format-spec "xpdf %s" '((?s . "a"))) => "xpdf a"
(format-spec "xpdf %s %1" '((?s . "a") (?1 . "b"))) ;; Invalid format string
What about flipping the processing, handling the %N placeholders first
and then formatting the file name? Seems to work on my end, though I
haven't tested it thoroughly.
diff --git a/lisp/org.el b/lisp/org.el
index c61b8fb56..31dbe352a 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -8714,12 +8714,6 @@ (defun org-open-file (path &optional in-emacs line search)
;; Remove quotes around the file name - we'll use shell-quote-argument.
(while (string-match "['\"]%s['\"]" cmd)
(setq cmd (replace-match "%s" t t cmd)))
- (setq cmd (replace-regexp-in-string
- "%s"
- (shell-quote-argument (convert-standard-filename file))
- cmd
- nil t))
-
;; Replace "%1", "%2" etc. in command with group matches from regex
(save-match-data
(let ((match-index 1)
@@ -8731,7 +8725,11 @@ (defun org-open-file (path &optional in-emacs line search)
(while (string-match regex cmd)
(setq cmd (replace-match replace-with t t cmd))))
(setq match-index (+ match-index 1)))))
-
+ (setq cmd (replace-regexp-in-string
+ "%s"
+ (shell-quote-argument (convert-standard-filename file))
+ cmd
+ nil t))
(save-window-excursion
(message "Running %s...done" cmd)
(start-process-shell-command cmd nil cmd)
next prev parent reply other threads:[~2021-02-12 7:17 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-20 16:08 Maxim Nikulin
2021-02-12 7:16 ` Kyle Meyer [this message]
2021-02-12 16:46 ` Maxim Nikulin
2021-02-13 4:38 ` Kyle Meyer
2021-02-15 17:04 ` Maxim Nikulin
2021-03-03 12:47 ` Maxim Nikulin
2021-03-21 12:36 ` Maxim Nikulin
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