emacs-orgmode@gnu.org archives
 help / color / mirror / code / Atom feed
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
 	(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))
 	(message "Running %s...done" cmd)
 	(start-process-shell-command cmd nil cmd)

  reply	other threads:[~2021-02-12  7:17 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-20 16:08 greedy substitution in org-open-file 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
2022-08-27 17:20         ` [PATCH] org.el: Fix percent substitutions in `org-open-file' Max Nikulin
2022-09-02 12:08           ` Ihor Radchenko
2022-09-02 15:41             ` Max Nikulin
2022-09-03  8:26               ` Ihor Radchenko
2022-09-04 12:16                 ` [PATCH v2] " Max Nikulin
2022-09-05  5:46                   ` Ihor Radchenko

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

  List information: https://www.orgmode.org/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=874kih92nb.fsf@kyleam.com \
    --to=kyle@kyleam.com \
    --cc=emacs-orgmode@gnu.org \
    --cc=manikulin@gmail.com \


* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox


This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).