GNU bug report logs - #19839
24.4; ffap does not detect file paths with curly braced shell variables

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Kaushal <kaushal.modi <at> gmail.com>
Subject: bug#19839: closed (Re: bug#19839: 24.4; ffap does not detect file
 paths with curly braced shell variables)
Date: Wed, 08 Apr 2015 00:23:02 +0000

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Your bug report

#19839: 24.4; ffap does not detect file paths with curly braced shell variables

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 19839 <at> debbugs.gnu.org.

-- 
19839: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=19839
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Kaushal <kaushal.modi <at> gmail.com>, 19839-done <at> debbugs.gnu.org
Subject: Re: bug#19839: 24.4; ffap does not detect file paths with
 curly braced shell variables
Date: Wed, 08 Apr 2015 03:22:09 +0300

On 04/07/2015 05:26 AM, Kaushal wrote:
> I was able to recreate this consistently in master branch.

Ok, me too.

> Also I noticed that no error is thrown any more (it probably changed
> 24.4 onwards) but ffap still does not work over paths with curly braces.
> My fix fixes that.

Previously, I stopped looking after seeing no error. Didn't actually 
expect that the expansion works.

>               '(file "--:\\\\$\\{\\}+<>@-Z_[:alpha:]~*?" "<@" "@>;.,!:"))

Thank you, the suggested change in now on master.

> Let me know if you also can repeat these steps.

Seems to work now.

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From: Kaushal <kaushal.modi <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.4;
 ffap does not detect file paths with curly braced shell variables
Date: Wed, 11 Feb 2015 14:23:14 -0500

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Hi,

The ffap gives an error if I try to do =C-x C-f= while the path is on a
path containing curly braces wrapped shell variable.

e.g. ${PRJ_HOME}/dir1/file1.el

I traced the problem to the ffap-string-at-point-mode-alist variable in
lisp/ffap.el.

The fix is to replace

    (file "--:\\\\$+<>@-Z_[:alpha:]~*?" "<@" "@>;.,!:") ; broken

with

    (file "--:\\\\$\\{\\}+<>@-Z_[:alpha:]~*?" "<@" "@>;.,!:") ; fixed


I added "\\{\\}" to the regexp for 'file'.

---

*Original* lisp/ffap.el in emacs 24.4

(defvar ffap-string-at-point-mode-alist
  '(
    ;; The default, used when the `major-mode' is not found.
    ;; Slightly controversial decisions:
    ;; * strip trailing "@" and ":"
    ;; * no commas (good for latex)
    (file "--:\\\\$+<>@-Z_[:alpha:]~*?" "<@" "@>;.,!:")
    ;; An url, or maybe a email/news message-id:
    (url "--:=&?$+@-Z_[:alpha:]~#,%;*()!'" "^[0-9a-zA-Z]" ":;.,!?")
    ;; Find a string that does *not* contain a colon:
    (nocolon "--9$+<>@-Z_[:alpha:]~" "<@" "@>;.,!?")
    ;; A machine:
    (machine "-[:alnum:]." "" ".")
    ;; Mathematica paths: allow backquotes
    (math-mode ",-:$+<>@-Z_[:lower:]~`" "<" "@>;.,!?`:")
    )


In GNU Emacs 24.4.2 (x86_64-unknown-linux-gnu, GTK+ Version 2.10.4)
 of 2015-01-29 on ulcf20.cld.MYCOMPANY.com
Windowing system distributor `The X.Org Foundation', version 11.0.60900000
System Description: Red Hat Enterprise Linux Client release 5.10 (Tikanga)

Configured using:
 `configure --prefix=/home/kmodi/usr_local/apps/emacs/24.4
 CPPFLAGS=-fgnu89-inline'

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

Major mode: Emacs-Lisp



--
Kaushal Modi

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