GNU bug report logs - #19589
11.88; the `$' in environment variables triggers math mode syntax highlighting

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: "Blake C. Rawlings" <brawling <at> andrew.cmu.edu>
To: bug-auctex <at> gnu.org
Subject: 11.88; the `$' in environment variables triggers math mode syntax
 highlighting
Date: Tue, 13 Jan 2015 15:45:52 -0500

When I use environment variables (such as $HOME) in a .tex file, the $
triggers math mode syntax highlighting.  The result is that the rest
of the buffer, until the next $, is highlighted as if it were in math
mode.  Some examples:

\includegraphics{$HOME/path/to/graphic}

\bibliography{$HOME/path/to/bib1,$HOME/path/to/bib2}


I currently use the following hack to get around this behavior:

\bibliography{%
  $HOME/path/to/bib1,%$
  $HOME/path/to/bib2,%$
}

where the second $ on each line "closes" the math mode for
syntax-highlighting purposes, so at least the rest of the buffer is not
affected.

Blake
------------------------------------------------------------------------



Emacs  : GNU Emacs 24.4.1 (x86_64-pc-linux-gnu, GTK+ Version 3.14.5)
 of 2014-12-09 on gaia, modified by Debian
Package: 11.88

current state:
==============
(setq
 AUCTeX-date "2014-10-29"
 window-system 'x
 LaTeX-version "2e"
 TeX-style-path '("~/.emacs.d/auctex"
		  "/home/blake/.emacs.d/elpa/auctex-11.88/style"
		  "/home/blake/.emacs.d/auctex/auto"
		  "/home/blake/.emacs.d/auctex/style" "auto" "style")
 TeX-auto-save nil
 TeX-parse-self nil
 TeX-master t
 TeX-command-list '(("TeX"
		     "%(PDF)%(tex) %(extraopts) %`%S%(PDFout)%(mode)%' %t"
		     TeX-run-TeX nil
		     (plain-tex-mode ams-tex-mode texinfo-mode) :help
		     "Run plain TeX")
		    ("LaTeX" "%`%l%(mode)%' %t" TeX-run-TeX nil
		     (latex-mode doctex-mode) :help "Run LaTeX")
		    ("Makeinfo" "makeinfo %(extraopts) %t" TeX-run-compile nil
		     (texinfo-mode) :help "Run Makeinfo with Info output")
		    ("Makeinfo HTML" "makeinfo %(extraopts) --html %t"
		     TeX-run-compile nil (texinfo-mode) :help
		     "Run Makeinfo with HTML output")
		    ("AmSTeX"
		     "%(PDF)amstex %(extraopts) %`%S%(PDFout)%(mode)%' %t"
		     TeX-run-TeX nil (ams-tex-mode) :help "Run AMSTeX")
		    ("ConTeXt"
		     "texexec --once --texutil %(extraopts) %(execopts)%t"
		     TeX-run-TeX nil (context-mode) :help "Run ConTeXt once")
		    ("ConTeXt Full" "texexec %(extraopts) %(execopts)%t"
		     TeX-run-TeX nil (context-mode) :help
		     "Run ConTeXt until completion")
		    ("BibTeX" "bibtex %s" TeX-run-BibTeX nil t :help
		     "Run BibTeX")
		    ("Biber" "biber %s" TeX-run-Biber nil t :help "Run Biber")
		    ("View" "%V" TeX-run-discard-or-function t t :help
		     "Run Viewer")
		    ("Print" "%p" TeX-run-command t t :help "Print the file")
		    ("Queue" "%q" TeX-run-background nil t :help
		     "View the printer queue" :visible TeX-queue-command)
		    ("File" "%(o?)dvips %d -o %f " TeX-run-command t t :help
		     "Generate PostScript file")
		    ("Index" "makeindex %s" TeX-run-command nil t :help
		     "Create index file")
		    ("Xindy" "texindy %s" TeX-run-command nil t :help
		     "Run xindy to create index file")
		    ("Check" "lacheck %s" TeX-run-compile nil (latex-mode)
		     :help "Check LaTeX file for correctness")
		    ("ChkTeX" "chktex -v6 %s" TeX-run-compile nil (latex-mode)
		     :help "Check LaTeX file for common mistakes")
		    ("Spell" "(TeX-ispell-document \"\")" TeX-run-function nil
		     t :help "Spell-check the document")
		    ("Clean" "TeX-clean" TeX-run-function nil t :help
		     "Delete generated intermediate files")
		    ("Clean All" "(TeX-clean t)" TeX-run-function nil t :help
		     "Delete generated intermediate and output files")
		    ("Other" "" TeX-run-command t t :help
		     "Run an arbitrary command")
		    )
 )

Message #12 received at 19589 <at> debbugs.gnu.org (full text, mbox):

From: Arash Esbati <arash <at> gnu.org>
To: "Blake C. Rawlings" <brawling <at> andrew.cmu.edu>
Cc: 19589 <at> debbugs.gnu.org
Subject: Re: bug#19589: 11.88; the `$' in environment variables triggers
 math mode syntax highlighting
Date: Sun, 03 Mar 2024 15:36:54 +0100

"Blake C. Rawlings" <brawling <at> andrew.cmu.edu> writes:

> When I use environment variables (such as $HOME) in a .tex file, the $
> triggers math mode syntax highlighting.  The result is that the rest
> of the buffer, until the next $, is highlighted as if it were in math
> mode.  Some examples:
>
> \includegraphics{$HOME/path/to/graphic}
>
> \bibliography{$HOME/path/to/bib1,$HOME/path/to/bib2}
>
>
> I currently use the following hack to get around this behavior:
>
> \bibliography{%
>   $HOME/path/to/bib1,%$
>   $HOME/path/to/bib2,%$
> }
>
> where the second $ on each line "closes" the math mode for
> syntax-highlighting purposes, so at least the rest of the buffer is not
> affected.

(I'm going through old bug reports that unfortunately weren't resolved
at the time.  And my apologies if you get this message twice.)

I don't think this is a bug.  AUCTeX doesn't handle the arguments of
\includgraphics or \bibliography as verbatim text, in contrast to
\verb|$HOME/path/to/graphic|.  So AUCTeX provides the %$ trick at the
end of line as a solution for your use case.

Therefore I'm closing this report.

Best, Arash

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