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I have

(setq TeX-auto-local "subdir")
(setq TeX-macro-private '("dir/"))

I want to set TeX-auto-private to dir/subdir by joining TeX-auto-local and TeX-macro-private together. I thought it was easy but I can't find a way.

Drew
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Arch Stanton
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1 Answers1

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For the stated examples, simply concatenating the two strings can be done like so:

(setq TeX-auto-private (concat (car TeX-macro-private)
                               TeX-auto-local))
=> "dir/subdir"

However it looks to me as if TeX-auto-private also needs to be a list, rather than a string?

TeX-auto-private is a variable defined in ‘tex.el’.
Its value is ("/tmp/emacs-sandbox.ollfrTriav/HOME/.emacs.d/auctex/auto")

Documentation:
List of directories containing automatically generated AUCTeX style files.

These correspond to the personal TeX macros.

So perhaps you actually want this?

(push (concat (car TeX-macro-private) TeX-auto-local)
      TeX-auto-private)

Or, if you wish to clobber any existing list elements:

(setq TeX-auto-private (list (concat (car TeX-macro-private)
                                     TeX-auto-local)))
phils
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  • I don't understand your questions, excuse my ignorance. What do you mean with "initial values", the value the variable had before I set it? And regarding the second variable, I forgot where I first saw it set as a list element, but since it is where AUCTeX looks for private .sty files, it makes sense that it is a list that may be expanded – Arch Stanton Sep 05 '17 at 14:05
  • Never mind. I was a bit confused as to why one of the values was a list in the first place, but I've taken a look at tex.el now and can that it's expected to be so. However it looks like TeX-auto-private should also be a list, so I'll update the answer... – phils Sep 05 '17 at 22:23
  • I've found easier things in Emacs than setting up AUCTeX... I've tried your piece of code with push and I get an error: concat: Symbol's value as variable is void: TeX-macro-private [edit]: that's the error I got by evaluating the code in Emacs -Q. If I put the code in my init.el I get Symbol's value as variable is void: TeX-auto-private – Arch Stanton Sep 06 '17 at 08:37
  • If I put the code inside (with-eval-after-load "latex" ...) it doesn't give errors, but it does not load the auxiliary files, too. – Arch Stanton Sep 06 '17 at 09:21
  • ...which is ideal, yes? – phils Sep 06 '17 at 10:38
  • Nope. I can't quite understand what's happening here. TeX-auto-private contains the path AUCTeX searches for auxiliary files that, basically, I use for the autocompletion of my LaTeX macros. When I set TeX-auto-private within (with-eval-after-load ...), C-h v TeX-auto-private shows that the variable contains the right path, but in practice I doesn't autocomplete my commands. Anyhow, I appreciated your help. With your solution AUCTeX works just right, even if it isn't optimal, perhaps. – Arch Stanton Sep 06 '17 at 10:53
  • You could try using "tex" (being the specific library which defines those vars) rather than "latex". You could alternatively try forcibly loading the libraries with require before setting those variables, instead of using the deferred configuration (the latter would usually be preferable, but I don't know what the other issue is caused by, so this would be worth testing at least). – phils Sep 06 '17 at 11:52
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    I think the issue is related with TeX-style-path, see AUCTeX isn't loading local per-package style files, is ignoring TeX-auto-local – Arch Stanton Sep 06 '17 at 13:07