Re: where Babel looks for binaries?

[Steven Arntson <steven@stevenarntson.com>]

Thorsten Jolitz <tjolitz@gmail.com> writes:

> Steven Arntson <steven@stevenarntson.com> writes:
>
>> I'm using org-babel to enter lilypond code for music typesetting. I had
>> an old version of lilypond from the Ubuntu repos installed in
>> /usr/bin. This worked, but the version was getting old. I installed the
>> latest stable version from the lilypond.org website, and it ended up in
>> /usr/local. I removed (apt-get remove) the repo version. Now when I do
>> ly-tangle, I get:
>>
>> ly-compile-lilyfile: Searching for program: no such file or directory,
>> /usr/bin/lilypond
>>
>> I tried to "customize-variable" on "ly-compile-lilyfile" but there's
>> no match.
>>
>> How do I change where org looks for this program?
>
> Maybe
>
> ,----[ C-h v ly-nix-ly-path RET ]
> | ly-nix-ly-path is a variable defined in `ob-lilypond.el'.
> | Its value is "/usr/bin/lilypond"
> | 
> | Documentation:
> | Not documented as a variable.
> | 
> | [back]
> `----
>
> ?

I changed ly-nix-ly-path in ob-lilypond.el to "/usr/local/lilypond". I
restarted emacs, ran "ly-tangle" and again got the message of "no such
file or directory, /usr/bin/lilypond." But my change is still there in
the file, so it must be looking somewhere else, too?

I also wonder: is it a good idea for me to be meddling in a file like
"ob-lilypond"? Will any changes I make be reverted when I get an update
from the emacs package manager?

I am a beginner here, so thank you for your help!
-steven