emacs-math-preview: add math-preview dependency?

Hi, the package emacs-math-preview requires nodejs package math-preview to be installed, in order to work. Would it be possible Somebody™ could create a package for that and add it as an explicit dependency for emacs-math-preview?

I know nothing about nodejs and am having trouble figuring out how to install math-preview myself on Guix. The README.md instructions in emacs-math-preview state:

However, if I do this, I get this error:

```

christopher@theoden ~$ npm install -g git+https://gitlab.com/matsievskiysv/math-preview

npm ERR! code ENOENT

npm ERR! syscall mkdir

npm ERR! path /gnu/store/lknvzfbwqffvvyflid5dpm53vbjg8kh4-node-18.19.0/lib/node_modules/math-preview

npm ERR! errno -2

npm ERR! enoent ENOENT: no such file or directory, mkdir '/gnu/store/lknvzfbwqffvvyflid5dpm53vbjg8kh4-node-18.19.0/lib/node_modules/math-preview'

npm ERR! enoent This is related to npm not being able to find a file.

npm ERR! enoent

npm ERR! A complete log of this run can be found in: /home/christopher/.npm/_logs/2025-01-02T18_16_26_364Z-debug-0.log

```

Evidently, I need to somehow pick a different path or something like that. If somebody could at least document the correct installation steps here, that would be helpful.

--

? Christopher Howard

? gemini://gem.librehacker.com

? http://gem.librehacker.com

?????? ??? ????? ?? ????? ??? ????

Hi, normally nodejs packages are hard to import, since they have

tons of dependencies, just like crates for rust, while crates are

maintained in Guix and npm packages are not.

When I need nodejs package to be available for emacs, I once

install it globally:

guix shell node -- npm install -g

git+https://gitlab.com/matsievskiysv/math-preview

Then next time I need an instance of emacs with it, I would run:

guix shell node -- emacs

Beware, that if you run emacs without node available, math-preview

would not be available as well.

If you normally don't have any thing complex to do with node (like

having multiple nodejs versions, environments etc.), you may add

it to your profile.

Christopher Howard <christopher@librehacker.com> writes:

muradm <mail@muradm.net> writes:

Does this command actually work for you? When I try, I get this error

```

90 verbose stack Error: ENOENT: no such file or directory, mkdir '/gnu/store/lknvzfbwqffvvyflid5dpm53vbjg8kh4-node-18.19.0/lib/node_modules/math-preview'

```

Do you have some necessary node configuration set up which I don't?

--

Christopher Howard

Ah.. you also need to configure NPM. Mine is set as following:

mkdir -p ~/.config/npm

mkdir -p ~/.local/share/npm

echo "prefix=/home/muradm/.local/share/npm" > ~/.config/npm/config

Then you can use "npm install -g ...".

Christopher Howard <christopher@librehacker.com> writes:

muradm <mail@muradm.net> writes:

Okay, thank you. Before reading this, I chatted with somebody on #node.js and they suggested "npm set prefix". I set my install prefix that way, and then I was able to run the install command with no issues. Now math-preview functions are working in my Emacs buffers.

So, I'm up and running. But I'd be inclined to keep this bug open, in case it might inspire someone to put together a package for that math-preview dependency.

--

Christopher Howard