Trying to write a vuepress plugin - plugins

Question

(The doc on writing a plugin is pretty sparse...)
THE GOAL
Create a plugin to add headers to a page.
THE ATTEMPT
Created a plugin following guidelines and an example plugin (that presumably works...) to do something similar.
THE ISSUE
Plugin won't load.
config.js
plugins: [
[
'vuepress-plugin-headertags',
{ headerTags: ["<script src='https://cdn.jsdelivr.net/npm/netlify-identity-widget#1.5.2/build/netlify-identity-widget.min.js'></script>"]}
]
],
(the <script> tag is what I'm trying to insert, in this instance.
PLUGIN index.js
const { path } = require('path')
// was: const { path } = require('#vuepress/shared-utils')
// dunno. No documentation on this...
// got the current version from the 'default-theme' code
module.exports = (options) => ({
define () {
return {
headerTags: options.headerTags || []
}
},
enhanceAppFiles () {
return [path.resolve(__dirname, 'enhanceAppFile.js')]
},
globalUIComponents: ['HeaderTags']
})
PLUGIN INSTALLATION
I published it to npm as vuepress-plugin-headertags, and then installed it with:
yarn add -D vuepress-plugin-headertags
Here's the relevant package.json content:
{
"name": "vuepress-netlifycms",
"version": "0.0.0",
"scripts": {
"dev": "vuepress dev",
"build": "vuepress build",
"debug": "node --nolazy --inspect=9229 /home/rickb/.yarn/bin/vuepress build"
},
"devDependencies": {
"vuepress": "^0.14.8",
"vuepress-plugin-headertags": "^1.0.3"
},
"dependencies": {}
}
VUEPRESS INSTALLATION
I cloned the vuepress repo from git and did a yarn link, which makes it globally available. With that, I can trace it in the debugger via the 'debug' script.
TRACING
I've followed the VP source code in the debugger and get to resolvePathPackage() in moduleResolver.js. The incoming path is not correct:
/home/(...)/VuePress-NetlifyCMS/vuepress-plugin-headertags
It should be:
/home/(...)/VuePress-NetlifyCMS/node_modules/vuepress-plugin-headertags
At any rate, it doesn't resolve, even after the 'normalization' process.
MORE EYES
I need more eyes on this to help me figure it out. The project is already up on github as 'rickbsgu/VuePress-NetlifyCMS.git'. If you do an install, the plugin will be in the project directory under 'node_modules/vuepress-plugin-headertags'
Any thoughts appreciated

Answer 1

And it works, now. Two problems:
Version I was running/debugging was not the same as the version in package.json. There is the vuepress executable and the vuepress libraries the plugin requires. The library was always the older version at runtime.
I needed to change the path import in index.html from const { path } = require('path') to const { path } = require('#vuepress/shared-utils'). That's my doc issue - I don't see that documented anywhere.
Thanks #Sun Haoran for getting me to look in the right place.