Reliable way to get package installation location

[mtrajano]

In order to set up the node-debug2 adapter you need to pass the path to the nodeDebug.js script which lives in the node-debug2-adapter package folder. I want to do this in a way that uses the configured installation root path. The way I'm doing this now is using require('mason-core.path').package_prefix('node-debug2-adapter') .. '/out/src/nodeDebug.js' but this feels like something internal to mason, not sure if I can rely on this. Another way would be to access the "currently set configuration", something like require('mason.settings').current.install_root_dir .. '/packages/node-debug2-adapter/out/src/nodeDebug.js, which also doesn't feel great since I'm accessing specific properties that are subject to change. That current property also feels internal to mason and the config structure is subject to change. Just wanted to get your thoughts on this, thanks!

[williamboman]

Hey! So the best way to gather the installation location of a package is via Package:get_install_path(). However, as you mention, you shouldn't really be reaching into packages directly as this is prone to errors. The node-debug2-adapter package will link an executable with the same name, for easy access. If you're using nvim-dap, try something like:

dap.adapters.node2 = {
  type = 'executable',
  command = 'node-debug2-adapter',
  args = {},
}

[mtrajano]

Thanks really handy to know thanks!