Unable to run prebuild events before libman restore triggers

[ItsKaleb]

Describe the bug

I am attempting to use Libman.Build to copy certain components of client side libraries when building my application.
I am unable to use any of the providers available as I need to pull the Node modules from a Nexus Package Repository.
I was hoping to use npm to install the required packages to the node_modules folder and then allow libman to use the filesystem provider to pull the required files from the node_modules folder.
I have set a prebuild event in my project's settings to run 'npm install'. However, it appears as though libman is attempting to run before the install, meaning that the node_modules folder does not exist when it attempts to pull the files specified.

Should libman be running at a later stage in the build process such that prebuild events are able to complete first?
If not, please advise on an alternative solution for what I am trying to accomplish.

To Reproduce

Microsoft.Web.LibraryManager.Build version 2.1.113
package.json:
{
"name": "MyBlazorApplication",
"version": "1.0.0",
"private": true,
"devDependencies": {},
"dependencies": {
"font-awesome": "^4.7.0"
}
}

libman.json:
{
"version": "1.0",
"defaultProvider": "filesystem",
"defaultDestination": "wwwroot/lib",
"libraries": [
{
"library": "node_modules/font-awesome/",
"destination": "wwwroot/lib/font-awesome",
"files": [
"css/font-awesome.min.css",
"fonts/fontawesome-webfont.eot",
"fonts/fontawesome-webfont.svg",
"fonts/fontawesome-webfont.ttf",
"fonts/fontawesome-webfont.woff",
"fonts/fontawesome-webfont.woff2",
"fonts/FontAwesome.otf"
]
},
]
}

Pre-build event command line:
npm install

Expected behavior

I expect the prebuild event to run 'npm install', the dependencies specified in package.json are installed to the node_modules file, and then libman triggers it's build to copy the files specified in libman.json from node_modules to wwwroot/lib

Screenshots

Output from build:
1>------ Rebuild All started: Project: MyBlazorApplication, Configuration: Debug Any CPU ------
1>
1>Restore operation started...
1>libman.json : error LIB002: The "node_modules/font-awesome/" library could not be resolved by the "filesystem" provider
1>
1>One or more libraries failed to restore
1>Done building project "MyBlazorApplication" -- FAILED.

[jimmylewis]

LibMan's restore target is set to run before a number of different targets, so as to accommodate multiple operations. However, you can easily specify that yours should run before it.

I was able to reproduce your issue by simply creating a new project and setting the prebuild event to do as you mentioned. It created a target that looked like:

  <Target Name="PreBuild" BeforeTargets="PreBuildEvent">
    <Exec Command="npm install" />
  </Target>

If I changed the BeforeTargets value to LibraryManagerRestore it ensures that npm install is run before the libman steps.

  <Target Name="PreBuild" BeforeTargets="LibraryManagerRestore">
    <Exec Command="npm install" />
  </Target>

[ItsKaleb]

I will give that a shot, thanks