dotnet compile check if source file exists before precompile event

[enricosada]

I generate some source files in the precompile event (using a tool), but atm i need to add a placeholder file (empty it's ok) because dotnet compile check if all source file exists before calling precompile (ref source).

In the example below, a Generated.cs placeholder is needed because otherwise i get the error:

Compiling gensource for DNXCore,Version=v5.0
Can't find file Generated.cs

If i create an empty Generated.cs, everything it's ok

An example ( replace a dotnet new with this project.json )

{
    "version": "1.0.0-*",
    "compilationOptions": {
        "emitEntryPoint": true
    },

    "compileFiles": [
        "Generated.cs",
        "Program.cs"
    ],

    "scripts": {
        "precompile": [
            "cmd /c echo namespace Gen { class GenClass { } } > Generated.cs"
        ],
    },

    "dependencies": {
        "NETStandard.Library": "1.0.0-rc2-23811"
    },

    "frameworks": {
        "dnxcore50": { }
    }
}

[enricosada]

I think that's annoying because the precompile event it's useful to to create and use generated files (like a dotnet-tt tool).

If it's ok, i can implement the fix

[ncthbrt]

I'm building a dotnet cli extension which is affected by this issue. Is there any word as to whether this is planning on being fixed?