hostpolicy.dll not found for custom DotnetCliTool

Steps to reproduce

git clone https://github.com/ctaggart/sourcelink-test --single-branch --branch hostpolicy
cd sourcelink-test\src\ClassLibrary1
dotnet restore
dotnet sourcelink

Expected behavior

I get the same output as when running dotnet run when building the custom DotnetCliTool:

PS C:\Users\camer\cs\SourceLink\dotnet-sourcelink> dotnet run
SourceLink: Source Code On Demand

Usage: dotnet sourcelink [options] [command]

Options:
  -h|--help  Show help information

Commands:
  print-json  print the Source Link JSON stored in the Portable PDB file

Use "dotnet sourcelink [command] --help" for more information about a command.

Actual behavior

PS C:\Users\camer\cs\sourcelink-test\src\ClassLibrary1> dotnet sourcelink
A fatal error was encountered. The library 'hostpolicy.dll' required to execute the application was not found in 'C:\Users\camer\.nuget\packages\.tools\dotnet-sourcelink\2.0.0-b318\netc
oreapp1.0'.

Environment data

dotnet --info output:

PS C:\Users\camer\cs\sourcelink-test\src\ClassLibrary1> dotnet --info
.NET Command Line Tools (1.0.0-rc3-004530)

Product Information:
 Version:            1.0.0-rc3-004530
 Commit SHA-1 hash:  0de3338607

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.14393
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\1.0.0-rc3-004530

[TheRealPiotrP]

@ctaggart I found the issue. The nupkg for dotnet-sourcelink does not include the app’s runtimeconfig.json file. As a result, it’s not a valid tool. I fixed this for my local repro by copying another app’s runtimeconfig.json next to the app.dll, changing file names to match.

Take a look at @blackdwarf’s great explanation here which includes a csproj snippet that causes the runtimeconfig.json to be included!

[jroux-git]

Thank @piotrpMSFT. This was a very frustrating issue because of the ambiguous error message. Did a dotnet pack and the runtimeconfigs file was there.