Improve error message for dotnet add package NuGet.Versioning fails for Repository trusted signers

[erdembayar]

Let's say nuget.config contains below:

  <trustedSigners>
    <repository name="NuGetTrust" serviceIndex="https://api.nuget.org/v3/index.json">
      <certificate fingerprint="0e5f38f57dc1bcc806d8494f4f90fbcedd988b46760709cbeec6f4219aa6157d" hashAlgorithm="SHA256" allowUntrustedRoot="false" />
      <certificate fingerprint="5a2901d6ada3d18260b9c6dfe2133c95d74b9eef6ae0e5dc334c8454d1477df4" hashAlgorithm="SHA256" allowUntrustedRoot="false" />
      <owners>test</owners>
    </repository>
  </trustedSigners>

"dotnet add package nuget.versioning" fails, error message is not clear exact what failed: error: Value cannot be null. (Parameter 'path1')

info : Adding PackageReference for package 'nuget.versioning' into project 'C:\Users\xxxxxx\source\repos\SigningDemo\RestoreTest\RestoreTest.csproj'.
info :   CACHE https://api.nuget.org/v3/registration5-gz-semver2/nuget.versioning/index.json
info : Restoring packages for C:\Users\xxxxxx\source\repos\SigningDemo\RestoreTest\RestoreTest.csproj...
info :   CACHE https://api.nuget.org/v3-flatcontainer/nuget.versioning/index.json
info :   CACHE https://api.nuget.org/v3-flatcontainer/nuget.versioning/6.0.0/nuget.versioning.6.0.0.nupkg
info : Package 'NuGet.Versioning 6.0.0' from source 'https://api.nuget.org/v3/index.json': Signature Hash Algorithm: SHA256
error: NU3034: Package 'NuGet.Versioning 6.0.0' from source 'https://api.nuget.org/v3/index.json': This package is signed but not by a trusted signer.
log  : Package 'NuGet.Versioning 6.0.0' from source 'https://api.nuget.org/v3/index.json':
log  : Signature type: Author
info : Package 'NuGet.Versioning 6.0.0' from source 'https://api.nuget.org/v3/index.json': Verifying the author primary signature with certificate:
log  : Package 'NuGet.Versioning 6.0.0' from source 'https://api.nuget.org/v3/index.json':   Subject Name: CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US
info : Package 'NuGet.Versioning 6.0.0' from source 'https://api.nuget.org/v3/index.json':   SHA1 hash: A6E18D21B507879FC7F9C392A5CE355936E3AD2C
log  : Package 'NuGet.Versioning 6.0.0' from source 'https://api.nuget.org/v3/index.json':   SHA256 hash: AA12DA22A49BCE7D5C1AE64CC1F3D892F150DA76140F210ABD2CBFFCA2C18A27
info : Package 'NuGet.Versioning 6.0.0' from source 'https://api.nuget.org/v3/index.json':   Issued by: CN=DigiCert SHA2 Assured ID Code Signing CA, OU=www.digicert.com, O=DigiCert Inc, C=US
log  : Package 'NuGet.Versioning 6.0.0' from source 'https://api.nuget.org/v3/index.json':   Valid from: 9/29/2020 5:00:00 PM to 10/5/2023 5:00:00 AM
info : Package 'NuGet.Versioning 6.0.0' from source 'https://api.nuget.org/v3/index.json': Timestamp: 10/22/2021 7:23:16 PM
info : Package 'NuGet.Versioning 6.0.0' from source 'https://api.nuget.org/v3/index.json': Verifying author primary signature's timestamp with timestamping service certificate:
info :   Subject Name: CN=Symantec SHA256 TimeStamping Signer - G3, OU=Symantec Trust Network, O=Symantec Corporation, C=US
info :   SHA1 hash: A9A4121063D71D48E8529A4681DE803E3E7954B0
info :   SHA256 hash: C474CE76007D02394E0DA5E4DE7C14C680F9E282013CFEF653EF5DB71FDF61F8
info :   Issued by: CN=Symantec SHA256 TimeStamping CA, OU=Symantec Trust Network, O=Symantec Corporation, C=US
info :   Valid from: 12/22/2017 4:00:00 PM to 3/22/2029 4:59:59 PM
info : Package 'nuget.versioning' is compatible with all the specified frameworks in project 'C:\Users\xxxxxx\source\repos\SigningDemo\RestoreTest\RestoreTest.csproj'.
error: Value cannot be null. (Parameter 'path1')


Usage: NuGet.CommandLine.XPlat.dll package add [options]

Options:
  -h|--help               Show help information
  --force-english-output  Forces the application to run using an invariant, English-based culture.
  --package               Id of the package to be added.
  --version               Version of the package to be added.
  -d|--dg-file            Path to the dependency graph file to be used to restore preview and compatibility check.
  -p|--project            Path to the project file.
  -f|--framework          Frameworks for which the package reference should be added.
  -n|--no-restore         Do not perform restore preview and compatibility check. The added package reference will be unconditional.
  -s|--source             Specifies NuGet package sources to use during the restore.
  --package-directory     Directory to restore packages in.
  --interactive           Allow the command to block and require manual action for operations like authentication.
  --prerelease            Allows prerelease packages to be installed.