Cake build NuGetPush throws permission denied - .net-core

Question

I'm building my .NET Core app in Travis CI using Cake script, when it comes to
var d = new DirectoryInfo(packageOutputPath.ToString());
var Files = d.GetFiles("*.nupkg").Select(x => new FilePath(x.FullName));
var key = EnvironmentVariable("NugetKey");
NuGetPush(Files, new NuGetPushSettings {
Source = Variables.NugetSource,
ApiKey = key
command I get:
An error occurred when executing task 'PushPackage'.
Error: One or more errors occurred. (Permission denied)
Permission denied
My .travis.yml file:
sudo: required
language: csharp
mono: none
dotnet: 2.1.402
before_install:
- chmod +x build.sh
script:
- ./build.sh --Target="PushPackage"
I have tried replacing - ./build.sh --Target="PushPackage" with - sudo bash build.sh --Target="PushPackage" but this did not help. Any suggestions why I'm getting this error?
build.sh file was builded according to this. Whole repo is here.

Answer 1

You should be using the DotNetCoreNuGetPush alias when using the .NET CLI, NuGetPush requires nuget.exe.
Example:
DirectoryPath packageOutputPath = MakeAbsolute(Directory("./nuget/"));
var settings = new DotNetCoreNuGetPushSettings
{
Source = "https://www.example.com/nugetfeed",
ApiKey = "4003d786-cc37-4004-bfdf-c4f3e8ef9b3a"
};
foreach(var file in GetFiles($"{packageOutputPath}/*.nupkg"))
{
DotNetCoreNuGetPush(file.FullPath, settings);
}