Example build.cake script

build.cake

// Using Cake (C# Make) http://cakebuild.net

#tool "nuget:?package=GitVersion.CommandLine"
#tool "nuget:?package=GitReleaseNotes"

var target = Argument("target", "Default");
var targetProject = "./src/ProjectA/project.json";

var configuration = Argument("configuration", "Release");
var outputDir = Argument("output", "./artifacts/");

Task("Clean")
    .Does(() => {
        if (DirectoryExists(outputDir)) {
            DeleteDirectory(outputDir, recursive:true);
        }
    });

Task("Restore")
    .Does(() => {
        DotNetCoreRestore("./src/");
    });

GitVersion versionInfo = null;

Task("Version")
    .Does(() => {

        GitVersion(new GitVersionSettings{
            OutputType = GitVersionOutput.BuildServer
        });

        versionInfo = GitVersion(new GitVersionSettings{ OutputType = GitVersionOutput.Json });

        var projects = System.IO.Directory.GetFiles(System.Environment.CurrentDirectory,
            "project.json", System.IO.SearchOption.AllDirectories);

        foreach (var project in projects) {
            var updatedProjectJson = System.IO.File.ReadAllText(project)
                .Replace("1.0.0-*", versionInfo.SemVer);

            System.IO.File.WriteAllText(project, updatedProjectJson);
        }
    });

Task("Build")
    .IsDependentOn("Clean")
    .IsDependentOn("Version")
    .IsDependentOn("Restore")
    .Does(() => {
        DotNetCoreBuild(targetProject);
    });

Task("Package")
    .IsDependentOn("Build")
    .Does(() => {
        var settings = new DotNetCorePackSettings
        {
            OutputDirectory = outputDir,
            NoBuild = true
        };

        DotNetCorePack(targetProject, settings);
    });

Task("Default")
    .IsDependentOn("Package");

RunTarget(target);

tools\nuget.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <!-- http://docs.nuget.org/consume/nuget-config-file -->
    <packageSources>
        <add key="nuget.org" value="https://www.nuget.org/api/v2/" />
    </packageSources>
    <activePackageSource>
        <add key="nuget.org" value="https://www.nuget.org/api/v2/" />
    </activePackageSource>
</configuration>

tools\packages.config

<?xml version="1.0" encoding="utf-8"?>
<packages>
    <package id="Cake" version="0.14.0" />
</packages>