Flubu is A C# library for building projects and executing deployment scripts using C# code.

Flubu main features :

- Net Core support - Easy to learn and to use because you write build script entirely in C#. - Quite a lot of built in tasks (compile, running tests, managing iis, creating deploy - package, publishing nuget packages, executing powershell scripts...)- - Write your own custom c# code in script and execute it. - Run any external program in script. - Reference any .net library or c# source code file in buildscript. - Fluent interface and intelisense. - Write tests, debug your build script. - Use flubu tasks in any other application. - Web api is available for flubu. Useful for automated deployments remotely. - Write your own flubu tasks and extend flubu fluent interface with them.

Programming language: C#
License: MIT License
Tags: Build     Build Automation     Script    
Latest version: v5.1.1

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Build Status NuGet Badge Gitter Member project of .NET Foundation Member project of .NET Core Community License


"FlubuCore - Fluent Builder Core" is a cross platform build and deployment automation system. You can define your build and deployment scripts in C# using an intuitive fluent interface. This gives you code completion, IntelliSense, debugging, FlubuCore custom analyzers, and native access to the whole .NET ecosystem inside of your scripts.

FlubuCore in action

FlubuCore offers a .net (core) console application that uses power of roslyn to compile and execute scripts. Above example can be run from console with:

  • FlubuCore runner (.NET 4.62+) flubu.exe Default
  • FlubuCore dotnet cli tool (.NET Core 1.0+) dotnet flubu Default
  • FlubuCore local or global tool (.NET Core 2.1+) flubu Default

    Features and Advantages

  • Intuitive an easy to learn. C#, fluent interface, and IntelliSense make even most complex script creation a breeze.

    [FromArg("nugetKey", "Nuget api key for publishing Flubu nuget packages.")]
    public string NugetApiKey { get; set; }

    protected override void ConfigureTargets(ITaskContext context)
        var pack = context.CreateTarget("Pack")
            .SetDescription("Prepare's nuget package.")
            .AddCoreTask(x => x.Pack()
                .WithArguments("--force")); //you can add your own custom arguments on each task

        var branch = context.BuildSystems().Travis().Branch;

        var nugetPush = context.CreateTarget("Nuget.publish")
            .SetDescription("Publishes nuget package.")
            .AddCoreTask(x => x.NugetPush($"{OutputDirectory}/NetCoreOpenSource.nupkg")
            .When(c => c.BuildSystems().RunningOn == BuildSystemType.TravisCI
                        && !string.IsNullOrEmpty(branch)
                        && branch.EndsWith("stable", StringComparison.OrdinalIgnoreCase));
  • Large number of often used built-in tasks like e.g. versioning, running tests, creating deployment packages, publishing NuGet packages, docker tasks, git tasts, sql tasks, npm tasks, executing PowerShell, managing IIS scripts and many more.
   .AddTask(x => x.GitVersionTask())
   .AddTask(x => x.CompileSolutionTask("MySolution.sln").BuildConfiguration("Release");

   .AddTask(x => x.XunitTaskByProjectName("MyProject").StopOnFail())
   .AddTask(x => x.NUnitTask(NunitCmdOptions.V3, "MyProject2").ExcludeCategory("Linux"))
   .AddCoreTask(x => x.CoverletTask("MyProject.dll"));
        .Do(c =>
            // write your awesome code.
            File.Copy("NotSoAwesome.txt", Path.Combine(OutputDirectory, "JustAnExample.txt") );
            // Access flubu built in tasks in DO if needed.
        .AddTask(x => x.CompileSolutionTask())
[NugetPackage("Newtonsoft.json", "11.0.2")]
public class BuildScript : DefaultBuildScript
   public void NuGetPackageReferencingExample(ITaskContext context)
    .AddTask(x => x.RunProgramTask(@"packages\LibZ.Tool\1.2.0\tools\libz.exe")
        .WithArguments("--libz", "Assemblies.libz"));
 public class SimpleScript : DefaultBuildScript
    [FromArg("c", "The configuration to use for building the project.")]
    public string Configuration { get; set; } = "Release"

    [FromArg("sn", "If true app is deployed on second node. Otherwise not.")]
    public bool deployOnSecondNode { get; set; }

    protected override void ConfigureTargets(ITaskContext context)
            .AddCoreTask(x => x.Build()
                .ForMember(x =>  x.Framework("net462"), "f", "The target framework to build for.")); 
  flubu build -c=Debug -f=netcoreapp2.0
      .AddCoreTask(x => x.Build("MySolution.sln").Configuration("Release"); 

flubu example --configuration=Debug

flubu would execute dotnet build MySolution.sln --configuration Debug

  • Full .NET Core support including the local and global CLI tool

    dotnet tool install --global FlubuCore.Tool
    flubu compile
  • FlubuCore interactive mode which offers target tab completition, options tab completition, toogle targets/options, executed commands history. It is also possible to execute external commands and operable programs. For some of them FlubuCore offers tab completion with help displayed at the bottom of console out of the box(such as dotnet, git..)

FlubuCore interactive mode

FlubuCore analyzers in action

Getting Started

Using FlubuCore is straightforward and very simple :-) It is also fully and throughly documented.

The Getting Started chapter in FlubuCore Documentation will help you set up your first FlubuCore build in no time. You should also check getting started blog. It has some more details with some nice tips and tricks.

A comprehensive list of features that FlubuCore has to offer with descriptions can be found in the Build Script Fundamentals chapter.

Once you have your build and deployment scripts defined, the following Wiki chapters will explain how to run them:


Aside from the detailed Wiki FlubuCore comes with example projects that reflect real-life situations. The examples can be found in the separate Examples repository.

These examples will help you to get quickly start with FlubuCore:

  • .NET Framework build example - Example covers versioning, building the project, running tests, packaging application for deployment and some other basic use cases.

  • .NET Core build example - Example covers versioning, building the project, running tests, packaging application for deployment and some other basic use cases.

  • Deployment script example - Example shows how to write simple deployment script.

  • Open source library example - Example covers versioning, building the project, running tests and publishing nuget package. It also covers how to run build script on Appveyor and Travis CI.

    Have a question?

Join the chat at https://gitter.im/FlubuCore/Lobby



Ways to Contribute

  • We appreciate deeply any feedback that you may have! Feel free to participate in the chat, or add an issue in the issue tracker.
  • Spread the word about the project.
  • If you like the project don't forget to give it a star so that the community get's bigger.
  • Improve documentation.
  • Report, fix a bug.
  • Implement a new feature.
  • Discuss potential ways to improve project.
  • Improve existing implementation, performance, etc.

Changelog and Roadmap

Changes with description and examples can be found in Changelog

You can see FlubuCore roadmap by exploring opened Milestones.

Further Development

If you find FlubuCore useful (you feel it helps you on the daily basis) you can support further development by buying us a coffee (or become a backer or sponsor). Sometimes it's hard to stay awake till midnight implementing new features, coffee helps us with that. We would really appreciate your support. Money from sponsorship will also be used for the promotion of the project. If you are a backer or a sponsor you can also request for a new feature or ask for support. These issues will be handled with highest priority.

Backers and Sponsors

OpenCollective OpenCollective

Used & Powered by

Thank's to Comtrade for supporting us.

FlubuCore analyzers in action


  • Special thanks to @ironcev for greatly improving readme and for giving some valuable advices.
  • Special thanks to @alexinea for translating whole documentation to Chinese.
  • Special thanks to @huanlin for writing blogs about FlubuCore in Traditional Chinese and for translating them to English.

Code of Conduct

This project has adopted the code of conduct defined by the Contributor Covenant to clarify expected behavior in our community. For more information see the .NET Foundation Code of Conduct.

.NET Foundation

This project is supported by the .NET Foundation.

*Note that all licence references and agreements mentioned in the FlubuCore README section above are relevant to that project's source code only.