.NET Templates for C# Libraries, GitHub Actions and NuGet Publishing

.NET Templates for C# Libraries, GitHub Actions and NuGet Publishing

5/4/2020 5:20:00 PM

Whenever I'm looking to put out a new library I find myself configuring everything in repetitively simple ways. The default File -> New Project templates that Visual Studio ships with never quite get it right for my default library topology.

Almost every single thing I build looks like this:

Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
d-----        04/05/2020   1:16 PM                .github               # GitHub actions build scripts
d-----        04/05/2020   1:10 PM                adr                   # Architecture decision register
d-----        04/05/2020   1:05 PM                artifacts             # Build outputs
d-----        04/05/2020   1:05 PM                build                 # Build scripts
d-----        04/05/2020   1:05 PM                docs                  # Documentation markdowns
d-----        04/05/2020   1:05 PM                lib                   # Any non-package-managed libs
d-----        04/05/2020   1:05 PM                samples               # Examples and samples
d-----        04/05/2020   4:23 PM                src                   # Source code
d-----        04/05/2020   4:21 PM                test                  # Tests
-a----        03/09/2019   8:59 PM           5582 .gitignore
-a----        04/05/2020   4:22 PM           1833 LibraryTemplate.sln
-a----        04/05/2020   1:02 PM           1091 LICENSE
-a----        04/05/2020   3:16 PM            546 README.md
-a----        04/05/2020   1:08 PM              0 ROADMAP.md

So I spent the afternoon deep diving into dotnet templating and creating and publishing a nuget package to extend .NET new with my default open source project directory layout.

Installation and usage

You can install this template from the command line:

dotnet new -i ElectricHead.CSharpLib

and then can create a new project by calling

dotnet new csghlib --name ElectricHead.MySampleLibrary

Topology and conventions

This layout is designed for trunk based development, against a branch called dev. Merging to master, triggers publishing.

  • Commit work to a branch called dev.
  • Any commits will build and be tested in release mode by GitHub Actions.
  • Merge to master will trigger Build, Test and Publish to NuGet
  • You need to setup your NuGet API key as a GitHub Secret called NuGetApiKey

You need to use the csproj to update your SemVer version numbers, but GitHubs auto-incrementing build numbers will be appended to the build parameter in your version number, so discrete builds will always create unique packages.

The assembly description will be set to the SHA of the commit that triggered the package.

GitHub Actions

Pushing the resulting repository to GitHub will create builds and packages for you as if by magic. Just be sure to add your NuGet API key to your repositories Secrets from the Settings tab, to support publishing to NuGet.org