In this tutorial, we’ll cover some basics on how to create a Nuget package. We’ll also look at a way to host your own private Nuget repository. To complete the tutorial, you’ll need to download the NuGet.exe command line utility.
Note: You should consider putting this utility in your system path. I have a dropbox folder on all my machines C:\Users\Kyle\Dropbox\Utils that I put command line utilities in, and then update the PATH variable for my machine.
1. Start by creating a folder for your NuGet packages. I recommend C:\Users\your_username\.nuget (if you create this folder in explorer, it may complain if you don’t name the folder “.nuget.” with the trailing period. Explorer will strip off the trailing period when it’s created).
2. Download the .zip sample project here, and unzip it into a subfolder with the name of the Nuget package you wish to create (i.e. \.nuget\NugetDemo\)
3. You’ll see folders here for /content/ and /lib/.
/content/ – any files here simply unzip into the root of the project, so anything you put here will dump as is to the project the package is being added to. You just match the structure you want to have it unpack into and Nuget will unzip it into your package accordingly. The example from #2 uses a ‘Controllers’ and ‘Views’ folder from an sample C# MVC project. The root content folder also contains a web.config.transform. The changes in .config.transform files are added to the matching .config file in the project. In this example, I have an appsettings key I am adding.
/lib/ – contains your binary files you want to include in subfolders based on framework version. In the example from #2, I have a .NET 4.5 (net45) subfolder, and a dll called Utils that I am packaging in. This will be added to my project as a referenced dll when I install the Nuget package. Utils just contains some sample extension methods which are used in the Controller and View from /content/.
/tools/ – (not included, but could be here if necessary) is for powershell scripts you wish to have executed automatically at installation time. I haven’t included any in this sample, but there is plenty of documentation out there on Powershell and what can be done with Nuget packages.
readme.txt – this file is in the root folder and is opened automatically (but not added to the project) when the package is installed.
4. From the root folder (the one with readme.txt) run the command ‘nuget spec MyPackageName’. This will create a file named MyPackageName.nuspec. Note: Be sure Nuget.exe is added to your %PATH% variable as noted earlier
5. Open and analyze MyPackageName.nuspec. This file contains information about your package (Author, License URL, Version, Project URL, License, Copyright, and Dependencies). Go ahead and delete the ‘Dependencies’ element and update the rest of the information to match how you would like it to look.
6. After you finish updating the MyPackageName.nuspec, run the command (from the same directory as #4) ‘nuget pack’. This will create your Nuget package. Congratulations, you just wrote your first Nuget package! To make the next step simpler, move the newly created .nupkg file and place it in the ‘C:\Users\your_username\.nuget\ folder.
7. Inside Visual Studio, select “Tools > Nuget Package Manager > Package Manager Settings’. Then select “Package Sources” and use the “+” icon to add a new source. Attached is a screenshot of how I have added my own person Nuget repository.
8. Now, create a basic C# MVC application. Right click your new web project and select “Manage Nuget Packages”. You see your source on the left rail. Go ahead and add your package you created from step #6. Note that ‘Controllers’ now has an ‘Extensions’ subfolder, ‘Views’ now has an ‘Extensions’ subfolder, Web.config has an AppKey named ‘ExtensionsKey’ and your project has a reference named ‘Utils’ that was not there before. Also, a file called “readme.txt” showed up in your solution explorer although it was not added to your project.
9. If you debug/run your application and head to the Url /extensions/strings/ you’ll see that the Extensions controller action ‘Strings’ will execute, leveraging the namespace/dll Utils to present some information. Congrats!