I have a .NET Core project that is auto-built in Appveyor and deployed to Nuget. By default, every successful build causes a new Nuget release.
However, there are many cases when a new release is meaningless because the library's actual code has not changed:
It is possible to configure the build so that Nuget publishing only runs if there are changes in the actual code (for example, in folder X)?
There are a few options.
Commit filtering. Note that with it the whole build, not just deployment will be skipped if nothing in folder x changed. You may need a build without deployment at least when unit tests added. As a workaround consider adding separate AppVeyor project which will build and deploy only if folder x changed and keep current project to build every time, but not deploy
Inspect changed files with script. Please check this sample on how to check those files if you use GitHub. So if you see that files in folder x changed, you can set some custom environment variable (lets say you call it deploy_nuget) to true, and use it with a conditional deployment.