Background

This issue tracks one of the BuildCheck analyzers we would like to ship in-box with MSBuild.

Goal

Implement an analyzer with the following rule: No item is attempted to be updated using the Update attribute inside a target.

Notes

While the Update attribute can be added to items inside a target, it is ignored and the transformation is applied to all items of the given type. Implementing this analyzer will likely require introducing TaskParameterMessageKind.UpdateItem to communicate the attempted operation to the analyzer.