Enable source path mapping for deteministic builds #9874
Merged
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This fixes #8883 by copying/translating the Roslyn build tasks for SourceRoot mapping, along with the test cases they have identified, into FSharp.Build. In addition this sets up the changes to the msbuild targets so that the new task is called at the appropriate point in the compilation so enable deterministic build path mappings.
In an ideal world we'd just be picking up and consuming the shared build task, but until that blessed time we must forge our own paths.