Added workaround for mac catalyst & supported mac catalyst.

[Kyome22]

close #34

Overview

In iOS, directories called Debug and Debug-iphonesimulator are created in the Build/Products directory, and it is known that the spp binary file is placed in both of them.
However, in the case of Mac Catalyst, only the Debug-maccatalyst directory is created in Build/Products.
Even though the path of context.tool(named: "spp") is Debug/spp.
As a result, the plugin fails to run on Mac Catalyst because the spp binary file cannot be found.

Related Issues

• Swift Package Plugin Context Tool Path is bugged when building for Mac Catalyst
• Can't build for macCatalyst SPM(library, plugin, executable)

This bug seems to be unfixed in Xcode 16.2. 🤮

How to fix

I verified whether the following API could be used, but found it to be of no use.

• #if targetEnvironment(macCatalyst)
• ProcessInfo.processInfo.environment["IS_MACCATALYST"] == "YES"
• ProcessInfo.processInfo.isMacCatalystApp

So I added a workaround to check in FileManager whether the Debug-maccatalyst directory exists.

[Kyome22]

The string we get with context.tool(named: "spp").path.string is "/${BUILD_DIR}/${CONFIGURATION}/spp"
If I could convert this to an absolute path, I could do string replacement, but I don't know how.

[Kyome22]

This workaround seems to work at first glance, but the build will fail immediately after a Clean Build.