diagnose-api-breaking-changes command doesn't support swiftbuild build system

[cmcgee1024]

Is it reproducible with SwiftPM command-line tools: swift build, swift test, swift package etc?

• Confirmed reproduction steps with SwiftPM CLI. The description text must include reproduction steps with either of command-line SwiftPM commands, swift build, swift test, swift package etc.

Description

The APIDiff directly invokes the native build system, and uses the build plan, which is specific to that build system, to pass build parameters to the API digester tool. Instead, it should be possible to configure the build system to Swift Build, and then the build parameters created independently from a build plan.

The same thing applies to the APIDigester. It also needs the build plan to get API tool common arguments. This will need to be determined in a different way.

Expected behavior

No response

Actual behavior

No response

Steps to reproduce

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Swift Package Manager version/commit hash

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Swift & OS version (output of swift --version ; uname -a)

No response