Shared Code

Kotlin common code holds most of the program. core and scan have no platform source sets, and host holds every expect and actual pair. The share of non-comment lines under src/common/main in each module, as ./gradlew sharedRatio measures it:

Shared code 93.8%: host 58.1%, core 100.0%, scan 100.0%, cli 83.7%, studio 95.0%, bench 82.5%

./gradlew sharedRatio prints the common and platform line counts per module and fails the build when the total falls below its floor, when host exceeds its platform-line budget or when core has any platform lines. It also fails when the line above is out of date; ./gradlew sharedRatioReadme rewrites it.

The platform lines of host are the process runners (POSIX, Windows and JVM) and the file and environment access. The platform lines of cli are the file and socket code behind install and serve. The ratio counts the default targets: JVM, Linux, macOS, Windows and Wasm. core and the common code of bench use no Double or Float, so their results are the same on every target. See Architecture for the module layout.