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Jextract CLI doesn't have a way to pass .swiftinterface files #484
Description
The jextract CLI doesn't allow passing .swiftinterface files. I built the CLI with swift build --product swift-java, produced the .swiftinterface with:
xcodebuild clean build -workspace Samples/SwiftJavaExtractFFMSampleApp/ -scheme SwiftJavaExtractFFMSampleApp -destination generic/platform=macOS -derivedDataPath dd SWIFT_EMIT_MODULE_INTERFACE=YES ARCHS=arm64
And tried importing it with:
./.build/arm64-apple-macosx/debug/swift-java jextract --swift-module MySwiftLibrary --input-swift dd/Build/Products/Debug/MySwiftLibrary.swiftmodule/arm64-apple-macos.swiftinterface --java-package com.example.swift --output-swift S1 --output-java J1
This capability seems to be intended from the sources. With a minor tweak here, I was able to get jextract to accept the .swiftinterface file, and it produced a Java API similar to the API it makes from sources.
Activity
ktoso commentedon Dec 11, 2025
We originally were driving everything from interfaces and then moved to swift files, but yes, it is intended to allow either!
Would you want to submit your small tweak
swift-java/Sources/JExtractSwiftLib/Swift2Java.swift
Line 52 in 2534f41
here as a PR please? We can also add some test-case for this in Samples probably ... best discussed in a PR and I can help out finish it up