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[gazelle] Add support for Kotlin sources #375
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This has a lot of in-progress stuff in the KtParser for trying figure out how to properly handle fully-qualified types all over Kotlin code
This includes inline functions.
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gibfahn
approved these changes
Oct 18, 2025
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Mostly rubberstamp LGTM.
The changes to existing files seem reasonable, and given we don't have any Kotlin support, let's get this landed and iterate.
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This adds support for generating build files from Kotlin sources, as well as mixed Kotlin/Java sources. Language features which add implicit dependencies are supported via
exportsfrom the libraries that create them.As with the existing java parser, the new
KtParserrelies on the tooling provided by JetBrains to accurately parse the source files.A follow up PR is required to properly support test generation, because at the moment this will always generate a
java_test_suitewith Kotlin sources. For now, a "fix" for this is to override thejava_test_suitewith a custom mapping (eg.# gazelle:map_kind java_test_suite kt_jvm_test_suite //kotlin:defs.bzl) though it is clearly not ideal.The initial work and heavy lifting was by Morgan Roff, but I've since continued working on this PR.