0.4.0

• New: Injected constructors may now be private. This can be useful for scenarios where you want @Inject-annotated constructors to only be invokable by Metro's generated code.
• New: If reporting is enabled, write unused bindings diagnostics to keys-unused-*.txt.
• New: Support for generic assisted injection.
• New: Support for generic member injection.
• New: Add diagnostic to prohibit type parameters on injected member functions.
• Enhancement: Enable child graphs to depend on parent-scoped dependencies that are unused and not referenced in the parent scope. This involves generating hints for scoped @Inject classes and is gated on a new Metro option enableScopedInjectClassHints, which is enabled by default.
• Enhancement: Check for context parameters in top-level function injection checker.
• Enhancement: Store member injection info in metro metadata to slightly optimize member injection code gen.
• Enhancement: Avoid writing providers fields in graphs for unused bindings.
• Enhancement: Improve missing binding trace originating from root member injectors.
• Fix: Fix support for generic injected constructor parameters.
• Fix: Fix support for repeated contributes annotations by moving contribution binding function generation to IR.
• Fix: Ensure scope/qualifier annotation changes on constructor-injected classes dirty consuming graphs in incremental compilation.
• Fix: Report member injection dependencies when looking up constructor-injected classes during graph population.
• Fix: Disable IR hint generation on JS targets too, as these now have the same limitation as native/WASM targets in Kotlin 2.2. Pending upstream support for generating top-level FIR declarations in KT-75865.
• Fix: Ensure private provider function annotations are propagated across compilation boundaries.
• Fix: Substitute copied FIR type parameter symbols with symbols from their target functions.
• Fix: Improved support for generic member injection.
• Fix: Propagate qualifiers on graph member injector functions.
• Fix: Fix support for requesting MembersInjector types.
• [internal] Report IR errors through IrDiagnosticReporter.
• [internal] Significantly refactor + simplify IR parameter handling.
• Fix publishing Apple native targets in snapshots.
• Update to Kotlin 2.2.0.
• Update Gradle plugin to target Kotlin language version to 1.9 (requires Gradle 8.3+).

Special thanks to @kevinguitar, @gabrielittner, and @JoelWilcox for contributing to this release!

What's Changed

• Update dependency com.facebook:ktfmt to v0.55 by @renovate in #602
• Update plugin shadow to v9.0.0-beta17 by @renovate in #605
• Update dependency Markdown to v3.8.1 by @renovate in #604
• Update dependency androidx.compose.material:material-navigation to v1.8.3 by @renovate in #606
• Update compose.jb to v1.8.2 by @renovate in #603
• Update dependency Markdown to v3.8.2 by @renovate in #612
• Update to Kotlin 2.2 by @ZacSweers in #396
• Update dependency pymdown-extensions to v10.16 by @renovate in #617
• Update dependency Pygments to v2.19.2 by @renovate in #616
• Build/run benchmarks on CI by @ZacSweers in #615
• Clean up comment by @ZacSweers in #618
• Enable windows samples runs by @ZacSweers in #620
• Update plugin mavenPublish to v0.33.0 by @renovate in #622
• Update to 2.2.0 final by @ZacSweers in #623
• Update plugin buildConfig to v5.6.7 by @renovate in #625
• Publishing fixes by @ZacSweers in #627

Full Changelog: 0.3.8...0.4.0