golang-google-wire

Compile-time dependency injection in Go uses google/wire to generate wiring code from provider sets and wire.Build graphs, ensuring type-safe constructor resolution without runtime reflection overhead.

Interface bindings in wire map interfaces to concrete implementations explicitly using wire.Bind mappings, ensuring dependency graphs resolve predictably and type-safely during code generation.

Organize constructors into reusable provider sets to keep large applications composable, allowing wire to resolve complex dependency graphs efficiently during code generation.

Cleanup handling in google/wire propagates shutdown logic through providers that return cleanup functions and errors, ensuring proper resource teardown when the dependency graph is torn down.

Yes, google/wire supports building test-only injectors and fake bindings for integration tests using wireinject build tags, keeping testing support isolated without changing production wiring.

Generated wiring fails when wire_gen.go is out of sync, requiring you to rerun code generation to regenerate the output instead of editing the generated file by hand.