exportdata

Overview ¶

Package exportdata optionally carries dependencies' export data inside the binary.

A scan that cannot reach GOROOT or a module cache - a WASI guest with only the project mounted, a browser - still needs its dependencies' types, and reading them from precomputed export data costs a fraction of type-checking them from source. Carrying that data in the binary enables such a build self-contained.

It is opt-in, because it is several megabytes that most builds have no use for:

go run ./hack/genexportdata -out internal/exportdata/exportdata.zip std github.com/go-openapi/...
go build -tags exportdata ./cmd/genspec-wasi

Without the tag, Embedded reports that nothing is embedded and the caller falls back to whatever the environment offers. The archive is valid only for the toolchain that generated it.