fxutil

func Invoke ¶ added in v0.2.0

func Invoke(vals ...interface{}) Option

Invoke mimics fx.Invoke.

func InvokeIf ¶

func InvokeIf(cond bool, function interface{}) Option

InvokeIf invokes a given function if a condition is met.

func Options ¶ added in v0.2.0

func Options(opts ...Option) Option

Options combines multiples options into a one Option.

func OverrideSupply ¶ added in v0.2.0

func OverrideSupply(vals ...interface{}) Option

OverrideSupply overwrites values passed to Provide and Supply. It mimics fx.Supply with one difference - it does not error if there are multiple instances of a type are supplied/provided. Instead, OverrideSupply forces the supply and overrides other Supply and Provide.

Only one overriding must exist for a type.

Only recvs ptr to a value or an interface. To override an interface a ptr to the interface should be provided:

var r io.Reader
OverrideSupply(&r)

and not:

var r io.Reader
OverrideSupply(r)

Otherwise, real value of r will be provided, e.g. *bytes.Buffer.

func Provide ¶ added in v0.2.0

func Provide(vals ...interface{}) Option

Provide mimics fx.Provide. Provided ctors can be overridden by OverrideSupply.

func ProvideAs ¶

func ProvideAs(val interface{}, as ...interface{}) Option

ProvideAs mimics fx.Provide(fx.Annotate(fx.As())).

func ProvideIf ¶

func ProvideIf(cond bool, ctor ...interface{}) Option

ProvideIf provides a given constructor if a condition is met.

func Supply ¶ added in v0.2.0

func Supply(vals ...interface{}) Option

Supply mimics fx.Supply.

func SupplyAs ¶ added in v0.2.0

func SupplyAs(val interface{}, as interface{}) Option

SupplyAs mimics fx.Supply(fx.Annotate(fx.As())).

func SupplyIf ¶

func SupplyIf(cond bool, val ...interface{}) Option

SupplyIf supplies DI if a condition is met.