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Sorry for the multiple questions. I did search through the previous issues, but could not find what I was looking for.
I'm trying to have a function that would return a variable number of dependencies to add to the DI container, but where the function also received some dependencies from previously declared di.Provide. I saw this answer which seems to hint that it's possible for a di.Provide to return di.Option, but I cannot make it work.
Here is an example:
type moduleConfig struct {
di.Inject
cfg1 string `di:"cfg=m1.v1"`
cfg2 string `di:"cfg=m2.v1"`
}
func provideModules(cfg moduleConfig) di.Option {
//imagine some hypothetical conditions to decide which modules to create. 0-n modules can be created
//using moduleConfig to decide...
return di.Options(
di.Provide(m1.NewModule1, di.As(new(component.Module))),
di.Provide(m2.NewModule2, di.As(new(component.Module))),
)
}
func startModules(modules []component.Module) error {
//... do something with the declared modules
return nil
}
func main() {
c, err := di.New(
di.ProvideValue("aaa", di.Tags{"cfg": "m1.v1"}),
di.ProvideValue("bbb", di.Tags{"cfg": "m2.v1"}),
di.Provide(provideModules),
)
if err != nil {
panic(err)
}
err = c.Invoke(startModules)
if err != nil {
panic(err)
}
}
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