Allow controlling box lookup order. about go.rice

[GeertJohan]

I think this could be usefull indeed.
It's ofcourse important to not break existing code using rice.
I think a lookup preference per FindBox call would be best (so not globally configurable). Then it would create something like rice.FindBoxLookup("boxName", rice.LookupFS, rice.LookupAppended, rice.LookupEmbedded).

Those LookupFS, LookupAppended etc could be typed constants:
type LookupPreference int
const LookupFS = LookupPreference(1)

That would make the function definition something like this:
func FindBoxLookup(boxName string, lookupPrefs []LookupPreference...)

Or maybe:

func FindBoxWithConfig(boxName string, config *FindBoxConfig)
type FindBoxConfig struct{
  LookupOrder []LookupPreference
}

What are yout thoughts about this?

I'm at vacation now, only a phone. Would be happy to take a PR though.

[GeertJohan]

Or maybe: func (c *Config) FindBox(boxName string) with Config being the same as above.

I like the type Config because it's likely that more options will be added in the future.

[augustoroman]

I like the Config approach too.

[GeertJohan]

Great! Are you willing to create this feature?

[augustoroman]

Yes, I'll take a stab at it later this week.

[GeertJohan]

Great, looking forward to it!

[GeertJohan]

This has been fixed by #19