Need way to change something in the root path

[pbakaus]

Library Affected:
sw-build

Browser & Platform:
all browsers

Issue or Feature Request Description:
My server maps /assets to /static and so I need a way to replace assets with static. rootDirectory doesn't work as it only accepts actual paths that exist.

[jeffposnick]

Cf. replacePrefix in sw-precache.

[devnook]

+1

[gauntface]

cc @jeffposnick @addyosmani

Using names from this suggestion, modifyUrlPrefix seems like a better name than replacePrefix, stripPrefix and stringPrefixMulti.

modifyUrlPrefix: {
  '/assets': '/static',
  '/dist/app': ''
}

Replace prefix is dropped and forces developer to define an empty string, stripPrefix and stringPrefixMulti are just morphed into the key value approach above.

[addyosmani]

I'm strongly in favor of just implementing modifyUrlPrefix instead of the trio of original versions of this from sw-precache. Looking at GitHub codesearch, usage of the older versions is low/not there and I don't see this breaking a huge number of folks. Having a migration path for the few that do need this should be sufficient.