Here's the problem: most downstreams can't use mach bootstrap. And gn is not something that is available independently (and even if it were, I'm not even sure there's a guarantee that there's forward and backwards compatibility)

(In reply to Mike Hommey [:glandium] from comment #1) > Here's the problem: most downstreams can't use mach bootstrap. And gn is not > something that is available independently (and even if it were, I'm not even > sure there's a guarantee that there's forward and backwards compatibility) The conclusion from bug 1336429 was that we need to start requiring gn to build Firefox with webrtc. What do we need to do to meet the needs of downstreams?

If we can't generate moz.build from gn data, I'm afraid the only option is to vendor gn...

(which, incidentally, would fix the problem of getting the gn source for the gn taskcluster task)

We're not going to require gn to build for now.

Closing based on comment 5.