Adds a "-tags" flag that'll allow build tags
to be passed in and added to the very top of the
generated and bundled file.
For example, when generating h2_bundle.go for
net/http, we'll now be able to do:
bundle -tags '!nethttpomithttp2' -o h2_bundle.go
-prefix http2 golang.org/x/net/http2
Updates golang/go#35082
Change-Id: I55edd7227aec8641b60ba560c79e0d50d0692d52
Reviewed-on: https://go-review.googlesource.com/c/tools/+/205017
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
423eeaeda5