tree 2e1a9e03642fe9e20e6195c3a9ecfce9a8685dc2
parent 019eed553f0125ebd221f203a504368ad30fb866
author Luke Granger-Brown <git@lukegb.com> 1493917429 +0100
committer Francesc Campoy Flores <campoy@golang.org> 1503529317 +0000

gosrc: use default branch for GitHub presentations

At present, gosrc assumes that GitHub presentations always store their
files in master branch. If a GitHub repo has a non-master default
branch, then although the presentation file itself is fetched from that
branch, all the files will be retrieved from master, which is a
confusing behaviour.

This change looks up which branch is selected as the default branch, at
the cost of an extra API call against GitHub when a presentation is
fetched.

Related to #482, although this change merely makes talksapp respect the
default branch, without allowing specification of a particular branch in
the URL.

Change-Id: Ic78f9e86e68696463cb15175d7b133252abf9917
Reviewed-on: https://go-review.googlesource.com/42653
Reviewed-by: Francesc Campoy Flores <campoy@golang.org>