The diff was incorrect. It was doing `diff -NIaupr`. And so diff was
interpreting the argument to -I to be `aupr`. So it was not running
recursively. The fix is not so simple because there is an intentionally
broken symlink in one of the godeps. Which diff -r fails on by default.
On linux there is an options to not dereference symlink and just make
sure they point to the same thing. No so on OS X. So we have to exclude
all files called "symlink". Which thankfully there is only one of.
It is a pretty slow test (it downloads fresh) all of kube's Godeps, so only
run it when needed in pre-commit hook.
This also means that random changes to other non-kube repositories could
cause travis/shippable to just randomly stop working for all PRs which touch
Godeps after that moment (even though no changes have been made to Godeps by
us). Examples would be things like other repos completely disappearing. Or
even the directory we include disappearing in master in the remote
project (even though the directory may exist at the commit we care
about) This is a bugwin godep, but it is a problem we have seen happen
with kube Godeps.
laushinka