Two main things happened here:
1. Manually encrypted files instead of using `travis encrypt-file`
2. Removed OAUTH2CLIENT_TEST_USER_KEY_PATH fallback.
The first was because `travis encrypt-file` was failing mysteriously.
To make up, I ran
openssl enc -d -a -md sha1 -aes-256-cbc -nosalt -p
and typed random noise into the keyboard to create a candidate KEY and
IV (H/T http://superuser.com/a/471524). After doing this, they were set
via
travis env set OAUTH2CLIENT_KEY "..KEY.." --repo "google/oauth2client"
travis env set OAUTH2CLIENT_IV "..IV.." --repo "google/oauth2client"
To actually do the encryption locally:
openssl aes-256-cbc -K "..KEY.." \
-iv "..IV.." \
-in file-to-encrypt \
-out file-to-encrypt.enc -e
As for the second change, OAUTH2CLIENT_TEST_USER_KEY_PATH was previously
allowed to fallback to client._get_well_known_file() in system tests, but this
is a problem since that function throws an OSError when the directory does not
exist. (It does not exist on Travis.)
381aac7ffa