tree 3fc0c6f571937090a3a8e2e1e50db478b6cd5057
parent 6d0764842bd11cf1d786b7f508dc9ee02a636c65
author Jean de Klerk <deklerk@google.com> 1545356667 -0800
committer Jonathan Amsterdam <jba@google.com> 1545417282 +0000

cmd/apidiff: check for package existence

This provides a nicer error experience when providing a package that does not
exist.

Change-Id: I816df12556832af67f432cccd91da2dc5232b798
Reviewed-on: https://go-review.googlesource.com/c/155577
Reviewed-by: Jonathan Amsterdam <jba@google.com>