If a URL based source does not match the shasum recorded in the
lockfile, it likely means a new version has been pushed to the remote
source. In this case, we fail to help ensure that when using a lockfile
we always run the same code as when the lockfile was created.
Signed-off-by: Steven Danna <steve@chef.io>
This adds a new git fetcher. In doing so, it also refactors how the
fetchers work a bit to better support fetchers that need to resolve
user-provided sources to fully specified sources appropriate for a
lockfile.
Signed-off-by: Steven Danna <steve@chef.io>
