In the rare case that the updater downloads the same binary (validated via checksum)
we want to make sure that the updater does not attempt to upgrade and restart the cloudflared
process. The binaries are equivalent and this would provide no value.
However, we are covering this case because there was an errant deployment of cloudflared
that reported itself as an older version and was then stuck in an infinite loop
attempting to upgrade to the latest version which didn't exist. By making sure that
the binary is different ensures that the upgrade will be attempted and cloudflared
will be restarted to run the new version.
This change only affects cloudflared tunnels running with default settings or
`--no-autoupdate=false` which allows cloudflared to auto-update itself in-place. Most
distributions that handle package management at the operating system level are
not affected by this change.
cloudflared tail will now fetch the management token from by making
a request to the Cloudflare API using the cert.pem (acquired from
cloudflared login).
Refactored some of the credentials code into it's own package as
to allow for easier use between subcommands outside of
`cloudflared tunnel`.
Devin Carr
Nuno Diegues