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Replace the lock file mechanism with PID+start-time based stale
detection so that no cleanup is required on process death.
When both org and app token locks were held, the first signal handler
to call os.Exit() would kill the process before the second handler
could delete its lock file. The orphaned lock file then caused the
next invocation to wait ~128 seconds in an exponential backoff loop
before forcibly deleting it. The same issue occurred on SIGKILL, OOM,
or any non-signal death.
Lock files now contain the holder's PID and process start time as
JSON. On acquisition, if a lock file already exists, the recorded
process is checked for liveness via gopsutil. Stale locks are
reclaimed immediately with no backoff. Atomic O_CREATE|O_EXCL
prevents races between concurrent acquirers.
Also adds a companion .url file so processes waiting on an active
lock can print the auth URL for the user.
## Summary
Within the scope of the FEDRamp High RM, it is necessary to detect if an user should connect to a FEDRamp colo.
At first, it was considered to add the --fedramp as global flag however this could be a footgun for the user or even an hindrance, thus, the proposal is to save in the token (during login) if the user authenticated using the FEDRamp Dashboard. This solution makes it easier to the user as they will only be required to pass the flag in login and nothing else.
* Introduces the new field, endpoint, in OriginCert
* Refactors login to remove the private key and certificate which are no longer used
* Login will only store the Argo Tunnel Token
* Remove namedTunnelToken as it was only used to for serialization
Closes TUN-8960
- Move packages the provide generic functionality (such as config) from `cmd` subtree to top level.
- Remove all dependencies on `cmd` subtree from top level packages.
- Consolidate all code dealing with token generation and transfer to a single cohesive package.