agentssh's CommandEnv, sftpHandler, and agentproc each resolved the
session working directory on their own and had drifted: sftpHandler used
the configured directory without checking it exists and bypassed the
injected EnvInfoer, while the others stat-checked and fell back to home.
Home and shell lookups could also skip the EnvInfoer seam through the
exported usershell.HomeDir and Get.
Resolve through a single usershell.ResolveWorkingDirectory and confine
host home and shell lookups to usershell, so SSH sessions, the process
API, and tests can no longer diverge and the injected environment is
always honored. This also fixes SFTP landing in a configured directory
that no longer exists.
Refs coder/coder#26099
Builds on top of https://github.com/coder/coder/pull/16623/ and wires up
the ReconnectingPTY server. This does nothing to wire up the web
terminal yet but the added test demonstrates the functionality working.
Other changes:
* Refactors and moves the `SystemEnvInfo` interface to the
`agent/usershell` package to address follow-up from
https://github.com/coder/coder/pull/16623#discussion_r1967580249
* Marks `usershellinfo.Get` as deprecated. Consumers should use the
`EnvInfoer` interface instead.
---------
Co-authored-by: Mathias Fredriksson <mafredri@gmail.com>
Co-authored-by: Danny Kopping <danny@coder.com>
* feat: Add workspace agent for SSH
This adds the initial agent that supports TTY
and execution over SSH. It functions across MacOS,
Windows, and Linux.
This does not handle the coderd interaction yet,
but does setup a simple path forward.
* Fix pty tests on Windows
* Fix log race
* Lock around dial error to fix log output
* Fix context return early
* fix: Leaking yamux session after HTTP handler is closed
Closes#317. We depended on the context canceling the yamux connection,
but this isn't a sync operation. Explicitly calling close ensures the
handler waits for yamux to complete before exit.
* Lock around close return
* Force failure with log
* Fix failed handler
* Upgrade dep
* Fix defer inside loops
* Fix context cancel for HTTP requests
* Fix resize
Mathias Fredriksson