Writing to stdin for `coder ssh` too early could result in the input
being discarded. To work around this we add a new `ptytest` method
called `ReadRune` that lets us read one character of output. This will
indicate the command is ready to accept input.
It could be one character of the prompt, or of the loading message
waiting for connection to be established.
To ensure ptytest closure always happens the same way, we now define a
new `Close` function on `PTY` and always call the close function instead
of manually closing read/writers.
A few additional log messages have been added as well, to better
understand the shutdown process in case of errors.
There are sporadic flakes in some tests on Windows related to the use of
`ptytest`. Since it's not clear why they fail, this commit adds some
more logging and timeouts to the cleanup methods.
Since we were not failing tests with `require` the error output was
somewhat hidden in the stream of log messages. This change standardizes
`ptytest` logging and failing to improve visibility.
* 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
* Initial agent
* fix: Use buffered reader in peer to fix ShortBuffer
This prevents a io.ErrShortBuffer from occurring when the byte
slice being read is smaller than the chunks sent from the opposite
pipe.
This makes sense for unordered connections, where transmission is
not guarunteed, but does not make sense for TCP-like connections.
We use a bufio.Reader when ordered to ensure data isn't lost.
* SSH server works!
* Start Windows support
* Something works
* Refactor pty package to support Windows spawn
* SSH server now works on Windows
* Fix non-Windows
* Fix Linux PTY render
* FIx linux build tests
* Remove agent and wintest
* Add test for Windows resize
* Fix linting errors
* Add Windows environment variables
* Add strings import
* Add comment for attrs
* Add goleak
* Add require import
