rust-chg: reimplement locator by using async/await and tokio-0.2
connect_spawned() is rewritten from scratch by using std::process. Before,
it would select completion of either connection or server process. New code
could be implemented as such, but it's much simpler to occasionally run
try_wait() to detect server death.
Differential Revision: https://phab.mercurial-scm.org/D8447
rust-chg: reimplement ChgClientExt as ChgClient wrapper
ChgClient is no longer an extension trait because:
a. Client object is not consumed and recreated in future-0.3 world, which
unblocks writing a simple wrapper struct.
b. async fn isn't allowed in trait.
Overall, the API should become simpler.
Differential Revision: https://phab.mercurial-scm.org/D8446
rust-chg: reimplement run_command operation as async function
The crafted state machine is no longer needed thanks to async/await.
The state machine is basically rewritten as follows:
- Ready(..) -> return ..
- PollAgain(..) -> run .. and await
- Err(..) -> return Err(..)
Differential Revision: https://phab.mercurial-scm.org/D8445
rust-chg: reimplement uihandler by using async-trait and tokio-0.2
We no longer have to consume self and arguments.
Differential Revision: https://phab.mercurial-scm.org/D8444
rust-chg: have attach_io() simply take reference of AsRawFd object
We no longer have to deal with the restriction of the Future type.
Before, these file objects couldn't be references and that's the only
reason why we had to make stderr an Option<T>.
This fixes future type deduction issue of stderr = None, where rustc would
complain that T of Option<T> couldn't be deduced.
Differential Revision: https://phab.mercurial-scm.org/D8443
rust-status: check for '.hg' regardless of file type (
issue6300)
'.hg' would show up in `hg status` if were a symlink.
Differential Revision: https://phab.mercurial-scm.org/D8461