rust: move rustfmt.toml to repo root so it can be used by `hg fix`
`hg fix` runs the formatters from the repo root so it doesn't pick up
the `rustfmt.toml` configs we had in each the `hg-core`, `hg-cpython`,
and `rhg` packages, which resulted in warnings about `async fn` not
existing in Rust 2015. This patch moves the `rustfmt.toml` file to the
root so `hg fix` will use it.
By putting the `rustfmt.toml` file in a higher-level directory, it
also applies to the `chg` and `hgcli` packages. That makes
`test-check-rust-format.t` fail, so this patch also applies the new
formatting rules to those packages.
Differential Revision: https://phab.mercurial-scm.org/D9142
#require no-windows
Dummy extension simulating unsafe long running command
$ cat > sleepext.py <<EOF
> import itertools
> import time
>
> from mercurial.i18n import _
> from mercurial import registrar
>
> cmdtable = {}
> command = registrar.command(cmdtable)
>
> @command(b'sleep', [], _(b'TIME'), norepo=True)
> def sleep(ui, sleeptime=b"1", **opts):
> with ui.uninterruptible():
> for _i in itertools.repeat(None, int(sleeptime)):
> time.sleep(1)
> ui.warn(b"end of unsafe operation\n")
> ui.warn(b"%s second(s) passed\n" % sleeptime)
> EOF
Kludge to emulate timeout(1) which is not generally available.
$ cat > timeout.py <<EOF
> from __future__ import print_function
> import argparse
> import signal
> import subprocess
> import sys
> import time
>
> ap = argparse.ArgumentParser()
> ap.add_argument('-s', nargs=1, default='SIGTERM')
> ap.add_argument('duration', nargs=1, type=int)
> ap.add_argument('argv', nargs='*')
> opts = ap.parse_args()
> try:
> sig = int(opts.s[0])
> except ValueError:
> sname = opts.s[0]
> if not sname.startswith('SIG'):
> sname = 'SIG' + sname
> sig = getattr(signal, sname)
> proc = subprocess.Popen(opts.argv)
> time.sleep(opts.duration[0])
> proc.poll()
> if proc.returncode is None:
> proc.send_signal(sig)
> proc.wait()
> sys.exit(124)
> EOF
Set up repository
$ hg init repo
$ cd repo
$ cat >> $HGRCPATH << EOF
> [extensions]
> sleepext = ../sleepext.py
> EOF
Test ctrl-c
$ python $TESTTMP/timeout.py -s INT 1 hg sleep 2
interrupted!
[124]
$ cat >> $HGRCPATH << EOF
> [experimental]
> nointerrupt = yes
> EOF
$ python $TESTTMP/timeout.py -s INT 1 hg sleep 2
interrupted!
[124]
$ cat >> $HGRCPATH << EOF
> [experimental]
> nointerrupt-interactiveonly = False
> EOF
$ python $TESTTMP/timeout.py -s INT 1 hg sleep 2
shutting down cleanly
press ^C again to terminate immediately (dangerous)
end of unsafe operation
interrupted!
[124]