revlog: return 0 for the fast_rank of nullrev
By convention, the rank of the null revision is 0. This particular revision is
never "physically" stored in the changelog, so it is a special case.
For consistency, the value `None` is still being returned for revlogs which do
not store the fast_rank property for any revision.
Differential Revision: https://phab.mercurial-scm.org/D12208
#require no-windows no-rhg
XXX-RHG this test hangs if `hg` is really `rhg`. This was hidden by the use of
`alias hg=rhg` by run-tests.py. With such alias removed, this test is revealed
buggy. This need to be resolved sooner than later.
Dummy extension simulating unsafe long running command
$ SYNC_FILE="$TESTTMP/sync-file"
$ export SYNC_FILE
$ DONE_FILE="$TESTTMP/done-file"
$ export DONE_FILE
$
$ cat > wait_ext.py <<EOF
> import os
> import time
>
> from mercurial.i18n import _
> from mercurial import registrar
> from mercurial import testing
>
> cmdtable = {}
> command = registrar.command(cmdtable)
>
> @command(b'wait-signal', [], _(b'SYNC_FILE DONE_FILE'), norepo=True)
> def sleep(ui, sync_file=b"$SYNC_FILE", done_file=b"$DONE_FILE", **opts):
> start = time.time()
> with ui.uninterruptible():
> testing.write_file(sync_file, b'%d' % os.getpid())
> testing.wait_file(done_file)
> # make sure we get rescheduled and the signal get a chance to be handled
> time.sleep(0.1)
> ui.warn(b"end of unsafe operation\n")
> ui.warn(b"%d second(s) passed\n" % int(time.time() - start))
> EOF
$ cat > send-signal.sh << EOF
> #!/bin/sh
> SIG=\$1
> if [ -z "\$SIG" ]; then
> echo "send-signal.sh requires one argument" >&2
> exit 1
> fi
> "$RUNTESTDIR/testlib/wait-on-file" 10 "$SYNC_FILE" || exit 2
> kill -s \$SIG \`cat "$SYNC_FILE"\`
> sleep 1
> touch "$DONE_FILE"
> EOF
#if no-windows
$ chmod +x send-signal.sh
#endif
Kludge to emulate timeout(1) which is not generally available.
Set up repository
$ hg init repo
$ cd repo
$ cat >> $HGRCPATH << EOF
> [extensions]
> wait_ext = $TESTTMP/wait_ext.py
> EOF
Test ctrl-c
$ rm -f $SYNC_FILE $DONE_FILE
$ sh -c "../send-signal.sh INT" &
$ hg wait-signal
interrupted!
[255]
$ cat >> $HGRCPATH << EOF
> [experimental]
> nointerrupt = yes
> EOF
$ rm -f $SYNC_FILE $DONE_FILE
$ sh -c "../send-signal.sh INT" &
$ hg wait-signal
interrupted!
[255]
$ cat >> $HGRCPATH << EOF
> [experimental]
> nointerrupt-interactiveonly = False
> EOF
$ rm -f $SYNC_FILE $DONE_FILE
$ sh -c "../send-signal.sh INT" &
$ hg wait-signal
shutting down cleanly
press ^C again to terminate immediately (dangerous)
end of unsafe operation
interrupted!
[255]