subrepo: print the status line before creating the peer for better diagnostics
I ran into a problem where I tried updating to a different branch, and the
process appeared to hang. It turned out that the subrepo revision wasn't
available locally, and I must have originally cloned it from an `hg serve -S` on
a machine that currently wasn't serving anything. It took 2+ minutes to
timeout, and didn't mention what it was connecting to even then.
There are a couple of other issues in this scenario too.
- The repo is dirty after the failed checkout because the top level repo is
updated first. We should probably make 2 passes- top down to pull
everything needed, and then do an update once everything is in place.
- Something must be reading .hgsubstate from wdir because if the same merge
command is run after the timeout, a prompt is issued that the local and
remote subrepo diverged, instead of hanging. But it lists the local version
and remote version as having the same hash.
#!/usr/bin/env python
# Undump a dump from dumprevlog
# $ hg init
# $ undumprevlog < repo.dump
from __future__ import absolute_import, print_function
import sys
from mercurial import (
encoding,
node,
pycompat,
revlog,
transaction,
vfs as vfsmod,
)
from mercurial.utils import (
procutil,
)
for fp in (sys.stdin, sys.stdout, sys.stderr):
procutil.setbinary(fp)
opener = vfsmod.vfs(b'.', False)
tr = transaction.transaction(sys.stderr.write, opener, {b'store': opener},
b"undump.journal")
while True:
l = sys.stdin.readline()
if not l:
break
if l.startswith("file:"):
f = encoding.strtolocal(l[6:-1])
r = revlog.revlog(opener, f)
pycompat.stdout.write(b'%s\n' % f)
elif l.startswith("node:"):
n = node.bin(l[6:-1])
elif l.startswith("linkrev:"):
lr = int(l[9:-1])
elif l.startswith("parents:"):
p = l[9:-1].split()
p1 = node.bin(p[0])
p2 = node.bin(p[1])
elif l.startswith("length:"):
length = int(l[8:-1])
sys.stdin.readline() # start marker
d = encoding.strtolocal(sys.stdin.read(length))
sys.stdin.readline() # end marker
r.addrevision(d, tr, lr, p1, p2)
tr.close()