view hg @ 50675:60f9602b413e

clonebundles: add support for inline (streaming) clonebundles

The idea behind inline clonebundles is to send them through
the ssh or https connection to the Mercurial server.
We've been using this specifically for streaming clonebundles,
although it works for 'regular' clonebundles as well
(but is less relevant, since pullbundles exist).

We've had this enabled for around 9 months for a part
of our users.

A few benefits are:
- no need to secure an external system,
  since everything goes through the same Mercurial server
- easier scaling (in our case: no risk of inconsistencies
  between multiple mercurial-server mirrors and nginx clonebundles hosts)

Remaining topics/questions right now:
- The inline clonebundles don't work for https yet.
  This is because httppeer doesn't seem to support sending client
  capabilities.
  I didn't focus on that as my main goal was to get this working
  for ssh.

#!/usr/bin/env python3
#
# mercurial - scalable distributed SCM
#
# Copyright 2005-2007 Olivia Mackall <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

import os
import sys

libdir = '@LIBDIR@'

if libdir != '@' 'LIBDIR' '@':
    if not os.path.isabs(libdir):
        libdir = os.path.join(
            os.path.dirname(os.path.realpath(__file__)), libdir
        )
        libdir = os.path.abspath(libdir)
    sys.path.insert(0, libdir)

# Make `pip install --user ...` packages available to the official Windows
# build.  Most py2 packaging installs directly into the system python
# environment, so no changes are necessary for other platforms.  The Windows
# py2 package uses py2exe, which lacks a `site` module.  Hardcode it according
# to the documentation.
if getattr(sys, 'frozen', None) == 'console_exe':
    vi = sys.version_info
    appdata = os.environ.get('APPDATA')
    if appdata:
        sys.path.append(
            os.path.join(
                appdata,
                'Python',
                'Python%d%d' % (vi[0], vi[1]),
                'site-packages',
            )
        )

try:
    from hgdemandimport import tracing
except ImportError:
    sys.stderr.write(
        "abort: couldn't find mercurial libraries in [%s]\n"
        % ' '.join(sys.path)
    )
    sys.stderr.write("(check your install and PYTHONPATH)\n")
    sys.exit(-1)

with tracing.log('hg script'):
    # enable importing on demand to reduce startup time
    import hgdemandimport

    hgdemandimport.enable()

    from mercurial import dispatch

    dispatch.run()