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# bundle2.py - generic container format to transmit arbitrary data.
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#
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# Copyright 2013 Facebook, Inc.
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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"""Handling of the new bundle2 format
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The goal of bundle2 is to act as an atomically packet to transmit a set of
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payloads in an application agnostic way. It consist in a sequence of "parts"
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that will be handed to and processed by the application layer.
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General format architecture
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===========================
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The format is architectured as follow
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- magic string
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- stream level parameters
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- payload parts (any number)
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- end of stream marker.
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the Binary format
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============================
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All numbers are unsigned and big-endian.
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stream level parameters
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------------------------
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Binary format is as follow
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:params size: int32
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The total number of Bytes used by the parameters
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:params value: arbitrary number of Bytes
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A blob of `params size` containing the serialized version of all stream level
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parameters.
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The blob contains a space separated list of parameters. Parameters with value
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are stored in the form `<name>=<value>`. Both name and value are urlquoted.
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Empty name are obviously forbidden.
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Name MUST start with a letter. If this first letter is lower case, the
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parameter is advisory and can be safely ignored. However when the first
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letter is capital, the parameter is mandatory and the bundling process MUST
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stop if he is not able to proceed it.
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Stream parameters use a simple textual format for two main reasons:
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- Stream level parameters should remain simple and we want to discourage any
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crazy usage.
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- Textual data allow easy human inspection of a bundle2 header in case of
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troubles.
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Any Applicative level options MUST go into a bundle2 part instead.
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Payload part
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------------------------
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Binary format is as follow
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:header size: int32
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The total number of Bytes used by the part header. When the header is empty
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(size = 0) this is interpreted as the end of stream marker.
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:header:
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The header defines how to interpret the part. It contains two piece of
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data: the part type, and the part parameters.
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The part type is used to route an application level handler, that can
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interpret payload.
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Part parameters are passed to the application level handler. They are
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meant to convey information that will help the application level object to
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interpret the part payload.
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The binary format of the header is has follow
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:typesize: (one byte)
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:parttype: alphanumerical part name (restricted to [a-zA-Z0-9_:-]*)
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:partid: A 32bits integer (unique in the bundle) that can be used to refer
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to this part.
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:parameters:
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Part's parameter may have arbitrary content, the binary structure is::
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<mandatory-count><advisory-count><param-sizes><param-data>
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:mandatory-count: 1 byte, number of mandatory parameters
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:advisory-count: 1 byte, number of advisory parameters
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:param-sizes:
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N couple of bytes, where N is the total number of parameters. Each
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couple contains (<size-of-key>, <size-of-value) for one parameter.
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:param-data:
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A blob of bytes from which each parameter key and value can be
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retrieved using the list of size couples stored in the previous
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field.
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Mandatory parameters comes first, then the advisory ones.
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Each parameter's key MUST be unique within the part.
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:payload:
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payload is a series of `<chunksize><chunkdata>`.
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`chunksize` is an int32, `chunkdata` are plain bytes (as much as
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`chunksize` says)` The payload part is concluded by a zero size chunk.
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The current implementation always produces either zero or one chunk.
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This is an implementation limitation that will ultimately be lifted.
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`chunksize` can be negative to trigger special case processing. No such
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processing is in place yet.
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Bundle processing
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============================
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Each part is processed in order using a "part handler". Handler are registered
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for a certain part type.
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The matching of a part to its handler is case insensitive. The case of the
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part type is used to know if a part is mandatory or advisory. If the Part type
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contains any uppercase char it is considered mandatory. When no handler is
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known for a Mandatory part, the process is aborted and an exception is raised.
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If the part is advisory and no handler is known, the part is ignored. When the
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process is aborted, the full bundle is still read from the stream to keep the
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channel usable. But none of the part read from an abort are processed. In the
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future, dropping the stream may become an option for channel we do not care to
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preserve.
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"""
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from __future__ import absolute_import
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import errno
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import re
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import string
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import struct
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import sys
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from .i18n import _
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from . import (
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changegroup,
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error,
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obsolete,
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pushkey,
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pycompat,
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tags,
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url,
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util,
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)
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urlerr = util.urlerr
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urlreq = util.urlreq
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_pack = struct.pack
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_unpack = struct.unpack
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_fstreamparamsize = '>i'
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_fpartheadersize = '>i'
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_fparttypesize = '>B'
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_fpartid = '>I'
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_fpayloadsize = '>i'
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_fpartparamcount = '>BB'
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preferedchunksize = 4096
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_parttypeforbidden = re.compile('[^a-zA-Z0-9_:-]')
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def outdebug(ui, message):
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"""debug regarding output stream (bundling)"""
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if ui.configbool('devel', 'bundle2.debug', False):
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ui.debug('bundle2-output: %s\n' % message)
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def indebug(ui, message):
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"""debug on input stream (unbundling)"""
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if ui.configbool('devel', 'bundle2.debug', False):
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ui.debug('bundle2-input: %s\n' % message)
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def validateparttype(parttype):
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"""raise ValueError if a parttype contains invalid character"""
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if _parttypeforbidden.search(parttype):
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raise ValueError(parttype)
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def _makefpartparamsizes(nbparams):
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"""return a struct format to read part parameter sizes
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The number parameters is variable so we need to build that format
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dynamically.
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"""
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return '>'+('BB'*nbparams)
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parthandlermapping = {}
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def parthandler(parttype, params=()):
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"""decorator that register a function as a bundle2 part handler
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eg::
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@parthandler('myparttype', ('mandatory', 'param', 'handled'))
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def myparttypehandler(...):
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'''process a part of type "my part".'''
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...
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"""
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validateparttype(parttype)
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def _decorator(func):
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lparttype = parttype.lower() # enforce lower case matching.
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assert lparttype not in parthandlermapping
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parthandlermapping[lparttype] = func
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func.params = frozenset(params)
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return func
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return _decorator
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class unbundlerecords(object):
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"""keep record of what happens during and unbundle
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New records are added using `records.add('cat', obj)`. Where 'cat' is a
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category of record and obj is an arbitrary object.
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`records['cat']` will return all entries of this category 'cat'.
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Iterating on the object itself will yield `('category', obj)` tuples
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for all entries.
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All iterations happens in chronological order.
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"""
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def __init__(self):
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self._categories = {}
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self._sequences = []
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self._replies = {}
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def add(self, category, entry, inreplyto=None):
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"""add a new record of a given category.
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The entry can then be retrieved in the list returned by
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self['category']."""
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self._categories.setdefault(category, []).append(entry)
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self._sequences.append((category, entry))
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if inreplyto is not None:
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self.getreplies(inreplyto).add(category, entry)
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def getreplies(self, partid):
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"""get the records that are replies to a specific part"""
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return self._replies.setdefault(partid, unbundlerecords())
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def __getitem__(self, cat):
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return tuple(self._categories.get(cat, ()))
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def __iter__(self):
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return iter(self._sequences)
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def __len__(self):
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return len(self._sequences)
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def __nonzero__(self):
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return bool(self._sequences)
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__bool__ = __nonzero__
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class bundleoperation(object):
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"""an object that represents a single bundling process
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Its purpose is to carry unbundle-related objects and states.
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A new object should be created at the beginning of each bundle processing.
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The object is to be returned by the processing function.
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The object has very little content now it will ultimately contain:
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* an access to the repo the bundle is applied to,
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* a ui object,
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* a way to retrieve a transaction to add changes to the repo,
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* a way to record the result of processing each part,
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* a way to construct a bundle response when applicable.
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"""
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def __init__(self, repo, transactiongetter, captureoutput=True):
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self.repo = repo
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self.ui = repo.ui
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self.records = unbundlerecords()
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self.gettransaction = transactiongetter
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self.reply = None
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self.captureoutput = captureoutput
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class TransactionUnavailable(RuntimeError):
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pass
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def _notransaction():
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"""default method to get a transaction while processing a bundle
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Raise an exception to highlight the fact that no transaction was expected
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to be created"""
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raise TransactionUnavailable()
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def applybundle(repo, unbundler, tr, source=None, url=None, op=None):
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# transform me into unbundler.apply() as soon as the freeze is lifted
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tr.hookargs['bundle2'] = '1'
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if source is not None and 'source' not in tr.hookargs:
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tr.hookargs['source'] = source
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if url is not None and 'url' not in tr.hookargs:
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tr.hookargs['url'] = url
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return processbundle(repo, unbundler, lambda: tr, op=op)
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def processbundle(repo, unbundler, transactiongetter=None, op=None):
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"""This function process a bundle, apply effect to/from a repo
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It iterates over each part then searches for and uses the proper handling
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code to process the part. Parts are processed in order.
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Unknown Mandatory part will abort the process.
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It is temporarily possible to provide a prebuilt bundleoperation to the
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function. This is used to ensure output is properly propagated in case of
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an error during the unbundling. This output capturing part will likely be
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reworked and this ability will probably go away in the process.
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"""
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if op is None:
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if transactiongetter is None:
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transactiongetter = _notransaction
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op = bundleoperation(repo, transactiongetter)
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# todo:
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# - replace this is a init function soon.
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# - exception catching
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unbundler.params
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if repo.ui.debugflag:
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msg = ['bundle2-input-bundle:']
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if unbundler.params:
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msg.append(' %i params')
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if op.gettransaction is None or op.gettransaction is _notransaction:
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msg.append(' no-transaction')
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else:
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msg.append(' with-transaction')
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msg.append('\n')
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repo.ui.debug(''.join(msg))
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iterparts = enumerate(unbundler.iterparts())
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part = None
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nbpart = 0
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try:
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for nbpart, part in iterparts:
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_processpart(op, part)
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except Exception as exc:
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# Any exceptions seeking to the end of the bundle at this point are
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# almost certainly related to the underlying stream being bad.
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# And, chances are that the exception we're handling is related to
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# getting in that bad state. So, we swallow the seeking error and
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# re-raise the original error.
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seekerror = False
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try:
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for nbpart, part in iterparts:
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# consume the bundle content
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part.seek(0, 2)
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except Exception:
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seekerror = True
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# Small hack to let caller code distinguish exceptions from bundle2
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# processing from processing the old format. This is mostly
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# needed to handle different return codes to unbundle according to the
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# type of bundle. We should probably clean up or drop this return code
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# craziness in a future version.
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exc.duringunbundle2 = True
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salvaged = []
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replycaps = None
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if op.reply is not None:
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salvaged = op.reply.salvageoutput()
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replycaps = op.reply.capabilities
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exc._replycaps = replycaps
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exc._bundle2salvagedoutput = salvaged
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# Re-raising from a variable loses the original stack. So only use
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# that form if we need to.
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if seekerror:
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raise exc
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else:
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raise
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finally:
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repo.ui.debug('bundle2-input-bundle: %i parts total\n' % nbpart)
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return op
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def _processpart(op, part):
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"""process a single part from a bundle
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The part is guaranteed to have been fully consumed when the function exits
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(even if an exception is raised)."""
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status = 'unknown' # used by debug output
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hardabort = False
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try:
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try:
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handler = parthandlermapping.get(part.type)
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if handler is None:
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status = 'unsupported-type'
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raise error.BundleUnknownFeatureError(parttype=part.type)
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indebug(op.ui, 'found a handler for part %r' % part.type)
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unknownparams = part.mandatorykeys - handler.params
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if unknownparams:
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unknownparams = list(unknownparams)
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unknownparams.sort()
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status = 'unsupported-params (%s)' % unknownparams
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raise error.BundleUnknownFeatureError(parttype=part.type,
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params=unknownparams)
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status = 'supported'
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except error.BundleUnknownFeatureError as exc:
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if part.mandatory: # mandatory parts
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raise
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indebug(op.ui, 'ignoring unsupported advisory part %s' % exc)
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return # skip to part processing
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finally:
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if op.ui.debugflag:
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msg = ['bundle2-input-part: "%s"' % part.type]
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if not part.mandatory:
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msg.append(' (advisory)')
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nbmp = len(part.mandatorykeys)
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nbap = len(part.params) - nbmp
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if nbmp or nbap:
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msg.append(' (params:')
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if nbmp:
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msg.append(' %i mandatory' % nbmp)
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if nbap:
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msg.append(' %i advisory' % nbmp)
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msg.append(')')
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msg.append(' %s\n' % status)
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op.ui.debug(''.join(msg))
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# handler is called outside the above try block so that we don't
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# risk catching KeyErrors from anything other than the
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# parthandlermapping lookup (any KeyError raised by handler()
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# itself represents a defect of a different variety).
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output = None
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if op.captureoutput and op.reply is not None:
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op.ui.pushbuffer(error=True, subproc=True)
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output = ''
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try:
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handler(op, part)
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finally:
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if output is not None:
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output = op.ui.popbuffer()
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if output:
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outpart = op.reply.newpart('output', data=output,
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mandatory=False)
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outpart.addparam('in-reply-to', str(part.id), mandatory=False)
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# If exiting or interrupted, do not attempt to seek the stream in the
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# finally block below. This makes abort faster.
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except (SystemExit, KeyboardInterrupt):
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hardabort = True
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raise
|
|
|
finally:
|
|
|
# consume the part content to not corrupt the stream.
|
|
|
if not hardabort:
|
|
|
part.seek(0, 2)
|
|
|
|
|
|
|
|
|
def decodecaps(blob):
|
|
|
"""decode a bundle2 caps bytes blob into a dictionary
|
|
|
|
|
|
The blob is a list of capabilities (one per line)
|
|
|
Capabilities may have values using a line of the form::
|
|
|
|
|
|
capability=value1,value2,value3
|
|
|
|
|
|
The values are always a list."""
|
|
|
caps = {}
|
|
|
for line in blob.splitlines():
|
|
|
if not line:
|
|
|
continue
|
|
|
if '=' not in line:
|
|
|
key, vals = line, ()
|
|
|
else:
|
|
|
key, vals = line.split('=', 1)
|
|
|
vals = vals.split(',')
|
|
|
key = urlreq.unquote(key)
|
|
|
vals = [urlreq.unquote(v) for v in vals]
|
|
|
caps[key] = vals
|
|
|
return caps
|
|
|
|
|
|
def encodecaps(caps):
|
|
|
"""encode a bundle2 caps dictionary into a bytes blob"""
|
|
|
chunks = []
|
|
|
for ca in sorted(caps):
|
|
|
vals = caps[ca]
|
|
|
ca = urlreq.quote(ca)
|
|
|
vals = [urlreq.quote(v) for v in vals]
|
|
|
if vals:
|
|
|
ca = "%s=%s" % (ca, ','.join(vals))
|
|
|
chunks.append(ca)
|
|
|
return '\n'.join(chunks)
|
|
|
|
|
|
bundletypes = {
|
|
|
"": ("", 'UN'), # only when using unbundle on ssh and old http servers
|
|
|
# since the unification ssh accepts a header but there
|
|
|
# is no capability signaling it.
|
|
|
"HG20": (), # special-cased below
|
|
|
"HG10UN": ("HG10UN", 'UN'),
|
|
|
"HG10BZ": ("HG10", 'BZ'),
|
|
|
"HG10GZ": ("HG10GZ", 'GZ'),
|
|
|
}
|
|
|
|
|
|
# hgweb uses this list to communicate its preferred type
|
|
|
bundlepriority = ['HG10GZ', 'HG10BZ', 'HG10UN']
|
|
|
|
|
|
class bundle20(object):
|
|
|
"""represent an outgoing bundle2 container
|
|
|
|
|
|
Use the `addparam` method to add stream level parameter. and `newpart` to
|
|
|
populate it. Then call `getchunks` to retrieve all the binary chunks of
|
|
|
data that compose the bundle2 container."""
|
|
|
|
|
|
_magicstring = 'HG20'
|
|
|
|
|
|
def __init__(self, ui, capabilities=()):
|
|
|
self.ui = ui
|
|
|
self._params = []
|
|
|
self._parts = []
|
|
|
self.capabilities = dict(capabilities)
|
|
|
self._compengine = util.compengines.forbundletype('UN')
|
|
|
self._compopts = None
|
|
|
|
|
|
def setcompression(self, alg, compopts=None):
|
|
|
"""setup core part compression to <alg>"""
|
|
|
if alg in (None, 'UN'):
|
|
|
return
|
|
|
assert not any(n.lower() == 'compression' for n, v in self._params)
|
|
|
self.addparam('Compression', alg)
|
|
|
self._compengine = util.compengines.forbundletype(alg)
|
|
|
self._compopts = compopts
|
|
|
|
|
|
@property
|
|
|
def nbparts(self):
|
|
|
"""total number of parts added to the bundler"""
|
|
|
return len(self._parts)
|
|
|
|
|
|
# methods used to defines the bundle2 content
|
|
|
def addparam(self, name, value=None):
|
|
|
"""add a stream level parameter"""
|
|
|
if not name:
|
|
|
raise ValueError('empty parameter name')
|
|
|
if name[0] not in string.letters:
|
|
|
raise ValueError('non letter first character: %r' % name)
|
|
|
self._params.append((name, value))
|
|
|
|
|
|
def addpart(self, part):
|
|
|
"""add a new part to the bundle2 container
|
|
|
|
|
|
Parts contains the actual applicative payload."""
|
|
|
assert part.id is None
|
|
|
part.id = len(self._parts) # very cheap counter
|
|
|
self._parts.append(part)
|
|
|
|
|
|
def newpart(self, typeid, *args, **kwargs):
|
|
|
"""create a new part and add it to the containers
|
|
|
|
|
|
As the part is directly added to the containers. For now, this means
|
|
|
that any failure to properly initialize the part after calling
|
|
|
``newpart`` should result in a failure of the whole bundling process.
|
|
|
|
|
|
You can still fall back to manually create and add if you need better
|
|
|
control."""
|
|
|
part = bundlepart(typeid, *args, **kwargs)
|
|
|
self.addpart(part)
|
|
|
return part
|
|
|
|
|
|
# methods used to generate the bundle2 stream
|
|
|
def getchunks(self):
|
|
|
if self.ui.debugflag:
|
|
|
msg = ['bundle2-output-bundle: "%s",' % self._magicstring]
|
|
|
if self._params:
|
|
|
msg.append(' (%i params)' % len(self._params))
|
|
|
msg.append(' %i parts total\n' % len(self._parts))
|
|
|
self.ui.debug(''.join(msg))
|
|
|
outdebug(self.ui, 'start emission of %s stream' % self._magicstring)
|
|
|
yield self._magicstring
|
|
|
param = self._paramchunk()
|
|
|
outdebug(self.ui, 'bundle parameter: %s' % param)
|
|
|
yield _pack(_fstreamparamsize, len(param))
|
|
|
if param:
|
|
|
yield param
|
|
|
for chunk in self._compengine.compressstream(self._getcorechunk(),
|
|
|
self._compopts):
|
|
|
yield chunk
|
|
|
|
|
|
def _paramchunk(self):
|
|
|
"""return a encoded version of all stream parameters"""
|
|
|
blocks = []
|
|
|
for par, value in self._params:
|
|
|
par = urlreq.quote(par)
|
|
|
if value is not None:
|
|
|
value = urlreq.quote(value)
|
|
|
par = '%s=%s' % (par, value)
|
|
|
blocks.append(par)
|
|
|
return ' '.join(blocks)
|
|
|
|
|
|
def _getcorechunk(self):
|
|
|
"""yield chunk for the core part of the bundle
|
|
|
|
|
|
(all but headers and parameters)"""
|
|
|
outdebug(self.ui, 'start of parts')
|
|
|
for part in self._parts:
|
|
|
outdebug(self.ui, 'bundle part: "%s"' % part.type)
|
|
|
for chunk in part.getchunks(ui=self.ui):
|
|
|
yield chunk
|
|
|
outdebug(self.ui, 'end of bundle')
|
|
|
yield _pack(_fpartheadersize, 0)
|
|
|
|
|
|
|
|
|
def salvageoutput(self):
|
|
|
"""return a list with a copy of all output parts in the bundle
|
|
|
|
|
|
This is meant to be used during error handling to make sure we preserve
|
|
|
server output"""
|
|
|
salvaged = []
|
|
|
for part in self._parts:
|
|
|
if part.type.startswith('output'):
|
|
|
salvaged.append(part.copy())
|
|
|
return salvaged
|
|
|
|
|
|
|
|
|
class unpackermixin(object):
|
|
|
"""A mixin to extract bytes and struct data from a stream"""
|
|
|
|
|
|
def __init__(self, fp):
|
|
|
self._fp = fp
|
|
|
|
|
|
def _unpack(self, format):
|
|
|
"""unpack this struct format from the stream
|
|
|
|
|
|
This method is meant for internal usage by the bundle2 protocol only.
|
|
|
They directly manipulate the low level stream including bundle2 level
|
|
|
instruction.
|
|
|
|
|
|
Do not use it to implement higher-level logic or methods."""
|
|
|
data = self._readexact(struct.calcsize(format))
|
|
|
return _unpack(format, data)
|
|
|
|
|
|
def _readexact(self, size):
|
|
|
"""read exactly <size> bytes from the stream
|
|
|
|
|
|
This method is meant for internal usage by the bundle2 protocol only.
|
|
|
They directly manipulate the low level stream including bundle2 level
|
|
|
instruction.
|
|
|
|
|
|
Do not use it to implement higher-level logic or methods."""
|
|
|
return changegroup.readexactly(self._fp, size)
|
|
|
|
|
|
def getunbundler(ui, fp, magicstring=None):
|
|
|
"""return a valid unbundler object for a given magicstring"""
|
|
|
if magicstring is None:
|
|
|
magicstring = changegroup.readexactly(fp, 4)
|
|
|
magic, version = magicstring[0:2], magicstring[2:4]
|
|
|
if magic != 'HG':
|
|
|
raise error.Abort(_('not a Mercurial bundle'))
|
|
|
unbundlerclass = formatmap.get(version)
|
|
|
if unbundlerclass is None:
|
|
|
raise error.Abort(_('unknown bundle version %s') % version)
|
|
|
unbundler = unbundlerclass(ui, fp)
|
|
|
indebug(ui, 'start processing of %s stream' % magicstring)
|
|
|
return unbundler
|
|
|
|
|
|
class unbundle20(unpackermixin):
|
|
|
"""interpret a bundle2 stream
|
|
|
|
|
|
This class is fed with a binary stream and yields parts through its
|
|
|
`iterparts` methods."""
|
|
|
|
|
|
_magicstring = 'HG20'
|
|
|
|
|
|
def __init__(self, ui, fp):
|
|
|
"""If header is specified, we do not read it out of the stream."""
|
|
|
self.ui = ui
|
|
|
self._compengine = util.compengines.forbundletype('UN')
|
|
|
self._compressed = None
|
|
|
super(unbundle20, self).__init__(fp)
|
|
|
|
|
|
@util.propertycache
|
|
|
def params(self):
|
|
|
"""dictionary of stream level parameters"""
|
|
|
indebug(self.ui, 'reading bundle2 stream parameters')
|
|
|
params = {}
|
|
|
paramssize = self._unpack(_fstreamparamsize)[0]
|
|
|
if paramssize < 0:
|
|
|
raise error.BundleValueError('negative bundle param size: %i'
|
|
|
% paramssize)
|
|
|
if paramssize:
|
|
|
params = self._readexact(paramssize)
|
|
|
params = self._processallparams(params)
|
|
|
return params
|
|
|
|
|
|
def _processallparams(self, paramsblock):
|
|
|
""""""
|
|
|
params = util.sortdict()
|
|
|
for p in paramsblock.split(' '):
|
|
|
p = p.split('=', 1)
|
|
|
p = [urlreq.unquote(i) for i in p]
|
|
|
if len(p) < 2:
|
|
|
p.append(None)
|
|
|
self._processparam(*p)
|
|
|
params[p[0]] = p[1]
|
|
|
return params
|
|
|
|
|
|
|
|
|
def _processparam(self, name, value):
|
|
|
"""process a parameter, applying its effect if needed
|
|
|
|
|
|
Parameter starting with a lower case letter are advisory and will be
|
|
|
ignored when unknown. Those starting with an upper case letter are
|
|
|
mandatory and will this function will raise a KeyError when unknown.
|
|
|
|
|
|
Note: no option are currently supported. Any input will be either
|
|
|
ignored or failing.
|
|
|
"""
|
|
|
if not name:
|
|
|
raise ValueError('empty parameter name')
|
|
|
if name[0] not in string.letters:
|
|
|
raise ValueError('non letter first character: %r' % name)
|
|
|
try:
|
|
|
handler = b2streamparamsmap[name.lower()]
|
|
|
except KeyError:
|
|
|
if name[0].islower():
|
|
|
indebug(self.ui, "ignoring unknown parameter %r" % name)
|
|
|
else:
|
|
|
raise error.BundleUnknownFeatureError(params=(name,))
|
|
|
else:
|
|
|
handler(self, name, value)
|
|
|
|
|
|
def _forwardchunks(self):
|
|
|
"""utility to transfer a bundle2 as binary
|
|
|
|
|
|
This is made necessary by the fact the 'getbundle' command over 'ssh'
|
|
|
have no way to know then the reply end, relying on the bundle to be
|
|
|
interpreted to know its end. This is terrible and we are sorry, but we
|
|
|
needed to move forward to get general delta enabled.
|
|
|
"""
|
|
|
yield self._magicstring
|
|
|
assert 'params' not in vars(self)
|
|
|
paramssize = self._unpack(_fstreamparamsize)[0]
|
|
|
if paramssize < 0:
|
|
|
raise error.BundleValueError('negative bundle param size: %i'
|
|
|
% paramssize)
|
|
|
yield _pack(_fstreamparamsize, paramssize)
|
|
|
if paramssize:
|
|
|
params = self._readexact(paramssize)
|
|
|
self._processallparams(params)
|
|
|
yield params
|
|
|
assert self._compengine.bundletype == 'UN'
|
|
|
# From there, payload might need to be decompressed
|
|
|
self._fp = self._compengine.decompressorreader(self._fp)
|
|
|
emptycount = 0
|
|
|
while emptycount < 2:
|
|
|
# so we can brainlessly loop
|
|
|
assert _fpartheadersize == _fpayloadsize
|
|
|
size = self._unpack(_fpartheadersize)[0]
|
|
|
yield _pack(_fpartheadersize, size)
|
|
|
if size:
|
|
|
emptycount = 0
|
|
|
else:
|
|
|
emptycount += 1
|
|
|
continue
|
|
|
if size == flaginterrupt:
|
|
|
continue
|
|
|
elif size < 0:
|
|
|
raise error.BundleValueError('negative chunk size: %i')
|
|
|
yield self._readexact(size)
|
|
|
|
|
|
|
|
|
def iterparts(self):
|
|
|
"""yield all parts contained in the stream"""
|
|
|
# make sure param have been loaded
|
|
|
self.params
|
|
|
# From there, payload need to be decompressed
|
|
|
self._fp = self._compengine.decompressorreader(self._fp)
|
|
|
indebug(self.ui, 'start extraction of bundle2 parts')
|
|
|
headerblock = self._readpartheader()
|
|
|
while headerblock is not None:
|
|
|
part = unbundlepart(self.ui, headerblock, self._fp)
|
|
|
yield part
|
|
|
part.seek(0, 2)
|
|
|
headerblock = self._readpartheader()
|
|
|
indebug(self.ui, 'end of bundle2 stream')
|
|
|
|
|
|
def _readpartheader(self):
|
|
|
"""reads a part header size and return the bytes blob
|
|
|
|
|
|
returns None if empty"""
|
|
|
headersize = self._unpack(_fpartheadersize)[0]
|
|
|
if headersize < 0:
|
|
|
raise error.BundleValueError('negative part header size: %i'
|
|
|
% headersize)
|
|
|
indebug(self.ui, 'part header size: %i' % headersize)
|
|
|
if headersize:
|
|
|
return self._readexact(headersize)
|
|
|
return None
|
|
|
|
|
|
def compressed(self):
|
|
|
self.params # load params
|
|
|
return self._compressed
|
|
|
|
|
|
def close(self):
|
|
|
"""close underlying file"""
|
|
|
if util.safehasattr(self._fp, 'close'):
|
|
|
return self._fp.close()
|
|
|
|
|
|
formatmap = {'20': unbundle20}
|
|
|
|
|
|
b2streamparamsmap = {}
|
|
|
|
|
|
def b2streamparamhandler(name):
|
|
|
"""register a handler for a stream level parameter"""
|
|
|
def decorator(func):
|
|
|
assert name not in formatmap
|
|
|
b2streamparamsmap[name] = func
|
|
|
return func
|
|
|
return decorator
|
|
|
|
|
|
@b2streamparamhandler('compression')
|
|
|
def processcompression(unbundler, param, value):
|
|
|
"""read compression parameter and install payload decompression"""
|
|
|
if value not in util.compengines.supportedbundletypes:
|
|
|
raise error.BundleUnknownFeatureError(params=(param,),
|
|
|
values=(value,))
|
|
|
unbundler._compengine = util.compengines.forbundletype(value)
|
|
|
if value is not None:
|
|
|
unbundler._compressed = True
|
|
|
|
|
|
class bundlepart(object):
|
|
|
"""A bundle2 part contains application level payload
|
|
|
|
|
|
The part `type` is used to route the part to the application level
|
|
|
handler.
|
|
|
|
|
|
The part payload is contained in ``part.data``. It could be raw bytes or a
|
|
|
generator of byte chunks.
|
|
|
|
|
|
You can add parameters to the part using the ``addparam`` method.
|
|
|
Parameters can be either mandatory (default) or advisory. Remote side
|
|
|
should be able to safely ignore the advisory ones.
|
|
|
|
|
|
Both data and parameters cannot be modified after the generation has begun.
|
|
|
"""
|
|
|
|
|
|
def __init__(self, parttype, mandatoryparams=(), advisoryparams=(),
|
|
|
data='', mandatory=True):
|
|
|
validateparttype(parttype)
|
|
|
self.id = None
|
|
|
self.type = parttype
|
|
|
self._data = data
|
|
|
self._mandatoryparams = list(mandatoryparams)
|
|
|
self._advisoryparams = list(advisoryparams)
|
|
|
# checking for duplicated entries
|
|
|
self._seenparams = set()
|
|
|
for pname, __ in self._mandatoryparams + self._advisoryparams:
|
|
|
if pname in self._seenparams:
|
|
|
raise error.ProgrammingError('duplicated params: %s' % pname)
|
|
|
self._seenparams.add(pname)
|
|
|
# status of the part's generation:
|
|
|
# - None: not started,
|
|
|
# - False: currently generated,
|
|
|
# - True: generation done.
|
|
|
self._generated = None
|
|
|
self.mandatory = mandatory
|
|
|
|
|
|
def __repr__(self):
|
|
|
cls = "%s.%s" % (self.__class__.__module__, self.__class__.__name__)
|
|
|
return ('<%s object at %x; id: %s; type: %s; mandatory: %s>'
|
|
|
% (cls, id(self), self.id, self.type, self.mandatory))
|
|
|
|
|
|
def copy(self):
|
|
|
"""return a copy of the part
|
|
|
|
|
|
The new part have the very same content but no partid assigned yet.
|
|
|
Parts with generated data cannot be copied."""
|
|
|
assert not util.safehasattr(self.data, 'next')
|
|
|
return self.__class__(self.type, self._mandatoryparams,
|
|
|
self._advisoryparams, self._data, self.mandatory)
|
|
|
|
|
|
# methods used to defines the part content
|
|
|
@property
|
|
|
def data(self):
|
|
|
return self._data
|
|
|
|
|
|
@data.setter
|
|
|
def data(self, data):
|
|
|
if self._generated is not None:
|
|
|
raise error.ReadOnlyPartError('part is being generated')
|
|
|
self._data = data
|
|
|
|
|
|
@property
|
|
|
def mandatoryparams(self):
|
|
|
# make it an immutable tuple to force people through ``addparam``
|
|
|
return tuple(self._mandatoryparams)
|
|
|
|
|
|
@property
|
|
|
def advisoryparams(self):
|
|
|
# make it an immutable tuple to force people through ``addparam``
|
|
|
return tuple(self._advisoryparams)
|
|
|
|
|
|
def addparam(self, name, value='', mandatory=True):
|
|
|
"""add a parameter to the part
|
|
|
|
|
|
If 'mandatory' is set to True, the remote handler must claim support
|
|
|
for this parameter or the unbundling will be aborted.
|
|
|
|
|
|
The 'name' and 'value' cannot exceed 255 bytes each.
|
|
|
"""
|
|
|
if self._generated is not None:
|
|
|
raise error.ReadOnlyPartError('part is being generated')
|
|
|
if name in self._seenparams:
|
|
|
raise ValueError('duplicated params: %s' % name)
|
|
|
self._seenparams.add(name)
|
|
|
params = self._advisoryparams
|
|
|
if mandatory:
|
|
|
params = self._mandatoryparams
|
|
|
params.append((name, value))
|
|
|
|
|
|
# methods used to generates the bundle2 stream
|
|
|
def getchunks(self, ui):
|
|
|
if self._generated is not None:
|
|
|
raise error.ProgrammingError('part can only be consumed once')
|
|
|
self._generated = False
|
|
|
|
|
|
if ui.debugflag:
|
|
|
msg = ['bundle2-output-part: "%s"' % self.type]
|
|
|
if not self.mandatory:
|
|
|
msg.append(' (advisory)')
|
|
|
nbmp = len(self.mandatoryparams)
|
|
|
nbap = len(self.advisoryparams)
|
|
|
if nbmp or nbap:
|
|
|
msg.append(' (params:')
|
|
|
if nbmp:
|
|
|
msg.append(' %i mandatory' % nbmp)
|
|
|
if nbap:
|
|
|
msg.append(' %i advisory' % nbmp)
|
|
|
msg.append(')')
|
|
|
if not self.data:
|
|
|
msg.append(' empty payload')
|
|
|
elif util.safehasattr(self.data, 'next'):
|
|
|
msg.append(' streamed payload')
|
|
|
else:
|
|
|
msg.append(' %i bytes payload' % len(self.data))
|
|
|
msg.append('\n')
|
|
|
ui.debug(''.join(msg))
|
|
|
|
|
|
#### header
|
|
|
if self.mandatory:
|
|
|
parttype = self.type.upper()
|
|
|
else:
|
|
|
parttype = self.type.lower()
|
|
|
outdebug(ui, 'part %s: "%s"' % (self.id, parttype))
|
|
|
## parttype
|
|
|
header = [_pack(_fparttypesize, len(parttype)),
|
|
|
parttype, _pack(_fpartid, self.id),
|
|
|
]
|
|
|
## parameters
|
|
|
# count
|
|
|
manpar = self.mandatoryparams
|
|
|
advpar = self.advisoryparams
|
|
|
header.append(_pack(_fpartparamcount, len(manpar), len(advpar)))
|
|
|
# size
|
|
|
parsizes = []
|
|
|
for key, value in manpar:
|
|
|
parsizes.append(len(key))
|
|
|
parsizes.append(len(value))
|
|
|
for key, value in advpar:
|
|
|
parsizes.append(len(key))
|
|
|
parsizes.append(len(value))
|
|
|
paramsizes = _pack(_makefpartparamsizes(len(parsizes) / 2), *parsizes)
|
|
|
header.append(paramsizes)
|
|
|
# key, value
|
|
|
for key, value in manpar:
|
|
|
header.append(key)
|
|
|
header.append(value)
|
|
|
for key, value in advpar:
|
|
|
header.append(key)
|
|
|
header.append(value)
|
|
|
## finalize header
|
|
|
headerchunk = ''.join(header)
|
|
|
outdebug(ui, 'header chunk size: %i' % len(headerchunk))
|
|
|
yield _pack(_fpartheadersize, len(headerchunk))
|
|
|
yield headerchunk
|
|
|
## payload
|
|
|
try:
|
|
|
for chunk in self._payloadchunks():
|
|
|
outdebug(ui, 'payload chunk size: %i' % len(chunk))
|
|
|
yield _pack(_fpayloadsize, len(chunk))
|
|
|
yield chunk
|
|
|
except GeneratorExit:
|
|
|
# GeneratorExit means that nobody is listening for our
|
|
|
# results anyway, so just bail quickly rather than trying
|
|
|
# to produce an error part.
|
|
|
ui.debug('bundle2-generatorexit\n')
|
|
|
raise
|
|
|
except BaseException as exc:
|
|
|
# backup exception data for later
|
|
|
ui.debug('bundle2-input-stream-interrupt: encoding exception %s'
|
|
|
% exc)
|
|
|
tb = sys.exc_info()[2]
|
|
|
msg = 'unexpected error: %s' % exc
|
|
|
interpart = bundlepart('error:abort', [('message', msg)],
|
|
|
mandatory=False)
|
|
|
interpart.id = 0
|
|
|
yield _pack(_fpayloadsize, -1)
|
|
|
for chunk in interpart.getchunks(ui=ui):
|
|
|
yield chunk
|
|
|
outdebug(ui, 'closing payload chunk')
|
|
|
# abort current part payload
|
|
|
yield _pack(_fpayloadsize, 0)
|
|
|
pycompat.raisewithtb(exc, tb)
|
|
|
# end of payload
|
|
|
outdebug(ui, 'closing payload chunk')
|
|
|
yield _pack(_fpayloadsize, 0)
|
|
|
self._generated = True
|
|
|
|
|
|
def _payloadchunks(self):
|
|
|
"""yield chunks of a the part payload
|
|
|
|
|
|
Exists to handle the different methods to provide data to a part."""
|
|
|
# we only support fixed size data now.
|
|
|
# This will be improved in the future.
|
|
|
if util.safehasattr(self.data, 'next'):
|
|
|
buff = util.chunkbuffer(self.data)
|
|
|
chunk = buff.read(preferedchunksize)
|
|
|
while chunk:
|
|
|
yield chunk
|
|
|
chunk = buff.read(preferedchunksize)
|
|
|
elif len(self.data):
|
|
|
yield self.data
|
|
|
|
|
|
|
|
|
flaginterrupt = -1
|
|
|
|
|
|
class interrupthandler(unpackermixin):
|
|
|
"""read one part and process it with restricted capability
|
|
|
|
|
|
This allows to transmit exception raised on the producer size during part
|
|
|
iteration while the consumer is reading a part.
|
|
|
|
|
|
Part processed in this manner only have access to a ui object,"""
|
|
|
|
|
|
def __init__(self, ui, fp):
|
|
|
super(interrupthandler, self).__init__(fp)
|
|
|
self.ui = ui
|
|
|
|
|
|
def _readpartheader(self):
|
|
|
"""reads a part header size and return the bytes blob
|
|
|
|
|
|
returns None if empty"""
|
|
|
headersize = self._unpack(_fpartheadersize)[0]
|
|
|
if headersize < 0:
|
|
|
raise error.BundleValueError('negative part header size: %i'
|
|
|
% headersize)
|
|
|
indebug(self.ui, 'part header size: %i\n' % headersize)
|
|
|
if headersize:
|
|
|
return self._readexact(headersize)
|
|
|
return None
|
|
|
|
|
|
def __call__(self):
|
|
|
|
|
|
self.ui.debug('bundle2-input-stream-interrupt:'
|
|
|
' opening out of band context\n')
|
|
|
indebug(self.ui, 'bundle2 stream interruption, looking for a part.')
|
|
|
headerblock = self._readpartheader()
|
|
|
if headerblock is None:
|
|
|
indebug(self.ui, 'no part found during interruption.')
|
|
|
return
|
|
|
part = unbundlepart(self.ui, headerblock, self._fp)
|
|
|
op = interruptoperation(self.ui)
|
|
|
_processpart(op, part)
|
|
|
self.ui.debug('bundle2-input-stream-interrupt:'
|
|
|
' closing out of band context\n')
|
|
|
|
|
|
class interruptoperation(object):
|
|
|
"""A limited operation to be use by part handler during interruption
|
|
|
|
|
|
It only have access to an ui object.
|
|
|
"""
|
|
|
|
|
|
def __init__(self, ui):
|
|
|
self.ui = ui
|
|
|
self.reply = None
|
|
|
self.captureoutput = False
|
|
|
|
|
|
@property
|
|
|
def repo(self):
|
|
|
raise error.ProgrammingError('no repo access from stream interruption')
|
|
|
|
|
|
def gettransaction(self):
|
|
|
raise TransactionUnavailable('no repo access from stream interruption')
|
|
|
|
|
|
class unbundlepart(unpackermixin):
|
|
|
"""a bundle part read from a bundle"""
|
|
|
|
|
|
def __init__(self, ui, header, fp):
|
|
|
super(unbundlepart, self).__init__(fp)
|
|
|
self._seekable = (util.safehasattr(fp, 'seek') and
|
|
|
util.safehasattr(fp, 'tell'))
|
|
|
self.ui = ui
|
|
|
# unbundle state attr
|
|
|
self._headerdata = header
|
|
|
self._headeroffset = 0
|
|
|
self._initialized = False
|
|
|
self.consumed = False
|
|
|
# part data
|
|
|
self.id = None
|
|
|
self.type = None
|
|
|
self.mandatoryparams = None
|
|
|
self.advisoryparams = None
|
|
|
self.params = None
|
|
|
self.mandatorykeys = ()
|
|
|
self._payloadstream = None
|
|
|
self._readheader()
|
|
|
self._mandatory = None
|
|
|
self._chunkindex = [] #(payload, file) position tuples for chunk starts
|
|
|
self._pos = 0
|
|
|
|
|
|
def _fromheader(self, size):
|
|
|
"""return the next <size> byte from the header"""
|
|
|
offset = self._headeroffset
|
|
|
data = self._headerdata[offset:(offset + size)]
|
|
|
self._headeroffset = offset + size
|
|
|
return data
|
|
|
|
|
|
def _unpackheader(self, format):
|
|
|
"""read given format from header
|
|
|
|
|
|
This automatically compute the size of the format to read."""
|
|
|
data = self._fromheader(struct.calcsize(format))
|
|
|
return _unpack(format, data)
|
|
|
|
|
|
def _initparams(self, mandatoryparams, advisoryparams):
|
|
|
"""internal function to setup all logic related parameters"""
|
|
|
# make it read only to prevent people touching it by mistake.
|
|
|
self.mandatoryparams = tuple(mandatoryparams)
|
|
|
self.advisoryparams = tuple(advisoryparams)
|
|
|
# user friendly UI
|
|
|
self.params = util.sortdict(self.mandatoryparams)
|
|
|
self.params.update(self.advisoryparams)
|
|
|
self.mandatorykeys = frozenset(p[0] for p in mandatoryparams)
|
|
|
|
|
|
def _payloadchunks(self, chunknum=0):
|
|
|
'''seek to specified chunk and start yielding data'''
|
|
|
if len(self._chunkindex) == 0:
|
|
|
assert chunknum == 0, 'Must start with chunk 0'
|
|
|
self._chunkindex.append((0, self._tellfp()))
|
|
|
else:
|
|
|
assert chunknum < len(self._chunkindex), \
|
|
|
'Unknown chunk %d' % chunknum
|
|
|
self._seekfp(self._chunkindex[chunknum][1])
|
|
|
|
|
|
pos = self._chunkindex[chunknum][0]
|
|
|
payloadsize = self._unpack(_fpayloadsize)[0]
|
|
|
indebug(self.ui, 'payload chunk size: %i' % payloadsize)
|
|
|
while payloadsize:
|
|
|
if payloadsize == flaginterrupt:
|
|
|
# interruption detection, the handler will now read a
|
|
|
# single part and process it.
|
|
|
interrupthandler(self.ui, self._fp)()
|
|
|
elif payloadsize < 0:
|
|
|
msg = 'negative payload chunk size: %i' % payloadsize
|
|
|
raise error.BundleValueError(msg)
|
|
|
else:
|
|
|
result = self._readexact(payloadsize)
|
|
|
chunknum += 1
|
|
|
pos += payloadsize
|
|
|
if chunknum == len(self._chunkindex):
|
|
|
self._chunkindex.append((pos, self._tellfp()))
|
|
|
yield result
|
|
|
payloadsize = self._unpack(_fpayloadsize)[0]
|
|
|
indebug(self.ui, 'payload chunk size: %i' % payloadsize)
|
|
|
|
|
|
def _findchunk(self, pos):
|
|
|
'''for a given payload position, return a chunk number and offset'''
|
|
|
for chunk, (ppos, fpos) in enumerate(self._chunkindex):
|
|
|
if ppos == pos:
|
|
|
return chunk, 0
|
|
|
elif ppos > pos:
|
|
|
return chunk - 1, pos - self._chunkindex[chunk - 1][0]
|
|
|
raise ValueError('Unknown chunk')
|
|
|
|
|
|
def _readheader(self):
|
|
|
"""read the header and setup the object"""
|
|
|
typesize = self._unpackheader(_fparttypesize)[0]
|
|
|
self.type = self._fromheader(typesize)
|
|
|
indebug(self.ui, 'part type: "%s"' % self.type)
|
|
|
self.id = self._unpackheader(_fpartid)[0]
|
|
|
indebug(self.ui, 'part id: "%s"' % self.id)
|
|
|
# extract mandatory bit from type
|
|
|
self.mandatory = (self.type != self.type.lower())
|
|
|
self.type = self.type.lower()
|
|
|
## reading parameters
|
|
|
# param count
|
|
|
mancount, advcount = self._unpackheader(_fpartparamcount)
|
|
|
indebug(self.ui, 'part parameters: %i' % (mancount + advcount))
|
|
|
# param size
|
|
|
fparamsizes = _makefpartparamsizes(mancount + advcount)
|
|
|
paramsizes = self._unpackheader(fparamsizes)
|
|
|
# make it a list of couple again
|
|
|
paramsizes = zip(paramsizes[::2], paramsizes[1::2])
|
|
|
# split mandatory from advisory
|
|
|
mansizes = paramsizes[:mancount]
|
|
|
advsizes = paramsizes[mancount:]
|
|
|
# retrieve param value
|
|
|
manparams = []
|
|
|
for key, value in mansizes:
|
|
|
manparams.append((self._fromheader(key), self._fromheader(value)))
|
|
|
advparams = []
|
|
|
for key, value in advsizes:
|
|
|
advparams.append((self._fromheader(key), self._fromheader(value)))
|
|
|
self._initparams(manparams, advparams)
|
|
|
## part payload
|
|
|
self._payloadstream = util.chunkbuffer(self._payloadchunks())
|
|
|
# we read the data, tell it
|
|
|
self._initialized = True
|
|
|
|
|
|
def read(self, size=None):
|
|
|
"""read payload data"""
|
|
|
if not self._initialized:
|
|
|
self._readheader()
|
|
|
if size is None:
|
|
|
data = self._payloadstream.read()
|
|
|
else:
|
|
|
data = self._payloadstream.read(size)
|
|
|
self._pos += len(data)
|
|
|
if size is None or len(data) < size:
|
|
|
if not self.consumed and self._pos:
|
|
|
self.ui.debug('bundle2-input-part: total payload size %i\n'
|
|
|
% self._pos)
|
|
|
self.consumed = True
|
|
|
return data
|
|
|
|
|
|
def tell(self):
|
|
|
return self._pos
|
|
|
|
|
|
def seek(self, offset, whence=0):
|
|
|
if whence == 0:
|
|
|
newpos = offset
|
|
|
elif whence == 1:
|
|
|
newpos = self._pos + offset
|
|
|
elif whence == 2:
|
|
|
if not self.consumed:
|
|
|
self.read()
|
|
|
newpos = self._chunkindex[-1][0] - offset
|
|
|
else:
|
|
|
raise ValueError('Unknown whence value: %r' % (whence,))
|
|
|
|
|
|
if newpos > self._chunkindex[-1][0] and not self.consumed:
|
|
|
self.read()
|
|
|
if not 0 <= newpos <= self._chunkindex[-1][0]:
|
|
|
raise ValueError('Offset out of range')
|
|
|
|
|
|
if self._pos != newpos:
|
|
|
chunk, internaloffset = self._findchunk(newpos)
|
|
|
self._payloadstream = util.chunkbuffer(self._payloadchunks(chunk))
|
|
|
adjust = self.read(internaloffset)
|
|
|
if len(adjust) != internaloffset:
|
|
|
raise error.Abort(_('Seek failed\n'))
|
|
|
self._pos = newpos
|
|
|
|
|
|
def _seekfp(self, offset, whence=0):
|
|
|
"""move the underlying file pointer
|
|
|
|
|
|
This method is meant for internal usage by the bundle2 protocol only.
|
|
|
They directly manipulate the low level stream including bundle2 level
|
|
|
instruction.
|
|
|
|
|
|
Do not use it to implement higher-level logic or methods."""
|
|
|
if self._seekable:
|
|
|
return self._fp.seek(offset, whence)
|
|
|
else:
|
|
|
raise NotImplementedError(_('File pointer is not seekable'))
|
|
|
|
|
|
def _tellfp(self):
|
|
|
"""return the file offset, or None if file is not seekable
|
|
|
|
|
|
This method is meant for internal usage by the bundle2 protocol only.
|
|
|
They directly manipulate the low level stream including bundle2 level
|
|
|
instruction.
|
|
|
|
|
|
Do not use it to implement higher-level logic or methods."""
|
|
|
if self._seekable:
|
|
|
try:
|
|
|
return self._fp.tell()
|
|
|
except IOError as e:
|
|
|
if e.errno == errno.ESPIPE:
|
|
|
self._seekable = False
|
|
|
else:
|
|
|
raise
|
|
|
return None
|
|
|
|
|
|
# These are only the static capabilities.
|
|
|
# Check the 'getrepocaps' function for the rest.
|
|
|
capabilities = {'HG20': (),
|
|
|
'error': ('abort', 'unsupportedcontent', 'pushraced',
|
|
|
'pushkey'),
|
|
|
'listkeys': (),
|
|
|
'pushkey': (),
|
|
|
'digests': tuple(sorted(util.DIGESTS.keys())),
|
|
|
'remote-changegroup': ('http', 'https'),
|
|
|
'hgtagsfnodes': (),
|
|
|
}
|
|
|
|
|
|
def getrepocaps(repo, allowpushback=False):
|
|
|
"""return the bundle2 capabilities for a given repo
|
|
|
|
|
|
Exists to allow extensions (like evolution) to mutate the capabilities.
|
|
|
"""
|
|
|
caps = capabilities.copy()
|
|
|
caps['changegroup'] = tuple(sorted(
|
|
|
changegroup.supportedincomingversions(repo)))
|
|
|
if obsolete.isenabled(repo, obsolete.exchangeopt):
|
|
|
supportedformat = tuple('V%i' % v for v in obsolete.formats)
|
|
|
caps['obsmarkers'] = supportedformat
|
|
|
if allowpushback:
|
|
|
caps['pushback'] = ()
|
|
|
cpmode = repo.ui.config('server', 'concurrent-push-mode', 'strict')
|
|
|
if cpmode == 'check-related':
|
|
|
caps['checkheads'] = ('related',)
|
|
|
return caps
|
|
|
|
|
|
def bundle2caps(remote):
|
|
|
"""return the bundle capabilities of a peer as dict"""
|
|
|
raw = remote.capable('bundle2')
|
|
|
if not raw and raw != '':
|
|
|
return {}
|
|
|
capsblob = urlreq.unquote(remote.capable('bundle2'))
|
|
|
return decodecaps(capsblob)
|
|
|
|
|
|
def obsmarkersversion(caps):
|
|
|
"""extract the list of supported obsmarkers versions from a bundle2caps dict
|
|
|
"""
|
|
|
obscaps = caps.get('obsmarkers', ())
|
|
|
return [int(c[1:]) for c in obscaps if c.startswith('V')]
|
|
|
|
|
|
def writenewbundle(ui, repo, source, filename, bundletype, outgoing, opts,
|
|
|
vfs=None, compression=None, compopts=None):
|
|
|
if bundletype.startswith('HG10'):
|
|
|
cg = changegroup.getchangegroup(repo, source, outgoing, version='01')
|
|
|
return writebundle(ui, cg, filename, bundletype, vfs=vfs,
|
|
|
compression=compression, compopts=compopts)
|
|
|
elif not bundletype.startswith('HG20'):
|
|
|
raise error.ProgrammingError('unknown bundle type: %s' % bundletype)
|
|
|
|
|
|
caps = {}
|
|
|
if 'obsolescence' in opts:
|
|
|
caps['obsmarkers'] = ('V1',)
|
|
|
bundle = bundle20(ui, caps)
|
|
|
bundle.setcompression(compression, compopts)
|
|
|
_addpartsfromopts(ui, repo, bundle, source, outgoing, opts)
|
|
|
chunkiter = bundle.getchunks()
|
|
|
|
|
|
return changegroup.writechunks(ui, chunkiter, filename, vfs=vfs)
|
|
|
|
|
|
def _addpartsfromopts(ui, repo, bundler, source, outgoing, opts):
|
|
|
# We should eventually reconcile this logic with the one behind
|
|
|
# 'exchange.getbundle2partsgenerator'.
|
|
|
#
|
|
|
# The type of input from 'getbundle' and 'writenewbundle' are a bit
|
|
|
# different right now. So we keep them separated for now for the sake of
|
|
|
# simplicity.
|
|
|
|
|
|
# we always want a changegroup in such bundle
|
|
|
cgversion = opts.get('cg.version')
|
|
|
if cgversion is None:
|
|
|
cgversion = changegroup.safeversion(repo)
|
|
|
cg = changegroup.getchangegroup(repo, source, outgoing,
|
|
|
version=cgversion)
|
|
|
part = bundler.newpart('changegroup', data=cg.getchunks())
|
|
|
part.addparam('version', cg.version)
|
|
|
if 'clcount' in cg.extras:
|
|
|
part.addparam('nbchanges', str(cg.extras['clcount']),
|
|
|
mandatory=False)
|
|
|
|
|
|
addparttagsfnodescache(repo, bundler, outgoing)
|
|
|
|
|
|
if opts.get('obsolescence', False):
|
|
|
obsmarkers = repo.obsstore.relevantmarkers(outgoing.missing)
|
|
|
buildobsmarkerspart(bundler, obsmarkers)
|
|
|
|
|
|
def addparttagsfnodescache(repo, bundler, outgoing):
|
|
|
# we include the tags fnode cache for the bundle changeset
|
|
|
# (as an optional parts)
|
|
|
cache = tags.hgtagsfnodescache(repo.unfiltered())
|
|
|
chunks = []
|
|
|
|
|
|
# .hgtags fnodes are only relevant for head changesets. While we could
|
|
|
# transfer values for all known nodes, there will likely be little to
|
|
|
# no benefit.
|
|
|
#
|
|
|
# We don't bother using a generator to produce output data because
|
|
|
# a) we only have 40 bytes per head and even esoteric numbers of heads
|
|
|
# consume little memory (1M heads is 40MB) b) we don't want to send the
|
|
|
# part if we don't have entries and knowing if we have entries requires
|
|
|
# cache lookups.
|
|
|
for node in outgoing.missingheads:
|
|
|
# Don't compute missing, as this may slow down serving.
|
|
|
fnode = cache.getfnode(node, computemissing=False)
|
|
|
if fnode is not None:
|
|
|
chunks.extend([node, fnode])
|
|
|
|
|
|
if chunks:
|
|
|
bundler.newpart('hgtagsfnodes', data=''.join(chunks))
|
|
|
|
|
|
def buildobsmarkerspart(bundler, markers):
|
|
|
"""add an obsmarker part to the bundler with <markers>
|
|
|
|
|
|
No part is created if markers is empty.
|
|
|
Raises ValueError if the bundler doesn't support any known obsmarker format.
|
|
|
"""
|
|
|
if not markers:
|
|
|
return None
|
|
|
|
|
|
remoteversions = obsmarkersversion(bundler.capabilities)
|
|
|
version = obsolete.commonversion(remoteversions)
|
|
|
if version is None:
|
|
|
raise ValueError('bundler does not support common obsmarker format')
|
|
|
stream = obsolete.encodemarkers(markers, True, version=version)
|
|
|
return bundler.newpart('obsmarkers', data=stream)
|
|
|
|
|
|
def writebundle(ui, cg, filename, bundletype, vfs=None, compression=None,
|
|
|
compopts=None):
|
|
|
"""Write a bundle file and return its filename.
|
|
|
|
|
|
Existing files will not be overwritten.
|
|
|
If no filename is specified, a temporary file is created.
|
|
|
bz2 compression can be turned off.
|
|
|
The bundle file will be deleted in case of errors.
|
|
|
"""
|
|
|
|
|
|
if bundletype == "HG20":
|
|
|
bundle = bundle20(ui)
|
|
|
bundle.setcompression(compression, compopts)
|
|
|
part = bundle.newpart('changegroup', data=cg.getchunks())
|
|
|
part.addparam('version', cg.version)
|
|
|
if 'clcount' in cg.extras:
|
|
|
part.addparam('nbchanges', str(cg.extras['clcount']),
|
|
|
mandatory=False)
|
|
|
chunkiter = bundle.getchunks()
|
|
|
else:
|
|
|
# compression argument is only for the bundle2 case
|
|
|
assert compression is None
|
|
|
if cg.version != '01':
|
|
|
raise error.Abort(_('old bundle types only supports v1 '
|
|
|
'changegroups'))
|
|
|
header, comp = bundletypes[bundletype]
|
|
|
if comp not in util.compengines.supportedbundletypes:
|
|
|
raise error.Abort(_('unknown stream compression type: %s')
|
|
|
% comp)
|
|
|
compengine = util.compengines.forbundletype(comp)
|
|
|
def chunkiter():
|
|
|
yield header
|
|
|
for chunk in compengine.compressstream(cg.getchunks(), compopts):
|
|
|
yield chunk
|
|
|
chunkiter = chunkiter()
|
|
|
|
|
|
# parse the changegroup data, otherwise we will block
|
|
|
# in case of sshrepo because we don't know the end of the stream
|
|
|
return changegroup.writechunks(ui, chunkiter, filename, vfs=vfs)
|
|
|
|
|
|
@parthandler('changegroup', ('version', 'nbchanges', 'treemanifest'))
|
|
|
def handlechangegroup(op, inpart):
|
|
|
"""apply a changegroup part on the repo
|
|
|
|
|
|
This is a very early implementation that will massive rework before being
|
|
|
inflicted to any end-user.
|
|
|
"""
|
|
|
tr = op.gettransaction()
|
|
|
unpackerversion = inpart.params.get('version', '01')
|
|
|
# We should raise an appropriate exception here
|
|
|
cg = changegroup.getunbundler(unpackerversion, inpart, None)
|
|
|
# the source and url passed here are overwritten by the one contained in
|
|
|
# the transaction.hookargs argument. So 'bundle2' is a placeholder
|
|
|
nbchangesets = None
|
|
|
if 'nbchanges' in inpart.params:
|
|
|
nbchangesets = int(inpart.params.get('nbchanges'))
|
|
|
if ('treemanifest' in inpart.params and
|
|
|
'treemanifest' not in op.repo.requirements):
|
|
|
if len(op.repo.changelog) != 0:
|
|
|
raise error.Abort(_(
|
|
|
"bundle contains tree manifests, but local repo is "
|
|
|
"non-empty and does not use tree manifests"))
|
|
|
op.repo.requirements.add('treemanifest')
|
|
|
op.repo._applyopenerreqs()
|
|
|
op.repo._writerequirements()
|
|
|
ret = cg.apply(op.repo, tr, 'bundle2', 'bundle2',
|
|
|
expectedtotal=nbchangesets)
|
|
|
op.records.add('changegroup', {'return': ret})
|
|
|
if op.reply is not None:
|
|
|
# This is definitely not the final form of this
|
|
|
# return. But one need to start somewhere.
|
|
|
part = op.reply.newpart('reply:changegroup', mandatory=False)
|
|
|
part.addparam('in-reply-to', str(inpart.id), mandatory=False)
|
|
|
part.addparam('return', '%i' % ret, mandatory=False)
|
|
|
assert not inpart.read()
|
|
|
|
|
|
_remotechangegroupparams = tuple(['url', 'size', 'digests'] +
|
|
|
['digest:%s' % k for k in util.DIGESTS.keys()])
|
|
|
@parthandler('remote-changegroup', _remotechangegroupparams)
|
|
|
def handleremotechangegroup(op, inpart):
|
|
|
"""apply a bundle10 on the repo, given an url and validation information
|
|
|
|
|
|
All the information about the remote bundle to import are given as
|
|
|
parameters. The parameters include:
|
|
|
- url: the url to the bundle10.
|
|
|
- size: the bundle10 file size. It is used to validate what was
|
|
|
retrieved by the client matches the server knowledge about the bundle.
|
|
|
- digests: a space separated list of the digest types provided as
|
|
|
parameters.
|
|
|
- digest:<digest-type>: the hexadecimal representation of the digest with
|
|
|
that name. Like the size, it is used to validate what was retrieved by
|
|
|
the client matches what the server knows about the bundle.
|
|
|
|
|
|
When multiple digest types are given, all of them are checked.
|
|
|
"""
|
|
|
try:
|
|
|
raw_url = inpart.params['url']
|
|
|
except KeyError:
|
|
|
raise error.Abort(_('remote-changegroup: missing "%s" param') % 'url')
|
|
|
parsed_url = util.url(raw_url)
|
|
|
if parsed_url.scheme not in capabilities['remote-changegroup']:
|
|
|
raise error.Abort(_('remote-changegroup does not support %s urls') %
|
|
|
parsed_url.scheme)
|
|
|
|
|
|
try:
|
|
|
size = int(inpart.params['size'])
|
|
|
except ValueError:
|
|
|
raise error.Abort(_('remote-changegroup: invalid value for param "%s"')
|
|
|
% 'size')
|
|
|
except KeyError:
|
|
|
raise error.Abort(_('remote-changegroup: missing "%s" param') % 'size')
|
|
|
|
|
|
digests = {}
|
|
|
for typ in inpart.params.get('digests', '').split():
|
|
|
param = 'digest:%s' % typ
|
|
|
try:
|
|
|
value = inpart.params[param]
|
|
|
except KeyError:
|
|
|
raise error.Abort(_('remote-changegroup: missing "%s" param') %
|
|
|
param)
|
|
|
digests[typ] = value
|
|
|
|
|
|
real_part = util.digestchecker(url.open(op.ui, raw_url), size, digests)
|
|
|
|
|
|
tr = op.gettransaction()
|
|
|
from . import exchange
|
|
|
cg = exchange.readbundle(op.repo.ui, real_part, raw_url)
|
|
|
if not isinstance(cg, changegroup.cg1unpacker):
|
|
|
raise error.Abort(_('%s: not a bundle version 1.0') %
|
|
|
util.hidepassword(raw_url))
|
|
|
ret = cg.apply(op.repo, tr, 'bundle2', 'bundle2')
|
|
|
op.records.add('changegroup', {'return': ret})
|
|
|
if op.reply is not None:
|
|
|
# This is definitely not the final form of this
|
|
|
# return. But one need to start somewhere.
|
|
|
part = op.reply.newpart('reply:changegroup')
|
|
|
part.addparam('in-reply-to', str(inpart.id), mandatory=False)
|
|
|
part.addparam('return', '%i' % ret, mandatory=False)
|
|
|
try:
|
|
|
real_part.validate()
|
|
|
except error.Abort as e:
|
|
|
raise error.Abort(_('bundle at %s is corrupted:\n%s') %
|
|
|
(util.hidepassword(raw_url), str(e)))
|
|
|
assert not inpart.read()
|
|
|
|
|
|
@parthandler('reply:changegroup', ('return', 'in-reply-to'))
|
|
|
def handlereplychangegroup(op, inpart):
|
|
|
ret = int(inpart.params['return'])
|
|
|
replyto = int(inpart.params['in-reply-to'])
|
|
|
op.records.add('changegroup', {'return': ret}, replyto)
|
|
|
|
|
|
@parthandler('check:heads')
|
|
|
def handlecheckheads(op, inpart):
|
|
|
"""check that head of the repo did not change
|
|
|
|
|
|
This is used to detect a push race when using unbundle.
|
|
|
This replaces the "heads" argument of unbundle."""
|
|
|
h = inpart.read(20)
|
|
|
heads = []
|
|
|
while len(h) == 20:
|
|
|
heads.append(h)
|
|
|
h = inpart.read(20)
|
|
|
assert not h
|
|
|
# Trigger a transaction so that we are guaranteed to have the lock now.
|
|
|
if op.ui.configbool('experimental', 'bundle2lazylocking'):
|
|
|
op.gettransaction()
|
|
|
if sorted(heads) != sorted(op.repo.heads()):
|
|
|
raise error.PushRaced('repository changed while pushing - '
|
|
|
'please try again')
|
|
|
|
|
|
@parthandler('check:updated-heads')
|
|
|
def handlecheckupdatedheads(op, inpart):
|
|
|
"""check for race on the heads touched by a push
|
|
|
|
|
|
This is similar to 'check:heads' but focus on the heads actually updated
|
|
|
during the push. If other activities happen on unrelated heads, it is
|
|
|
ignored.
|
|
|
|
|
|
This allow server with high traffic to avoid push contention as long as
|
|
|
unrelated parts of the graph are involved."""
|
|
|
h = inpart.read(20)
|
|
|
heads = []
|
|
|
while len(h) == 20:
|
|
|
heads.append(h)
|
|
|
h = inpart.read(20)
|
|
|
assert not h
|
|
|
# trigger a transaction so that we are guaranteed to have the lock now.
|
|
|
if op.ui.configbool('experimental', 'bundle2lazylocking'):
|
|
|
op.gettransaction()
|
|
|
|
|
|
currentheads = set()
|
|
|
for ls in op.repo.branchmap().itervalues():
|
|
|
currentheads.update(ls)
|
|
|
|
|
|
for h in heads:
|
|
|
if h not in currentheads:
|
|
|
raise error.PushRaced('repository changed while pushing - '
|
|
|
'please try again')
|
|
|
|
|
|
@parthandler('output')
|
|
|
def handleoutput(op, inpart):
|
|
|
"""forward output captured on the server to the client"""
|
|
|
for line in inpart.read().splitlines():
|
|
|
op.ui.status(_('remote: %s\n') % line)
|
|
|
|
|
|
@parthandler('replycaps')
|
|
|
def handlereplycaps(op, inpart):
|
|
|
"""Notify that a reply bundle should be created
|
|
|
|
|
|
The payload contains the capabilities information for the reply"""
|
|
|
caps = decodecaps(inpart.read())
|
|
|
if op.reply is None:
|
|
|
op.reply = bundle20(op.ui, caps)
|
|
|
|
|
|
class AbortFromPart(error.Abort):
|
|
|
"""Sub-class of Abort that denotes an error from a bundle2 part."""
|
|
|
|
|
|
@parthandler('error:abort', ('message', 'hint'))
|
|
|
def handleerrorabort(op, inpart):
|
|
|
"""Used to transmit abort error over the wire"""
|
|
|
raise AbortFromPart(inpart.params['message'],
|
|
|
hint=inpart.params.get('hint'))
|
|
|
|
|
|
@parthandler('error:pushkey', ('namespace', 'key', 'new', 'old', 'ret',
|
|
|
'in-reply-to'))
|
|
|
def handleerrorpushkey(op, inpart):
|
|
|
"""Used to transmit failure of a mandatory pushkey over the wire"""
|
|
|
kwargs = {}
|
|
|
for name in ('namespace', 'key', 'new', 'old', 'ret'):
|
|
|
value = inpart.params.get(name)
|
|
|
if value is not None:
|
|
|
kwargs[name] = value
|
|
|
raise error.PushkeyFailed(inpart.params['in-reply-to'], **kwargs)
|
|
|
|
|
|
@parthandler('error:unsupportedcontent', ('parttype', 'params'))
|
|
|
def handleerrorunsupportedcontent(op, inpart):
|
|
|
"""Used to transmit unknown content error over the wire"""
|
|
|
kwargs = {}
|
|
|
parttype = inpart.params.get('parttype')
|
|
|
if parttype is not None:
|
|
|
kwargs['parttype'] = parttype
|
|
|
params = inpart.params.get('params')
|
|
|
if params is not None:
|
|
|
kwargs['params'] = params.split('\0')
|
|
|
|
|
|
raise error.BundleUnknownFeatureError(**kwargs)
|
|
|
|
|
|
@parthandler('error:pushraced', ('message',))
|
|
|
def handleerrorpushraced(op, inpart):
|
|
|
"""Used to transmit push race error over the wire"""
|
|
|
raise error.ResponseError(_('push failed:'), inpart.params['message'])
|
|
|
|
|
|
@parthandler('listkeys', ('namespace',))
|
|
|
def handlelistkeys(op, inpart):
|
|
|
"""retrieve pushkey namespace content stored in a bundle2"""
|
|
|
namespace = inpart.params['namespace']
|
|
|
r = pushkey.decodekeys(inpart.read())
|
|
|
op.records.add('listkeys', (namespace, r))
|
|
|
|
|
|
@parthandler('pushkey', ('namespace', 'key', 'old', 'new'))
|
|
|
def handlepushkey(op, inpart):
|
|
|
"""process a pushkey request"""
|
|
|
dec = pushkey.decode
|
|
|
namespace = dec(inpart.params['namespace'])
|
|
|
key = dec(inpart.params['key'])
|
|
|
old = dec(inpart.params['old'])
|
|
|
new = dec(inpart.params['new'])
|
|
|
# Grab the transaction to ensure that we have the lock before performing the
|
|
|
# pushkey.
|
|
|
if op.ui.configbool('experimental', 'bundle2lazylocking'):
|
|
|
op.gettransaction()
|
|
|
ret = op.repo.pushkey(namespace, key, old, new)
|
|
|
record = {'namespace': namespace,
|
|
|
'key': key,
|
|
|
'old': old,
|
|
|
'new': new}
|
|
|
op.records.add('pushkey', record)
|
|
|
if op.reply is not None:
|
|
|
rpart = op.reply.newpart('reply:pushkey')
|
|
|
rpart.addparam('in-reply-to', str(inpart.id), mandatory=False)
|
|
|
rpart.addparam('return', '%i' % ret, mandatory=False)
|
|
|
if inpart.mandatory and not ret:
|
|
|
kwargs = {}
|
|
|
for key in ('namespace', 'key', 'new', 'old', 'ret'):
|
|
|
if key in inpart.params:
|
|
|
kwargs[key] = inpart.params[key]
|
|
|
raise error.PushkeyFailed(partid=str(inpart.id), **kwargs)
|
|
|
|
|
|
@parthandler('reply:pushkey', ('return', 'in-reply-to'))
|
|
|
def handlepushkeyreply(op, inpart):
|
|
|
"""retrieve the result of a pushkey request"""
|
|
|
ret = int(inpart.params['return'])
|
|
|
partid = int(inpart.params['in-reply-to'])
|
|
|
op.records.add('pushkey', {'return': ret}, partid)
|
|
|
|
|
|
@parthandler('obsmarkers')
|
|
|
def handleobsmarker(op, inpart):
|
|
|
"""add a stream of obsmarkers to the repo"""
|
|
|
tr = op.gettransaction()
|
|
|
markerdata = inpart.read()
|
|
|
if op.ui.config('experimental', 'obsmarkers-exchange-debug', False):
|
|
|
op.ui.write(('obsmarker-exchange: %i bytes received\n')
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|
% len(markerdata))
|
|
|
# The mergemarkers call will crash if marker creation is not enabled.
|
|
|
# we want to avoid this if the part is advisory.
|
|
|
if not inpart.mandatory and op.repo.obsstore.readonly:
|
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|
op.repo.ui.debug('ignoring obsolescence markers, feature not enabled')
|
|
|
return
|
|
|
new = op.repo.obsstore.mergemarkers(tr, markerdata)
|
|
|
op.repo.invalidatevolatilesets()
|
|
|
if new:
|
|
|
op.repo.ui.status(_('%i new obsolescence markers\n') % new)
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|
|
op.records.add('obsmarkers', {'new': new})
|
|
|
if op.reply is not None:
|
|
|
rpart = op.reply.newpart('reply:obsmarkers')
|
|
|
rpart.addparam('in-reply-to', str(inpart.id), mandatory=False)
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|
|
rpart.addparam('new', '%i' % new, mandatory=False)
|
|
|
|
|
|
|
|
|
@parthandler('reply:obsmarkers', ('new', 'in-reply-to'))
|
|
|
def handleobsmarkerreply(op, inpart):
|
|
|
"""retrieve the result of a pushkey request"""
|
|
|
ret = int(inpart.params['new'])
|
|
|
partid = int(inpart.params['in-reply-to'])
|
|
|
op.records.add('obsmarkers', {'new': ret}, partid)
|
|
|
|
|
|
@parthandler('hgtagsfnodes')
|
|
|
def handlehgtagsfnodes(op, inpart):
|
|
|
"""Applies .hgtags fnodes cache entries to the local repo.
|
|
|
|
|
|
Payload is pairs of 20 byte changeset nodes and filenodes.
|
|
|
"""
|
|
|
# Grab the transaction so we ensure that we have the lock at this point.
|
|
|
if op.ui.configbool('experimental', 'bundle2lazylocking'):
|
|
|
op.gettransaction()
|
|
|
cache = tags.hgtagsfnodescache(op.repo.unfiltered())
|
|
|
|
|
|
count = 0
|
|
|
while True:
|
|
|
node = inpart.read(20)
|
|
|
fnode = inpart.read(20)
|
|
|
if len(node) < 20 or len(fnode) < 20:
|
|
|
op.ui.debug('ignoring incomplete received .hgtags fnodes data\n')
|
|
|
break
|
|
|
cache.setfnode(node, fnode)
|
|
|
count += 1
|
|
|
|
|
|
cache.write()
|
|
|
op.ui.debug('applied %i hgtags fnodes cache entries\n' % count)
|
|
|
|
