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# merge.py - directory-level update/merge handling for Mercurial
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#
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# Copyright 2006, 2007 Matt Mackall <mpm@selenic.com>
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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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import struct
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from node import nullid, nullrev, hex, bin
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from i18n import _
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from mercurial import obsolete
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import error as errormod, util, filemerge, copies, subrepo, worker
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import errno, os, shutil
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_pack = struct.pack
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_unpack = struct.unpack
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def _droponode(data):
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# used for compatibility for v1
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bits = data.split('\0')
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bits = bits[:-2] + bits[-1:]
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return '\0'.join(bits)
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class mergestate(object):
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'''track 3-way merge state of individual files
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it is stored on disk when needed. Two file are used, one with an old
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format, one with a new format. Both contains similar data, but the new
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format can store new kind of field.
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Current new format is a list of arbitrary record of the form:
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[type][length][content]
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Type is a single character, length is a 4 bytes integer, content is an
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arbitrary suites of bytes of length `length`.
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Type should be a letter. Capital letter are mandatory record, Mercurial
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should abort if they are unknown. lower case record can be safely ignored.
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Currently known record:
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L: the node of the "local" part of the merge (hexified version)
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O: the node of the "other" part of the merge (hexified version)
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F: a file to be merged entry
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'''
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statepathv1 = 'merge/state'
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statepathv2 = 'merge/state2'
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def __init__(self, repo):
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self._repo = repo
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self._dirty = False
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self._read()
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def reset(self, node=None, other=None):
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self._state = {}
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self._local = None
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self._other = None
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if node:
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self._local = node
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self._other = other
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shutil.rmtree(self._repo.join('merge'), True)
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self._dirty = False
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def _read(self):
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"""Analyse each record content to restore a serialized state from disk
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This function process "record" entry produced by the de-serialization
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of on disk file.
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"""
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self._state = {}
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self._local = None
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self._other = None
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records = self._readrecords()
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for rtype, record in records:
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if rtype == 'L':
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self._local = bin(record)
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elif rtype == 'O':
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self._other = bin(record)
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elif rtype == 'F':
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bits = record.split('\0')
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self._state[bits[0]] = bits[1:]
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elif not rtype.islower():
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raise util.Abort(_('unsupported merge state record: %s')
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% rtype)
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self._dirty = False
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def _readrecords(self):
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"""Read merge state from disk and return a list of record (TYPE, data)
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We read data from both v1 and v2 files and decide which one to use.
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V1 has been used by version prior to 2.9.1 and contains less data than
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v2. We read both versions and check if no data in v2 contradicts
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v1. If there is not contradiction we can safely assume that both v1
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and v2 were written at the same time and use the extract data in v2. If
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there is contradiction we ignore v2 content as we assume an old version
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of Mercurial has overwritten the mergestate file and left an old v2
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file around.
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returns list of record [(TYPE, data), ...]"""
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v1records = self._readrecordsv1()
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v2records = self._readrecordsv2()
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oldv2 = set() # old format version of v2 record
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for rec in v2records:
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if rec[0] == 'L':
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oldv2.add(rec)
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elif rec[0] == 'F':
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# drop the onode data (not contained in v1)
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oldv2.add(('F', _droponode(rec[1])))
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for rec in v1records:
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if rec not in oldv2:
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# v1 file is newer than v2 file, use it
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# we have to infer the "other" changeset of the merge
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# we cannot do better than that with v1 of the format
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mctx = self._repo[None].parents()[-1]
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v1records.append(('O', mctx.hex()))
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# add place holder "other" file node information
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# nobody is using it yet so we do no need to fetch the data
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# if mctx was wrong `mctx[bits[-2]]` may fails.
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for idx, r in enumerate(v1records):
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if r[0] == 'F':
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bits = r[1].split('\0')
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bits.insert(-2, '')
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v1records[idx] = (r[0], '\0'.join(bits))
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return v1records
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else:
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return v2records
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def _readrecordsv1(self):
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"""read on disk merge state for version 1 file
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returns list of record [(TYPE, data), ...]
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Note: the "F" data from this file are one entry short
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(no "other file node" entry)
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"""
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records = []
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try:
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f = self._repo.vfs(self.statepathv1)
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for i, l in enumerate(f):
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if i == 0:
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records.append(('L', l[:-1]))
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else:
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records.append(('F', l[:-1]))
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f.close()
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except IOError, err:
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if err.errno != errno.ENOENT:
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raise
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return records
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def _readrecordsv2(self):
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"""read on disk merge state for version 2 file
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returns list of record [(TYPE, data), ...]
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"""
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records = []
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try:
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f = self._repo.vfs(self.statepathv2)
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data = f.read()
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off = 0
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end = len(data)
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while off < end:
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rtype = data[off]
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off += 1
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length = _unpack('>I', data[off:(off + 4)])[0]
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off += 4
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record = data[off:(off + length)]
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off += length
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records.append((rtype, record))
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f.close()
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except IOError, err:
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if err.errno != errno.ENOENT:
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raise
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return records
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def active(self):
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"""Whether mergestate is active.
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Returns True if there appears to be mergestate. This is a rough proxy
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for "is a merge in progress."
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"""
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# Check local variables before looking at filesystem for performance
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# reasons.
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return bool(self._local) or bool(self._state) or \
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self._repo.vfs.exists(self.statepathv1) or \
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self._repo.vfs.exists(self.statepathv2)
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def commit(self):
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"""Write current state on disk (if necessary)"""
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if self._dirty:
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records = []
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records.append(('L', hex(self._local)))
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records.append(('O', hex(self._other)))
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for d, v in self._state.iteritems():
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records.append(('F', '\0'.join([d] + v)))
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self._writerecords(records)
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self._dirty = False
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def _writerecords(self, records):
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"""Write current state on disk (both v1 and v2)"""
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self._writerecordsv1(records)
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self._writerecordsv2(records)
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def _writerecordsv1(self, records):
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"""Write current state on disk in a version 1 file"""
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f = self._repo.vfs(self.statepathv1, 'w')
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irecords = iter(records)
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lrecords = irecords.next()
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assert lrecords[0] == 'L'
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f.write(hex(self._local) + '\n')
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for rtype, data in irecords:
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if rtype == 'F':
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f.write('%s\n' % _droponode(data))
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f.close()
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def _writerecordsv2(self, records):
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"""Write current state on disk in a version 2 file"""
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f = self._repo.vfs(self.statepathv2, 'w')
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for key, data in records:
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assert len(key) == 1
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format = '>sI%is' % len(data)
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f.write(_pack(format, key, len(data), data))
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f.close()
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def add(self, fcl, fco, fca, fd):
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"""add a new (potentially?) conflicting file the merge state
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fcl: file context for local,
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fco: file context for remote,
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fca: file context for ancestors,
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fd: file path of the resulting merge.
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note: also write the local version to the `.hg/merge` directory.
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"""
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hash = util.sha1(fcl.path()).hexdigest()
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self._repo.vfs.write('merge/' + hash, fcl.data())
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self._state[fd] = ['u', hash, fcl.path(),
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fca.path(), hex(fca.filenode()),
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fco.path(), hex(fco.filenode()),
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fcl.flags()]
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self._dirty = True
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def __contains__(self, dfile):
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return dfile in self._state
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def __getitem__(self, dfile):
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return self._state[dfile][0]
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def __iter__(self):
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return iter(sorted(self._state))
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def files(self):
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return self._state.keys()
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def mark(self, dfile, state):
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self._state[dfile][0] = state
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self._dirty = True
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def unresolved(self):
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"""Obtain the paths of unresolved files."""
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for f, entry in self._state.items():
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if entry[0] == 'u':
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yield f
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def resolve(self, dfile, wctx, labels=None):
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"""rerun merge process for file path `dfile`"""
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if self[dfile] == 'r':
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return 0
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stateentry = self._state[dfile]
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state, hash, lfile, afile, anode, ofile, onode, flags = stateentry
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octx = self._repo[self._other]
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fcd = wctx[dfile]
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fco = octx[ofile]
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fca = self._repo.filectx(afile, fileid=anode)
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# "premerge" x flags
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flo = fco.flags()
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fla = fca.flags()
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if 'x' in flags + flo + fla and 'l' not in flags + flo + fla:
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if fca.node() == nullid:
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self._repo.ui.warn(_('warning: cannot merge flags for %s\n') %
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afile)
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elif flags == fla:
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flags = flo
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# restore local
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f = self._repo.vfs('merge/' + hash)
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self._repo.wwrite(dfile, f.read(), flags)
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f.close()
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r = filemerge.filemerge(self._repo, self._local, lfile, fcd, fco, fca,
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labels=labels)
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if r is None:
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# no real conflict
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del self._state[dfile]
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self._dirty = True
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elif not r:
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self.mark(dfile, 'r')
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return r
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def _checkunknownfile(repo, wctx, mctx, f, f2=None):
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if f2 is None:
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f2 = f
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return (os.path.isfile(repo.wjoin(f))
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and repo.wvfs.audit.check(f)
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and repo.dirstate.normalize(f) not in repo.dirstate
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and mctx[f2].cmp(wctx[f]))
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def _checkunknownfiles(repo, wctx, mctx, force, actions):
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"""
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Considers any actions that care about the presence of conflicting unknown
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files. For some actions, the result is to abort; for others, it is to
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choose a different action.
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"""
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aborts = []
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if not force:
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for f, (m, args, msg) in actions.iteritems():
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if m in ('c', 'dc'):
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if _checkunknownfile(repo, wctx, mctx, f):
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aborts.append(f)
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elif m == 'dg':
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if _checkunknownfile(repo, wctx, mctx, f, args[0]):
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aborts.append(f)
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for f in sorted(aborts):
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repo.ui.warn(_("%s: untracked file differs\n") % f)
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if aborts:
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raise util.Abort(_("untracked files in working directory differ "
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"from files in requested revision"))
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for f, (m, args, msg) in actions.iteritems():
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if m == 'c':
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actions[f] = ('g', args, msg)
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elif m == 'cm':
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fl2, anc = args
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different = _checkunknownfile(repo, wctx, mctx, f)
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if different:
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actions[f] = ('m', (f, f, None, False, anc),
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"remote differs from untracked local")
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else:
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actions[f] = ('g', (fl2,), "remote created")
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def _forgetremoved(wctx, mctx, branchmerge):
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"""
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Forget removed files
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If we're jumping between revisions (as opposed to merging), and if
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neither the working directory nor the target rev has the file,
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then we need to remove it from the dirstate, to prevent the
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dirstate from listing the file when it is no longer in the
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manifest.
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If we're merging, and the other revision has removed a file
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that is not present in the working directory, we need to mark it
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as removed.
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"""
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actions = {}
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m = 'f'
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if branchmerge:
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m = 'r'
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for f in wctx.deleted():
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if f not in mctx:
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actions[f] = m, None, "forget deleted"
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if not branchmerge:
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for f in wctx.removed():
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if f not in mctx:
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actions[f] = 'f', None, "forget removed"
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return actions
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def _checkcollision(repo, wmf, actions):
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# build provisional merged manifest up
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pmmf = set(wmf)
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if actions:
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# k, dr, e and rd are no-op
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for m in 'a', 'f', 'g', 'cd', 'dc':
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for f, args, msg in actions[m]:
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pmmf.add(f)
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for f, args, msg in actions['r']:
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pmmf.discard(f)
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for f, args, msg in actions['dm']:
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f2, flags = args
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pmmf.discard(f2)
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pmmf.add(f)
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for f, args, msg in actions['dg']:
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pmmf.add(f)
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for f, args, msg in actions['m']:
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f1, f2, fa, move, anc = args
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if move:
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pmmf.discard(f1)
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pmmf.add(f)
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# check case-folding collision in provisional merged manifest
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foldmap = {}
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for f in sorted(pmmf):
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fold = util.normcase(f)
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if fold in foldmap:
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raise util.Abort(_("case-folding collision between %s and %s")
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% (f, foldmap[fold]))
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foldmap[fold] = f
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def manifestmerge(repo, wctx, p2, pa, branchmerge, force, partial,
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acceptremote, followcopies):
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"""
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Merge p1 and p2 with ancestor pa and generate merge action list
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branchmerge and force are as passed in to update
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partial = function to filter file lists
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acceptremote = accept the incoming changes without prompting
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"""
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copy, movewithdir, diverge, renamedelete = {}, {}, {}, {}
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# manifests fetched in order are going to be faster, so prime the caches
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[x.manifest() for x in
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sorted(wctx.parents() + [p2, pa], key=lambda x: x.rev())]
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if followcopies:
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ret = copies.mergecopies(repo, wctx, p2, pa)
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copy, movewithdir, diverge, renamedelete = ret
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repo.ui.note(_("resolving manifests\n"))
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repo.ui.debug(" branchmerge: %s, force: %s, partial: %s\n"
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% (bool(branchmerge), bool(force), bool(partial)))
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repo.ui.debug(" ancestor: %s, local: %s, remote: %s\n" % (pa, wctx, p2))
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m1, m2, ma = wctx.manifest(), p2.manifest(), pa.manifest()
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copied = set(copy.values())
|
|
|
copied.update(movewithdir.values())
|
|
|
|
|
|
if '.hgsubstate' in m1:
|
|
|
# check whether sub state is modified
|
|
|
for s in sorted(wctx.substate):
|
|
|
if wctx.sub(s).dirty():
|
|
|
m1['.hgsubstate'] += '+'
|
|
|
break
|
|
|
|
|
|
# Compare manifests
|
|
|
diff = m1.diff(m2)
|
|
|
|
|
|
actions = {}
|
|
|
for f, ((n1, fl1), (n2, fl2)) in diff.iteritems():
|
|
|
if partial and not partial(f):
|
|
|
continue
|
|
|
if n1 and n2: # file exists on both local and remote side
|
|
|
if f not in ma:
|
|
|
fa = copy.get(f, None)
|
|
|
if fa is not None:
|
|
|
actions[f] = ('m', (f, f, fa, False, pa.node()),
|
|
|
"both renamed from " + fa)
|
|
|
else:
|
|
|
actions[f] = ('m', (f, f, None, False, pa.node()),
|
|
|
"both created")
|
|
|
else:
|
|
|
a = ma[f]
|
|
|
fla = ma.flags(f)
|
|
|
nol = 'l' not in fl1 + fl2 + fla
|
|
|
if n2 == a and fl2 == fla:
|
|
|
actions[f] = ('k' , (), "remote unchanged")
|
|
|
elif n1 == a and fl1 == fla: # local unchanged - use remote
|
|
|
if n1 == n2: # optimization: keep local content
|
|
|
actions[f] = ('e', (fl2,), "update permissions")
|
|
|
else:
|
|
|
actions[f] = ('g', (fl2,), "remote is newer")
|
|
|
elif nol and n2 == a: # remote only changed 'x'
|
|
|
actions[f] = ('e', (fl2,), "update permissions")
|
|
|
elif nol and n1 == a: # local only changed 'x'
|
|
|
actions[f] = ('g', (fl1,), "remote is newer")
|
|
|
else: # both changed something
|
|
|
actions[f] = ('m', (f, f, f, False, pa.node()),
|
|
|
"versions differ")
|
|
|
elif n1: # file exists only on local side
|
|
|
if f in copied:
|
|
|
pass # we'll deal with it on m2 side
|
|
|
elif f in movewithdir: # directory rename, move local
|
|
|
f2 = movewithdir[f]
|
|
|
if f2 in m2:
|
|
|
actions[f2] = ('m', (f, f2, None, True, pa.node()),
|
|
|
"remote directory rename, both created")
|
|
|
else:
|
|
|
actions[f2] = ('dm', (f, fl1),
|
|
|
"remote directory rename - move from " + f)
|
|
|
elif f in copy:
|
|
|
f2 = copy[f]
|
|
|
actions[f] = ('m', (f, f2, f2, False, pa.node()),
|
|
|
"local copied/moved from " + f2)
|
|
|
elif f in ma: # clean, a different, no remote
|
|
|
if n1 != ma[f]:
|
|
|
if acceptremote:
|
|
|
actions[f] = ('r', None, "remote delete")
|
|
|
else:
|
|
|
actions[f] = ('cd', None, "prompt changed/deleted")
|
|
|
elif n1[20:] == 'a':
|
|
|
# This extra 'a' is added by working copy manifest to mark
|
|
|
# the file as locally added. We should forget it instead of
|
|
|
# deleting it.
|
|
|
actions[f] = ('f', None, "remote deleted")
|
|
|
else:
|
|
|
actions[f] = ('r', None, "other deleted")
|
|
|
elif n2: # file exists only on remote side
|
|
|
if f in copied:
|
|
|
pass # we'll deal with it on m1 side
|
|
|
elif f in movewithdir:
|
|
|
f2 = movewithdir[f]
|
|
|
if f2 in m1:
|
|
|
actions[f2] = ('m', (f2, f, None, False, pa.node()),
|
|
|
"local directory rename, both created")
|
|
|
else:
|
|
|
actions[f2] = ('dg', (f, fl2),
|
|
|
"local directory rename - get from " + f)
|
|
|
elif f in copy:
|
|
|
f2 = copy[f]
|
|
|
if f2 in m2:
|
|
|
actions[f] = ('m', (f2, f, f2, False, pa.node()),
|
|
|
"remote copied from " + f2)
|
|
|
else:
|
|
|
actions[f] = ('m', (f2, f, f2, True, pa.node()),
|
|
|
"remote moved from " + f2)
|
|
|
elif f not in ma:
|
|
|
# local unknown, remote created: the logic is described by the
|
|
|
# following table:
|
|
|
#
|
|
|
# force branchmerge different | action
|
|
|
# n * * | create
|
|
|
# y n * | create
|
|
|
# y y n | create
|
|
|
# y y y | merge
|
|
|
#
|
|
|
# Checking whether the files are different is expensive, so we
|
|
|
# don't do that when we can avoid it.
|
|
|
if not force:
|
|
|
actions[f] = ('c', (fl2,), "remote created")
|
|
|
elif not branchmerge:
|
|
|
actions[f] = ('c', (fl2,), "remote created")
|
|
|
else:
|
|
|
actions[f] = ('cm', (fl2, pa.node()),
|
|
|
"remote created, get or merge")
|
|
|
elif n2 != ma[f]:
|
|
|
if acceptremote:
|
|
|
actions[f] = ('c', (fl2,), "remote recreating")
|
|
|
else:
|
|
|
actions[f] = ('dc', (fl2,), "prompt deleted/changed")
|
|
|
|
|
|
return actions, diverge, renamedelete
|
|
|
|
|
|
def _resolvetrivial(repo, wctx, mctx, ancestor, actions):
|
|
|
"""Resolves false conflicts where the nodeid changed but the content
|
|
|
remained the same."""
|
|
|
|
|
|
for f, (m, args, msg) in actions.items():
|
|
|
if m == 'cd' and f in ancestor and not wctx[f].cmp(ancestor[f]):
|
|
|
# local did change but ended up with same content
|
|
|
actions[f] = 'r', None, "prompt same"
|
|
|
elif m == 'dc' and f in ancestor and not mctx[f].cmp(ancestor[f]):
|
|
|
# remote did change but ended up with same content
|
|
|
del actions[f] # don't get = keep local deleted
|
|
|
|
|
|
def calculateupdates(repo, wctx, mctx, ancestors, branchmerge, force, partial,
|
|
|
acceptremote, followcopies):
|
|
|
"Calculate the actions needed to merge mctx into wctx using ancestors"
|
|
|
|
|
|
if len(ancestors) == 1: # default
|
|
|
actions, diverge, renamedelete = manifestmerge(
|
|
|
repo, wctx, mctx, ancestors[0], branchmerge, force, partial,
|
|
|
acceptremote, followcopies)
|
|
|
_checkunknownfiles(repo, wctx, mctx, force, actions)
|
|
|
|
|
|
else: # only when merge.preferancestor=* - the default
|
|
|
repo.ui.note(
|
|
|
_("note: merging %s and %s using bids from ancestors %s\n") %
|
|
|
(wctx, mctx, _(' and ').join(str(anc) for anc in ancestors)))
|
|
|
|
|
|
# Call for bids
|
|
|
fbids = {} # mapping filename to bids (action method to list af actions)
|
|
|
diverge, renamedelete = None, None
|
|
|
for ancestor in ancestors:
|
|
|
repo.ui.note(_('\ncalculating bids for ancestor %s\n') % ancestor)
|
|
|
actions, diverge1, renamedelete1 = manifestmerge(
|
|
|
repo, wctx, mctx, ancestor, branchmerge, force, partial,
|
|
|
acceptremote, followcopies)
|
|
|
_checkunknownfiles(repo, wctx, mctx, force, actions)
|
|
|
if diverge is None: # and renamedelete is None.
|
|
|
# Arbitrarily pick warnings from first iteration
|
|
|
diverge = diverge1
|
|
|
renamedelete = renamedelete1
|
|
|
for f, a in sorted(actions.iteritems()):
|
|
|
m, args, msg = a
|
|
|
repo.ui.debug(' %s: %s -> %s\n' % (f, msg, m))
|
|
|
if f in fbids:
|
|
|
d = fbids[f]
|
|
|
if m in d:
|
|
|
d[m].append(a)
|
|
|
else:
|
|
|
d[m] = [a]
|
|
|
else:
|
|
|
fbids[f] = {m: [a]}
|
|
|
|
|
|
# Pick the best bid for each file
|
|
|
repo.ui.note(_('\nauction for merging merge bids\n'))
|
|
|
actions = {}
|
|
|
for f, bids in sorted(fbids.items()):
|
|
|
# bids is a mapping from action method to list af actions
|
|
|
# Consensus?
|
|
|
if len(bids) == 1: # all bids are the same kind of method
|
|
|
m, l = bids.items()[0]
|
|
|
if util.all(a == l[0] for a in l[1:]): # len(bids) is > 1
|
|
|
repo.ui.note(" %s: consensus for %s\n" % (f, m))
|
|
|
actions[f] = l[0]
|
|
|
continue
|
|
|
# If keep is an option, just do it.
|
|
|
if 'k' in bids:
|
|
|
repo.ui.note(" %s: picking 'keep' action\n" % f)
|
|
|
actions[f] = bids['k'][0]
|
|
|
continue
|
|
|
# If there are gets and they all agree [how could they not?], do it.
|
|
|
if 'g' in bids:
|
|
|
ga0 = bids['g'][0]
|
|
|
if util.all(a == ga0 for a in bids['g'][1:]):
|
|
|
repo.ui.note(" %s: picking 'get' action\n" % f)
|
|
|
actions[f] = ga0
|
|
|
continue
|
|
|
# TODO: Consider other simple actions such as mode changes
|
|
|
# Handle inefficient democrazy.
|
|
|
repo.ui.note(_(' %s: multiple bids for merge action:\n') % f)
|
|
|
for m, l in sorted(bids.items()):
|
|
|
for _f, args, msg in l:
|
|
|
repo.ui.note(' %s -> %s\n' % (msg, m))
|
|
|
# Pick random action. TODO: Instead, prompt user when resolving
|
|
|
m, l = bids.items()[0]
|
|
|
repo.ui.warn(_(' %s: ambiguous merge - picked %s action\n') %
|
|
|
(f, m))
|
|
|
actions[f] = l[0]
|
|
|
continue
|
|
|
repo.ui.note(_('end of auction\n\n'))
|
|
|
|
|
|
_resolvetrivial(repo, wctx, mctx, ancestors[0], actions)
|
|
|
|
|
|
if wctx.rev() is None:
|
|
|
fractions = _forgetremoved(wctx, mctx, branchmerge)
|
|
|
actions.update(fractions)
|
|
|
|
|
|
return actions, diverge, renamedelete
|
|
|
|
|
|
def batchremove(repo, actions):
|
|
|
"""apply removes to the working directory
|
|
|
|
|
|
yields tuples for progress updates
|
|
|
"""
|
|
|
verbose = repo.ui.verbose
|
|
|
unlink = util.unlinkpath
|
|
|
wjoin = repo.wjoin
|
|
|
audit = repo.wvfs.audit
|
|
|
i = 0
|
|
|
for f, args, msg in actions:
|
|
|
repo.ui.debug(" %s: %s -> r\n" % (f, msg))
|
|
|
if verbose:
|
|
|
repo.ui.note(_("removing %s\n") % f)
|
|
|
audit(f)
|
|
|
try:
|
|
|
unlink(wjoin(f), ignoremissing=True)
|
|
|
except OSError, inst:
|
|
|
repo.ui.warn(_("update failed to remove %s: %s!\n") %
|
|
|
(f, inst.strerror))
|
|
|
if i == 100:
|
|
|
yield i, f
|
|
|
i = 0
|
|
|
i += 1
|
|
|
if i > 0:
|
|
|
yield i, f
|
|
|
|
|
|
def batchget(repo, mctx, actions):
|
|
|
"""apply gets to the working directory
|
|
|
|
|
|
mctx is the context to get from
|
|
|
|
|
|
yields tuples for progress updates
|
|
|
"""
|
|
|
verbose = repo.ui.verbose
|
|
|
fctx = mctx.filectx
|
|
|
wwrite = repo.wwrite
|
|
|
i = 0
|
|
|
for f, args, msg in actions:
|
|
|
repo.ui.debug(" %s: %s -> g\n" % (f, msg))
|
|
|
if verbose:
|
|
|
repo.ui.note(_("getting %s\n") % f)
|
|
|
wwrite(f, fctx(f).data(), args[0])
|
|
|
if i == 100:
|
|
|
yield i, f
|
|
|
i = 0
|
|
|
i += 1
|
|
|
if i > 0:
|
|
|
yield i, f
|
|
|
|
|
|
def applyupdates(repo, actions, wctx, mctx, overwrite, labels=None):
|
|
|
"""apply the merge action list to the working directory
|
|
|
|
|
|
wctx is the working copy context
|
|
|
mctx is the context to be merged into the working copy
|
|
|
|
|
|
Return a tuple of counts (updated, merged, removed, unresolved) that
|
|
|
describes how many files were affected by the update.
|
|
|
"""
|
|
|
|
|
|
updated, merged, removed, unresolved = 0, 0, 0, 0
|
|
|
ms = mergestate(repo)
|
|
|
ms.reset(wctx.p1().node(), mctx.node())
|
|
|
moves = []
|
|
|
for m, l in actions.items():
|
|
|
l.sort()
|
|
|
|
|
|
# prescan for merges
|
|
|
for f, args, msg in actions['m']:
|
|
|
f1, f2, fa, move, anc = args
|
|
|
if f == '.hgsubstate': # merged internally
|
|
|
continue
|
|
|
repo.ui.debug(" preserving %s for resolve of %s\n" % (f1, f))
|
|
|
fcl = wctx[f1]
|
|
|
fco = mctx[f2]
|
|
|
actx = repo[anc]
|
|
|
if fa in actx:
|
|
|
fca = actx[fa]
|
|
|
else:
|
|
|
fca = repo.filectx(f1, fileid=nullrev)
|
|
|
ms.add(fcl, fco, fca, f)
|
|
|
if f1 != f and move:
|
|
|
moves.append(f1)
|
|
|
|
|
|
audit = repo.wvfs.audit
|
|
|
_updating = _('updating')
|
|
|
_files = _('files')
|
|
|
progress = repo.ui.progress
|
|
|
|
|
|
# remove renamed files after safely stored
|
|
|
for f in moves:
|
|
|
if os.path.lexists(repo.wjoin(f)):
|
|
|
repo.ui.debug("removing %s\n" % f)
|
|
|
audit(f)
|
|
|
util.unlinkpath(repo.wjoin(f))
|
|
|
|
|
|
numupdates = sum(len(l) for m, l in actions.items() if m != 'k')
|
|
|
|
|
|
def dirtysubstate():
|
|
|
# mark '.hgsubstate' as possibly dirty forcibly, because
|
|
|
# modified '.hgsubstate' is misunderstood as clean,
|
|
|
# when both st_size/st_mtime of '.hgsubstate' aren't changed,
|
|
|
# even if "submerge" fails and '.hgsubstate' is inconsistent
|
|
|
repo.dirstate.normallookup('.hgsubstate')
|
|
|
|
|
|
if [a for a in actions['r'] if a[0] == '.hgsubstate']:
|
|
|
dirtysubstate()
|
|
|
subrepo.submerge(repo, wctx, mctx, wctx, overwrite)
|
|
|
|
|
|
# remove in parallel (must come first)
|
|
|
z = 0
|
|
|
prog = worker.worker(repo.ui, 0.001, batchremove, (repo,), actions['r'])
|
|
|
for i, item in prog:
|
|
|
z += i
|
|
|
progress(_updating, z, item=item, total=numupdates, unit=_files)
|
|
|
removed = len(actions['r'])
|
|
|
|
|
|
# get in parallel
|
|
|
prog = worker.worker(repo.ui, 0.001, batchget, (repo, mctx), actions['g'])
|
|
|
for i, item in prog:
|
|
|
z += i
|
|
|
progress(_updating, z, item=item, total=numupdates, unit=_files)
|
|
|
updated = len(actions['g'])
|
|
|
|
|
|
if [a for a in actions['g'] if a[0] == '.hgsubstate']:
|
|
|
dirtysubstate()
|
|
|
subrepo.submerge(repo, wctx, mctx, wctx, overwrite)
|
|
|
|
|
|
# forget (manifest only, just log it) (must come first)
|
|
|
for f, args, msg in actions['f']:
|
|
|
repo.ui.debug(" %s: %s -> f\n" % (f, msg))
|
|
|
z += 1
|
|
|
progress(_updating, z, item=f, total=numupdates, unit=_files)
|
|
|
|
|
|
# re-add (manifest only, just log it)
|
|
|
for f, args, msg in actions['a']:
|
|
|
repo.ui.debug(" %s: %s -> a\n" % (f, msg))
|
|
|
z += 1
|
|
|
progress(_updating, z, item=f, total=numupdates, unit=_files)
|
|
|
|
|
|
# keep (noop, just log it)
|
|
|
for f, args, msg in actions['k']:
|
|
|
repo.ui.debug(" %s: %s -> k\n" % (f, msg))
|
|
|
# no progress
|
|
|
|
|
|
# merge
|
|
|
for f, args, msg in actions['m']:
|
|
|
repo.ui.debug(" %s: %s -> m\n" % (f, msg))
|
|
|
z += 1
|
|
|
progress(_updating, z, item=f, total=numupdates, unit=_files)
|
|
|
if f == '.hgsubstate': # subrepo states need updating
|
|
|
dirtysubstate()
|
|
|
subrepo.submerge(repo, wctx, mctx, wctx.ancestor(mctx),
|
|
|
overwrite)
|
|
|
continue
|
|
|
audit(f)
|
|
|
r = ms.resolve(f, wctx, labels=labels)
|
|
|
if r is not None and r > 0:
|
|
|
unresolved += 1
|
|
|
else:
|
|
|
if r is None:
|
|
|
updated += 1
|
|
|
else:
|
|
|
merged += 1
|
|
|
|
|
|
# directory rename, move local
|
|
|
for f, args, msg in actions['dm']:
|
|
|
repo.ui.debug(" %s: %s -> dm\n" % (f, msg))
|
|
|
z += 1
|
|
|
progress(_updating, z, item=f, total=numupdates, unit=_files)
|
|
|
f0, flags = args
|
|
|
repo.ui.note(_("moving %s to %s\n") % (f0, f))
|
|
|
audit(f)
|
|
|
repo.wwrite(f, wctx.filectx(f0).data(), flags)
|
|
|
util.unlinkpath(repo.wjoin(f0))
|
|
|
updated += 1
|
|
|
|
|
|
# local directory rename, get
|
|
|
for f, args, msg in actions['dg']:
|
|
|
repo.ui.debug(" %s: %s -> dg\n" % (f, msg))
|
|
|
z += 1
|
|
|
progress(_updating, z, item=f, total=numupdates, unit=_files)
|
|
|
f0, flags = args
|
|
|
repo.ui.note(_("getting %s to %s\n") % (f0, f))
|
|
|
repo.wwrite(f, mctx.filectx(f0).data(), flags)
|
|
|
updated += 1
|
|
|
|
|
|
# exec
|
|
|
for f, args, msg in actions['e']:
|
|
|
repo.ui.debug(" %s: %s -> e\n" % (f, msg))
|
|
|
z += 1
|
|
|
progress(_updating, z, item=f, total=numupdates, unit=_files)
|
|
|
flags, = args
|
|
|
audit(f)
|
|
|
util.setflags(repo.wjoin(f), 'l' in flags, 'x' in flags)
|
|
|
updated += 1
|
|
|
|
|
|
ms.commit()
|
|
|
progress(_updating, None, total=numupdates, unit=_files)
|
|
|
|
|
|
return updated, merged, removed, unresolved
|
|
|
|
|
|
def recordupdates(repo, actions, branchmerge):
|
|
|
"record merge actions to the dirstate"
|
|
|
# remove (must come first)
|
|
|
for f, args, msg in actions['r']:
|
|
|
if branchmerge:
|
|
|
repo.dirstate.remove(f)
|
|
|
else:
|
|
|
repo.dirstate.drop(f)
|
|
|
|
|
|
# forget (must come first)
|
|
|
for f, args, msg in actions['f']:
|
|
|
repo.dirstate.drop(f)
|
|
|
|
|
|
# re-add
|
|
|
for f, args, msg in actions['a']:
|
|
|
if not branchmerge:
|
|
|
repo.dirstate.add(f)
|
|
|
|
|
|
# exec change
|
|
|
for f, args, msg in actions['e']:
|
|
|
repo.dirstate.normallookup(f)
|
|
|
|
|
|
# keep
|
|
|
for f, args, msg in actions['k']:
|
|
|
pass
|
|
|
|
|
|
# get
|
|
|
for f, args, msg in actions['g']:
|
|
|
if branchmerge:
|
|
|
repo.dirstate.otherparent(f)
|
|
|
else:
|
|
|
repo.dirstate.normal(f)
|
|
|
|
|
|
# merge
|
|
|
for f, args, msg in actions['m']:
|
|
|
f1, f2, fa, move, anc = args
|
|
|
if branchmerge:
|
|
|
# We've done a branch merge, mark this file as merged
|
|
|
# so that we properly record the merger later
|
|
|
repo.dirstate.merge(f)
|
|
|
if f1 != f2: # copy/rename
|
|
|
if move:
|
|
|
repo.dirstate.remove(f1)
|
|
|
if f1 != f:
|
|
|
repo.dirstate.copy(f1, f)
|
|
|
else:
|
|
|
repo.dirstate.copy(f2, f)
|
|
|
else:
|
|
|
# We've update-merged a locally modified file, so
|
|
|
# we set the dirstate to emulate a normal checkout
|
|
|
# of that file some time in the past. Thus our
|
|
|
# merge will appear as a normal local file
|
|
|
# modification.
|
|
|
if f2 == f: # file not locally copied/moved
|
|
|
repo.dirstate.normallookup(f)
|
|
|
if move:
|
|
|
repo.dirstate.drop(f1)
|
|
|
|
|
|
# directory rename, move local
|
|
|
for f, args, msg in actions['dm']:
|
|
|
f0, flag = args
|
|
|
if branchmerge:
|
|
|
repo.dirstate.add(f)
|
|
|
repo.dirstate.remove(f0)
|
|
|
repo.dirstate.copy(f0, f)
|
|
|
else:
|
|
|
repo.dirstate.normal(f)
|
|
|
repo.dirstate.drop(f0)
|
|
|
|
|
|
# directory rename, get
|
|
|
for f, args, msg in actions['dg']:
|
|
|
f0, flag = args
|
|
|
if branchmerge:
|
|
|
repo.dirstate.add(f)
|
|
|
repo.dirstate.copy(f0, f)
|
|
|
else:
|
|
|
repo.dirstate.normal(f)
|
|
|
|
|
|
def update(repo, node, branchmerge, force, partial, ancestor=None,
|
|
|
mergeancestor=False, labels=None):
|
|
|
"""
|
|
|
Perform a merge between the working directory and the given node
|
|
|
|
|
|
node = the node to update to, or None if unspecified
|
|
|
branchmerge = whether to merge between branches
|
|
|
force = whether to force branch merging or file overwriting
|
|
|
partial = a function to filter file lists (dirstate not updated)
|
|
|
mergeancestor = whether it is merging with an ancestor. If true,
|
|
|
we should accept the incoming changes for any prompts that occur.
|
|
|
If false, merging with an ancestor (fast-forward) is only allowed
|
|
|
between different named branches. This flag is used by rebase extension
|
|
|
as a temporary fix and should be avoided in general.
|
|
|
|
|
|
The table below shows all the behaviors of the update command
|
|
|
given the -c and -C or no options, whether the working directory
|
|
|
is dirty, whether a revision is specified, and the relationship of
|
|
|
the parent rev to the target rev (linear, on the same named
|
|
|
branch, or on another named branch).
|
|
|
|
|
|
This logic is tested by test-update-branches.t.
|
|
|
|
|
|
-c -C dirty rev | linear same cross
|
|
|
n n n n | ok (1) x
|
|
|
n n n y | ok ok ok
|
|
|
n n y n | merge (2) (2)
|
|
|
n n y y | merge (3) (3)
|
|
|
n y * * | --- discard ---
|
|
|
y n y * | --- (4) ---
|
|
|
y n n * | --- ok ---
|
|
|
y y * * | --- (5) ---
|
|
|
|
|
|
x = can't happen
|
|
|
* = don't-care
|
|
|
1 = abort: not a linear update (merge or update --check to force update)
|
|
|
2 = abort: uncommitted changes (commit and merge, or update --clean to
|
|
|
discard changes)
|
|
|
3 = abort: uncommitted changes (commit or update --clean to discard changes)
|
|
|
4 = abort: uncommitted changes (checked in commands.py)
|
|
|
5 = incompatible options (checked in commands.py)
|
|
|
|
|
|
Return the same tuple as applyupdates().
|
|
|
"""
|
|
|
|
|
|
onode = node
|
|
|
wlock = repo.wlock()
|
|
|
try:
|
|
|
wc = repo[None]
|
|
|
pl = wc.parents()
|
|
|
p1 = pl[0]
|
|
|
pas = [None]
|
|
|
if ancestor is not None:
|
|
|
pas = [repo[ancestor]]
|
|
|
|
|
|
if node is None:
|
|
|
# Here is where we should consider bookmarks, divergent bookmarks,
|
|
|
# foreground changesets (successors), and tip of current branch;
|
|
|
# but currently we are only checking the branch tips.
|
|
|
try:
|
|
|
node = repo.branchtip(wc.branch())
|
|
|
except errormod.RepoLookupError:
|
|
|
if wc.branch() == 'default': # no default branch!
|
|
|
node = repo.lookup('tip') # update to tip
|
|
|
else:
|
|
|
raise util.Abort(_("branch %s not found") % wc.branch())
|
|
|
|
|
|
if p1.obsolete() and not p1.children():
|
|
|
# allow updating to successors
|
|
|
successors = obsolete.successorssets(repo, p1.node())
|
|
|
|
|
|
# behavior of certain cases is as follows,
|
|
|
#
|
|
|
# divergent changesets: update to highest rev, similar to what
|
|
|
# is currently done when there are more than one head
|
|
|
# (i.e. 'tip')
|
|
|
#
|
|
|
# replaced changesets: same as divergent except we know there
|
|
|
# is no conflict
|
|
|
#
|
|
|
# pruned changeset: no update is done; though, we could
|
|
|
# consider updating to the first non-obsolete parent,
|
|
|
# similar to what is current done for 'hg prune'
|
|
|
|
|
|
if successors:
|
|
|
# flatten the list here handles both divergent (len > 1)
|
|
|
# and the usual case (len = 1)
|
|
|
successors = [n for sub in successors for n in sub]
|
|
|
|
|
|
# get the max revision for the given successors set,
|
|
|
# i.e. the 'tip' of a set
|
|
|
node = repo.revs('max(%ln)', successors).first()
|
|
|
pas = [p1]
|
|
|
|
|
|
overwrite = force and not branchmerge
|
|
|
|
|
|
p2 = repo[node]
|
|
|
if pas[0] is None:
|
|
|
if repo.ui.config('merge', 'preferancestor', '*') == '*':
|
|
|
cahs = repo.changelog.commonancestorsheads(p1.node(), p2.node())
|
|
|
pas = [repo[anc] for anc in (sorted(cahs) or [nullid])]
|
|
|
else:
|
|
|
pas = [p1.ancestor(p2, warn=branchmerge)]
|
|
|
|
|
|
fp1, fp2, xp1, xp2 = p1.node(), p2.node(), str(p1), str(p2)
|
|
|
|
|
|
### check phase
|
|
|
if not overwrite and len(pl) > 1:
|
|
|
raise util.Abort(_("outstanding uncommitted merge"))
|
|
|
if branchmerge:
|
|
|
if pas == [p2]:
|
|
|
raise util.Abort(_("merging with a working directory ancestor"
|
|
|
" has no effect"))
|
|
|
elif pas == [p1]:
|
|
|
if not mergeancestor and p1.branch() == p2.branch():
|
|
|
raise util.Abort(_("nothing to merge"),
|
|
|
hint=_("use 'hg update' "
|
|
|
"or check 'hg heads'"))
|
|
|
if not force and (wc.files() or wc.deleted()):
|
|
|
raise util.Abort(_("uncommitted changes"),
|
|
|
hint=_("use 'hg status' to list changes"))
|
|
|
for s in sorted(wc.substate):
|
|
|
wc.sub(s).bailifchanged()
|
|
|
|
|
|
elif not overwrite:
|
|
|
if p1 == p2: # no-op update
|
|
|
# call the hooks and exit early
|
|
|
repo.hook('preupdate', throw=True, parent1=xp2, parent2='')
|
|
|
repo.hook('update', parent1=xp2, parent2='', error=0)
|
|
|
return 0, 0, 0, 0
|
|
|
|
|
|
if pas not in ([p1], [p2]): # nonlinear
|
|
|
dirty = wc.dirty(missing=True)
|
|
|
if dirty or onode is None:
|
|
|
# Branching is a bit strange to ensure we do the minimal
|
|
|
# amount of call to obsolete.background.
|
|
|
foreground = obsolete.foreground(repo, [p1.node()])
|
|
|
# note: the <node> variable contains a random identifier
|
|
|
if repo[node].node() in foreground:
|
|
|
pas = [p1] # allow updating to successors
|
|
|
elif dirty:
|
|
|
msg = _("uncommitted changes")
|
|
|
if onode is None:
|
|
|
hint = _("commit and merge, or update --clean to"
|
|
|
" discard changes")
|
|
|
else:
|
|
|
hint = _("commit or update --clean to discard"
|
|
|
" changes")
|
|
|
raise util.Abort(msg, hint=hint)
|
|
|
else: # node is none
|
|
|
msg = _("not a linear update")
|
|
|
hint = _("merge or update --check to force update")
|
|
|
raise util.Abort(msg, hint=hint)
|
|
|
else:
|
|
|
# Allow jumping branches if clean and specific rev given
|
|
|
pas = [p1]
|
|
|
|
|
|
followcopies = False
|
|
|
if overwrite:
|
|
|
pas = [wc]
|
|
|
elif pas == [p2]: # backwards
|
|
|
pas = [wc.p1()]
|
|
|
elif not branchmerge and not wc.dirty(missing=True):
|
|
|
pass
|
|
|
elif pas[0] and repo.ui.configbool('merge', 'followcopies', True):
|
|
|
followcopies = True
|
|
|
|
|
|
### calculate phase
|
|
|
actionbyfile, diverge, renamedelete = calculateupdates(
|
|
|
repo, wc, p2, pas, branchmerge, force, partial, mergeancestor,
|
|
|
followcopies)
|
|
|
# Convert to dictionary-of-lists format
|
|
|
actions = dict((m, []) for m in 'a f g cd dc r dm dg m e k'.split())
|
|
|
for f, (m, args, msg) in actionbyfile.iteritems():
|
|
|
if m not in actions:
|
|
|
actions[m] = []
|
|
|
actions[m].append((f, args, msg))
|
|
|
|
|
|
if not util.checkcase(repo.path):
|
|
|
# check collision between files only in p2 for clean update
|
|
|
if (not branchmerge and
|
|
|
(force or not wc.dirty(missing=True, branch=False))):
|
|
|
_checkcollision(repo, p2.manifest(), None)
|
|
|
else:
|
|
|
_checkcollision(repo, wc.manifest(), actions)
|
|
|
|
|
|
# Prompt and create actions. TODO: Move this towards resolve phase.
|
|
|
for f, args, msg in sorted(actions['cd']):
|
|
|
if repo.ui.promptchoice(
|
|
|
_("local changed %s which remote deleted\n"
|
|
|
"use (c)hanged version or (d)elete?"
|
|
|
"$$ &Changed $$ &Delete") % f, 0):
|
|
|
actions['r'].append((f, None, "prompt delete"))
|
|
|
else:
|
|
|
actions['a'].append((f, None, "prompt keep"))
|
|
|
del actions['cd'][:]
|
|
|
|
|
|
for f, args, msg in sorted(actions['dc']):
|
|
|
flags, = args
|
|
|
if repo.ui.promptchoice(
|
|
|
_("remote changed %s which local deleted\n"
|
|
|
"use (c)hanged version or leave (d)eleted?"
|
|
|
"$$ &Changed $$ &Deleted") % f, 0) == 0:
|
|
|
actions['g'].append((f, (flags,), "prompt recreating"))
|
|
|
del actions['dc'][:]
|
|
|
|
|
|
### apply phase
|
|
|
if not branchmerge: # just jump to the new rev
|
|
|
fp1, fp2, xp1, xp2 = fp2, nullid, xp2, ''
|
|
|
if not partial:
|
|
|
repo.hook('preupdate', throw=True, parent1=xp1, parent2=xp2)
|
|
|
# note that we're in the middle of an update
|
|
|
repo.vfs.write('updatestate', p2.hex())
|
|
|
|
|
|
stats = applyupdates(repo, actions, wc, p2, overwrite, labels=labels)
|
|
|
|
|
|
# divergent renames
|
|
|
for f, fl in sorted(diverge.iteritems()):
|
|
|
repo.ui.warn(_("note: possible conflict - %s was renamed "
|
|
|
"multiple times to:\n") % f)
|
|
|
for nf in fl:
|
|
|
repo.ui.warn(" %s\n" % nf)
|
|
|
|
|
|
# rename and delete
|
|
|
for f, fl in sorted(renamedelete.iteritems()):
|
|
|
repo.ui.warn(_("note: possible conflict - %s was deleted "
|
|
|
"and renamed to:\n") % f)
|
|
|
for nf in fl:
|
|
|
repo.ui.warn(" %s\n" % nf)
|
|
|
|
|
|
if not partial:
|
|
|
repo.dirstate.beginparentchange()
|
|
|
repo.setparents(fp1, fp2)
|
|
|
recordupdates(repo, actions, branchmerge)
|
|
|
# update completed, clear state
|
|
|
util.unlink(repo.join('updatestate'))
|
|
|
|
|
|
if not branchmerge:
|
|
|
repo.dirstate.setbranch(p2.branch())
|
|
|
repo.dirstate.endparentchange()
|
|
|
finally:
|
|
|
wlock.release()
|
|
|
|
|
|
if not partial:
|
|
|
repo.hook('update', parent1=xp1, parent2=xp2, error=stats[3])
|
|
|
return stats
|
|
|
|
|
|
def graft(repo, ctx, pctx, labels):
|
|
|
"""Do a graft-like merge.
|
|
|
|
|
|
This is a merge where the merge ancestor is chosen such that one
|
|
|
or more changesets are grafted onto the current changeset. In
|
|
|
addition to the merge, this fixes up the dirstate to include only
|
|
|
a single parent and tries to duplicate any renames/copies
|
|
|
appropriately.
|
|
|
|
|
|
ctx - changeset to rebase
|
|
|
pctx - merge base, usually ctx.p1()
|
|
|
labels - merge labels eg ['local', 'graft']
|
|
|
|
|
|
"""
|
|
|
# If we're grafting a descendant onto an ancestor, be sure to pass
|
|
|
# mergeancestor=True to update. This does two things: 1) allows the merge if
|
|
|
# the destination is the same as the parent of the ctx (so we can use graft
|
|
|
# to copy commits), and 2) informs update that the incoming changes are
|
|
|
# newer than the destination so it doesn't prompt about "remote changed foo
|
|
|
# which local deleted".
|
|
|
mergeancestor = repo.changelog.isancestor(repo['.'].node(), ctx.node())
|
|
|
|
|
|
stats = update(repo, ctx.node(), True, True, False, pctx.node(),
|
|
|
mergeancestor=mergeancestor, labels=labels)
|
|
|
|
|
|
# drop the second merge parent
|
|
|
repo.dirstate.beginparentchange()
|
|
|
repo.setparents(repo['.'].node(), nullid)
|
|
|
repo.dirstate.write()
|
|
|
# fix up dirstate for copies and renames
|
|
|
copies.duplicatecopies(repo, ctx.rev(), pctx.rev())
|
|
|
repo.dirstate.endparentchange()
|
|
|
return stats
|
|
|
|
