author | Bryan O'Sullivan <bryano@fb.com> |
Fri, 30 Nov 2012 15:56:09 -0800 | |
changeset 18020 | ec02eef0b686 |
parent 18001 | e02feadd15ea |
child 18068 | 4bec77e62c00 |
permissions | -rw-r--r-- |
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# obsolete.py - obsolete markers handling |
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# |
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# Copyright 2012 Pierre-Yves David <pierre-yves.david@ens-lyon.org> |
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# Logilab SA <contact@logilab.fr> |
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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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"""Obsolete markers handling |
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An obsolete marker maps an old changeset to a list of new |
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changesets. If the list of new changesets is empty, the old changeset |
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is said to be "killed". Otherwise, the old changeset is being |
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"replaced" by the new changesets. |
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Obsolete markers can be used to record and distribute changeset graph |
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transformations performed by history rewriting operations, and help |
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building new tools to reconciliate conflicting rewriting actions. To |
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facilitate conflicts resolution, markers include various annotations |
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besides old and news changeset identifiers, such as creation date or |
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author name. |
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The old obsoleted changeset is called "precursor" and possible replacements are |
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called "successors". Markers that used changeset X as a precursors are called |
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"successor markers of X" because they hold information about the successors of |
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X. Markers that use changeset Y as a successors are call "precursor markers of |
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Y" because they hold information about the precursors of Y. |
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Examples: |
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- When changeset A is replacement by a changeset A', one marker is stored: |
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(A, (A')) |
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- When changesets A and B are folded into a new changeset C two markers are |
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stored: |
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(A, (C,)) and (B, (C,)) |
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- When changeset A is simply "pruned" from the graph, a marker in create: |
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(A, ()) |
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- When changeset A is split into B and C, a single marker are used: |
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(A, (C, C)) |
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We use a single marker to distinct the "split" case from the "divergence" |
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case. If two independants operation rewrite the same changeset A in to A' and |
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A'' when have an error case: divergent rewriting. We can detect it because |
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two markers will be created independently: |
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(A, (B,)) and (A, (C,)) |
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Format |
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------ |
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Markers are stored in an append-only file stored in |
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'.hg/store/obsstore'. |
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The file starts with a version header: |
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- 1 unsigned byte: version number, starting at zero. |
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The header is followed by the markers. Each marker is made of: |
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- 1 unsigned byte: number of new changesets "R", could be zero. |
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- 1 unsigned 32-bits integer: metadata size "M" in bytes. |
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- 1 byte: a bit field. It is reserved for flags used in obsolete |
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markers common operations, to avoid repeated decoding of metadata |
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entries. |
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- 20 bytes: obsoleted changeset identifier. |
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- N*20 bytes: new changesets identifiers. |
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- M bytes: metadata as a sequence of nul-terminated strings. Each |
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string contains a key and a value, separated by a color ':', without |
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additional encoding. Keys cannot contain '\0' or ':' and values |
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cannot contain '\0'. |
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""" |
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import struct |
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import util, base85, node |
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from i18n import _ |
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_pack = struct.pack |
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_unpack = struct.unpack |
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_SEEK_END = 2 # os.SEEK_END was introduced in Python 2.5 |
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# the obsolete feature is not mature enough to be enabled by default. |
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# you have to rely on third party extension extension to enable this. |
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_enabled = False |
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# data used for parsing and writing |
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_fmversion = 0 |
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_fmfixed = '>BIB20s' |
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_fmnode = '20s' |
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_fmfsize = struct.calcsize(_fmfixed) |
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_fnodesize = struct.calcsize(_fmnode) |
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### obsolescence marker flag |
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## bumpedfix flag |
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# |
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# When a changeset A' succeed to a changeset A which became public, we call A' |
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# "bumped" because it's a successors of a public changesets |
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# |
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# o A' (bumped) |
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# |`: |
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# | o A |
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# |/ |
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# o Z |
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# |
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# The way to solve this situation is to create a new changeset Ad as children |
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# of A. This changeset have the same content than A'. So the diff from A to A' |
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# is the same than the diff from A to Ad. Ad is marked as a successors of A' |
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# |
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# o Ad |
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123 |
# |`: |
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# | x A' |
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# |'| |
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126 |
# o | A |
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# |/ |
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128 |
# o Z |
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# |
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# But by transitivity Ad is also a successors of A. To avoid having Ad marked |
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# as bumped too, we add the `bumpedfix` flag to the marker. <A', (Ad,)>. |
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# This flag mean that the successors are an interdiff that fix the bumped |
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# situation, breaking the transitivity of "bumped" here. |
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bumpedfix = 1 |
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135 |
|
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def _readmarkers(data): |
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"""Read and enumerate markers from raw data""" |
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off = 0 |
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diskversion = _unpack('>B', data[off:off + 1])[0] |
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off += 1 |
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141 |
if diskversion != _fmversion: |
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raise util.Abort(_('parsing obsolete marker: unknown version %r') |
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% diskversion) |
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144 |
|
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145 |
# Loop on markers |
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l = len(data) |
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while off + _fmfsize <= l: |
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# read fixed part |
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cur = data[off:off + _fmfsize] |
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off += _fmfsize |
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151 |
nbsuc, mdsize, flags, pre = _unpack(_fmfixed, cur) |
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# read replacement |
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sucs = () |
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if nbsuc: |
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s = (_fnodesize * nbsuc) |
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cur = data[off:off + s] |
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sucs = _unpack(_fmnode * nbsuc, cur) |
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off += s |
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159 |
# read metadata |
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# (metadata will be decoded on demand) |
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metadata = data[off:off + mdsize] |
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if len(metadata) != mdsize: |
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raise util.Abort(_('parsing obsolete marker: metadata is too ' |
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'short, %d bytes expected, got %d') |
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% (mdsize, len(metadata))) |
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off += mdsize |
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yield (pre, sucs, flags, metadata) |
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168 |
|
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169 |
def encodemeta(meta): |
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"""Return encoded metadata string to string mapping. |
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171 |
|
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172 |
Assume no ':' in key and no '\0' in both key and value.""" |
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173 |
for key, value in meta.iteritems(): |
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174 |
if ':' in key or '\0' in key: |
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175 |
raise ValueError("':' and '\0' are forbidden in metadata key'") |
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176 |
if '\0' in value: |
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177 |
raise ValueError("':' are forbidden in metadata value'") |
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178 |
return '\0'.join(['%s:%s' % (k, meta[k]) for k in sorted(meta)]) |
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179 |
|
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180 |
def decodemeta(data): |
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181 |
"""Return string to string dictionary from encoded version.""" |
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182 |
d = {} |
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183 |
for l in data.split('\0'): |
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184 |
if l: |
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185 |
key, value = l.split(':') |
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186 |
d[key] = value |
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187 |
return d |
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188 |
|
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189 |
class marker(object): |
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190 |
"""Wrap obsolete marker raw data""" |
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191 |
|
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192 |
def __init__(self, repo, data): |
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193 |
# the repo argument will be used to create changectx in later version |
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194 |
self._repo = repo |
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195 |
self._data = data |
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196 |
self._decodedmeta = None |
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197 |
|
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198 |
def precnode(self): |
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199 |
"""Precursor changeset node identifier""" |
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200 |
return self._data[0] |
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201 |
|
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202 |
def succnodes(self): |
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203 |
"""List of successor changesets node identifiers""" |
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204 |
return self._data[1] |
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205 |
|
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206 |
def metadata(self): |
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207 |
"""Decoded metadata dictionary""" |
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208 |
if self._decodedmeta is None: |
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209 |
self._decodedmeta = decodemeta(self._data[3]) |
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210 |
return self._decodedmeta |
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211 |
|
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212 |
def date(self): |
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213 |
"""Creation date as (unixtime, offset)""" |
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214 |
parts = self.metadata()['date'].split(' ') |
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215 |
return (float(parts[0]), int(parts[1])) |
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216 |
|
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217 |
class obsstore(object): |
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218 |
"""Store obsolete markers |
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219 |
|
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220 |
Markers can be accessed with two mappings: |
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221 |
- precursors[x] -> set(markers on precursors edges of x) |
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222 |
- successors[x] -> set(markers on successors edges of x) |
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223 |
""" |
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224 |
|
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225 |
def __init__(self, sopener): |
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226 |
# caches for various obsolescence related cache |
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227 |
self.caches = {} |
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228 |
self._all = [] |
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229 |
# new markers to serialize |
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230 |
self.precursors = {} |
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231 |
self.successors = {} |
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232 |
self.sopener = sopener |
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data = sopener.tryread('obsstore') |
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if data: |
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self._load(_readmarkers(data)) |
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236 |
|
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237 |
def __iter__(self): |
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return iter(self._all) |
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239 |
|
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240 |
def __nonzero__(self): |
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241 |
return bool(self._all) |
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242 |
|
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243 |
def create(self, transaction, prec, succs=(), flag=0, metadata=None): |
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"""obsolete: add a new obsolete marker |
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245 |
|
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246 |
* ensuring it is hashable |
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247 |
* check mandatory metadata |
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248 |
* encode metadata |
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249 |
""" |
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250 |
if metadata is None: |
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251 |
metadata = {} |
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252 |
if len(prec) != 20: |
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253 |
raise ValueError(prec) |
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254 |
for succ in succs: |
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255 |
if len(succ) != 20: |
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256 |
raise ValueError(succ) |
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257 |
marker = (str(prec), tuple(succs), int(flag), encodemeta(metadata)) |
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258 |
self.add(transaction, [marker]) |
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259 |
|
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260 |
def add(self, transaction, markers): |
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261 |
"""Add new markers to the store |
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262 |
|
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263 |
Take care of filtering duplicate. |
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264 |
Return the number of new marker.""" |
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265 |
if not _enabled: |
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266 |
raise util.Abort('obsolete feature is not enabled on this repo') |
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267 |
new = [m for m in markers if m not in self._all] |
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268 |
if new: |
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269 |
f = self.sopener('obsstore', 'ab') |
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270 |
try: |
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271 |
# Whether the file's current position is at the begin or at |
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272 |
# the end after opening a file for appending is implementation |
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273 |
# defined. So we must seek to the end before calling tell(), |
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274 |
# or we may get a zero offset for non-zero sized files on |
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|
275 |
# some platforms (issue3543). |
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|
276 |
f.seek(0, _SEEK_END) |
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277 |
offset = f.tell() |
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278 |
transaction.add('obsstore', offset) |
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279 |
# offset == 0: new file - add the version header |
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280 |
for bytes in _encodemarkers(new, offset == 0): |
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281 |
f.write(bytes) |
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|
282 |
finally: |
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283 |
# XXX: f.close() == filecache invalidation == obsstore rebuilt. |
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|
284 |
# call 'filecacheentry.refresh()' here |
17124
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285 |
f.close() |
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|
286 |
self._load(new) |
17469
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|
287 |
# new marker *may* have changed several set. invalidate the cache. |
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|
288 |
self.caches.clear() |
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|
289 |
return len(new) |
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|
290 |
|
17524 | 291 |
def mergemarkers(self, transaction, data): |
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292 |
markers = _readmarkers(data) |
17524 | 293 |
self.add(transaction, markers) |
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294 |
|
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|
295 |
def _load(self, markers): |
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296 |
for mark in markers: |
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|
297 |
self._all.append(mark) |
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|
298 |
pre, sucs = mark[:2] |
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|
299 |
self.successors.setdefault(pre, set()).add(mark) |
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|
300 |
for suc in sucs: |
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|
301 |
self.precursors.setdefault(suc, set()).add(mark) |
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|
302 |
if node.nullid in self.precursors: |
17774
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|
303 |
raise util.Abort(_('bad obsolescence marker detected: ' |
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|
304 |
'invalid successors nullid')) |
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|
305 |
|
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|
306 |
def _encodemarkers(markers, addheader=False): |
17125
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|
307 |
# Kept separate from flushmarkers(), it will be reused for |
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|
308 |
# markers exchange. |
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|
309 |
if addheader: |
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|
310 |
yield _pack('>B', _fmversion) |
17125
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|
311 |
for marker in markers: |
17295
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|
312 |
yield _encodeonemarker(marker) |
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|
313 |
|
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|
314 |
|
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|
315 |
def _encodeonemarker(marker): |
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|
316 |
pre, sucs, flags, metadata = marker |
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|
317 |
nbsuc = len(sucs) |
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|
318 |
format = _fmfixed + (_fmnode * nbsuc) |
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|
319 |
data = [nbsuc, len(metadata), flags, pre] |
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|
320 |
data.extend(sucs) |
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|
321 |
return _pack(format, *data) + metadata |
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|
322 |
|
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|
323 |
# arbitrary picked to fit into 8K limit from HTTP server |
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|
324 |
# you have to take in account: |
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|
325 |
# - the version header |
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|
326 |
# - the base85 encoding |
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|
327 |
_maxpayload = 5300 |
17075
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|
328 |
|
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|
329 |
def listmarkers(repo): |
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|
330 |
"""List markers over pushkey""" |
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|
331 |
if not repo.obsstore: |
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|
332 |
return {} |
17295
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|
333 |
keys = {} |
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|
334 |
parts = [] |
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|
335 |
currentlen = _maxpayload * 2 # ensure we create a new part |
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|
336 |
for marker in repo.obsstore: |
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|
337 |
nextdata = _encodeonemarker(marker) |
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|
338 |
if (len(nextdata) + currentlen > _maxpayload): |
1f08ecc7febb
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|
339 |
currentpart = [] |
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|
340 |
currentlen = 0 |
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|
341 |
parts.append(currentpart) |
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|
342 |
currentpart.append(nextdata) |
17304
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diff
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|
343 |
currentlen += len(nextdata) |
17295
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|
344 |
for idx, part in enumerate(reversed(parts)): |
1f08ecc7febb
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|
345 |
data = ''.join([_pack('>B', _fmversion)] + part) |
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|
346 |
keys['dump%i' % idx] = base85.b85encode(data) |
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|
347 |
return keys |
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diff
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|
348 |
|
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|
349 |
def pushmarker(repo, key, old, new): |
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diff
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|
350 |
"""Push markers over pushkey""" |
17295
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diff
changeset
|
351 |
if not key.startswith('dump'): |
17075
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|
352 |
repo.ui.warn(_('unknown key: %r') % key) |
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changeset
|
353 |
return 0 |
28ed1c4511ce
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changeset
|
354 |
if old: |
28ed1c4511ce
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diff
changeset
|
355 |
repo.ui.warn(_('unexpected old value') % key) |
28ed1c4511ce
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diff
changeset
|
356 |
return 0 |
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parents:
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diff
changeset
|
357 |
data = base85.b85decode(new) |
28ed1c4511ce
obsolete: exchange obsolete marker over pushkey
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diff
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|
358 |
lock = repo.lock() |
28ed1c4511ce
obsolete: exchange obsolete marker over pushkey
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17073
diff
changeset
|
359 |
try: |
17126
8fa8717b47b6
obsolete: write obsolete marker inside a transaction
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents:
17125
diff
changeset
|
360 |
tr = repo.transaction('pushkey: obsolete markers') |
8fa8717b47b6
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diff
changeset
|
361 |
try: |
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obsolete: write obsolete marker inside a transaction
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parents:
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diff
changeset
|
362 |
repo.obsstore.mergemarkers(tr, data) |
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diff
changeset
|
363 |
tr.close() |
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parents:
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diff
changeset
|
364 |
return 1 |
8fa8717b47b6
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parents:
17125
diff
changeset
|
365 |
finally: |
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diff
changeset
|
366 |
tr.release() |
17075
28ed1c4511ce
obsolete: exchange obsolete marker over pushkey
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diff
changeset
|
367 |
finally: |
28ed1c4511ce
obsolete: exchange obsolete marker over pushkey
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parents:
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diff
changeset
|
368 |
lock.release() |
17073
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obsolete: add easy way to iterate over obsolete marker object
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diff
changeset
|
369 |
|
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diff
changeset
|
370 |
def allmarkers(repo): |
3a79a5682af1
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|
371 |
"""all obsolete markers known in a repository""" |
3a79a5682af1
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changeset
|
372 |
for markerdata in repo.obsstore: |
3a79a5682af1
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diff
changeset
|
373 |
yield marker(repo, markerdata) |
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17072
diff
changeset
|
374 |
|
17076
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obsolete: function and method to access some obsolete data
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changeset
|
375 |
def precursormarkers(ctx): |
17776
072812e9f570
obsolete: flip `obstore.successors` and `obsolete.precursors`
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diff
changeset
|
376 |
"""obsolete marker marking this changeset as a successors""" |
17076
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diff
changeset
|
377 |
for data in ctx._repo.obsstore.precursors.get(ctx.node(), ()): |
75f4180509a4
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diff
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|
378 |
yield marker(ctx._repo, data) |
75f4180509a4
obsolete: function and method to access some obsolete data
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diff
changeset
|
379 |
|
75f4180509a4
obsolete: function and method to access some obsolete data
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parents:
17075
diff
changeset
|
380 |
def successormarkers(ctx): |
17776
072812e9f570
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17775
diff
changeset
|
381 |
"""obsolete marker making this changeset obsolete""" |
17076
75f4180509a4
obsolete: function and method to access some obsolete data
Pierre-Yves.David@ens-lyon.org
parents:
17075
diff
changeset
|
382 |
for data in ctx._repo.obsstore.successors.get(ctx.node(), ()): |
75f4180509a4
obsolete: function and method to access some obsolete data
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parents:
17075
diff
changeset
|
383 |
yield marker(ctx._repo, data) |
75f4180509a4
obsolete: function and method to access some obsolete data
Pierre-Yves.David@ens-lyon.org
parents:
17075
diff
changeset
|
384 |
|
17831
70b08df24fef
obsolete: add a flag that allows fixing "bumped" changeset
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17828
diff
changeset
|
385 |
def allsuccessors(obsstore, nodes, ignoreflags=0): |
17827
612db9d7e76a
obsolete: have `allsuccessors` takes a list of nodes
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17826
diff
changeset
|
386 |
"""Yield node for every successor of <nodes>. |
612db9d7e76a
obsolete: have `allsuccessors` takes a list of nodes
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17826
diff
changeset
|
387 |
|
612db9d7e76a
obsolete: have `allsuccessors` takes a list of nodes
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17826
diff
changeset
|
388 |
Some successors may be unknown locally. |
17213
7eb5aa1f83fd
obsolete: add an any successors function
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17200
diff
changeset
|
389 |
|
17537 | 390 |
This is a linear yield unsuited to detecting split changesets.""" |
17827
612db9d7e76a
obsolete: have `allsuccessors` takes a list of nodes
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17826
diff
changeset
|
391 |
remaining = set(nodes) |
17213
7eb5aa1f83fd
obsolete: add an any successors function
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17200
diff
changeset
|
392 |
seen = set(remaining) |
7eb5aa1f83fd
obsolete: add an any successors function
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17200
diff
changeset
|
393 |
while remaining: |
7eb5aa1f83fd
obsolete: add an any successors function
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parents:
17200
diff
changeset
|
394 |
current = remaining.pop() |
7eb5aa1f83fd
obsolete: add an any successors function
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parents:
17200
diff
changeset
|
395 |
yield current |
17776
072812e9f570
obsolete: flip `obstore.successors` and `obsolete.precursors`
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17775
diff
changeset
|
396 |
for mark in obsstore.successors.get(current, ()): |
17831
70b08df24fef
obsolete: add a flag that allows fixing "bumped" changeset
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17828
diff
changeset
|
397 |
# ignore marker flagged with with specified flag |
70b08df24fef
obsolete: add a flag that allows fixing "bumped" changeset
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17828
diff
changeset
|
398 |
if mark[2] & ignoreflags: |
70b08df24fef
obsolete: add a flag that allows fixing "bumped" changeset
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17828
diff
changeset
|
399 |
continue |
17213
7eb5aa1f83fd
obsolete: add an any successors function
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17200
diff
changeset
|
400 |
for suc in mark[1]: |
7eb5aa1f83fd
obsolete: add an any successors function
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17200
diff
changeset
|
401 |
if suc not in seen: |
7eb5aa1f83fd
obsolete: add an any successors function
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17200
diff
changeset
|
402 |
seen.add(suc) |
7eb5aa1f83fd
obsolete: add an any successors function
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17200
diff
changeset
|
403 |
remaining.add(suc) |
17469
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
404 |
|
17828
9495be4126ef
obsolete: add the detection of bumped changeset.
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17827
diff
changeset
|
405 |
def _knownrevs(repo, nodes): |
9495be4126ef
obsolete: add the detection of bumped changeset.
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17827
diff
changeset
|
406 |
"""yield revision numbers of known nodes passed in parameters |
9495be4126ef
obsolete: add the detection of bumped changeset.
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17827
diff
changeset
|
407 |
|
9495be4126ef
obsolete: add the detection of bumped changeset.
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17827
diff
changeset
|
408 |
Unknown revisions are silently ignored.""" |
9495be4126ef
obsolete: add the detection of bumped changeset.
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17827
diff
changeset
|
409 |
torev = repo.changelog.nodemap.get |
9495be4126ef
obsolete: add the detection of bumped changeset.
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17827
diff
changeset
|
410 |
for n in nodes: |
9495be4126ef
obsolete: add the detection of bumped changeset.
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17827
diff
changeset
|
411 |
rev = torev(n) |
9495be4126ef
obsolete: add the detection of bumped changeset.
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17827
diff
changeset
|
412 |
if rev is not None: |
9495be4126ef
obsolete: add the detection of bumped changeset.
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17827
diff
changeset
|
413 |
yield rev |
9495be4126ef
obsolete: add the detection of bumped changeset.
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17827
diff
changeset
|
414 |
|
9495be4126ef
obsolete: add the detection of bumped changeset.
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17827
diff
changeset
|
415 |
# mapping of 'set-name' -> <function to compute this set> |
17469
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
416 |
cachefuncs = {} |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
417 |
def cachefor(name): |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
418 |
"""Decorator to register a function as computing the cache for a set""" |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
419 |
def decorator(func): |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
420 |
assert name not in cachefuncs |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
421 |
cachefuncs[name] = func |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
422 |
return func |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
423 |
return decorator |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
424 |
|
17825
3cc06457f15e
obsolete: rename `getobscache` into `getrevs`
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents:
17776
diff
changeset
|
425 |
def getrevs(repo, name): |
17469
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
426 |
"""Return the set of revision that belong to the <name> set |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
427 |
|
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
428 |
Such access may compute the set and cache it for future use""" |
18001
e02feadd15ea
clfilter: unfilter computation of obsolescence related computation
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents:
17831
diff
changeset
|
429 |
repo = repo.unfiltered() |
17469
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
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parents:
17429
diff
changeset
|
430 |
if not repo.obsstore: |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
431 |
return () |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
432 |
if name not in repo.obsstore.caches: |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
433 |
repo.obsstore.caches[name] = cachefuncs[name](repo) |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
434 |
return repo.obsstore.caches[name] |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
435 |
|
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
436 |
# To be simple we need to invalidate obsolescence cache when: |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
437 |
# |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
438 |
# - new changeset is added: |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
439 |
# - public phase is changed |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
440 |
# - obsolescence marker are added |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
441 |
# - strip is used a repo |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
442 |
def clearobscaches(repo): |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
443 |
"""Remove all obsolescence related cache from a repo |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
444 |
|
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
445 |
This remove all cache in obsstore is the obsstore already exist on the |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
446 |
repo. |
fb72eec7efd8
obsolete: introduce caches for all meaningful sets
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
17429
diff
changeset
|
447 |
|
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448 |
(We could be smarter here given the exact event that trigger the cache |
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|
449 |
clearing)""" |
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450 |
# only clear cache is there is obsstore data in this repo |
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|
451 |
if 'obsstore' in repo._filecache: |
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|
452 |
repo.obsstore.caches.clear() |
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|
453 |
|
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|
454 |
@cachefor('obsolete') |
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|
455 |
def _computeobsoleteset(repo): |
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456 |
"""the set of obsolete revisions""" |
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457 |
obs = set() |
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458 |
nm = repo.changelog.nodemap |
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|
459 |
for node in repo.obsstore.successors: |
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460 |
rev = nm.get(node) |
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461 |
if rev is not None: |
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462 |
obs.add(rev) |
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463 |
return set(repo.revs('%ld - public()', obs)) |
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|
464 |
|
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|
465 |
@cachefor('unstable') |
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|
466 |
def _computeunstableset(repo): |
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467 |
"""the set of non obsolete revisions with obsolete parents""" |
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468 |
return set(repo.revs('(obsolete()::) - obsolete()')) |
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|
469 |
|
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|
470 |
@cachefor('suspended') |
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|
471 |
def _computesuspendedset(repo): |
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472 |
"""the set of obsolete parents with non obsolete descendants""" |
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473 |
return set(repo.revs('obsolete() and obsolete()::unstable()')) |
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|
474 |
|
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475 |
@cachefor('extinct') |
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|
476 |
def _computeextinctset(repo): |
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|
477 |
"""the set of obsolete parents without non obsolete descendants""" |
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|
478 |
return set(repo.revs('obsolete() - obsolete()::unstable()')) |
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|
479 |
|
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|
480 |
|
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481 |
@cachefor('bumped') |
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482 |
def _computebumpedset(repo): |
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483 |
"""the set of revs trying to obsolete public revisions""" |
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484 |
# get all possible bumped changesets |
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|
485 |
tonode = repo.changelog.node |
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|
486 |
publicnodes = (tonode(r) for r in repo.revs('public()')) |
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|
487 |
successors = allsuccessors(repo.obsstore, publicnodes, |
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|
488 |
ignoreflags=bumpedfix) |
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|
489 |
# revision public or already obsolete don't count as bumped |
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|
490 |
query = '%ld - obsolete() - public()' |
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|
491 |
return set(repo.revs(query, _knownrevs(repo, successors))) |
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|
492 |
|
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|
493 |
def createmarkers(repo, relations, flag=0, metadata=None): |
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|
494 |
"""Add obsolete markers between changesets in a repo |
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changeset
|
495 |
|
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|
496 |
<relations> must be an iterable of (<old>, (<new>, ...)) tuple. |
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|
497 |
`old` and `news` are changectx. |
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changeset
|
498 |
|
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|
499 |
Trying to obsolete a public changeset will raise an exception. |
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|
500 |
|
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|
501 |
Current user and date are used except if specified otherwise in the |
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|
502 |
metadata attribute. |
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changeset
|
503 |
|
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|
504 |
This function operates within a transaction of its own, but does |
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|
505 |
not take any lock on the repo. |
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|
506 |
""" |
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|
507 |
# prepare metadata |
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|
508 |
if metadata is None: |
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|
509 |
metadata = {} |
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|
510 |
if 'date' not in metadata: |
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|
511 |
metadata['date'] = '%i %i' % util.makedate() |
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|
512 |
if 'user' not in metadata: |
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|
513 |
metadata['user'] = repo.ui.username() |
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|
514 |
tr = repo.transaction('add-obsolescence-marker') |
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|
515 |
try: |
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|
516 |
for prec, sucs in relations: |
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|
517 |
if not prec.mutable(): |
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|
518 |
raise util.Abort("cannot obsolete immutable changeset: %s" |
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changeset
|
519 |
% prec) |
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|
520 |
nprec = prec.node() |
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|
521 |
nsucs = tuple(s.node() for s in sucs) |
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changeset
|
522 |
if nprec in nsucs: |
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changeset
|
523 |
raise util.Abort("changeset %s cannot obsolete itself" % prec) |
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changeset
|
524 |
repo.obsstore.create(tr, nprec, nsucs, flag, metadata) |
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|
525 |
tr.close() |
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changeset
|
526 |
finally: |
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changeset
|
527 |
tr.release() |