filemerge: eliminate most uses of tempfiles
Emphasize that they're unused so we can more easily remove them later.
Differential Revision: https://phab.mercurial-scm.org/D399
# bundlerepo.py - repository class for viewing uncompressed bundles
#
# Copyright 2006, 2007 Benoit Boissinot <bboissin@gmail.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
"""Repository class for viewing uncompressed bundles.
This provides a read-only repository interface to bundles as if they
were part of the actual repository.
"""
from __future__ import absolute_import
import os
import shutil
import tempfile
from .i18n import _
from .node import nullid
from . import (
bundle2,
changegroup,
changelog,
cmdutil,
discovery,
error,
exchange,
filelog,
localrepo,
manifest,
mdiff,
node as nodemod,
pathutil,
phases,
pycompat,
revlog,
util,
vfs as vfsmod,
)
class bundlerevlog(revlog.revlog):
def __init__(self, opener, indexfile, bundle, linkmapper):
# How it works:
# To retrieve a revision, we need to know the offset of the revision in
# the bundle (an unbundle object). We store this offset in the index
# (start). The base of the delta is stored in the base field.
#
# To differentiate a rev in the bundle from a rev in the revlog, we
# check revision against repotiprev.
opener = vfsmod.readonlyvfs(opener)
revlog.revlog.__init__(self, opener, indexfile)
self.bundle = bundle
n = len(self)
self.repotiprev = n - 1
chain = None
self.bundlerevs = set() # used by 'bundle()' revset expression
getchunk = lambda: bundle.deltachunk(chain)
for chunkdata in iter(getchunk, {}):
node = chunkdata['node']
p1 = chunkdata['p1']
p2 = chunkdata['p2']
cs = chunkdata['cs']
deltabase = chunkdata['deltabase']
delta = chunkdata['delta']
flags = chunkdata['flags']
size = len(delta)
start = bundle.tell() - size
link = linkmapper(cs)
if node in self.nodemap:
# this can happen if two branches make the same change
chain = node
self.bundlerevs.add(self.nodemap[node])
continue
for p in (p1, p2):
if p not in self.nodemap:
raise error.LookupError(p, self.indexfile,
_("unknown parent"))
if deltabase not in self.nodemap:
raise LookupError(deltabase, self.indexfile,
_('unknown delta base'))
baserev = self.rev(deltabase)
# start, size, full unc. size, base (unused), link, p1, p2, node
e = (revlog.offset_type(start, flags), size, -1, baserev, link,
self.rev(p1), self.rev(p2), node)
self.index.insert(-1, e)
self.nodemap[node] = n
self.bundlerevs.add(n)
chain = node
n += 1
def _chunk(self, rev):
# Warning: in case of bundle, the diff is against what we stored as
# delta base, not against rev - 1
# XXX: could use some caching
if rev <= self.repotiprev:
return revlog.revlog._chunk(self, rev)
self.bundle.seek(self.start(rev))
return self.bundle.read(self.length(rev))
def revdiff(self, rev1, rev2):
"""return or calculate a delta between two revisions"""
if rev1 > self.repotiprev and rev2 > self.repotiprev:
# hot path for bundle
revb = self.index[rev2][3]
if revb == rev1:
return self._chunk(rev2)
elif rev1 <= self.repotiprev and rev2 <= self.repotiprev:
return revlog.revlog.revdiff(self, rev1, rev2)
return mdiff.textdiff(self.revision(rev1, raw=True),
self.revision(rev2, raw=True))
def revision(self, nodeorrev, raw=False):
"""return an uncompressed revision of a given node or revision
number.
"""
if isinstance(nodeorrev, int):
rev = nodeorrev
node = self.node(rev)
else:
node = nodeorrev
rev = self.rev(node)
if node == nullid:
return ""
rawtext = None
chain = []
iterrev = rev
# reconstruct the revision if it is from a changegroup
while iterrev > self.repotiprev:
if self._cache and self._cache[1] == iterrev:
rawtext = self._cache[2]
break
chain.append(iterrev)
iterrev = self.index[iterrev][3]
if rawtext is None:
rawtext = self.baserevision(iterrev)
while chain:
delta = self._chunk(chain.pop())
rawtext = mdiff.patches(rawtext, [delta])
text, validatehash = self._processflags(rawtext, self.flags(rev),
'read', raw=raw)
if validatehash:
self.checkhash(text, node, rev=rev)
self._cache = (node, rev, rawtext)
return text
def baserevision(self, nodeorrev):
# Revlog subclasses may override 'revision' method to modify format of
# content retrieved from revlog. To use bundlerevlog with such class one
# needs to override 'baserevision' and make more specific call here.
return revlog.revlog.revision(self, nodeorrev, raw=True)
def addrevision(self, text, transaction, link, p1=None, p2=None, d=None):
raise NotImplementedError
def addgroup(self, revs, linkmapper, transaction):
raise NotImplementedError
def strip(self, rev, minlink):
raise NotImplementedError
def checksize(self):
raise NotImplementedError
class bundlechangelog(bundlerevlog, changelog.changelog):
def __init__(self, opener, bundle):
changelog.changelog.__init__(self, opener)
linkmapper = lambda x: x
bundlerevlog.__init__(self, opener, self.indexfile, bundle,
linkmapper)
def baserevision(self, nodeorrev):
# Although changelog doesn't override 'revision' method, some extensions
# may replace this class with another that does. Same story with
# manifest and filelog classes.
# This bypasses filtering on changelog.node() and rev() because we need
# revision text of the bundle base even if it is hidden.
oldfilter = self.filteredrevs
try:
self.filteredrevs = ()
return changelog.changelog.revision(self, nodeorrev, raw=True)
finally:
self.filteredrevs = oldfilter
class bundlemanifest(bundlerevlog, manifest.manifestrevlog):
def __init__(self, opener, bundle, linkmapper, dirlogstarts=None, dir=''):
manifest.manifestrevlog.__init__(self, opener, dir=dir)
bundlerevlog.__init__(self, opener, self.indexfile, bundle,
linkmapper)
if dirlogstarts is None:
dirlogstarts = {}
if self.bundle.version == "03":
dirlogstarts = _getfilestarts(self.bundle)
self._dirlogstarts = dirlogstarts
self._linkmapper = linkmapper
def baserevision(self, nodeorrev):
node = nodeorrev
if isinstance(node, int):
node = self.node(node)
if node in self.fulltextcache:
result = '%s' % self.fulltextcache[node]
else:
result = manifest.manifestrevlog.revision(self, nodeorrev, raw=True)
return result
def dirlog(self, d):
if d in self._dirlogstarts:
self.bundle.seek(self._dirlogstarts[d])
return bundlemanifest(
self.opener, self.bundle, self._linkmapper,
self._dirlogstarts, dir=d)
return super(bundlemanifest, self).dirlog(d)
class bundlefilelog(bundlerevlog, filelog.filelog):
def __init__(self, opener, path, bundle, linkmapper):
filelog.filelog.__init__(self, opener, path)
bundlerevlog.__init__(self, opener, self.indexfile, bundle,
linkmapper)
def baserevision(self, nodeorrev):
return filelog.filelog.revision(self, nodeorrev, raw=True)
class bundlepeer(localrepo.localpeer):
def canpush(self):
return False
class bundlephasecache(phases.phasecache):
def __init__(self, *args, **kwargs):
super(bundlephasecache, self).__init__(*args, **kwargs)
if util.safehasattr(self, 'opener'):
self.opener = vfsmod.readonlyvfs(self.opener)
def write(self):
raise NotImplementedError
def _write(self, fp):
raise NotImplementedError
def _updateroots(self, phase, newroots, tr):
self.phaseroots[phase] = newroots
self.invalidate()
self.dirty = True
def _getfilestarts(bundle):
bundlefilespos = {}
for chunkdata in iter(bundle.filelogheader, {}):
fname = chunkdata['filename']
bundlefilespos[fname] = bundle.tell()
for chunk in iter(lambda: bundle.deltachunk(None), {}):
pass
return bundlefilespos
class bundlerepository(localrepo.localrepository):
def __init__(self, ui, path, bundlename):
self._tempparent = None
try:
localrepo.localrepository.__init__(self, ui, path)
except error.RepoError:
self._tempparent = tempfile.mkdtemp()
localrepo.instance(ui, self._tempparent, 1)
localrepo.localrepository.__init__(self, ui, self._tempparent)
self.ui.setconfig('phases', 'publish', False, 'bundlerepo')
if path:
self._url = 'bundle:' + util.expandpath(path) + '+' + bundlename
else:
self._url = 'bundle:' + bundlename
self.tempfile = None
f = util.posixfile(bundlename, "rb")
self.bundlefile = self.bundle = exchange.readbundle(ui, f, bundlename)
if isinstance(self.bundle, bundle2.unbundle20):
hadchangegroup = False
for part in self.bundle.iterparts():
if part.type == 'changegroup':
if hadchangegroup:
raise NotImplementedError("can't process "
"multiple changegroups")
hadchangegroup = True
self._handlebundle2part(part)
if not hadchangegroup:
raise error.Abort(_("No changegroups found"))
elif self.bundle.compressed():
f = self._writetempbundle(self.bundle.read, '.hg10un',
header='HG10UN')
self.bundlefile = self.bundle = exchange.readbundle(ui, f,
bundlename,
self.vfs)
# dict with the mapping 'filename' -> position in the bundle
self.bundlefilespos = {}
self.firstnewrev = self.changelog.repotiprev + 1
phases.retractboundary(self, None, phases.draft,
[ctx.node() for ctx in self[self.firstnewrev:]])
def _handlebundle2part(self, part):
if part.type == 'changegroup':
cgstream = part
version = part.params.get('version', '01')
legalcgvers = changegroup.supportedincomingversions(self)
if version not in legalcgvers:
msg = _('Unsupported changegroup version: %s')
raise error.Abort(msg % version)
if self.bundle.compressed():
cgstream = self._writetempbundle(part.read,
".cg%sun" % version)
self.bundle = changegroup.getunbundler(version, cgstream, 'UN')
def _writetempbundle(self, readfn, suffix, header=''):
"""Write a temporary file to disk
"""
fdtemp, temp = self.vfs.mkstemp(prefix="hg-bundle-",
suffix=".hg10un")
self.tempfile = temp
with os.fdopen(fdtemp, pycompat.sysstr('wb')) as fptemp:
fptemp.write(header)
while True:
chunk = readfn(2**18)
if not chunk:
break
fptemp.write(chunk)
return self.vfs.open(self.tempfile, mode="rb")
@localrepo.unfilteredpropertycache
def _phasecache(self):
return bundlephasecache(self, self._phasedefaults)
@localrepo.unfilteredpropertycache
def changelog(self):
# consume the header if it exists
self.bundle.changelogheader()
c = bundlechangelog(self.svfs, self.bundle)
self.manstart = self.bundle.tell()
return c
def _constructmanifest(self):
self.bundle.seek(self.manstart)
# consume the header if it exists
self.bundle.manifestheader()
linkmapper = self.unfiltered().changelog.rev
m = bundlemanifest(self.svfs, self.bundle, linkmapper)
self.filestart = self.bundle.tell()
return m
@localrepo.unfilteredpropertycache
def manstart(self):
self.changelog
return self.manstart
@localrepo.unfilteredpropertycache
def filestart(self):
self.manifestlog
return self.filestart
def url(self):
return self._url
def file(self, f):
if not self.bundlefilespos:
self.bundle.seek(self.filestart)
self.bundlefilespos = _getfilestarts(self.bundle)
if f in self.bundlefilespos:
self.bundle.seek(self.bundlefilespos[f])
linkmapper = self.unfiltered().changelog.rev
return bundlefilelog(self.svfs, f, self.bundle, linkmapper)
else:
return filelog.filelog(self.svfs, f)
def close(self):
"""Close assigned bundle file immediately."""
self.bundlefile.close()
if self.tempfile is not None:
self.vfs.unlink(self.tempfile)
if self._tempparent:
shutil.rmtree(self._tempparent, True)
def cancopy(self):
return False
def peer(self):
return bundlepeer(self)
def getcwd(self):
return pycompat.getcwd() # always outside the repo
# Check if parents exist in localrepo before setting
def setparents(self, p1, p2=nullid):
p1rev = self.changelog.rev(p1)
p2rev = self.changelog.rev(p2)
msg = _("setting parent to node %s that only exists in the bundle\n")
if self.changelog.repotiprev < p1rev:
self.ui.warn(msg % nodemod.hex(p1))
if self.changelog.repotiprev < p2rev:
self.ui.warn(msg % nodemod.hex(p2))
return super(bundlerepository, self).setparents(p1, p2)
def instance(ui, path, create):
if create:
raise error.Abort(_('cannot create new bundle repository'))
# internal config: bundle.mainreporoot
parentpath = ui.config("bundle", "mainreporoot")
if not parentpath:
# try to find the correct path to the working directory repo
parentpath = cmdutil.findrepo(pycompat.getcwd())
if parentpath is None:
parentpath = ''
if parentpath:
# Try to make the full path relative so we get a nice, short URL.
# In particular, we don't want temp dir names in test outputs.
cwd = pycompat.getcwd()
if parentpath == cwd:
parentpath = ''
else:
cwd = pathutil.normasprefix(cwd)
if parentpath.startswith(cwd):
parentpath = parentpath[len(cwd):]
u = util.url(path)
path = u.localpath()
if u.scheme == 'bundle':
s = path.split("+", 1)
if len(s) == 1:
repopath, bundlename = parentpath, s[0]
else:
repopath, bundlename = s
else:
repopath, bundlename = parentpath, path
return bundlerepository(ui, repopath, bundlename)
class bundletransactionmanager(object):
def transaction(self):
return None
def close(self):
raise NotImplementedError
def release(self):
raise NotImplementedError
def getremotechanges(ui, repo, other, onlyheads=None, bundlename=None,
force=False):
'''obtains a bundle of changes incoming from other
"onlyheads" restricts the returned changes to those reachable from the
specified heads.
"bundlename", if given, stores the bundle to this file path permanently;
otherwise it's stored to a temp file and gets deleted again when you call
the returned "cleanupfn".
"force" indicates whether to proceed on unrelated repos.
Returns a tuple (local, csets, cleanupfn):
"local" is a local repo from which to obtain the actual incoming
changesets; it is a bundlerepo for the obtained bundle when the
original "other" is remote.
"csets" lists the incoming changeset node ids.
"cleanupfn" must be called without arguments when you're done processing
the changes; it closes both the original "other" and the one returned
here.
'''
tmp = discovery.findcommonincoming(repo, other, heads=onlyheads,
force=force)
common, incoming, rheads = tmp
if not incoming:
try:
if bundlename:
os.unlink(bundlename)
except OSError:
pass
return repo, [], other.close
commonset = set(common)
rheads = [x for x in rheads if x not in commonset]
bundle = None
bundlerepo = None
localrepo = other.local()
if bundlename or not localrepo:
# create a bundle (uncompressed if other repo is not local)
# developer config: devel.legacy.exchange
legexc = ui.configlist('devel', 'legacy.exchange')
forcebundle1 = 'bundle2' not in legexc and 'bundle1' in legexc
canbundle2 = (not forcebundle1
and other.capable('getbundle')
and other.capable('bundle2'))
if canbundle2:
kwargs = {}
kwargs['common'] = common
kwargs['heads'] = rheads
kwargs['bundlecaps'] = exchange.caps20to10(repo)
kwargs['cg'] = True
b2 = other.getbundle('incoming', **kwargs)
fname = bundle = changegroup.writechunks(ui, b2._forwardchunks(),
bundlename)
else:
if other.capable('getbundle'):
cg = other.getbundle('incoming', common=common, heads=rheads)
elif onlyheads is None and not other.capable('changegroupsubset'):
# compat with older servers when pulling all remote heads
cg = other.changegroup(incoming, "incoming")
rheads = None
else:
cg = other.changegroupsubset(incoming, rheads, 'incoming')
if localrepo:
bundletype = "HG10BZ"
else:
bundletype = "HG10UN"
fname = bundle = bundle2.writebundle(ui, cg, bundlename,
bundletype)
# keep written bundle?
if bundlename:
bundle = None
if not localrepo:
# use the created uncompressed bundlerepo
localrepo = bundlerepo = bundlerepository(repo.baseui, repo.root,
fname)
# this repo contains local and other now, so filter out local again
common = repo.heads()
if localrepo:
# Part of common may be remotely filtered
# So use an unfiltered version
# The discovery process probably need cleanup to avoid that
localrepo = localrepo.unfiltered()
csets = localrepo.changelog.findmissing(common, rheads)
if bundlerepo:
reponodes = [ctx.node() for ctx in bundlerepo[bundlerepo.firstnewrev:]]
remotephases = other.listkeys('phases')
pullop = exchange.pulloperation(bundlerepo, other, heads=reponodes)
pullop.trmanager = bundletransactionmanager()
exchange._pullapplyphases(pullop, remotephases)
def cleanup():
if bundlerepo:
bundlerepo.close()
if bundle:
os.unlink(bundle)
other.close()
return (localrepo, csets, cleanup)