generaldelta: initialize basecache properly
Previously basecache was incorrectly initialized before adding the first
revision from a changegroup. Basecache value influences when full revisions are
stored in revlog (when using generaldelta). As a result it was possible to
generate a generaldelta-revlog that could be bigger by arbitrary factor than its
non-generaldelta equivalent.
# convcmd - convert extension commands definition
#
# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from common import NoRepo, MissingTool, SKIPREV, mapfile
from cvs import convert_cvs
from darcs import darcs_source
from git import convert_git
from hg import mercurial_source, mercurial_sink
from subversion import svn_source, svn_sink
from monotone import monotone_source
from gnuarch import gnuarch_source
from bzr import bzr_source
from p4 import p4_source
import filemap
import os, shutil, shlex
from mercurial import hg, util, encoding
from mercurial.i18n import _
orig_encoding = 'ascii'
def recode(s):
if isinstance(s, unicode):
return s.encode(orig_encoding, 'replace')
else:
return s.decode('utf-8').encode(orig_encoding, 'replace')
source_converters = [
('cvs', convert_cvs, 'branchsort'),
('git', convert_git, 'branchsort'),
('svn', svn_source, 'branchsort'),
('hg', mercurial_source, 'sourcesort'),
('darcs', darcs_source, 'branchsort'),
('mtn', monotone_source, 'branchsort'),
('gnuarch', gnuarch_source, 'branchsort'),
('bzr', bzr_source, 'branchsort'),
('p4', p4_source, 'branchsort'),
]
sink_converters = [
('hg', mercurial_sink),
('svn', svn_sink),
]
def convertsource(ui, path, type, rev):
exceptions = []
if type and type not in [s[0] for s in source_converters]:
raise util.Abort(_('%s: invalid source repository type') % type)
for name, source, sortmode in source_converters:
try:
if not type or name == type:
return source(ui, path, rev), sortmode
except (NoRepo, MissingTool), inst:
exceptions.append(inst)
if not ui.quiet:
for inst in exceptions:
ui.write("%s\n" % inst)
raise util.Abort(_('%s: missing or unsupported repository') % path)
def convertsink(ui, path, type):
if type and type not in [s[0] for s in sink_converters]:
raise util.Abort(_('%s: invalid destination repository type') % type)
for name, sink in sink_converters:
try:
if not type or name == type:
return sink(ui, path)
except NoRepo, inst:
ui.note(_("convert: %s\n") % inst)
except MissingTool, inst:
raise util.Abort('%s\n' % inst)
raise util.Abort(_('%s: unknown repository type') % path)
class progresssource(object):
def __init__(self, ui, source, filecount):
self.ui = ui
self.source = source
self.filecount = filecount
self.retrieved = 0
def getfile(self, file, rev):
self.retrieved += 1
self.ui.progress(_('getting files'), self.retrieved,
item=file, total=self.filecount)
return self.source.getfile(file, rev)
def lookuprev(self, rev):
return self.source.lookuprev(rev)
def close(self):
self.ui.progress(_('getting files'), None)
class converter(object):
def __init__(self, ui, source, dest, revmapfile, opts):
self.source = source
self.dest = dest
self.ui = ui
self.opts = opts
self.commitcache = {}
self.authors = {}
self.authorfile = None
# Record converted revisions persistently: maps source revision
# ID to target revision ID (both strings). (This is how
# incremental conversions work.)
self.map = mapfile(ui, revmapfile)
# Read first the dst author map if any
authorfile = self.dest.authorfile()
if authorfile and os.path.exists(authorfile):
self.readauthormap(authorfile)
# Extend/Override with new author map if necessary
if opts.get('authormap'):
self.readauthormap(opts.get('authormap'))
self.authorfile = self.dest.authorfile()
self.splicemap = self.parsesplicemap(opts.get('splicemap'))
self.branchmap = mapfile(ui, opts.get('branchmap'))
def parsesplicemap(self, path):
""" check and validate the splicemap format and
return a child/parents dictionary.
Format checking has two parts.
1. generic format which is same across all source types
2. specific format checking which may be different for
different source type. This logic is implemented in
checkrevformat function in source files like
hg.py, subversion.py etc.
"""
if not path:
return {}
m = {}
try:
fp = open(path, 'r')
for i, line in enumerate(fp):
line = line.splitlines()[0].rstrip()
if not line:
# Ignore blank lines
continue
# split line
lex = shlex.shlex(line, posix=True)
lex.whitespace_split = True
lex.whitespace += ','
line = list(lex)
# check number of parents
if not (2 <= len(line) <= 3):
raise util.Abort(_('syntax error in %s(%d): child parent1'
'[,parent2] expected') % (path, i + 1))
for part in line:
self.source.checkrevformat(part)
child, p1, p2 = line[0], line[1:2], line[2:]
if p1 == p2:
m[child] = p1
else:
m[child] = p1 + p2
# if file does not exist or error reading, exit
except IOError:
raise util.Abort(_('splicemap file not found or error reading %s:')
% path)
return m
def walktree(self, heads):
'''Return a mapping that identifies the uncommitted parents of every
uncommitted changeset.'''
visit = heads
known = set()
parents = {}
while visit:
n = visit.pop(0)
if n in known or n in self.map:
continue
known.add(n)
self.ui.progress(_('scanning'), len(known), unit=_('revisions'))
commit = self.cachecommit(n)
parents[n] = []
for p in commit.parents:
parents[n].append(p)
visit.append(p)
self.ui.progress(_('scanning'), None)
return parents
def mergesplicemap(self, parents, splicemap):
"""A splicemap redefines child/parent relationships. Check the
map contains valid revision identifiers and merge the new
links in the source graph.
"""
for c in sorted(splicemap):
if c not in parents:
if not self.dest.hascommit(self.map.get(c, c)):
# Could be in source but not converted during this run
self.ui.warn(_('splice map revision %s is not being '
'converted, ignoring\n') % c)
continue
pc = []
for p in splicemap[c]:
# We do not have to wait for nodes already in dest.
if self.dest.hascommit(self.map.get(p, p)):
continue
# Parent is not in dest and not being converted, not good
if p not in parents:
raise util.Abort(_('unknown splice map parent: %s') % p)
pc.append(p)
parents[c] = pc
def toposort(self, parents, sortmode):
'''Return an ordering such that every uncommitted changeset is
preceded by all its uncommitted ancestors.'''
def mapchildren(parents):
"""Return a (children, roots) tuple where 'children' maps parent
revision identifiers to children ones, and 'roots' is the list of
revisions without parents. 'parents' must be a mapping of revision
identifier to its parents ones.
"""
visit = sorted(parents)
seen = set()
children = {}
roots = []
while visit:
n = visit.pop(0)
if n in seen:
continue
seen.add(n)
# Ensure that nodes without parents are present in the
# 'children' mapping.
children.setdefault(n, [])
hasparent = False
for p in parents[n]:
if p not in self.map:
visit.append(p)
hasparent = True
children.setdefault(p, []).append(n)
if not hasparent:
roots.append(n)
return children, roots
# Sort functions are supposed to take a list of revisions which
# can be converted immediately and pick one
def makebranchsorter():
"""If the previously converted revision has a child in the
eligible revisions list, pick it. Return the list head
otherwise. Branch sort attempts to minimize branch
switching, which is harmful for Mercurial backend
compression.
"""
prev = [None]
def picknext(nodes):
next = nodes[0]
for n in nodes:
if prev[0] in parents[n]:
next = n
break
prev[0] = next
return next
return picknext
def makesourcesorter():
"""Source specific sort."""
keyfn = lambda n: self.commitcache[n].sortkey
def picknext(nodes):
return sorted(nodes, key=keyfn)[0]
return picknext
def makeclosesorter():
"""Close order sort."""
keyfn = lambda n: ('close' not in self.commitcache[n].extra,
self.commitcache[n].sortkey)
def picknext(nodes):
return sorted(nodes, key=keyfn)[0]
return picknext
def makedatesorter():
"""Sort revisions by date."""
dates = {}
def getdate(n):
if n not in dates:
dates[n] = util.parsedate(self.commitcache[n].date)
return dates[n]
def picknext(nodes):
return min([(getdate(n), n) for n in nodes])[1]
return picknext
if sortmode == 'branchsort':
picknext = makebranchsorter()
elif sortmode == 'datesort':
picknext = makedatesorter()
elif sortmode == 'sourcesort':
picknext = makesourcesorter()
elif sortmode == 'closesort':
picknext = makeclosesorter()
else:
raise util.Abort(_('unknown sort mode: %s') % sortmode)
children, actives = mapchildren(parents)
s = []
pendings = {}
while actives:
n = picknext(actives)
actives.remove(n)
s.append(n)
# Update dependents list
for c in children.get(n, []):
if c not in pendings:
pendings[c] = [p for p in parents[c] if p not in self.map]
try:
pendings[c].remove(n)
except ValueError:
raise util.Abort(_('cycle detected between %s and %s')
% (recode(c), recode(n)))
if not pendings[c]:
# Parents are converted, node is eligible
actives.insert(0, c)
pendings[c] = None
if len(s) != len(parents):
raise util.Abort(_("not all revisions were sorted"))
return s
def writeauthormap(self):
authorfile = self.authorfile
if authorfile:
self.ui.status(_('writing author map file %s\n') % authorfile)
ofile = open(authorfile, 'w+')
for author in self.authors:
ofile.write("%s=%s\n" % (author, self.authors[author]))
ofile.close()
def readauthormap(self, authorfile):
afile = open(authorfile, 'r')
for line in afile:
line = line.strip()
if not line or line.startswith('#'):
continue
try:
srcauthor, dstauthor = line.split('=', 1)
except ValueError:
msg = _('ignoring bad line in author map file %s: %s\n')
self.ui.warn(msg % (authorfile, line.rstrip()))
continue
srcauthor = srcauthor.strip()
dstauthor = dstauthor.strip()
if self.authors.get(srcauthor) in (None, dstauthor):
msg = _('mapping author %s to %s\n')
self.ui.debug(msg % (srcauthor, dstauthor))
self.authors[srcauthor] = dstauthor
continue
m = _('overriding mapping for author %s, was %s, will be %s\n')
self.ui.status(m % (srcauthor, self.authors[srcauthor], dstauthor))
afile.close()
def cachecommit(self, rev):
commit = self.source.getcommit(rev)
commit.author = self.authors.get(commit.author, commit.author)
commit.branch = self.branchmap.get(commit.branch, commit.branch)
self.commitcache[rev] = commit
return commit
def copy(self, rev):
commit = self.commitcache[rev]
changes = self.source.getchanges(rev)
if isinstance(changes, basestring):
if changes == SKIPREV:
dest = SKIPREV
else:
dest = self.map[changes]
self.map[rev] = dest
return
files, copies = changes
pbranches = []
if commit.parents:
for prev in commit.parents:
if prev not in self.commitcache:
self.cachecommit(prev)
pbranches.append((self.map[prev],
self.commitcache[prev].branch))
self.dest.setbranch(commit.branch, pbranches)
try:
parents = self.splicemap[rev]
self.ui.status(_('spliced in %s as parents of %s\n') %
(parents, rev))
parents = [self.map.get(p, p) for p in parents]
except KeyError:
parents = [b[0] for b in pbranches]
source = progresssource(self.ui, self.source, len(files))
newnode = self.dest.putcommit(files, copies, parents, commit,
source, self.map)
source.close()
self.source.converted(rev, newnode)
self.map[rev] = newnode
def convert(self, sortmode):
try:
self.source.before()
self.dest.before()
self.source.setrevmap(self.map)
self.ui.status(_("scanning source...\n"))
heads = self.source.getheads()
parents = self.walktree(heads)
self.mergesplicemap(parents, self.splicemap)
self.ui.status(_("sorting...\n"))
t = self.toposort(parents, sortmode)
num = len(t)
c = None
self.ui.status(_("converting...\n"))
for i, c in enumerate(t):
num -= 1
desc = self.commitcache[c].desc
if "\n" in desc:
desc = desc.splitlines()[0]
# convert log message to local encoding without using
# tolocal() because the encoding.encoding convert()
# uses is 'utf-8'
self.ui.status("%d %s\n" % (num, recode(desc)))
self.ui.note(_("source: %s\n") % recode(c))
self.ui.progress(_('converting'), i, unit=_('revisions'),
total=len(t))
self.copy(c)
self.ui.progress(_('converting'), None)
tags = self.source.gettags()
ctags = {}
for k in tags:
v = tags[k]
if self.map.get(v, SKIPREV) != SKIPREV:
ctags[k] = self.map[v]
if c and ctags:
nrev, tagsparent = self.dest.puttags(ctags)
if nrev and tagsparent:
# write another hash correspondence to override the previous
# one so we don't end up with extra tag heads
tagsparents = [e for e in self.map.iteritems()
if e[1] == tagsparent]
if tagsparents:
self.map[tagsparents[0][0]] = nrev
bookmarks = self.source.getbookmarks()
cbookmarks = {}
for k in bookmarks:
v = bookmarks[k]
if self.map.get(v, SKIPREV) != SKIPREV:
cbookmarks[k] = self.map[v]
if c and cbookmarks:
self.dest.putbookmarks(cbookmarks)
self.writeauthormap()
finally:
self.cleanup()
def cleanup(self):
try:
self.dest.after()
finally:
self.source.after()
self.map.close()
def convert(ui, src, dest=None, revmapfile=None, **opts):
global orig_encoding
orig_encoding = encoding.encoding
encoding.encoding = 'UTF-8'
# support --authors as an alias for --authormap
if not opts.get('authormap'):
opts['authormap'] = opts.get('authors')
if not dest:
dest = hg.defaultdest(src) + "-hg"
ui.status(_("assuming destination %s\n") % dest)
destc = convertsink(ui, dest, opts.get('dest_type'))
try:
srcc, defaultsort = convertsource(ui, src, opts.get('source_type'),
opts.get('rev'))
except Exception:
for path in destc.created:
shutil.rmtree(path, True)
raise
sortmodes = ('branchsort', 'datesort', 'sourcesort', 'closesort')
sortmode = [m for m in sortmodes if opts.get(m)]
if len(sortmode) > 1:
raise util.Abort(_('more than one sort mode specified'))
sortmode = sortmode and sortmode[0] or defaultsort
if sortmode == 'sourcesort' and not srcc.hasnativeorder():
raise util.Abort(_('--sourcesort is not supported by this data source'))
if sortmode == 'closesort' and not srcc.hasnativeclose():
raise util.Abort(_('--closesort is not supported by this data source'))
fmap = opts.get('filemap')
if fmap:
srcc = filemap.filemap_source(ui, srcc, fmap)
destc.setfilemapmode(True)
if not revmapfile:
try:
revmapfile = destc.revmapfile()
except Exception:
revmapfile = os.path.join(destc, "map")
c = converter(ui, srcc, destc, revmapfile, opts)
c.convert(sortmode)