ref: 01afe9328b3ddf51c1ab2725684fc542bc81f76c
dir: /sys/lib/python/mercurial/context.py/
# context.py - changeset and file context objects for mercurial
#
# Copyright 2006, 2007 Matt Mackall <[email protected]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2, incorporated herein by reference.
from node import nullid, nullrev, short, hex
from i18n import _
import ancestor, bdiff, error, util, subrepo
import os, errno
propertycache = util.propertycache
class changectx(object):
"""A changecontext object makes access to data related to a particular
changeset convenient."""
def __init__(self, repo, changeid=''):
"""changeid is a revision number, node, or tag"""
if changeid == '':
changeid = '.'
self._repo = repo
if isinstance(changeid, (long, int)):
self._rev = changeid
self._node = self._repo.changelog.node(changeid)
else:
self._node = self._repo.lookup(changeid)
self._rev = self._repo.changelog.rev(self._node)
def __str__(self):
return short(self.node())
def __int__(self):
return self.rev()
def __repr__(self):
return "<changectx %s>" % str(self)
def __hash__(self):
try:
return hash(self._rev)
except AttributeError:
return id(self)
def __eq__(self, other):
try:
return self._rev == other._rev
except AttributeError:
return False
def __ne__(self, other):
return not (self == other)
def __nonzero__(self):
return self._rev != nullrev
@propertycache
def _changeset(self):
return self._repo.changelog.read(self.node())
@propertycache
def _manifest(self):
return self._repo.manifest.read(self._changeset[0])
@propertycache
def _manifestdelta(self):
return self._repo.manifest.readdelta(self._changeset[0])
@propertycache
def _parents(self):
p = self._repo.changelog.parentrevs(self._rev)
if p[1] == nullrev:
p = p[:-1]
return [changectx(self._repo, x) for x in p]
@propertycache
def substate(self):
return subrepo.state(self)
def __contains__(self, key):
return key in self._manifest
def __getitem__(self, key):
return self.filectx(key)
def __iter__(self):
for f in sorted(self._manifest):
yield f
def changeset(self): return self._changeset
def manifest(self): return self._manifest
def manifestnode(self): return self._changeset[0]
def rev(self): return self._rev
def node(self): return self._node
def hex(self): return hex(self._node)
def user(self): return self._changeset[1]
def date(self): return self._changeset[2]
def files(self): return self._changeset[3]
def description(self): return self._changeset[4]
def branch(self): return self._changeset[5].get("branch")
def extra(self): return self._changeset[5]
def tags(self): return self._repo.nodetags(self._node)
def parents(self):
"""return contexts for each parent changeset"""
return self._parents
def p1(self):
return self._parents[0]
def p2(self):
if len(self._parents) == 2:
return self._parents[1]
return changectx(self._repo, -1)
def children(self):
"""return contexts for each child changeset"""
c = self._repo.changelog.children(self._node)
return [changectx(self._repo, x) for x in c]
def ancestors(self):
for a in self._repo.changelog.ancestors(self._rev):
yield changectx(self._repo, a)
def descendants(self):
for d in self._repo.changelog.descendants(self._rev):
yield changectx(self._repo, d)
def _fileinfo(self, path):
if '_manifest' in self.__dict__:
try:
return self._manifest[path], self._manifest.flags(path)
except KeyError:
raise error.LookupError(self._node, path,
_('not found in manifest'))
if '_manifestdelta' in self.__dict__ or path in self.files():
if path in self._manifestdelta:
return self._manifestdelta[path], self._manifestdelta.flags(path)
node, flag = self._repo.manifest.find(self._changeset[0], path)
if not node:
raise error.LookupError(self._node, path,
_('not found in manifest'))
return node, flag
def filenode(self, path):
return self._fileinfo(path)[0]
def flags(self, path):
try:
return self._fileinfo(path)[1]
except error.LookupError:
return ''
def filectx(self, path, fileid=None, filelog=None):
"""get a file context from this changeset"""
if fileid is None:
fileid = self.filenode(path)
return filectx(self._repo, path, fileid=fileid,
changectx=self, filelog=filelog)
def ancestor(self, c2):
"""
return the ancestor context of self and c2
"""
n = self._repo.changelog.ancestor(self._node, c2._node)
return changectx(self._repo, n)
def walk(self, match):
fset = set(match.files())
# for dirstate.walk, files=['.'] means "walk the whole tree".
# follow that here, too
fset.discard('.')
for fn in self:
for ffn in fset:
# match if the file is the exact name or a directory
if ffn == fn or fn.startswith("%s/" % ffn):
fset.remove(ffn)
break
if match(fn):
yield fn
for fn in sorted(fset):
if match.bad(fn, 'No such file in rev ' + str(self)) and match(fn):
yield fn
def sub(self, path):
return subrepo.subrepo(self, path)
class filectx(object):
"""A filecontext object makes access to data related to a particular
filerevision convenient."""
def __init__(self, repo, path, changeid=None, fileid=None,
filelog=None, changectx=None):
"""changeid can be a changeset revision, node, or tag.
fileid can be a file revision or node."""
self._repo = repo
self._path = path
assert (changeid is not None
or fileid is not None
or changectx is not None), \
("bad args: changeid=%r, fileid=%r, changectx=%r"
% (changeid, fileid, changectx))
if filelog:
self._filelog = filelog
if changeid is not None:
self._changeid = changeid
if changectx is not None:
self._changectx = changectx
if fileid is not None:
self._fileid = fileid
@propertycache
def _changectx(self):
return changectx(self._repo, self._changeid)
@propertycache
def _filelog(self):
return self._repo.file(self._path)
@propertycache
def _changeid(self):
if '_changectx' in self.__dict__:
return self._changectx.rev()
else:
return self._filelog.linkrev(self._filerev)
@propertycache
def _filenode(self):
if '_fileid' in self.__dict__:
return self._filelog.lookup(self._fileid)
else:
return self._changectx.filenode(self._path)
@propertycache
def _filerev(self):
return self._filelog.rev(self._filenode)
@propertycache
def _repopath(self):
return self._path
def __nonzero__(self):
try:
self._filenode
return True
except error.LookupError:
# file is missing
return False
def __str__(self):
return "%s@%s" % (self.path(), short(self.node()))
def __repr__(self):
return "<filectx %s>" % str(self)
def __hash__(self):
try:
return hash((self._path, self._fileid))
except AttributeError:
return id(self)
def __eq__(self, other):
try:
return (self._path == other._path
and self._fileid == other._fileid)
except AttributeError:
return False
def __ne__(self, other):
return not (self == other)
def filectx(self, fileid):
'''opens an arbitrary revision of the file without
opening a new filelog'''
return filectx(self._repo, self._path, fileid=fileid,
filelog=self._filelog)
def filerev(self): return self._filerev
def filenode(self): return self._filenode
def flags(self): return self._changectx.flags(self._path)
def filelog(self): return self._filelog
def rev(self):
if '_changectx' in self.__dict__:
return self._changectx.rev()
if '_changeid' in self.__dict__:
return self._changectx.rev()
return self._filelog.linkrev(self._filerev)
def linkrev(self): return self._filelog.linkrev(self._filerev)
def node(self): return self._changectx.node()
def hex(self): return hex(self.node())
def user(self): return self._changectx.user()
def date(self): return self._changectx.date()
def files(self): return self._changectx.files()
def description(self): return self._changectx.description()
def branch(self): return self._changectx.branch()
def manifest(self): return self._changectx.manifest()
def changectx(self): return self._changectx
def data(self): return self._filelog.read(self._filenode)
def path(self): return self._path
def size(self): return self._filelog.size(self._filerev)
def cmp(self, text): return self._filelog.cmp(self._filenode, text)
def renamed(self):
"""check if file was actually renamed in this changeset revision
If rename logged in file revision, we report copy for changeset only
if file revisions linkrev points back to the changeset in question
or both changeset parents contain different file revisions.
"""
renamed = self._filelog.renamed(self._filenode)
if not renamed:
return renamed
if self.rev() == self.linkrev():
return renamed
name = self.path()
fnode = self._filenode
for p in self._changectx.parents():
try:
if fnode == p.filenode(name):
return None
except error.LookupError:
pass
return renamed
def parents(self):
p = self._path
fl = self._filelog
pl = [(p, n, fl) for n in self._filelog.parents(self._filenode)]
r = self._filelog.renamed(self._filenode)
if r:
pl[0] = (r[0], r[1], None)
return [filectx(self._repo, p, fileid=n, filelog=l)
for p,n,l in pl if n != nullid]
def children(self):
# hard for renames
c = self._filelog.children(self._filenode)
return [filectx(self._repo, self._path, fileid=x,
filelog=self._filelog) for x in c]
def annotate(self, follow=False, linenumber=None):
'''returns a list of tuples of (ctx, line) for each line
in the file, where ctx is the filectx of the node where
that line was last changed.
This returns tuples of ((ctx, linenumber), line) for each line,
if "linenumber" parameter is NOT "None".
In such tuples, linenumber means one at the first appearance
in the managed file.
To reduce annotation cost,
this returns fixed value(False is used) as linenumber,
if "linenumber" parameter is "False".'''
def decorate_compat(text, rev):
return ([rev] * len(text.splitlines()), text)
def without_linenumber(text, rev):
return ([(rev, False)] * len(text.splitlines()), text)
def with_linenumber(text, rev):
size = len(text.splitlines())
return ([(rev, i) for i in xrange(1, size + 1)], text)
decorate = (((linenumber is None) and decorate_compat) or
(linenumber and with_linenumber) or
without_linenumber)
def pair(parent, child):
for a1, a2, b1, b2 in bdiff.blocks(parent[1], child[1]):
child[0][b1:b2] = parent[0][a1:a2]
return child
getlog = util.lrucachefunc(lambda x: self._repo.file(x))
def getctx(path, fileid):
log = path == self._path and self._filelog or getlog(path)
return filectx(self._repo, path, fileid=fileid, filelog=log)
getctx = util.lrucachefunc(getctx)
def parents(f):
# we want to reuse filectx objects as much as possible
p = f._path
if f._filerev is None: # working dir
pl = [(n.path(), n.filerev()) for n in f.parents()]
else:
pl = [(p, n) for n in f._filelog.parentrevs(f._filerev)]
if follow:
r = f.renamed()
if r:
pl[0] = (r[0], getlog(r[0]).rev(r[1]))
return [getctx(p, n) for p, n in pl if n != nullrev]
# use linkrev to find the first changeset where self appeared
if self.rev() != self.linkrev():
base = self.filectx(self.filerev())
else:
base = self
# find all ancestors
needed = {base: 1}
visit = [base]
files = [base._path]
while visit:
f = visit.pop(0)
for p in parents(f):
if p not in needed:
needed[p] = 1
visit.append(p)
if p._path not in files:
files.append(p._path)
else:
# count how many times we'll use this
needed[p] += 1
# sort by revision (per file) which is a topological order
visit = []
for f in files:
fn = [(n.rev(), n) for n in needed if n._path == f]
visit.extend(fn)
hist = {}
for r, f in sorted(visit):
curr = decorate(f.data(), f)
for p in parents(f):
if p != nullid:
curr = pair(hist[p], curr)
# trim the history of unneeded revs
needed[p] -= 1
if not needed[p]:
del hist[p]
hist[f] = curr
return zip(hist[f][0], hist[f][1].splitlines(True))
def ancestor(self, fc2):
"""
find the common ancestor file context, if any, of self, and fc2
"""
acache = {}
# prime the ancestor cache for the working directory
for c in (self, fc2):
if c._filerev is None:
pl = [(n.path(), n.filenode()) for n in c.parents()]
acache[(c._path, None)] = pl
flcache = {self._repopath:self._filelog, fc2._repopath:fc2._filelog}
def parents(vertex):
if vertex in acache:
return acache[vertex]
f, n = vertex
if f not in flcache:
flcache[f] = self._repo.file(f)
fl = flcache[f]
pl = [(f, p) for p in fl.parents(n) if p != nullid]
re = fl.renamed(n)
if re:
pl.append(re)
acache[vertex] = pl
return pl
a, b = (self._path, self._filenode), (fc2._path, fc2._filenode)
v = ancestor.ancestor(a, b, parents)
if v:
f, n = v
return filectx(self._repo, f, fileid=n, filelog=flcache[f])
return None
class workingctx(changectx):
"""A workingctx object makes access to data related to
the current working directory convenient.
parents - a pair of parent nodeids, or None to use the dirstate.
date - any valid date string or (unixtime, offset), or None.
user - username string, or None.
extra - a dictionary of extra values, or None.
changes - a list of file lists as returned by localrepo.status()
or None to use the repository status.
"""
def __init__(self, repo, parents=None, text="", user=None, date=None,
extra=None, changes=None):
self._repo = repo
self._rev = None
self._node = None
self._text = text
if date:
self._date = util.parsedate(date)
if user:
self._user = user
if parents:
self._parents = [changectx(self._repo, p) for p in parents]
if changes:
self._status = list(changes)
self._extra = {}
if extra:
self._extra = extra.copy()
if 'branch' not in self._extra:
branch = self._repo.dirstate.branch()
try:
branch = branch.decode('UTF-8').encode('UTF-8')
except UnicodeDecodeError:
raise util.Abort(_('branch name not in UTF-8!'))
self._extra['branch'] = branch
if self._extra['branch'] == '':
self._extra['branch'] = 'default'
def __str__(self):
return str(self._parents[0]) + "+"
def __nonzero__(self):
return True
def __contains__(self, key):
return self._repo.dirstate[key] not in "?r"
@propertycache
def _manifest(self):
"""generate a manifest corresponding to the working directory"""
man = self._parents[0].manifest().copy()
copied = self._repo.dirstate.copies()
cf = lambda x: man.flags(copied.get(x, x))
ff = self._repo.dirstate.flagfunc(cf)
modified, added, removed, deleted, unknown = self._status[:5]
for i, l in (("a", added), ("m", modified), ("u", unknown)):
for f in l:
man[f] = man.get(copied.get(f, f), nullid) + i
try:
man.set(f, ff(f))
except OSError:
pass
for f in deleted + removed:
if f in man:
del man[f]
return man
@propertycache
def _status(self):
return self._repo.status(unknown=True)
@propertycache
def _user(self):
return self._repo.ui.username()
@propertycache
def _date(self):
return util.makedate()
@propertycache
def _parents(self):
p = self._repo.dirstate.parents()
if p[1] == nullid:
p = p[:-1]
self._parents = [changectx(self._repo, x) for x in p]
return self._parents
def manifest(self): return self._manifest
def user(self): return self._user or self._repo.ui.username()
def date(self): return self._date
def description(self): return self._text
def files(self):
return sorted(self._status[0] + self._status[1] + self._status[2])
def modified(self): return self._status[0]
def added(self): return self._status[1]
def removed(self): return self._status[2]
def deleted(self): return self._status[3]
def unknown(self): return self._status[4]
def clean(self): return self._status[5]
def branch(self): return self._extra['branch']
def extra(self): return self._extra
def tags(self):
t = []
[t.extend(p.tags()) for p in self.parents()]
return t
def children(self):
return []
def flags(self, path):
if '_manifest' in self.__dict__:
try:
return self._manifest.flags(path)
except KeyError:
return ''
pnode = self._parents[0].changeset()[0]
orig = self._repo.dirstate.copies().get(path, path)
node, flag = self._repo.manifest.find(pnode, orig)
try:
ff = self._repo.dirstate.flagfunc(lambda x: flag or '')
return ff(path)
except OSError:
pass
if not node or path in self.deleted() or path in self.removed():
return ''
return flag
def filectx(self, path, filelog=None):
"""get a file context from the working directory"""
return workingfilectx(self._repo, path, workingctx=self,
filelog=filelog)
def ancestor(self, c2):
"""return the ancestor context of self and c2"""
return self._parents[0].ancestor(c2) # punt on two parents for now
def walk(self, match):
return sorted(self._repo.dirstate.walk(match, True, False))
def dirty(self, missing=False):
"check whether a working directory is modified"
return (self.p2() or self.branch() != self.p1().branch() or
self.modified() or self.added() or self.removed() or
(missing and self.deleted()))
class workingfilectx(filectx):
"""A workingfilectx object makes access to data related to a particular
file in the working directory convenient."""
def __init__(self, repo, path, filelog=None, workingctx=None):
"""changeid can be a changeset revision, node, or tag.
fileid can be a file revision or node."""
self._repo = repo
self._path = path
self._changeid = None
self._filerev = self._filenode = None
if filelog:
self._filelog = filelog
if workingctx:
self._changectx = workingctx
@propertycache
def _changectx(self):
return workingctx(self._repo)
def __nonzero__(self):
return True
def __str__(self):
return "%s@%s" % (self.path(), self._changectx)
def data(self): return self._repo.wread(self._path)
def renamed(self):
rp = self._repo.dirstate.copied(self._path)
if not rp:
return None
return rp, self._changectx._parents[0]._manifest.get(rp, nullid)
def parents(self):
'''return parent filectxs, following copies if necessary'''
def filenode(ctx, path):
return ctx._manifest.get(path, nullid)
path = self._path
fl = self._filelog
pcl = self._changectx._parents
renamed = self.renamed()
if renamed:
pl = [renamed + (None,)]
else:
pl = [(path, filenode(pcl[0], path), fl)]
for pc in pcl[1:]:
pl.append((path, filenode(pc, path), fl))
return [filectx(self._repo, p, fileid=n, filelog=l)
for p,n,l in pl if n != nullid]
def children(self):
return []
def size(self): return os.stat(self._repo.wjoin(self._path)).st_size
def date(self):
t, tz = self._changectx.date()
try:
return (int(os.lstat(self._repo.wjoin(self._path)).st_mtime), tz)
except OSError, err:
if err.errno != errno.ENOENT: raise
return (t, tz)
def cmp(self, text): return self._repo.wread(self._path) == text
class memctx(object):
"""Use memctx to perform in-memory commits via localrepo.commitctx().
Revision information is supplied at initialization time while
related files data and is made available through a callback
mechanism. 'repo' is the current localrepo, 'parents' is a
sequence of two parent revisions identifiers (pass None for every
missing parent), 'text' is the commit message and 'files' lists
names of files touched by the revision (normalized and relative to
repository root).
filectxfn(repo, memctx, path) is a callable receiving the
repository, the current memctx object and the normalized path of
requested file, relative to repository root. It is fired by the
commit function for every file in 'files', but calls order is
undefined. If the file is available in the revision being
committed (updated or added), filectxfn returns a memfilectx
object. If the file was removed, filectxfn raises an
IOError. Moved files are represented by marking the source file
removed and the new file added with copy information (see
memfilectx).
user receives the committer name and defaults to current
repository username, date is the commit date in any format
supported by util.parsedate() and defaults to current date, extra
is a dictionary of metadata or is left empty.
"""
def __init__(self, repo, parents, text, files, filectxfn, user=None,
date=None, extra=None):
self._repo = repo
self._rev = None
self._node = None
self._text = text
self._date = date and util.parsedate(date) or util.makedate()
self._user = user
parents = [(p or nullid) for p in parents]
p1, p2 = parents
self._parents = [changectx(self._repo, p) for p in (p1, p2)]
files = sorted(set(files))
self._status = [files, [], [], [], []]
self._filectxfn = filectxfn
self._extra = extra and extra.copy() or {}
if 'branch' not in self._extra:
self._extra['branch'] = 'default'
elif self._extra.get('branch') == '':
self._extra['branch'] = 'default'
def __str__(self):
return str(self._parents[0]) + "+"
def __int__(self):
return self._rev
def __nonzero__(self):
return True
def __getitem__(self, key):
return self.filectx(key)
def p1(self): return self._parents[0]
def p2(self): return self._parents[1]
def user(self): return self._user or self._repo.ui.username()
def date(self): return self._date
def description(self): return self._text
def files(self): return self.modified()
def modified(self): return self._status[0]
def added(self): return self._status[1]
def removed(self): return self._status[2]
def deleted(self): return self._status[3]
def unknown(self): return self._status[4]
def clean(self): return self._status[5]
def branch(self): return self._extra['branch']
def extra(self): return self._extra
def flags(self, f): return self[f].flags()
def parents(self):
"""return contexts for each parent changeset"""
return self._parents
def filectx(self, path, filelog=None):
"""get a file context from the working directory"""
return self._filectxfn(self._repo, self, path)
class memfilectx(object):
"""memfilectx represents an in-memory file to commit.
See memctx for more details.
"""
def __init__(self, path, data, islink, isexec, copied):
"""
path is the normalized file path relative to repository root.
data is the file content as a string.
islink is True if the file is a symbolic link.
isexec is True if the file is executable.
copied is the source file path if current file was copied in the
revision being committed, or None."""
self._path = path
self._data = data
self._flags = (islink and 'l' or '') + (isexec and 'x' or '')
self._copied = None
if copied:
self._copied = (copied, nullid)
def __nonzero__(self): return True
def __str__(self): return "%s@%s" % (self.path(), self._changectx)
def path(self): return self._path
def data(self): return self._data
def flags(self): return self._flags
def isexec(self): return 'x' in self._flags
def islink(self): return 'l' in self._flags
def renamed(self): return self._copied