# context.py - changeset and file context objects for mercurial
#
# Copyright 2006 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
from node import *
from i18n import gettext as _
from demandload import demandload
demandload(globals(), "ancestor bdiff repo revlog util os")
class changectx(object):
"""A changecontext object makes access to data related to a particular
changeset convenient."""
def __init__(self, repo, changeid=None):
"""changeid is a revision number, node, or tag"""
self._repo = repo
if not changeid and changeid != 0:
p1, p2 = self._repo.dirstate.parents()
self._rev = self._repo.changelog.rev(p1)
if self._rev == -1:
changeid = 'tip'
else:
self._node = p1
return
self._node = self._repo.lookup(changeid)
self._rev = self._repo.changelog.rev(self._node)
def __str__(self):
return short(self.node())
def __repr__(self):
return "<changectx %s>" % str(self)
def __eq__(self, other):
try:
return self._rev == other._rev
except AttributeError:
return False
def __nonzero__(self):
return self._rev != nullrev
def __getattr__(self, name):
if name == '_changeset':
self._changeset = self._repo.changelog.read(self.node())
return self._changeset
elif name == '_manifest':
self._manifest = self._repo.manifest.read(self._changeset[0])
return self._manifest
elif name == '_manifestdelta':
md = self._repo.manifest.readdelta(self._changeset[0])
self._manifestdelta = md
return self._manifestdelta
else:
raise AttributeError, name
def changeset(self): return self._changeset
def manifest(self): return self._manifest
def rev(self): return self._rev
def node(self): return 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 parents(self):
"""return contexts for each parent changeset"""
p = self._repo.changelog.parents(self._node)
return [changectx(self._repo, x) for x in p]
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 filenode(self, path):
if '_manifest' in self.__dict__:
try:
return self._manifest[path]
except KeyError:
raise repo.LookupError(_("'%s' not found in manifest") % path)
if '_manifestdelta' in self.__dict__ or path in self.files():
if path in self._manifestdelta:
return self._manifestdelta[path]
node, flag = self._repo.manifest.find(self._changeset[0], path)
if not node:
raise repo.LookupError(_("'%s' not found in manifest") % path)
return node
def filectx(self, path, fileid=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)
def filectxs(self):
"""generate a file context for each file in this changeset's
manifest"""
mf = self.manifest()
m = mf.keys()
m.sort()
for f in m:
yield self.filectx(f, fileid=mf[f])
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)
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
if filelog:
self._filelog = filelog
if changectx:
self._changectx = changectx
self._changeid = changectx.node()
if fileid is None:
self._changeid = changeid
else:
self._fileid = fileid
def __getattr__(self, name):
if name == '_changectx':
self._changectx = changectx(self._repo, self._changeid)
return self._changectx
elif name == '_filelog':
self._filelog = self._repo.file(self._path)
return self._filelog
elif name == '_changeid':
self._changeid = self._filelog.linkrev(self._filenode)
return self._changeid
elif name == '_filenode':
try:
if '_fileid' in self.__dict__:
self._filenode = self._filelog.lookup(self._fileid)
else:
self._filenode = self._changectx.filenode(self._path)
except revlog.RevlogError, inst:
raise repo.LookupError(str(inst))
return self._filenode
elif name == '_filerev':
self._filerev = self._filelog.rev(self._filenode)
return self._filerev
else:
raise AttributeError, name
def __nonzero__(self):
try:
n = self._filenode
return True
except repo.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 __eq__(self, other):
try:
return (self._path == other._path
and self._changeid == other._changeid)
except AttributeError:
return False
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 filelog(self): return self._filelog
def rev(self):
if '_changectx' in self.__dict__:
return self._changectx.rev()
return self._filelog.linkrev(self._filenode)
def node(self): return self._changectx.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 renamed(self): return self._filelog.renamed(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 parents(self):
p = self._path
fl = self._filelog
pl = [(p, n, fl) for n in self._filelog.parents(self._filenode)]
r = self.renamed()
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):
'''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'''
def decorate(text, rev):
return ([rev] * len(text.splitlines()), text)
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.cachefunc(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.cachefunc(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._filelog.linkrev(self._filenode):
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 = []
files.reverse()
for f in files:
fn = [(n._filerev, n) for n in needed.keys() if n._path == f]
fn.sort()
visit.extend(fn)
hist = {}
for r, f in 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(1))
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 == None:
pl = [(n.path(), n.filenode()) for n in c.parents()]
acache[(c._path, None)] = pl
flcache = {self._path:self._filelog, fc2._path: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."""
def __init__(self, repo):
self._repo = repo
self._rev = None
self._node = None
def __str__(self):
return str(self._parents[0]) + "+"
def __nonzero__(self):
return True
def __getattr__(self, name):
if name == '_parents':
self._parents = self._repo.parents()
return self._parents
if name == '_status':
self._status = self._repo.status()
return self._status
if name == '_manifest':
self._buildmanifest()
return self._manifest
else:
raise AttributeError, name
def _buildmanifest(self):
"""generate a manifest corresponding to the working directory"""
man = self._parents[0].manifest().copy()
copied = self._repo.dirstate.copies()
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, util.is_exec(self._repo.wjoin(f), man.execf(f)))
except OSError:
pass
for f in deleted + removed:
if f in man:
del man[f]
self._manifest = man
def manifest(self): return self._manifest
def user(self): return self._repo.ui.username()
def date(self): return util.makedate()
def description(self): return ""
def files(self):
f = self.modified() + self.added() + self.removed()
f.sort()
return f
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._repo.dirstate.branch()
def parents(self):
"""return contexts for each parent changeset"""
return self._parents
def children(self):
return []
def filectx(self, path):
"""get a file context from the working directory"""
return workingfilectx(self._repo, path, workingctx=self)
def ancestor(self, c2):
"""return the ancestor context of self and c2"""
return self._parents[0].ancestor(c2) # punt on two parents for now
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
def __getattr__(self, name):
if name == '_changectx':
self._changectx = workingctx(repo)
return self._changectx
elif name == '_repopath':
self._repopath = (self._repo.dirstate.copied(self._path)
or self._path)
return self._repopath
elif name == '_filelog':
self._filelog = self._repo.file(self._repopath)
return self._filelog
else:
raise AttributeError, name
def __nonzero__(self):
return True
def __str__(self):
return "%s@%s" % (self.path(), self._changectx)
def filectx(self, fileid):
'''opens an arbitrary revision of the file without
opening a new filelog'''
return filectx(self._repo, self._repopath, fileid=fileid,
filelog=self._filelog)
def rev(self):
if '_changectx' in self.__dict__:
return self._changectx.rev()
return self._filelog.linkrev(self._filenode)
def data(self): return self._repo.wread(self._path)
def renamed(self):
rp = self._repopath
if rp == self._path:
return None
return rp, self._workingctx._parents._manifest.get(rp, nullid)
def parents(self):
'''return parent filectxs, following copies if necessary'''
p = self._path
rp = self._repopath
pcl = self._changectx._parents
fl = self._filelog
pl = [(rp, pcl[0]._manifest.get(rp, nullid), fl)]
if len(pcl) > 1:
if rp != p:
fl = None
pl.append((p, pcl[1]._manifest.get(p, nullid), 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 cmp(self, text): return self._repo.wread(self._path) == text