# context.py - changeset and file context objects for mercurial
#
# Copyright 2006, 2007 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 _
import ancestor, bdiff, repo, revlog, util, os, errno
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 __ne__(self, other):
return not (self == other)
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 __contains__(self, key):
return key in self._manifest
def __getitem__(self, key):
return self.filectx(key)
def __iter__(self):
a = self._manifest.keys()
a.sort()
for f in a:
yield f
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 extra(self): return self._changeset[5]
def tags(self): return self._repo.nodetags(self._node)
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 _fileinfo(self, path):
if '_manifest' in self.__dict__:
try:
return self._manifest[path], self._manifest.flags(path)
except KeyError:
raise revlog.LookupError(path, _("'%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], self._manifestdelta.flags(path)
node, flag = self._repo.manifest.find(self._changeset[0], path)
if not node:
raise revlog.LookupError(path, _("'%s' not found in manifest") % path)
return node, flag
def filenode(self, path):
return self._fileinfo(path)[0]
def fileflags(self, path):
try:
return self._fileinfo(path)[1]
except revlog.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 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
or changectx is not None)
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
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':
if '_changectx' in self.__dict__:
self._changeid = self._changectx.rev()
else:
self._changeid = self._filelog.linkrev(self._filenode)
return self._changeid
elif name == '_filenode':
if '_fileid' in self.__dict__:
self._filenode = self._filelog.lookup(self._fileid)
else:
self._filenode = self._changectx.filenode(self._path)
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 revlog.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._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 fileflags(self): return self._changectx.fileflags(self._path)
def isexec(self): return 'x' in self.fileflags()
def islink(self): return 'l' in self.fileflags()
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._filenode)
def linkrev(self): 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 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 revlog.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.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.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.keys() if n._path == f]
visit.extend(fn)
visit.sort()
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()
is_exec = util.execfunc(self._repo.root,
lambda p: man.execf(copied.get(p,p)))
is_link = util.linkfunc(self._repo.root,
lambda p: man.linkf(copied.get(p,p)))
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, is_exec(f), is_link(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 tags(self):
t = []
[t.extend(p.tags()) for p in self.parents()]
return t
def parents(self):
"""return contexts for each parent changeset"""
return self._parents
def children(self):
return []
def fileflags(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)
is_link = util.linkfunc(self._repo.root, lambda p: 'l' in flag)
is_exec = util.execfunc(self._repo.root, lambda p: 'x' in flag)
try:
return (is_link(path) and 'l' or '') + (is_exec(path) and 'e' or '')
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
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(self._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._changectx._parents[0]._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 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