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# context.py - changeset and file context objects for mercurial
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#
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# Copyright 2006, 2007 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms
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# of the GNU General Public License, incorporated herein by reference.
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from node import *
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from i18n import _
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import ancestor, bdiff, repo, revlog, util, os, errno
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class changectx(object):
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"""A changecontext object makes access to data related to a particular
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changeset convenient."""
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def __init__(self, repo, changeid=None):
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"""changeid is a revision number, node, or tag"""
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self._repo = repo
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if not changeid and changeid != 0:
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p1, p2 = self._repo.dirstate.parents()
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self._rev = self._repo.changelog.rev(p1)
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if self._rev == -1:
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changeid = 'tip'
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else:
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self._node = p1
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return
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self._node = self._repo.lookup(changeid)
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self._rev = self._repo.changelog.rev(self._node)
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def __str__(self):
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return short(self.node())
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def __repr__(self):
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return "<changectx %s>" % str(self)
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def __eq__(self, other):
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try:
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return self._rev == other._rev
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except AttributeError:
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return False
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def __nonzero__(self):
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return self._rev != nullrev
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def __getattr__(self, name):
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if name == '_changeset':
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self._changeset = self._repo.changelog.read(self.node())
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return self._changeset
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elif name == '_manifest':
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self._manifest = self._repo.manifest.read(self._changeset[0])
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return self._manifest
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elif name == '_manifestdelta':
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md = self._repo.manifest.readdelta(self._changeset[0])
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self._manifestdelta = md
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return self._manifestdelta
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else:
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raise AttributeError, name
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def changeset(self): return self._changeset
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def manifest(self): return self._manifest
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def rev(self): return self._rev
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def node(self): return self._node
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def user(self): return self._changeset[1]
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def date(self): return self._changeset[2]
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def files(self): return self._changeset[3]
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def description(self): return self._changeset[4]
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def branch(self): return self._changeset[5].get("branch")
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def tags(self): return self._repo.nodetags(self._node)
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def parents(self):
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"""return contexts for each parent changeset"""
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p = self._repo.changelog.parents(self._node)
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return [changectx(self._repo, x) for x in p]
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def children(self):
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"""return contexts for each child changeset"""
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c = self._repo.changelog.children(self._node)
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return [changectx(self._repo, x) for x in c]
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def filenode(self, path):
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if '_manifest' in self.__dict__:
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try:
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return self._manifest[path]
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except KeyError:
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raise revlog.LookupError(_("'%s' not found in manifest") % path)
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if '_manifestdelta' in self.__dict__ or path in self.files():
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if path in self._manifestdelta:
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return self._manifestdelta[path]
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node, flag = self._repo.manifest.find(self._changeset[0], path)
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if not node:
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raise revlog.LookupError(_("'%s' not found in manifest") % path)
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return node
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def filectx(self, path, fileid=None, filelog=None):
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"""get a file context from this changeset"""
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if fileid is None:
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fileid = self.filenode(path)
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return filectx(self._repo, path, fileid=fileid,
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changectx=self, filelog=filelog)
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def filectxs(self):
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"""generate a file context for each file in this changeset's
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manifest"""
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mf = self.manifest()
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m = mf.keys()
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m.sort()
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for f in m:
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yield self.filectx(f, fileid=mf[f])
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def ancestor(self, c2):
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"""
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return the ancestor context of self and c2
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"""
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n = self._repo.changelog.ancestor(self._node, c2._node)
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return changectx(self._repo, n)
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class filectx(object):
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"""A filecontext object makes access to data related to a particular
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filerevision convenient."""
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def __init__(self, repo, path, changeid=None, fileid=None,
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filelog=None, changectx=None):
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"""changeid can be a changeset revision, node, or tag.
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fileid can be a file revision or node."""
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self._repo = repo
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self._path = path
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assert (changeid is not None
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or fileid is not None
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or changectx is not None)
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if filelog:
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self._filelog = filelog
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if fileid is None:
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if changectx is None:
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self._changeid = changeid
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else:
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self._changectx = changectx
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else:
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self._fileid = fileid
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def __getattr__(self, name):
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if name == '_changectx':
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self._changectx = changectx(self._repo, self._changeid)
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return self._changectx
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elif name == '_filelog':
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self._filelog = self._repo.file(self._path)
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return self._filelog
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elif name == '_changeid':
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self._changeid = self._filelog.linkrev(self._filenode)
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return self._changeid
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elif name == '_filenode':
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if '_fileid' in self.__dict__:
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self._filenode = self._filelog.lookup(self._fileid)
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else:
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self._filenode = self._changectx.filenode(self._path)
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return self._filenode
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elif name == '_filerev':
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self._filerev = self._filelog.rev(self._filenode)
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return self._filerev
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else:
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raise AttributeError, name
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def __nonzero__(self):
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try:
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n = self._filenode
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return True
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except revlog.LookupError:
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# file is missing
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return False
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def __str__(self):
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return "%s@%s" % (self.path(), short(self.node()))
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def __repr__(self):
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return "<filectx %s>" % str(self)
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def __eq__(self, other):
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try:
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return (self._path == other._path
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and self._changeid == other._changeid)
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except AttributeError:
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return False
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def filectx(self, fileid):
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'''opens an arbitrary revision of the file without
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opening a new filelog'''
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return filectx(self._repo, self._path, fileid=fileid,
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filelog=self._filelog)
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def filerev(self): return self._filerev
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def filenode(self): return self._filenode
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def filelog(self): return self._filelog
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def rev(self):
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if '_changectx' in self.__dict__:
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return self._changectx.rev()
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return self._filelog.linkrev(self._filenode)
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def node(self): return self._changectx.node()
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def user(self): return self._changectx.user()
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def date(self): return self._changectx.date()
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def files(self): return self._changectx.files()
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def description(self): return self._changectx.description()
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def branch(self): return self._changectx.branch()
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def manifest(self): return self._changectx.manifest()
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def changectx(self): return self._changectx
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def data(self): return self._filelog.read(self._filenode)
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def renamed(self): return self._filelog.renamed(self._filenode)
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def path(self): return self._path
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def size(self): return self._filelog.size(self._filerev)
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def cmp(self, text): return self._filelog.cmp(self._filenode, text)
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def parents(self):
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p = self._path
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fl = self._filelog
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pl = [(p, n, fl) for n in self._filelog.parents(self._filenode)]
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r = self.renamed()
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if r:
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pl[0] = (r[0], r[1], None)
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return [filectx(self._repo, p, fileid=n, filelog=l)
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for p,n,l in pl if n != nullid]
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def children(self):
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# hard for renames
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c = self._filelog.children(self._filenode)
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return [filectx(self._repo, self._path, fileid=x,
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filelog=self._filelog) for x in c]
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def annotate(self, follow=False):
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'''returns a list of tuples of (ctx, line) for each line
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in the file, where ctx is the filectx of the node where
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that line was last changed'''
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def decorate(text, rev):
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return ([rev] * len(text.splitlines()), text)
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def pair(parent, child):
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for a1, a2, b1, b2 in bdiff.blocks(parent[1], child[1]):
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child[0][b1:b2] = parent[0][a1:a2]
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return child
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getlog = util.cachefunc(lambda x: self._repo.file(x))
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def getctx(path, fileid):
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log = path == self._path and self._filelog or getlog(path)
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return filectx(self._repo, path, fileid=fileid, filelog=log)
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getctx = util.cachefunc(getctx)
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def parents(f):
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# we want to reuse filectx objects as much as possible
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p = f._path
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if f._filerev is None: # working dir
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pl = [(n.path(), n.filerev()) for n in f.parents()]
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else:
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pl = [(p, n) for n in f._filelog.parentrevs(f._filerev)]
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if follow:
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r = f.renamed()
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if r:
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pl[0] = (r[0], getlog(r[0]).rev(r[1]))
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return [getctx(p, n) for p, n in pl if n != nullrev]
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# use linkrev to find the first changeset where self appeared
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if self.rev() != self._filelog.linkrev(self._filenode):
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base = self.filectx(self.filerev())
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else:
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base = self
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# find all ancestors
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needed = {base: 1}
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visit = [base]
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files = [base._path]
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while visit:
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f = visit.pop(0)
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for p in parents(f):
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if p not in needed:
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needed[p] = 1
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visit.append(p)
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if p._path not in files:
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files.append(p._path)
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else:
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# count how many times we'll use this
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needed[p] += 1
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# sort by revision (per file) which is a topological order
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visit = []
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for f in files:
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fn = [(n.rev(), n) for n in needed.keys() if n._path == f]
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visit.extend(fn)
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visit.sort()
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hist = {}
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for r, f in visit:
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curr = decorate(f.data(), f)
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for p in parents(f):
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if p != nullid:
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curr = pair(hist[p], curr)
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# trim the history of unneeded revs
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needed[p] -= 1
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if not needed[p]:
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del hist[p]
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hist[f] = curr
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return zip(hist[f][0], hist[f][1].splitlines(1))
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def ancestor(self, fc2):
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"""
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find the common ancestor file context, if any, of self, and fc2
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"""
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acache = {}
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# prime the ancestor cache for the working directory
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for c in (self, fc2):
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if c._filerev == None:
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pl = [(n.path(), n.filenode()) for n in c.parents()]
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acache[(c._path, None)] = pl
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flcache = {self._path:self._filelog, fc2._path:fc2._filelog}
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def parents(vertex):
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if vertex in acache:
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return acache[vertex]
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f, n = vertex
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if f not in flcache:
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flcache[f] = self._repo.file(f)
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fl = flcache[f]
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pl = [(f, p) for p in fl.parents(n) if p != nullid]
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re = fl.renamed(n)
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if re:
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pl.append(re)
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acache[vertex] = pl
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return pl
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a, b = (self._path, self._filenode), (fc2._path, fc2._filenode)
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v = ancestor.ancestor(a, b, parents)
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if v:
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f, n = v
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return filectx(self._repo, f, fileid=n, filelog=flcache[f])
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return None
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class workingctx(changectx):
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"""A workingctx object makes access to data related to
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the current working directory convenient."""
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def __init__(self, repo):
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self._repo = repo
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self._rev = None
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self._node = None
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def __str__(self):
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return str(self._parents[0]) + "+"
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def __nonzero__(self):
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return True
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def __getattr__(self, name):
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if name == '_parents':
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self._parents = self._repo.parents()
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return self._parents
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if name == '_status':
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self._status = self._repo.status()
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return self._status
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if name == '_manifest':
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self._buildmanifest()
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return self._manifest
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else:
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raise AttributeError, name
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def _buildmanifest(self):
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"""generate a manifest corresponding to the working directory"""
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man = self._parents[0].manifest().copy()
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is_exec = util.execfunc(self._repo.root, man.execf)
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is_link = util.linkfunc(self._repo.root, man.linkf)
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copied = self._repo.dirstate.copies()
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modified, added, removed, deleted, unknown = self._status[:5]
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for i, l in (("a", added), ("m", modified), ("u", unknown)):
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for f in l:
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man[f] = man.get(copied.get(f, f), nullid) + i
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try:
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man.set(f, is_exec(f), is_link(f))
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except OSError:
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pass
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for f in deleted + removed:
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if f in man:
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del man[f]
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self._manifest = man
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def manifest(self): return self._manifest
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def user(self): return self._repo.ui.username()
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def date(self): return util.makedate()
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def description(self): return ""
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def files(self):
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f = self.modified() + self.added() + self.removed()
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f.sort()
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return f
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def modified(self): return self._status[0]
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def added(self): return self._status[1]
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def removed(self): return self._status[2]
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def deleted(self): return self._status[3]
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def unknown(self): return self._status[4]
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def clean(self): return self._status[5]
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def branch(self): return self._repo.dirstate.branch()
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def tags(self):
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t = []
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[t.extend(p.tags()) for p in self.parents()]
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return t
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def parents(self):
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"""return contexts for each parent changeset"""
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return self._parents
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def children(self):
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return []
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def filectx(self, path, filelog=None):
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"""get a file context from the working directory"""
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return workingfilectx(self._repo, path, workingctx=self,
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filelog=filelog)
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def ancestor(self, c2):
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"""return the ancestor context of self and c2"""
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return self._parents[0].ancestor(c2) # punt on two parents for now
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class workingfilectx(filectx):
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"""A workingfilectx object makes access to data related to a particular
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file in the working directory convenient."""
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def __init__(self, repo, path, filelog=None, workingctx=None):
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"""changeid can be a changeset revision, node, or tag.
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fileid can be a file revision or node."""
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self._repo = repo
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self._path = path
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self._changeid = None
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self._filerev = self._filenode = None
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if filelog:
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self._filelog = filelog
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if workingctx:
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self._changectx = workingctx
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def __getattr__(self, name):
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if name == '_changectx':
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self._changectx = workingctx(self._repo)
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return self._changectx
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elif name == '_repopath':
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self._repopath = (self._repo.dirstate.copied(self._path)
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or self._path)
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return self._repopath
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elif name == '_filelog':
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self._filelog = self._repo.file(self._repopath)
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return self._filelog
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else:
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raise AttributeError, name
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def __nonzero__(self):
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return True
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def __str__(self):
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return "%s@%s" % (self.path(), self._changectx)
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def filectx(self, fileid):
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'''opens an arbitrary revision of the file without
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opening a new filelog'''
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return filectx(self._repo, self._repopath, fileid=fileid,
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filelog=self._filelog)
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def rev(self):
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if '_changectx' in self.__dict__:
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return self._changectx.rev()
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return self._filelog.linkrev(self._filenode)
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def data(self): return self._repo.wread(self._path)
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def renamed(self):
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rp = self._repopath
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if rp == self._path:
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return None
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return rp, self._changectx._parents[0]._manifest.get(rp, nullid)
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def parents(self):
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'''return parent filectxs, following copies if necessary'''
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p = self._path
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rp = self._repopath
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pcl = self._changectx._parents
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fl = self._filelog
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pl = [(rp, pcl[0]._manifest.get(rp, nullid), fl)]
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if len(pcl) > 1:
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if rp != p:
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fl = None
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pl.append((p, pcl[1]._manifest.get(p, nullid), fl))
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return [filectx(self._repo, p, fileid=n, filelog=l)
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for p,n,l in pl if n != nullid]
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def children(self):
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return []
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def size(self): return os.stat(self._repo.wjoin(self._path)).st_size
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def date(self):
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t, tz = self._changectx.date()
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try:
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return (int(os.lstat(self._repo.wjoin(self._path)).st_mtime), tz)
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except OSError, err:
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if err.errno != errno.ENOENT: raise
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return (t, tz)
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def cmp(self, text): return self._repo.wread(self._path) == text
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|
