mercurial/context.py
author Lee Cantey <lcantey@gmail.com>
Thu, 06 Jul 2006 09:26:31 -0700
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# context.py - changeset and file context objects for mercurial
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#
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# Copyright 2005 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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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):
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        """changeid is a revision number, node, or tag"""
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        self._repo = repo
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        self._id = changeid
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        self._node = self._repo.lookup(self._id)
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        self._rev = self._repo.changelog.rev(self._node)
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    def changeset(self):
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        try:
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            return self._changeset
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        except AttributeError:
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            self._changeset = self._repo.changelog.read(self.node())
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            return self._changeset
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    def manifest(self):
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        try:
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            return self._manifest
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        except AttributeError:
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            self._manifest = self._repo.manifest.read(self.changeset()[0])
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            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 changedfiles(self): return self.changeset()[3]
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    def description(self): return self.changeset()[4]
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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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        node, flag = self._repo.manifest.find(self.changeset()[0], path)
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        return node
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    def filectx(self, path):
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        """get a file context from this changeset"""
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        return filectx(self._repo, path, fileid=self.filenode(path))
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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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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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        """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._id = changeid
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        self._fileid = fileid
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        if self._id:
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            # if given a changeset id, go ahead and look up the file
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            self._changeset = changectx(repo, self._id)
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            node, flag = self._repo.manifest.find(self._changeset[0], path)
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            self._node = node
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            self._filelog = self.repo.file(self._path)
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        elif self._fileid:
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            # else be lazy
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            self._filelog = self._repo.file(self._path)
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            self._filenode = self._filelog.lookup(self._fileid)
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        self._filerev = self._filelog.rev(self._filenode)
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    def changeset(self):
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        try:
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            return self._changeset
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        except AttributeError:
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            self._changeset = self._repo.changelog.read(self.node())
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            return self._changeset
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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): return self.changeset().rev()
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    def node(self): return self.changeset().node()
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    def user(self): return self.changeset().user()
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    def date(self): return self.changeset().date()
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    def files(self): return self.changeset().files()
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    def description(self): return self.changeset().description()
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    def manifest(self): return self.changeset().manifest()
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    def data(self): return self._filelog.read(self._filenode)
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    def metadata(self): return self._filelog.readmeta(self._filenode)
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    def renamed(self): return self._filelog.renamed(self._filenode)
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    def parents(self):
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        # need to fix for renames
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        p = self._filelog.parents(self._filenode)
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        return [ filectx(self._repo, self._path, fileid=x) for x in p ]
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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) for x in c ]
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    def annotate(self):
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        return self._filelog.annotate(self._filenode)