ref: a7c01127f9749fe471367c6461cde357403cc3b3
dir: /sys/src/cmd/hg/mercurial/filelog.py/
# filelog.py - file history class for mercurial
#
# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2, incorporated herein by reference.
import revlog
class filelog(revlog.revlog):
def __init__(self, opener, path):
revlog.revlog.__init__(self, opener,
"/".join(("data", path + ".i")))
def read(self, node):
t = self.revision(node)
if not t.startswith('\1\n'):
return t
s = t.index('\1\n', 2)
return t[s+2:]
def _readmeta(self, node):
t = self.revision(node)
if not t.startswith('\1\n'):
return {}
s = t.index('\1\n', 2)
mt = t[2:s]
m = {}
for l in mt.splitlines():
k, v = l.split(": ", 1)
m[k] = v
return m
def add(self, text, meta, transaction, link, p1=None, p2=None):
if meta or text.startswith('\1\n'):
mt = ""
if meta:
mt = ["%s: %s\n" % (k, v) for k, v in meta.iteritems()]
text = "\1\n%s\1\n%s" % ("".join(mt), text)
return self.addrevision(text, transaction, link, p1, p2)
def renamed(self, node):
if self.parents(node)[0] != revlog.nullid:
return False
m = self._readmeta(node)
if m and "copy" in m:
return (m["copy"], revlog.bin(m["copyrev"]))
return False
def size(self, rev):
"""return the size of a given revision"""
# for revisions with renames, we have to go the slow way
node = self.node(rev)
if self.renamed(node):
return len(self.read(node))
return revlog.revlog.size(self, rev)
def cmp(self, node, text):
"""compare text with a given file revision"""
# for renames, we have to go the slow way
if self.renamed(node):
t2 = self.read(node)
return t2 != text
return revlog.revlog.cmp(self, node, text)