contrib/dumprevlog

status: pass matcher to pathcopies()

Just like a7f8e3584ef3 (diff: pass the diff matcher to the copy logic,
2015-04-16) sped up 'hg diff --git $path', let's speed up 'hg st -C
$path'. On the Firefox repo, this speeds up

  hg st --rev tip~40000 --rev tip -C python

from 16s to 1.8s. Those two revisions differ in 100k files, out of
which 1k is in python/.

#!/usr/bin/env python
# Dump revlogs as raw data stream
# $ find .hg/store/ -name "*.i" | xargs dumprevlog > repo.dump

import sys
from mercurial import revlog, node, util

for fp in (sys.stdin, sys.stdout, sys.stderr):
    util.setbinary(fp)

for f in sys.argv[1:]:
    binopen = lambda fn: open(fn, 'rb')
    r = revlog.revlog(binopen, f)
    print "file:", f
    for i in r:
        n = r.node(i)
        p = r.parents(n)
        d = r.revision(n)
        print "node:", node.hex(n)
        print "linkrev:", r.linkrev(i)
        print "parents:", node.hex(p[0]), node.hex(p[1])
        print "length:", len(d)
        print "-start-"
        print d
        print "-end-"