contrib/dumprevlog

remotenames: mark the extension as EXPERIMENTAL

I still don't feel confident about locking the behavior of all the things in
the remotenames extension. Moreover the extension was introduced in this cycle
only. Let's mark this extension EXPERIMENTAL for now so that we can change
things especially the storage layer if required in next cycle.

I will like to use cbor at storage layer too.

Differential Revision: https://phab.mercurial-scm.org/D3426

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

from __future__ import absolute_import, print_function

import sys
from mercurial import (
    node,
    revlog,
)
from mercurial.utils import (
    procutil,
)

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

def binopen(path, mode='rb'):
    if 'b' not in mode:
        mode = mode + 'b'
    return open(path, mode)

for f in sys.argv[1:]:
    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-")