contrib/dumprevlog

test-merge-tools: stabilize for Windows

This masks the Windows argument parsing insanity[1], so it needs a bit of
explanation.  (The security reference in the footnote is probably useful to keep
in mind if we ever whitelist certain in-repo config settings.)

9037c29e9f53 introduced tests that were failing on Windows with an unbalanced
double quote[2].  What ends up happening here is util.shellquote() is double
quoting the file path, but the shell script is placing this ->": "<- right next
to it.  So cmd.exe gets launched with 'lb:base": ""c:\...\f~base.xyz"', which
got interpreted as 'lb:base: "c:\...\f~base.xyz'. If the test is adjusted to
quote like "lb:$labelbase: $base", then MSYS runs interference and strips the
'\' characters.  I was able to get the expected result by dropping the quotes
from '": "', and changing the space to underscore.  But since we need to glob
away the C: part anyway, just glob away the quote and leave the test unchanged.

[1] https://blogs.msdn.microsoft.com/twistylittlepassagesallalike/2011/04/23/everyone-quotes-command-line-arguments-the-wrong-way/
[2] https://buildbot.mercurial-scm.org/builders/Win7%20x86_64%20hg%20tests/builds/441/steps/run-tests.py%20%28python%202.7.13%29/logs/stdio

#!/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,
    util,
)

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