contrib/dumprevlog

keyword: make kwdemo less verbose

1) Set the branchname always silently with
   dirstate.setbranch().
   We create a branch so that testing the {branches} template
   does not come up empty. But kwdemo is hardly the place to
   inform the user by inference why {branches} is empty on the
   default branch.
   "demobranch" is ascii and cannot be changed, so using the
   internal command instead of commands.branch() is safe.
2) Do not show full path to temporary directory
   (distracting long lines on Mac OS X).
3) No special debug output. Output only related to keyword,
   no internals like unsetting of commit hooks etc.

#!/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.set_binary(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-"