Mercurial > hg
view contrib/undumprevlog @ 47682:78f7f0d490ee
dirstate-v2: Move fixed-size tree metadata into the docket file
Before this changeset, the dirstate-v2 data file contained not only nodes
and paths that may be reused when appending to an existing file,
but also some fixed-size metadata that applies to the entire tree
and was added at the end of the data file for every append.
This moves that metadata into the docket file, so that repeated "append"
operations without meaningful changes don’t actually need to grow any file.
Differential Revision: https://phab.mercurial-scm.org/D11098
author | Simon Sapin <simon.sapin@octobus.net> |
---|---|
date | Thu, 15 Jul 2021 23:02:17 +0200 |
parents | 8d3c2f9d4af7 |
children | 6000f5b25c9b |
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#!/usr/bin/env python3 # Undump a dump from dumprevlog # $ hg init # $ undumprevlog < repo.dump from __future__ import absolute_import, print_function import sys from mercurial.node import bin from mercurial import ( encoding, revlog, transaction, vfs as vfsmod, ) from mercurial.utils import procutil from mercurial.revlogutils import ( constants as revlog_constants, ) for fp in (sys.stdin, sys.stdout, sys.stderr): procutil.setbinary(fp) opener = vfsmod.vfs(b'.', False) tr = transaction.transaction( sys.stderr.write, opener, {b'store': opener}, b"undump.journal" ) while True: l = sys.stdin.readline() if not l: break if l.startswith("file:"): f = encoding.strtolocal(l[6:-1]) assert f.endswith(b'.i') r = revlog.revlog( opener, target=(revlog_constants.KIND_OTHER, b'undump-revlog'), radix=f[:-2], ) procutil.stdout.write(b'%s\n' % f) elif l.startswith("node:"): n = bin(l[6:-1]) elif l.startswith("linkrev:"): lr = int(l[9:-1]) elif l.startswith("parents:"): p = l[9:-1].split() p1 = bin(p[0]) p2 = bin(p[1]) elif l.startswith("length:"): length = int(l[8:-1]) sys.stdin.readline() # start marker d = encoding.strtolocal(sys.stdin.read(length)) sys.stdin.readline() # end marker r.addrevision(d, tr, lr, p1, p2) tr.close()