Mercurial > hg
view tests/test-revlog-v2.t @ 44311:2b72c4ff8ed1
nodemap: use an intermediate "docket" file to carry small metadata
This intermediate file will make mmapping, transaction and content validation
easier. (Most of this usefulness will arrive gradually in later changeset). In
particular it will become very useful to append new data are the end of raw file
instead of rewriting on the file on each transaction.
See in code comments for details.
Differential Revision: https://phab.mercurial-scm.org/D7838
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Wed, 15 Jan 2020 15:47:50 +0100 |
parents | e7a2cc84dbc0 |
children | 15d35f2ba474 |
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#require reporevlogstore A repo with unknown revlogv2 requirement string cannot be opened $ hg init invalidreq $ cd invalidreq $ echo exp-revlogv2.unknown >> .hg/requires $ hg log abort: repository requires features unknown to this Mercurial: exp-revlogv2.unknown! (see https://mercurial-scm.org/wiki/MissingRequirement for more information) [255] $ cd .. Can create and open repo with revlog v2 requirement $ cat >> $HGRCPATH << EOF > [experimental] > revlogv2 = enable-unstable-format-and-corrupt-my-data > EOF $ hg init empty-repo $ cd empty-repo $ cat .hg/requires dotencode exp-revlogv2.1 fncache sparserevlog store $ hg log Unknown flags to revlog are rejected >>> with open('.hg/store/00changelog.i', 'wb') as fh: ... fh.write(b'\x00\x04\xde\xad') and None $ hg log abort: unknown flags (0x04) in version 57005 revlog 00changelog.i! [255] $ cd .. Writing a simple revlog v2 works $ hg init simple $ cd simple $ touch foo $ hg -q commit -A -m initial $ hg log changeset: 0:96ee1d7354c4 tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: initial Header written as expected $ f --hexdump --bytes 4 .hg/store/00changelog.i .hg/store/00changelog.i: 0000: 00 01 de ad |....| $ f --hexdump --bytes 4 .hg/store/data/foo.i .hg/store/data/foo.i: 0000: 00 01 de ad |....|