Mercurial > hg
view tests/test-revlog-v2.t @ 48295:bf11ff22a9af
dirstate-v2: freeze the on-disk format
It seems the format as reached a good balance. With a core of new capabilities
that motivated it initially and enough new feature and room for future
improvement to be a clear progress we can set a milestone for.
Having the format frozen will help the feature to get real life testing, outside
of the test suite.
The feature itself stay experimental but the config gains a new name to avoid
people enable non-frozen version by default.
If too many bugs are reported during the RC we might move the format back to
experimental and drop its support in future version (in favor of a new one)
Differential Revision: https://phab.mercurial-scm.org/D11709
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Wed, 20 Oct 2021 00:57:02 +0200 |
parents | 9cecc222c536 |
children | f35529784079 |
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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 new-repo $ cd new-repo $ cat .hg/requires dotencode exp-rc-dirstate-v2 (dirstate-v2 !) exp-revlogv2.2 fncache generaldelta persistent-nodemap (rust !) revlog-compression-zstd (zstd !) sparserevlog store $ hg log Unknown flags to revlog are rejected >>> with open('.hg/store/00changelog.i', 'wb') as fh: ... fh.write(b'\xff\x00\xde\xad') and None $ hg log abort: unknown flags (0xff00) in version 57005 revlog 00changelog [50] $ 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 00 de ad |....| $ f --hexdump --bytes 4 .hg/store/data/foo.i .hg/store/data/foo.i: 0000: 00 00 de ad |....| Bundle use a compatible changegroup format ------------------------------------------ $ hg bundle --all ../basic.hg 1 changesets found $ hg debugbundle --spec ../basic.hg bzip2-v2 The expected files are generated -------------------------------- We should have have: - a docket - a index file with a unique name - a data file $ ls .hg/store/00changelog* .hg/store/00manifest* .hg/store/00changelog-1335303a.sda .hg/store/00changelog-6b8ab34b.idx .hg/store/00changelog-b875dfc5.dat .hg/store/00changelog.i .hg/store/00manifest-05a21d65.idx .hg/store/00manifest-43c37dde.dat .hg/store/00manifest-e2c9362a.sda .hg/store/00manifest.i Local clone works ----------------- $ hg clone . ../cloned-repo updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg tip | tee ../tip-new changeset: 0:96ee1d7354c4 tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: initial $ hg tip -R ../cloned-repo | tee ../tip-cloned changeset: 0:96ee1d7354c4 tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: initial The two repository should be identical, this diff MUST be empty $ cmp ../tip-new ../tip-cloned || diff -U8 ../tip-new ../tip-cloned hg verify should be happy ------------------------- $ hg verify checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 1 changesets with 1 changes to 1 files $ hg verify -R ../cloned-repo checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 1 changesets with 1 changes to 1 files