upstream/mercurial-mirror Files · tests/test-revlog-v2.t

exchange: move disabling of rev-branch-cache bundle part out of narrow...

exchange: move disabling of rev-branch-cache bundle part out of narrow I'm attempting to refactor changegroup code in order to better support alternate storage backends. The narrow extension is performing a lot of monkeypatching to this code and it is making it difficult to reason about how everything works. I'm reasonably certain I would be unable to abstract storage without requiring extensive rework of narrow. I believe it is less effort to move narrow code into core so it can be accounted for when changegroup code is refactored. So I'll be doing that. The first part of this is integrating the disabling of the cache:rev-branch-cache bundle2 part into core. This doesn't seem like it is related to changegroup, but narrow's modifications to changegroup are invasive and also require taking its code for bundle generation and exchange into core in order for the changegroup code to work. Differential Revision: https://phab.mercurial-scm.org/D4007

Pulkit Goyal - - Load All Authors

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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-revlogv2.0

        fncache

        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 (changelog always disables generaldelta)

        $ 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 03 de ad                                     |....|

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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-revlogv2.0
				fncache
				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 (changelog always disables generaldelta)

				$ 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 03 de ad \|....\|