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

internals: extract frame-based protocol docs to own document...

internals: extract frame-based protocol docs to own document wireprotocol.txt is quite long and difficult to digest. The frame-based protocol is effectively a standalone concept (and could even be used outside of Mercurial). So this commit extracts its docs to a standalone file. The first few paragraphs were rewritten as part of the extraction. Sections headers were adjusted accordingly. Existing referalls in wireprotocol.txt were updated to refer to the new doc / concept, which I've started referring to as `hgrpc`. I'm on the fence as to whether to move the HTTP and SSH transport details to the new doc as well. For now, I'm leaving them in wireprotocol.txt. Differential Revision: https://phab.mercurial-scm.org/D4443

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 \|....\|