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

copies: add config option for writing copy metadata to file and/or changset...

copies: add config option for writing copy metadata to file and/or changset This introduces a config option that lets you choose to write copy metadata to the changeset extras instead of to filelog. There's also an option to write it to both places. I imagine that may possibly be useful when transitioning an existing repo. The copy metadata is stored as two fields in extras: one for copies since p1 and one for copies since p2. I may need to add more information later in order to make copy tracing faster. Specifically, I'm thinking out recording which files were added or removed so that copies._chaincopies() doesn't have to look at the manifest for that. But that would just be an optimization and that can be added once we know if it's necessary. I have also considered saving space by using replacing the destination file path by an index into the "files" list, but that can also be changed later (but before the feature is ready to release). Differential Revision: https://phab.mercurial-scm.org/D6183

Gregory Szorc - - 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-revlogv2.1

        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                                     |....|

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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 \|....\|