upstream/mercurial-mirror Files · tests/test-repo-compengines.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

Gregory Szorc - - Load All Authors

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      A new repository uses zlib storage, which doesn't need a requirement

        $ hg init default

        $ cd default

        $ cat .hg/requires

        dotencode

        fncache

        generaldelta

        revlogv1

        store

        testonly-simplestore (reposimplestore !)

        $ touch foo

        $ hg -q commit -A -m 'initial commit with a lot of repeated repeated repeated text to trigger compression'

        $ hg debugrevlog -c | grep 0x78

            0x78 (x)  :   1 (100.00%)

            0x78 (x)  : 110 (100.00%)

        $ cd ..

      Unknown compression engine to format.compression aborts

        $ hg --config experimental.format.compression=unknown init unknown

        abort: compression engine unknown defined by experimental.format.compression not available

        (run "hg debuginstall" to list available compression engines)

        [255]

      A requirement specifying an unknown compression engine results in bail

        $ hg init unknownrequirement

        $ cd unknownrequirement

        $ echo exp-compression-unknown >> .hg/requires

        $ hg log

        abort: repository requires features unknown to this Mercurial: exp-compression-unknown!

        (see https://mercurial-scm.org/wiki/MissingRequirement for more information)

        [255]

        $ cd ..

      #if zstd

        $ hg --config experimental.format.compression=zstd init zstd

        $ cd zstd

        $ cat .hg/requires

        dotencode

        exp-compression-zstd

        fncache

        generaldelta

        revlogv1

        store

        testonly-simplestore (reposimplestore !)

        $ touch foo

        $ hg -q commit -A -m 'initial commit with a lot of repeated repeated repeated text'

        $ hg debugrevlog -c | grep 0x28

            0x28      :  1 (100.00%)

            0x28      : 98 (100.00%)

        $ cd ..

      Specifying a new format.compression on an existing repo won't introduce data

      with that engine or a requirement

        $ cd default

        $ touch bar

        $ hg --config experimental.format.compression=zstd -q commit -A -m 'add bar with a lot of repeated repeated repeated text'

        $ cat .hg/requires

        dotencode

        fncache

        generaldelta

        revlogv1

        store

        testonly-simplestore (reposimplestore !)

        $ hg debugrevlog -c | grep 0x78

            0x78 (x)  :   2 (100.00%)

            0x78 (x)  : 199 (100.00%)

      #endif

	Site-wide shortcuts
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				A new repository uses zlib storage, which doesn't need a requirement

				$ hg init default
				$ cd default
				$ cat .hg/requires
				dotencode
				fncache
				generaldelta
				revlogv1
				store
				testonly-simplestore (reposimplestore !)

				$ touch foo
				$ hg -q commit -A -m 'initial commit with a lot of repeated repeated repeated text to trigger compression'
				$ hg debugrevlog -c \| grep 0x78
				0x78 (x) : 1 (100.00%)
				0x78 (x) : 110 (100.00%)

				$ cd ..

				Unknown compression engine to format.compression aborts

				$ hg --config experimental.format.compression=unknown init unknown
				abort: compression engine unknown defined by experimental.format.compression not available
				(run "hg debuginstall" to list available compression engines)
				[255]

				A requirement specifying an unknown compression engine results in bail

				$ hg init unknownrequirement
				$ cd unknownrequirement
				$ echo exp-compression-unknown >> .hg/requires
				$ hg log
				abort: repository requires features unknown to this Mercurial: exp-compression-unknown!
				(see https://mercurial-scm.org/wiki/MissingRequirement for more information)
				[255]

				$ cd ..

				#if zstd

				$ hg --config experimental.format.compression=zstd init zstd
				$ cd zstd
				$ cat .hg/requires
				dotencode
				exp-compression-zstd
				fncache
				generaldelta
				revlogv1
				store
				testonly-simplestore (reposimplestore !)

				$ touch foo
				$ hg -q commit -A -m 'initial commit with a lot of repeated repeated repeated text'

				$ hg debugrevlog -c \| grep 0x28
				0x28 : 1 (100.00%)
				0x28 : 98 (100.00%)

				$ cd ..

				Specifying a new format.compression on an existing repo won't introduce data
				with that engine or a requirement

				$ cd default
				$ touch bar
				$ hg --config experimental.format.compression=zstd -q commit -A -m 'add bar with a lot of repeated repeated repeated text'

				$ cat .hg/requires
				dotencode
				fncache
				generaldelta
				revlogv1
				store
				testonly-simplestore (reposimplestore !)

				$ hg debugrevlog -c \| grep 0x78
				0x78 (x) : 2 (100.00%)
				0x78 (x) : 199 (100.00%)

				#endif