upstream/mercurial-mirror Files · tests/test-manifest.t

wireprotov2: define and implement "manifestdata" command...

wireprotov2: define and implement "manifestdata" command The added command can be used for obtaining manifest data. Given a manifest path and set of manifest nodes, data about manifests can be retrieved. Unlike changeset data, we wish to emit deltas to describe manifest revisions. So the command uses the relatively new API for building delta requests and emitting them. The code calls into deltaparent(), which I'm not very keen of. There's still work to be done in delta generation land so implementation details of storage (e.g. exactly one delta is stored/available) don't creep into higher levels. But we can worry about this later (there is already a TODO on imanifestorage tracking this). On the subject of parent deltas, the server assumes parent revisions exist on the receiving end. This is obviously wrong for shallow clone. I've added TODOs to add a mechanism to the command to allow clients to specify desired behavior. This shouldn't be too difficult to implement. Another big change is that the client must explicitly request manifest nodes to retrieve. This is a major departure from "getbundle," where the server derives relevant manifests as it iterates changesets and sends them automatically. As implemented, the client must transmit each requested node to the server. At 20 bytes per node, we're looking at 2 MB per 100,000 nodes. Plus wire encoding overhead. This isn't ideal for clients with limited upload bandwidth. I plan to address this in the future by allowing alternate mechanisms for defining the revisions to retrieve. One idea is to define a range of changeset revisions whose manifest revisions to retrieve (similar to how "changesetdata" works). We almost certainly want an API to look up an individual manifest by node. And that's where I've chosen to start with the implementation. Again, a theme of this early exchangev2 work is I want to start by building primitives for accessing raw repository data first and see how far we can get with those before we need more complexity. Differential Revision: https://phab.mercurial-scm.org/D4488

Boris Feld - - Load All Authors

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      Source bundle was generated with the following script:

      # hg init

      # echo a > a

      # ln -s a l

      # hg ci -Ama -d'0 0'

      # mkdir b

      # echo a > b/a

      # chmod +x b/a

      # hg ci -Amb -d'1 0'

        $ hg init

        $ hg unbundle "$TESTDIR/bundles/test-manifest.hg"

        adding changesets

        adding manifests

        adding file changes

        added 2 changesets with 3 changes to 3 files

        new changesets b73562a03cfe:5bdc995175ba (2 drafts)

        (run 'hg update' to get a working copy)

      The next call is expected to return nothing:

        $ hg manifest

        $ hg co

        3 files updated, 0 files merged, 0 files removed, 0 files unresolved

        $ hg manifest

        a

        b/a

        l

        $ hg files -vr .

                 2   a

                 2 x b/a

                 1 l l

        $ hg files -r . -X b

        a

        l

        $ hg files -T '{path} {size} {flags}\n'

        a 2 

        b/a 2 x

        l 1 l

        $ hg files -T '{path} {node|shortest}\n' -r.

        a 5bdc

        b/a 5bdc

        l 5bdc

        $ hg manifest -v

        644   a

        755 * b/a

        644 @ l

        $ hg manifest -T '{path} {rev}\n'

        a 1

        b/a 1

        l 1

        $ hg manifest --debug

        b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3 644   a

        b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3 755 * b/a

        047b75c6d7a3ef6a2243bd0e99f94f6ea6683597 644 @ l

        $ hg manifest -r 0

        a

        l

        $ hg manifest -r 1

        a

        b/a

        l

        $ hg manifest -r tip

        a

        b/a

        l

        $ hg manifest tip

        a

        b/a

        l

        $ hg manifest --all

        a

        b/a

        l

      The next two calls are expected to abort:

        $ hg manifest -r 2

        abort: unknown revision '2'!

        [255]

        $ hg manifest -r tip tip

        abort: please specify just one revision

        [255]

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t s	Toggle sidebar on some pages

				Source bundle was generated with the following script:

				# hg init
				# echo a > a
				# ln -s a l
				# hg ci -Ama -d'0 0'
				# mkdir b
				# echo a > b/a
				# chmod +x b/a
				# hg ci -Amb -d'1 0'

				$ hg init
				$ hg unbundle "$TESTDIR/bundles/test-manifest.hg"
				adding changesets
				adding manifests
				adding file changes
				added 2 changesets with 3 changes to 3 files
				new changesets b73562a03cfe:5bdc995175ba (2 drafts)
				(run 'hg update' to get a working copy)

				The next call is expected to return nothing:

				$ hg manifest

				$ hg co
				3 files updated, 0 files merged, 0 files removed, 0 files unresolved

				$ hg manifest
				a
				b/a
				l

				$ hg files -vr .
				2 a
				2 x b/a
				1 l l
				$ hg files -r . -X b
				a
				l
				$ hg files -T '{path} {size} {flags}\n'
				a 2
				b/a 2 x
				l 1 l
				$ hg files -T '{path} {node\|shortest}\n' -r.
				a 5bdc
				b/a 5bdc
				l 5bdc

				$ hg manifest -v
				644 a
				755 * b/a
				644 @ l
				$ hg manifest -T '{path} {rev}\n'
				a 1
				b/a 1
				l 1

				$ hg manifest --debug
				b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3 644 a
				b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3 755 * b/a
				047b75c6d7a3ef6a2243bd0e99f94f6ea6683597 644 @ l

				$ hg manifest -r 0
				a
				l

				$ hg manifest -r 1
				a
				b/a
				l

				$ hg manifest -r tip
				a
				b/a
				l

				$ hg manifest tip
				a
				b/a
				l

				$ hg manifest --all
				a
				b/a
				l

				The next two calls are expected to abort:

				$ hg manifest -r 2
				abort: unknown revision '2'!
				[255]

				$ hg manifest -r tip tip
				abort: please specify just one revision
				[255]