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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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test-push-checkheads-superceed-A3.t
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Pierre-Yves David
obsolescence: add test for the "branch replacement" logic during push, case A3...
 r31976 ====================================
Testing head checking code: Case A-3
====================================
Mercurial checks for the introduction of new heads on push. Evolution comes
into play to detect if existing branches on the server are being replaced by
some of the new one we push.
This case is part of a series of tests checking this behavior.
Category A: simple case involving a branch being superceeded by another.
TestCase 3: multi-changeset branch with reordering
Push should be allowed
.. old-state:
..
.. * 2 changeset branch
..
.. new-state:
..
.. * 2 changeset branch succeeding the old one with reordering
..
.. expected-result:
..
.. * push allowed
..
.. graph-summary:
..
.. B ø⇠⇠
.. | ⇡
.. A ø⇠⇠⇠○ A'
.. | ⇡/
.. | ○ B'
.. |/
.. ●
$ . $TESTDIR/testlib/push-checkheads-util.sh
Test setup
----------
$ mkdir A3
$ cd A3
$ setuprepos
creating basic server and client repo
updating to branch default
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd server
$ mkcommit B0
$ cd ../client
$ hg pull
Matt Harbison
tests: remove (glob) annotations that were only for '\' matches...
 r35394 pulling from $TESTTMP/A3/server
Pierre-Yves David
obsolescence: add test for the "branch replacement" logic during push, case A3...
 r31976 searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
Boris Feld
phase: report number of non-public changeset alongside the new range...
 r39516 new changesets d73caddc5533 (1 drafts)
Pierre-Yves David
obsolescence: add test for the "branch replacement" logic during push, case A3...
 r31976 (run 'hg update' to get a working copy)
$ hg up 0
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ mkcommit B1
created new head
$ mkcommit A1
$ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
Boris Feld
debugobsolete: also report the number of obsoleted changesets...
 r33542 obsoleted 1 changesets
Martin von Zweigbergk
evolution: report new unstable changesets...
 r35727 1 new orphan changesets
Pierre-Yves David
obsolescence: add test for the "branch replacement" logic during push, case A3...
 r31976 $ hg debugobsolete `getid "desc(B0)" ` `getid "desc(B1)"`
Boris Feld
debugobsolete: also report the number of obsoleted changesets...
 r33542 obsoleted 1 changesets
Pierre-Yves David
obsolescence: add test for the "branch replacement" logic during push, case A3...
 r31976 $ hg log -G --hidden
@ c1c7524e9488 (draft): A1
|
o 25c56d33e4c4 (draft): B1
|
| x d73caddc5533 (draft): B0
| |
| x 8aaa48160adc (draft): A0
|/
o 1e4be0697311 (public): root
Actual testing
--------------
$ hg push
Matt Harbison
tests: remove (glob) annotations that were only for '\' matches...
 r35394 pushing to $TESTTMP/A3/server
Pierre-Yves David
obsolescence: add test for the "branch replacement" logic during push, case A3...
 r31976 searching for changes
adding changesets
adding manifests
adding file changes
added 2 changesets with 2 changes to 2 files (+1 heads)
2 new obsolescence markers
marmoute
obsolete: reports the number of local changeset obsoleted when unbundling...
 r33249 obsoleted 2 changesets
Pierre-Yves David
obsolescence: add test for the "branch replacement" logic during push, case A3...
 r31976
$ cd ../..