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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

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test-status-rev.t
158 lines | 6.2 KiB | text/troff | Tads3Lexer
Tests of 'hg status --rev <rev>' to make sure status between <rev> and '.' get
combined correctly with the dirstate status.
$ hg init
First commit
$ $PYTHON $TESTDIR/generate-working-copy-states.py state 2 1
$ hg addremove --similarity 0
adding content1_content1_content1-tracked
adding content1_content1_content1-untracked
adding content1_content1_content3-tracked
adding content1_content1_content3-untracked
adding content1_content1_missing-tracked
adding content1_content1_missing-untracked
adding content1_content2_content1-tracked
adding content1_content2_content1-untracked
adding content1_content2_content2-tracked
adding content1_content2_content2-untracked
adding content1_content2_content3-tracked
adding content1_content2_content3-untracked
adding content1_content2_missing-tracked
adding content1_content2_missing-untracked
adding content1_missing_content1-tracked
adding content1_missing_content1-untracked
adding content1_missing_content3-tracked
adding content1_missing_content3-untracked
adding content1_missing_missing-tracked
adding content1_missing_missing-untracked
$ hg commit -m first
Second commit
$ $PYTHON $TESTDIR/generate-working-copy-states.py state 2 2
$ hg addremove --similarity 0
removing content1_missing_content1-tracked
removing content1_missing_content1-untracked
removing content1_missing_content3-tracked
removing content1_missing_content3-untracked
removing content1_missing_missing-tracked
removing content1_missing_missing-untracked
adding missing_content2_content2-tracked
adding missing_content2_content2-untracked
adding missing_content2_content3-tracked
adding missing_content2_content3-untracked
adding missing_content2_missing-tracked
adding missing_content2_missing-untracked
$ hg commit -m second
Working copy
$ $PYTHON $TESTDIR/generate-working-copy-states.py state 2 wc
$ hg addremove --similarity 0
adding content1_missing_content1-tracked
adding content1_missing_content1-untracked
adding content1_missing_content3-tracked
adding content1_missing_content3-untracked
adding content1_missing_missing-tracked
adding content1_missing_missing-untracked
adding missing_missing_content3-tracked
adding missing_missing_content3-untracked
adding missing_missing_missing-tracked
adding missing_missing_missing-untracked
$ hg forget *_*_*-untracked
$ rm *_*_missing-*
Status compared to parent of the working copy, i.e. the dirstate status
$ hg status -A --rev 1 'glob:missing_content2_content3-tracked'
M missing_content2_content3-tracked
$ hg status -A --rev 1 'glob:missing_content2_content2-tracked'
C missing_content2_content2-tracked
$ hg status -A --rev 1 'glob:missing_missing_content3-tracked'
A missing_missing_content3-tracked
$ hg status -A --rev 1 'glob:missing_missing_content3-untracked'
? missing_missing_content3-untracked
$ hg status -A --rev 1 'glob:missing_content2_*-untracked'
R missing_content2_content2-untracked
R missing_content2_content3-untracked
R missing_content2_missing-untracked
$ hg status -A --rev 1 'glob:missing_*_missing-tracked'
! missing_content2_missing-tracked
! missing_missing_missing-tracked
$ hg status -A --rev 1 'glob:missing_missing_missing-untracked'
missing_missing_missing-untracked: $ENOENT$
Status between first and second commit. Should ignore dirstate status.
$ hg status -A --rev 0:1 'glob:content1_content2_*'
M content1_content2_content1-tracked
M content1_content2_content1-untracked
M content1_content2_content2-tracked
M content1_content2_content2-untracked
M content1_content2_content3-tracked
M content1_content2_content3-untracked
M content1_content2_missing-tracked
M content1_content2_missing-untracked
$ hg status -A --rev 0:1 'glob:content1_content1_*'
C content1_content1_content1-tracked
C content1_content1_content1-untracked
C content1_content1_content3-tracked
C content1_content1_content3-untracked
C content1_content1_missing-tracked
C content1_content1_missing-untracked
$ hg status -A --rev 0:1 'glob:missing_content2_*'
A missing_content2_content2-tracked
A missing_content2_content2-untracked
A missing_content2_content3-tracked
A missing_content2_content3-untracked
A missing_content2_missing-tracked
A missing_content2_missing-untracked
$ hg status -A --rev 0:1 'glob:content1_missing_*'
R content1_missing_content1-tracked
R content1_missing_content1-untracked
R content1_missing_content3-tracked
R content1_missing_content3-untracked
R content1_missing_missing-tracked
R content1_missing_missing-untracked
$ hg status -A --rev 0:1 'glob:missing_missing_*'
Status compared to one revision back, checking that the dirstate status
is correctly combined with the inter-revision status
$ hg status -A --rev 0 'glob:content1_*_content[23]-tracked'
M content1_content1_content3-tracked
M content1_content2_content2-tracked
M content1_content2_content3-tracked
M content1_missing_content3-tracked
$ hg status -A --rev 0 'glob:content1_*_content1-tracked'
C content1_content1_content1-tracked
C content1_content2_content1-tracked
C content1_missing_content1-tracked
$ hg status -A --rev 0 'glob:missing_*_content?-tracked'
A missing_content2_content2-tracked
A missing_content2_content3-tracked
A missing_missing_content3-tracked
BROKEN: missing_content2_content[23]-untracked exist, so should be listed
$ hg status -A --rev 0 'glob:missing_*_content?-untracked'
? missing_missing_content3-untracked
$ hg status -A --rev 0 'glob:content1_*_*-untracked'
R content1_content1_content1-untracked
R content1_content1_content3-untracked
R content1_content1_missing-untracked
R content1_content2_content1-untracked
R content1_content2_content2-untracked
R content1_content2_content3-untracked
R content1_content2_missing-untracked
R content1_missing_content1-untracked
R content1_missing_content3-untracked
R content1_missing_missing-untracked
$ hg status -A --rev 0 'glob:*_*_missing-tracked'
! content1_content1_missing-tracked
! content1_content2_missing-tracked
! content1_missing_missing-tracked
! missing_content2_missing-tracked
! missing_missing_missing-tracked
$ hg status -A --rev 0 'glob:missing_*_missing-untracked'