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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
Yuya Nishihara - - Load All Authors

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test-convert-svn-encoding.t
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#require svn svn-bindings
$ cat >> $HGRCPATH <<EOF
> [extensions]
> convert =
> EOF
$ svnadmin create svn-repo
$ svnadmin load -q svn-repo < "$TESTDIR/svn/encoding.svndump"
Convert while testing all possible outputs
$ hg --debug convert svn-repo A-hg --config progress.debug=1
initializing destination A-hg repository
reparent to file:/*/$TESTTMP/svn-repo (glob)
run hg sink pre-conversion action
scanning source...
found trunk at 'trunk'
found tags at 'tags'
found branches at 'branches'
found branch branch\xc3\xa9 at 5 (esc)
found branch branch\xc3\xa9e at 6 (esc)
scanning: 1/4 revisions (25.00%)
reparent to file:/*/$TESTTMP/svn-repo/trunk (glob)
fetching revision log for "/trunk" from 4 to 0
parsing revision 4 (2 changes)
parsing revision 3 (4 changes)
parsing revision 2 (3 changes)
parsing revision 1 (3 changes)
no copyfrom path, don't know what to do.
'/branches' is not under '/trunk', ignoring
'/tags' is not under '/trunk', ignoring
scanning: 2/4 revisions (50.00%)
reparent to file:/*/$TESTTMP/svn-repo/branches/branch%C3%A9 (glob)
fetching revision log for "/branches/branch\xc3\xa9" from 5 to 0 (esc)
parsing revision 5 (1 changes)
reparent to file:/*/$TESTTMP/svn-repo (glob)
reparent to file:/*/$TESTTMP/svn-repo/branches/branch%C3%A9 (glob)
found parent of branch /branches/branch\xc3\xa9 at 4: /trunk (esc)
scanning: 3/4 revisions (75.00%)
reparent to file:/*/$TESTTMP/svn-repo/branches/branch%C3%A9e (glob)
fetching revision log for "/branches/branch\xc3\xa9e" from 6 to 0 (esc)
parsing revision 6 (1 changes)
reparent to file:/*/$TESTTMP/svn-repo (glob)
reparent to file:/*/$TESTTMP/svn-repo/branches/branch%C3%A9e (glob)
found parent of branch /branches/branch\xc3\xa9e at 5: /branches/branch\xc3\xa9 (esc)
scanning: 4/4 revisions (100.00%)
scanning: 5/4 revisions (125.00%)
scanning: 6/4 revisions (150.00%)
sorting...
converting...
5 init projA
source: svn:afeb9c47-92ff-4c0c-9f72-e1f6eb8ac9af/trunk@1
converting: 0/6 revisions (0.00%)
reusing manifest from p1 (no file change)
committing changelog
updating the branch cache
4 hello
source: svn:afeb9c47-92ff-4c0c-9f72-e1f6eb8ac9af/trunk@2
converting: 1/6 revisions (16.67%)
reparent to file:/*/$TESTTMP/svn-repo/trunk (glob)
scanning paths: /trunk/\xc3\xa0 0/3 paths (0.00%) (esc)
scanning paths: /trunk/\xc3\xa0/e\xcc\x81 1/3 paths (33.33%) (esc)
scanning paths: /trunk/\xc3\xa9 2/3 paths (66.67%) (esc)
committing files:
\xc3\xa0/e\xcc\x81 (esc)
getting files: \xc3\xa0/e\xcc\x81 1/2 files (50.00%) (esc)
\xc3\xa9 (esc)
getting files: \xc3\xa9 2/2 files (100.00%) (esc)
committing manifest
committing changelog
updating the branch cache
3 copy files
source: svn:afeb9c47-92ff-4c0c-9f72-e1f6eb8ac9af/trunk@3
converting: 2/6 revisions (33.33%)
scanning paths: /trunk/\xc3\xa0 0/4 paths (0.00%) (esc)
gone from -1
reparent to file:/*/$TESTTMP/svn-repo (glob)
reparent to file:/*/$TESTTMP/svn-repo/trunk (glob)
scanning paths: /trunk/\xc3\xa8 1/4 paths (25.00%) (esc)
copied to \xc3\xa8 from \xc3\xa9@2 (esc)
scanning paths: /trunk/\xc3\xa9 2/4 paths (50.00%) (esc)
gone from -1
reparent to file:/*/$TESTTMP/svn-repo (glob)
reparent to file:/*/$TESTTMP/svn-repo/trunk (glob)
scanning paths: /trunk/\xc3\xb9 3/4 paths (75.00%) (esc)
mark /trunk/\xc3\xb9 came from \xc3\xa0:2 (esc)
getting files: \xc3\xa0/e\xcc\x81 1/4 files (25.00%) (esc)
getting files: \xc3\xa9 2/4 files (50.00%) (esc)
committing files:
\xc3\xa8 (esc)
getting files: \xc3\xa8 3/4 files (75.00%) (esc)
\xc3\xa8: copy \xc3\xa9:6b67ccefd5ce6de77e7ead4f5292843a0255329f (esc)
\xc3\xb9/e\xcc\x81 (esc)
getting files: \xc3\xb9/e\xcc\x81 4/4 files (100.00%) (esc)
\xc3\xb9/e\xcc\x81: copy \xc3\xa0/e\xcc\x81:a9092a3d84a37b9993b5c73576f6de29b7ea50f6 (esc)
committing manifest
committing changelog
updating the branch cache
2 remove files
source: svn:afeb9c47-92ff-4c0c-9f72-e1f6eb8ac9af/trunk@4
converting: 3/6 revisions (50.00%)
scanning paths: /trunk/\xc3\xa8 0/2 paths (0.00%) (esc)
gone from -1
reparent to file:/*/$TESTTMP/svn-repo (glob)
reparent to file:/*/$TESTTMP/svn-repo/trunk (glob)
scanning paths: /trunk/\xc3\xb9 1/2 paths (50.00%) (esc)
gone from -1
reparent to file:/*/$TESTTMP/svn-repo (glob)
reparent to file:/*/$TESTTMP/svn-repo/trunk (glob)
getting files: \xc3\xa8 1/2 files (50.00%) (esc)
getting files: \xc3\xb9/e\xcc\x81 2/2 files (100.00%) (esc)
committing files:
committing manifest
committing changelog
updating the branch cache
1 branch to branch?
source: svn:afeb9c47-92ff-4c0c-9f72-e1f6eb8ac9af/branches/branch?@5
converting: 4/6 revisions (66.67%)
reparent to file:/*/$TESTTMP/svn-repo/branches/branch%C3%A9 (glob)
scanning paths: /branches/branch\xc3\xa9 0/1 paths (0.00%) (esc)
reusing manifest from p1 (no file change)
committing changelog
updating the branch cache
0 branch to branch?e
source: svn:afeb9c47-92ff-4c0c-9f72-e1f6eb8ac9af/branches/branch?e@6
converting: 5/6 revisions (83.33%)
reparent to file:/*/$TESTTMP/svn-repo/branches/branch%C3%A9e (glob)
scanning paths: /branches/branch\xc3\xa9e 0/1 paths (0.00%) (esc)
reusing manifest from p1 (no file change)
committing changelog
updating the branch cache
reparent to file:/*/$TESTTMP/svn-repo (glob)
reparent to file:/*/$TESTTMP/svn-repo/branches/branch%C3%A9e (glob)
reparent to file:/*/$TESTTMP/svn-repo (glob)
reparent to file:/*/$TESTTMP/svn-repo/branches/branch%C3%A9e (glob)
updating tags
committing files:
.hgtags
committing manifest
committing changelog
updating the branch cache
run hg sink post-conversion action
$ cd A-hg
$ hg up
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
Check tags are in UTF-8
$ cat .hgtags
e94e4422020e715add80525e8f0f46c9968689f1 branch\xc3\xa9e (esc)
f7e66f98380ed1e53a797c5c7a7a2616a7ab377d branch\xc3\xa9 (esc)
$ cd ..