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view tests/test-logexchange.t @ 40393:229d23cdb203
exchangev2: support fetching shallow files history
This commit teaches the exchangev2 client code to handle fetching shallow
files data.
Only shallow fetching of files data is supported: shallow fetching of
changeset and manifest data is explicitly not yet supported.
Previously, we would fetch file revisions for changesets that were received
by the current pull operation. In the new model, we calculate the set of
"relevant" changesets given the pull depth and only fetch files data for
those changesets.
We also teach the "filesdata" command invocation to vary parameters as needed.
The implementation here is far from complete or optimal. Subsequent pulls will
end up re-fetching a lot of files data. But the application of this data should
mostly be a no-op on the client, so it isn't a big deal.
Depending on the order file revisions are fetched in, revisions could get
inserted with the wrong revision number relationships. I think the best way
to deal with this is to remove revision numbers from storage and to either
dynamically derive them (by reconstructing a DAG from nodes/parents) or remove
revision numbers from the file storage interface completely.
A missing API that we'll likely want to write pretty soon is "ensure files
for revision(s) are present." We can kind of cajole exchangev2.pull() to do
this. But it isn't very efficient. For example, in simple cases like
widening the store to obtain data for a single revision, it is probably
more efficient to walk the manifest and find exactly which file revisions
are missing and to make explicit requests for just their data. In more
advanced cases, asking the server for all files data may be more efficient,
even though it requires sending data the client already has. There is tons
of room for future experimentation here. And TBH I'm not sure what the
final state will be.
Anyway, this commit gets us pretty close to being able to have shallow
and narrow checkouts with exchangev2/sqlite storage. Close enough that a
minimal extension should be able to provide fill in the gaps until the code
in core stabilizes and there is a user-facing way to trigger the
narrow/shallow bits from `hg clone` without also implying using of the
narrow extension...
Differential Revision: https://phab.mercurial-scm.org/D5169
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Fri, 19 Oct 2018 12:30:49 +0200 |
parents | fd4d59cf2ebb |
children | d7304434390f |
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Testing the functionality to pull remotenames ============================================= $ cat >> $HGRCPATH << EOF > [ui] > ssh = "$PYTHON" "$TESTDIR/dummyssh" > [alias] > glog = log -G -T '{rev}:{node|short} {desc}' > [extensions] > remotenames = > show = > EOF Making a server repo -------------------- $ hg init server $ cd server $ for ch in a b c d e f g h; do > echo "foo" >> $ch > hg ci -Aqm "Added "$ch > done $ hg glog @ 7:ec2426147f0e Added h | o 6:87d6d6676308 Added g | o 5:825660c69f0c Added f | o 4:aa98ab95a928 Added e | o 3:62615734edd5 Added d | o 2:28ad74487de9 Added c | o 1:29becc82797a Added b | o 0:18d04c59bb5d Added a $ hg bookmark -r 3 foo $ hg bookmark -r 6 bar $ hg up 4 0 files updated, 0 files merged, 3 files removed, 0 files unresolved $ hg branch wat marked working directory as branch wat (branches are permanent and global, did you want a bookmark?) $ echo foo >> bar $ hg ci -Aqm "added bar" Making a client repo -------------------- $ cd .. $ hg clone ssh://user@dummy/server client requesting all changes adding changesets adding manifests adding file changes added 9 changesets with 9 changes to 9 files (+1 heads) new changesets 18d04c59bb5d:3e1487808078 updating to branch default 8 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd client $ cat .hg/logexchange/bookmarks 0 87d6d66763085b629e6d7ed56778c79827273022\x00default\x00bar (esc) 62615734edd52f06b6fb9c2beb429e4fe30d57b8\x00default\x00foo (esc) $ cat .hg/logexchange/branches 0 ec2426147f0e39dbc9cef599b066be6035ce691d\x00default\x00default (esc) 3e1487808078543b0af6d10dadf5d46943578db0\x00default\x00wat (esc) $ hg show work o 3e14 (wat) (default/wat) added bar ~ @ ec24 (default/default) Added h ~ $ hg update "default/wat" 1 files updated, 0 files merged, 3 files removed, 0 files unresolved $ hg identify 3e1487808078 (wat) tip Making a new server ------------------- $ cd .. $ hg init server2 $ cd server2 $ hg pull ../server/ pulling from ../server/ requesting all changes adding changesets adding manifests adding file changes added 9 changesets with 9 changes to 9 files (+1 heads) adding remote bookmark bar adding remote bookmark foo new changesets 18d04c59bb5d:3e1487808078 (run 'hg heads' to see heads) Pulling form the new server --------------------------- $ cd ../client/ $ hg pull ../server2/ pulling from ../server2/ searching for changes no changes found $ cat .hg/logexchange/bookmarks 0 62615734edd52f06b6fb9c2beb429e4fe30d57b8\x00default\x00foo (esc) 87d6d66763085b629e6d7ed56778c79827273022\x00default\x00bar (esc) 87d6d66763085b629e6d7ed56778c79827273022\x00$TESTTMP/server2\x00bar (esc) 62615734edd52f06b6fb9c2beb429e4fe30d57b8\x00$TESTTMP/server2\x00foo (esc) $ cat .hg/logexchange/branches 0 3e1487808078543b0af6d10dadf5d46943578db0\x00default\x00wat (esc) ec2426147f0e39dbc9cef599b066be6035ce691d\x00default\x00default (esc) ec2426147f0e39dbc9cef599b066be6035ce691d\x00$TESTTMP/server2\x00default (esc) 3e1487808078543b0af6d10dadf5d46943578db0\x00$TESTTMP/server2\x00wat (esc) $ hg log -G @ changeset: 8:3e1487808078 | branch: wat | tag: tip | remote branch: $TESTTMP/server2/wat | remote branch: default/wat | parent: 4:aa98ab95a928 | user: test | date: Thu Jan 01 00:00:00 1970 +0000 | summary: added bar | | o changeset: 7:ec2426147f0e | | remote branch: $TESTTMP/server2/default | | remote branch: default/default | | user: test | | date: Thu Jan 01 00:00:00 1970 +0000 | | summary: Added h | | | o changeset: 6:87d6d6676308 | | bookmark: bar | | remote bookmark: $TESTTMP/server2/bar | | remote bookmark: default/bar | | hoisted name: bar | | user: test | | date: Thu Jan 01 00:00:00 1970 +0000 | | summary: Added g | | | o changeset: 5:825660c69f0c |/ user: test | date: Thu Jan 01 00:00:00 1970 +0000 | summary: Added f | o changeset: 4:aa98ab95a928 | user: test | date: Thu Jan 01 00:00:00 1970 +0000 | summary: Added e | o changeset: 3:62615734edd5 | bookmark: foo | remote bookmark: $TESTTMP/server2/foo | remote bookmark: default/foo | hoisted name: foo | user: test | date: Thu Jan 01 00:00:00 1970 +0000 | summary: Added d | o changeset: 2:28ad74487de9 | user: test | date: Thu Jan 01 00:00:00 1970 +0000 | summary: Added c | o changeset: 1:29becc82797a | user: test | date: Thu Jan 01 00:00:00 1970 +0000 | summary: Added b | o changeset: 0:18d04c59bb5d user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Added a Testing the templates provided by remotenames extension `remotenames` keyword $ hg log -G -T "{rev}:{node|short} {remotenames}\n" @ 8:3e1487808078 $TESTTMP/server2/wat default/wat | | o 7:ec2426147f0e $TESTTMP/server2/default default/default | | | o 6:87d6d6676308 $TESTTMP/server2/bar default/bar | | | o 5:825660c69f0c |/ o 4:aa98ab95a928 | o 3:62615734edd5 $TESTTMP/server2/foo default/foo | o 2:28ad74487de9 | o 1:29becc82797a | o 0:18d04c59bb5d `remotebookmarks` and `remotebranches` keywords $ hg log -G -T "{rev}:{node|short} [{remotebookmarks}] ({remotebranches})" @ 8:3e1487808078 [] ($TESTTMP/server2/wat default/wat) | | o 7:ec2426147f0e [] ($TESTTMP/server2/default default/default) | | | o 6:87d6d6676308 [$TESTTMP/server2/bar default/bar] () | | | o 5:825660c69f0c [] () |/ o 4:aa98ab95a928 [] () | o 3:62615734edd5 [$TESTTMP/server2/foo default/foo] () | o 2:28ad74487de9 [] () | o 1:29becc82797a [] () | o 0:18d04c59bb5d [] () The `hoistednames` template keyword $ hg log -GT "{rev}:{node|short} ({hoistednames})" @ 8:3e1487808078 () | | o 7:ec2426147f0e () | | | o 6:87d6d6676308 (bar) | | | o 5:825660c69f0c () |/ o 4:aa98ab95a928 () | o 3:62615734edd5 (foo) | o 2:28ad74487de9 () | o 1:29becc82797a () | o 0:18d04c59bb5d () Testing the revsets provided by remotenames extension `remotenames` revset $ hg log -r "remotenames()" -GT "{rev}:{node|short} {remotenames}\n" @ 8:3e1487808078 $TESTTMP/server2/wat default/wat : : o 7:ec2426147f0e $TESTTMP/server2/default default/default : | : o 6:87d6d6676308 $TESTTMP/server2/bar default/bar :/ o 3:62615734edd5 $TESTTMP/server2/foo default/foo | ~ `remotebranches` revset $ hg log -r "remotebranches()" -GT "{rev}:{node|short} {remotenames}\n" @ 8:3e1487808078 $TESTTMP/server2/wat default/wat | ~ o 7:ec2426147f0e $TESTTMP/server2/default default/default | ~ `remotebookmarks` revset $ hg log -r "remotebookmarks()" -GT "{rev}:{node|short} {remotenames}\n" o 6:87d6d6676308 $TESTTMP/server2/bar default/bar : o 3:62615734edd5 $TESTTMP/server2/foo default/foo | ~ Updating to revision using hoisted name --------------------------------------- Deleting local bookmark to make sure we update to hoisted name only $ hg bookmark -d bar $ hg up bar 2 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg log -r . changeset: 6:87d6d6676308 remote bookmark: $TESTTMP/server2/bar remote bookmark: default/bar hoisted name: bar user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Added g When both local bookmark and hoisted name exists but on different revs $ hg up 8 1 files updated, 0 files merged, 2 files removed, 0 files unresolved $ hg bookmark foo moving bookmark 'foo' forward from 62615734edd5 Local bookmark should take precedence over hoisted name $ hg up foo 0 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg log -r . changeset: 8:3e1487808078 branch: wat bookmark: foo tag: tip remote branch: $TESTTMP/server2/wat remote branch: default/wat parent: 4:aa98ab95a928 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: added bar $ hg bookmarks $TESTTMP/server2/bar 6:87d6d6676308 $TESTTMP/server2/foo 3:62615734edd5 default/bar 6:87d6d6676308 default/foo 3:62615734edd5 * foo 8:3e1487808078 Testing the remotenames sychronization during `hg push` ------------------------------------------------------- $ cd ../server/ $ hg bookmark foo moving bookmark 'foo' forward from 62615734edd5 After the push, default/foo should move to rev 8 $ cd ../client/ $ hg push pushing to ssh://user@dummy/server searching for changes no changes found [1] $ hg log -Gr 'remotenames()' @ changeset: 8:3e1487808078 : branch: wat : bookmark: foo : tag: tip : remote bookmark: default/foo : hoisted name: foo : remote branch: $TESTTMP/server2/wat : remote branch: default/wat : parent: 4:aa98ab95a928 : user: test : date: Thu Jan 01 00:00:00 1970 +0000 : summary: added bar : : o changeset: 7:ec2426147f0e : | remote branch: $TESTTMP/server2/default : | remote branch: default/default : | user: test : | date: Thu Jan 01 00:00:00 1970 +0000 : | summary: Added h : | : o changeset: 6:87d6d6676308 :/ remote bookmark: $TESTTMP/server2/bar : remote bookmark: default/bar : hoisted name: bar : user: test : date: Thu Jan 01 00:00:00 1970 +0000 : summary: Added g : o changeset: 3:62615734edd5 | remote bookmark: $TESTTMP/server2/foo ~ user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Added d $ hg bookmarks $TESTTMP/server2/bar 6:87d6d6676308 $TESTTMP/server2/foo 3:62615734edd5 default/bar 6:87d6d6676308 default/foo 8:3e1487808078 * foo 8:3e1487808078 Testing the names argument to remotenames, remotebranches and remotebookmarks revsets -------------------------------------------------------------------------------------- $ cd .. $ hg clone ssh://user@dummy/server client2 requesting all changes adding changesets adding manifests adding file changes added 9 changesets with 9 changes to 9 files (+1 heads) new changesets 18d04c59bb5d:3e1487808078 updating to branch default 8 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd server2 $ hg up wat 6 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo foo > watwat $ hg ci -Aqm "added watwat" $ hg bookmark bar abort: bookmark 'bar' already exists (use -f to force) [255] $ hg up ec24 3 files updated, 0 files merged, 2 files removed, 0 files unresolved $ echo i > i $ hg ci -Aqm "added i" $ cd ../client2 $ echo "[paths]" >> .hg/hgrc $ echo "server2 = $TESTTMP/server2" >> .hg/hgrc $ hg pull server2 pulling from $TESTTMP/server2 searching for changes adding changesets adding manifests adding file changes added 2 changesets with 2 changes to 2 files new changesets f34adec73c21:bf433e48adea (run 'hg update' to get a working copy) $ hg log -Gr 'remotenames()' -T '{rev}:{node|short} {desc}\n({remotebranches}) [{remotebookmarks}]\n\n' o 10:bf433e48adea added i | (server2/default) [] | | o 9:f34adec73c21 added watwat | | (server2/wat) [] | | | o 8:3e1487808078 added bar | : (default/wat) [default/foo] | : @ : 7:ec2426147f0e Added h | : (default/default) [] | : o : 6:87d6d6676308 Added g :/ () [default/bar server2/bar] : o 3:62615734edd5 Added d | () [server2/foo] ~ Testing for a single remote name which exists $ hg log -r 'remotebranches("default/wat")' -GT "{rev}:{node|short} {remotebranches}\n" o 8:3e1487808078 default/wat | ~ $ hg log -r 'remotebookmarks("server2/foo")' -GT "{rev}:{node|short} {remotebookmarks}\n" o 3:62615734edd5 server2/foo | ~ $ hg log -r 'remotenames("re:default")' -GT "{rev}:{node|short} {remotenames}\n" o 10:bf433e48adea server2/default | | o 8:3e1487808078 default/foo default/wat | | | ~ @ 7:ec2426147f0e default/default | o 6:87d6d6676308 default/bar server2/bar | ~ Testing for a literal name which does not exists, which should fail. $ hg log -r 'remotebranches(def)' -GT "{rev}:{node|short} {remotenames}\n" abort: remote name 'def' does not exist! [255] $ hg log -r 'remotebookmarks("server3")' -GT "{rev}:{node|short} {remotenames}\n" abort: remote name 'server3' does not exist! [255] $ hg log -r 'remotenames("server3")' -GT "{rev}:{node|short} {remotenames}\n" abort: remote name 'server3' does not exist! [255] Testing for a pattern which does not match anything, which shouldn't fail. $ hg log -r 'remotenames("re:^server3$")' Testing for multiple names, which is not supported. $ hg log -r 'remotenames("re:default", "re:server2")' -GT "{rev}:{node|short} {remotenames}\n" hg: parse error: only one argument accepted [255] $ hg log -r 'remotebranches("default/wat", "server2/wat")' -GT "{rev}:{node|short} {remotebranches}\n" hg: parse error: only one argument accepted [255] $ hg log -r 'remotebookmarks("default/foo", "server2/foo")' -GT "{rev}:{node|short} {remotebookmarks}\n" hg: parse error: only one argument accepted [255] Testing pattern matching $ hg log -r 'remotenames("re:def")' -GT "{rev}:{node|short} {remotenames}\n" o 10:bf433e48adea server2/default | | o 8:3e1487808078 default/foo default/wat | | | ~ @ 7:ec2426147f0e default/default | o 6:87d6d6676308 default/bar server2/bar | ~ $ hg log -r 'remotebranches("re:ser.*2")' -GT "{rev}:{node|short} {remotebranches}\n" o 10:bf433e48adea server2/default | ~ o 9:f34adec73c21 server2/wat | ~