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revisionbranchcache: fall back to slow path if starting readonly (issue4531)...
revisionbranchcache: fall back to slow path if starting readonly (issue4531) Transitioning to Mercurial versions with revision branch cache could be slow as long as all operations were readonly (revset queries) and the cache would be populated but not written back. Instead, fall back to using the consistently slow path when readonly and the cache doesn't exist yet. That avoids the overhead of populating the cache without writing it back. If not readonly, it will still populate all missing entries initially. That avoids repeated writing of the cache file with small updates, and it also makes sure a fully populated cache available for the readonly operations.
Pierre-Yves David - - Load All Authors

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r22972:44b16b59 default
r24159:5b4ed033 3.3.1 stable
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test-bundle2-multiple-changegroups.t
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Create an extension to test bundle2 with multiple changegroups
$ cat > bundle2.py <<EOF
> """
> """
> from mercurial import changegroup, exchange
>
> def _getbundlechangegrouppart(bundler, repo, source, bundlecaps=None,
> b2caps=None, heads=None, common=None,
> **kwargs):
> # Create two changegroups given the common changesets and heads for the
> # changegroup part we are being requested. Use the parent of each head
> # in 'heads' as intermediate heads for the first changegroup.
> intermediates = [repo[r].p1().node() for r in heads]
> cg = changegroup.getchangegroup(repo, source, heads=intermediates,
> common=common, bundlecaps=bundlecaps)
> bundler.newpart('b2x:output', data='changegroup1')
> bundler.newpart('b2x:changegroup', data=cg.getchunks())
> cg = changegroup.getchangegroup(repo, source, heads=heads,
> common=common + intermediates,
> bundlecaps=bundlecaps)
> bundler.newpart('b2x:output', data='changegroup2')
> bundler.newpart('b2x:changegroup', data=cg.getchunks())
>
> def _pull(repo, *args, **kwargs):
> pullop = _orig_pull(repo, *args, **kwargs)
> repo.ui.write('pullop.cgresult is %d\n' % pullop.cgresult)
> return pullop
>
> _orig_pull = exchange.pull
> exchange.pull = _pull
> exchange.getbundle2partsmapping['changegroup'] = _getbundlechangegrouppart
> EOF
$ cat >> $HGRCPATH << EOF
> [experimental]
> bundle2-exp=True
> [ui]
> logtemplate={rev}:{node|short} {phase} {author} {bookmarks} {desc|firstline}
> EOF
Start with a simple repository with a single commit
$ hg init repo
$ cd repo
$ cat > .hg/hgrc << EOF
> [extensions]
> bundle2=$TESTTMP/bundle2.py
> EOF
$ echo A > A
$ hg commit -A -m A -q
$ cd ..
Clone
$ hg clone -q repo clone
Add two linear commits
$ cd repo
$ echo B > B
$ hg commit -A -m B -q
$ echo C > C
$ hg commit -A -m C -q
$ cd ../clone
$ cat >> .hg/hgrc <<EOF
> [hooks]
> pretxnchangegroup = sh -c "python \"$TESTDIR/printenv.py\" pretxnchangegroup"
> changegroup = sh -c "python \"$TESTDIR/printenv.py\" changegroup"
> incoming = sh -c "python \"$TESTDIR/printenv.py\" incoming"
> EOF
Pull the new commits in the clone
$ hg pull
pulling from $TESTTMP/repo (glob)
searching for changes
remote: changegroup1
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
pretxnchangegroup hook: HG_NODE=27547f69f25460a52fff66ad004e58da7ad3fb56 HG_PENDING=$TESTTMP/clone HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
remote: changegroup2
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
pretxnchangegroup hook: HG_NODE=f838bfaca5c7226600ebcfd84f3c3c13a28d3757 HG_PENDING=$TESTTMP/clone HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
changegroup hook: HG_NODE=27547f69f25460a52fff66ad004e58da7ad3fb56 HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
incoming hook: HG_NODE=27547f69f25460a52fff66ad004e58da7ad3fb56 HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
changegroup hook: HG_NODE=f838bfaca5c7226600ebcfd84f3c3c13a28d3757 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
incoming hook: HG_NODE=f838bfaca5c7226600ebcfd84f3c3c13a28d3757 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
pullop.cgresult is 1
(run 'hg update' to get a working copy)
$ hg update
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg log -G
@ 2:f838bfaca5c7 public test C
|
o 1:27547f69f254 public test B
|
o 0:4a2df7238c3b public test A
Add more changesets with multiple heads to the original repository
$ cd ../repo
$ echo D > D
$ hg commit -A -m D -q
$ hg up -r 1
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ echo E > E
$ hg commit -A -m E -q
$ echo F > F
$ hg commit -A -m F -q
$ hg up -r 1
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ echo G > G
$ hg commit -A -m G -q
$ hg up -r 3
2 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ echo H > H
$ hg commit -A -m H -q
$ hg log -G
@ 7:5cd59d311f65 draft test H
|
| o 6:1d14c3ce6ac0 draft test G
| |
| | o 5:7f219660301f draft test F
| | |
| | o 4:8a5212ebc852 draft test E
| |/
o | 3:b3325c91a4d9 draft test D
| |
o | 2:f838bfaca5c7 draft test C
|/
o 1:27547f69f254 draft test B
|
o 0:4a2df7238c3b draft test A
New heads are reported during transfer and properly accounted for in
pullop.cgresult
$ cd ../clone
$ hg pull
pulling from $TESTTMP/repo (glob)
searching for changes
remote: changegroup1
adding changesets
adding manifests
adding file changes
added 2 changesets with 2 changes to 2 files (+1 heads)
pretxnchangegroup hook: HG_NODE=b3325c91a4d916bcc4cdc83ea3fe4ece46a42f6e HG_PENDING=$TESTTMP/clone HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
remote: changegroup2
adding changesets
adding manifests
adding file changes
added 3 changesets with 3 changes to 3 files (+1 heads)
pretxnchangegroup hook: HG_NODE=7f219660301fe4c8a116f714df5e769695cc2b46 HG_PENDING=$TESTTMP/clone HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
changegroup hook: HG_NODE=b3325c91a4d916bcc4cdc83ea3fe4ece46a42f6e HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
incoming hook: HG_NODE=b3325c91a4d916bcc4cdc83ea3fe4ece46a42f6e HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
incoming hook: HG_NODE=8a5212ebc8527f9fb821601504794e3eb11a1ed3 HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
changegroup hook: HG_NODE=7f219660301fe4c8a116f714df5e769695cc2b46 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
incoming hook: HG_NODE=7f219660301fe4c8a116f714df5e769695cc2b46 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
incoming hook: HG_NODE=1d14c3ce6ac0582d2809220d33e8cd7a696e0156 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
incoming hook: HG_NODE=5cd59d311f6508b8e0ed28a266756c859419c9f1 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
pullop.cgresult is 3
(run 'hg heads' to see heads, 'hg merge' to merge)
$ hg log -G
o 7:5cd59d311f65 public test H
|
| o 6:1d14c3ce6ac0 public test G
| |
| | o 5:7f219660301f public test F
| | |
| | o 4:8a5212ebc852 public test E
| |/
o | 3:b3325c91a4d9 public test D
| |
@ | 2:f838bfaca5c7 public test C
|/
o 1:27547f69f254 public test B
|
o 0:4a2df7238c3b public test A
Removing a head from the original repository by merging it
$ cd ../repo
$ hg merge -r 6 -q
$ hg commit -m Merge
$ echo I > I
$ hg commit -A -m H -q
$ hg log -G
@ 9:9d18e5bd9ab0 draft test H
|
o 8:71bd7b46de72 draft test Merge
|\
| o 7:5cd59d311f65 draft test H
| |
o | 6:1d14c3ce6ac0 draft test G
| |
| | o 5:7f219660301f draft test F
| | |
+---o 4:8a5212ebc852 draft test E
| |
| o 3:b3325c91a4d9 draft test D
| |
| o 2:f838bfaca5c7 draft test C
|/
o 1:27547f69f254 draft test B
|
o 0:4a2df7238c3b draft test A
Removed heads are reported during transfer and properly accounted for in
pullop.cgresult
$ cd ../clone
$ hg pull
pulling from $TESTTMP/repo (glob)
searching for changes
remote: changegroup1
adding changesets
adding manifests
adding file changes
added 1 changesets with 0 changes to 0 files (-1 heads)
pretxnchangegroup hook: HG_NODE=71bd7b46de72e69a32455bf88d04757d542e6cf4 HG_PENDING=$TESTTMP/clone HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
remote: changegroup2
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
pretxnchangegroup hook: HG_NODE=9d18e5bd9ab09337802595d49f1dad0c98df4d84 HG_PENDING=$TESTTMP/clone HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
changegroup hook: HG_NODE=71bd7b46de72e69a32455bf88d04757d542e6cf4 HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
incoming hook: HG_NODE=71bd7b46de72e69a32455bf88d04757d542e6cf4 HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
changegroup hook: HG_NODE=9d18e5bd9ab09337802595d49f1dad0c98df4d84 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
incoming hook: HG_NODE=9d18e5bd9ab09337802595d49f1dad0c98df4d84 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=file:$TESTTMP/repo
pullop.cgresult is -2
(run 'hg update' to get a working copy)
$ hg log -G
o 9:9d18e5bd9ab0 public test H
|
o 8:71bd7b46de72 public test Merge
|\
| o 7:5cd59d311f65 public test H
| |
o | 6:1d14c3ce6ac0 public test G
| |
| | o 5:7f219660301f public test F
| | |
+---o 4:8a5212ebc852 public test E
| |
| o 3:b3325c91a4d9 public test D
| |
| @ 2:f838bfaca5c7 public test C
|/
o 1:27547f69f254 public test B
|
o 0:4a2df7238c3b public test A