Mercurial > hg
view tests/test-fetch.t @ 39496:2f9f7889549b
snapshot: introduce an intermediate `_refinedgroups` generator
This method will be used to improve the search for a good snapshot base. To
keep things simpler, we introduce the necessary function before doing any
delta base logic change. The next handful of commits will focus on refactoring
the code to let that new logic land as clearly as possible.
# General Idea
Right now, the search for a good delta base stop whenever we found a good one.
However, when using sparse-revlog, we should probably try a bit harder.
We do significant effort to increase delta re-use by jumping on "unrelated"
delta chains that provide better results. Moving to another chain for a better
result is good, but we have no guarantee we jump at a reasonable point in that
new chain. When we consider over the chains related to the parents, we start
from the higher-level snapshots. This is a way to consider the snapshot closer
to the current revision that has the best chance to produce a small delta. We
do benefit from this walk order when jumping to a better "unrelated" stack.
To counter-balance this, we'll introduce a way to "refine" the result. After a
good delta have been found, we'll keep searching for a better delta, using the
current best one as a starting point.
# Target Setup
The `finddeltainfo` method is responsible for the general search for a good
delta. It requests candidates base from `_candidategroups` and decides which
one are usable.
The `_candidategroups` generator act as a top-level filter, it does not care
about how we pick candidates, it just does basic filtering, excluding
revisions that have been tested already or that are an obvious misfit.
The `_rawgroups` generator is the one with the actual ancestors walking logic,
It does not care about what would do a good delta and what was already tested,
it just issues the initial candidates.
We introduce a new `_refinedgroup` function to bridge the gap between
`_candidategroups` and `_rawgroups`. It delegates the initial iteration logic
and then performing relevant refining of the valid base once found. (This
logic is yet to be added to function)
All these logics are fairly independent and easier to understand when standing
alone, not mixed with each other. It also makes it easy to test and try
different approaches for one of those four layers without affecting the other
ones.
# Technical details
To communicate `finddeltainfo` choice of "current best delta base" to the
`_refinegroup` logic, we plan to use python co-routine feature. The
`_candidategroups` and `_refinegroup` generators will become co-routine. This
will allow `_refinegroup` to detect when a good delta have been found and
triggers various refining steps.
For now, `_candidategroups` will just pass the value down the stack.
After poking at various option, the co-routine appears the best to keep each
layers focus on its duty, without the need to spread implementation details
across layers.
author | Boris Feld <boris.feld@octobus.net> |
---|---|
date | Fri, 07 Sep 2018 11:17:32 -0400 |
parents | eb586ed5d8ce |
children | 5c2a4f37eace |
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#require serve $ echo "[extensions]" >> $HGRCPATH $ echo "fetch=" >> $HGRCPATH test fetch with default branches only $ hg init a $ echo a > a/a $ hg --cwd a commit -Ama adding a $ hg clone a b updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg clone a c updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo b > a/b $ hg --cwd a commit -Amb adding b $ hg --cwd a parents -q 1:d2ae7f538514 should pull one change $ hg --cwd b fetch ../a pulling from ../a searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets d2ae7f538514 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg --cwd b parents -q 1:d2ae7f538514 $ echo c > c/c $ hg --cwd c commit -Amc adding c $ hg clone c d updating to branch default 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg clone c e updating to branch default 2 files updated, 0 files merged, 0 files removed, 0 files unresolved We cannot use the default commit message if fetching from a local repo, because the path of the repo will be included in the commit message, making every commit appear different. should merge c into a $ hg --cwd c fetch -d '0 0' -m 'automated merge' ../a pulling from ../a searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets d2ae7f538514 updating to 2:d2ae7f538514 1 files updated, 0 files merged, 1 files removed, 0 files unresolved merging with 1:d36c0562f908 1 files updated, 0 files merged, 0 files removed, 0 files unresolved new changeset 3:a323a0c43ec4 merges remote changes with local $ ls c a b c $ hg serve --cwd a -a localhost -p $HGPORT -d --pid-file=hg.pid $ cat a/hg.pid >> "$DAEMON_PIDS" fetch over http, no auth (this also tests that editor is invoked if '--edit' is specified) $ HGEDITOR=cat hg --cwd d fetch --edit http://localhost:$HGPORT/ pulling from http://localhost:$HGPORT/ searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets d2ae7f538514 updating to 2:d2ae7f538514 1 files updated, 0 files merged, 1 files removed, 0 files unresolved merging with 1:d36c0562f908 1 files updated, 0 files merged, 0 files removed, 0 files unresolved Automated merge with http://localhost:$HGPORT/ HG: Enter commit message. Lines beginning with 'HG:' are removed. HG: Leave message empty to abort commit. HG: -- HG: user: test HG: branch merge HG: branch 'default' HG: changed c new changeset 3:* merges remote changes with local (glob) $ hg --cwd d tip --template '{desc}\n' Automated merge with http://localhost:$HGPORT/ $ hg --cwd d status --rev 'tip^1' --rev tip A c $ hg --cwd d status --rev 'tip^2' --rev tip A b fetch over http with auth (should be hidden in desc) (this also tests that editor is not invoked if '--edit' is not specified, even though commit message is not specified explicitly) $ HGEDITOR=cat hg --cwd e fetch http://user:password@localhost:$HGPORT/ pulling from http://user:***@localhost:$HGPORT/ searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets d2ae7f538514 updating to 2:d2ae7f538514 1 files updated, 0 files merged, 1 files removed, 0 files unresolved merging with 1:d36c0562f908 1 files updated, 0 files merged, 0 files removed, 0 files unresolved new changeset 3:* merges remote changes with local (glob) $ hg --cwd e tip --template '{desc}\n' Automated merge with http://localhost:$HGPORT/ $ hg clone a f updating to branch default 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg clone a g updating to branch default 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo f > f/f $ hg --cwd f ci -Amf adding f $ echo g > g/g $ hg --cwd g ci -Amg adding g $ hg clone -q f h $ hg clone -q g i should merge f into g $ hg --cwd g fetch -d '0 0' --switch -m 'automated merge' ../f pulling from ../f searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets 6343ca3eff20 0 files updated, 0 files merged, 0 files removed, 0 files unresolved merging with 3:6343ca3eff20 1 files updated, 0 files merged, 0 files removed, 0 files unresolved new changeset 4:f7faa0b7d3c6 merges remote changes with local $ rm i/g should abort, because i is modified $ hg --cwd i fetch ../h abort: uncommitted changes [255] test fetch with named branches $ hg init nbase $ echo base > nbase/a $ hg -R nbase ci -Am base adding a $ hg -R nbase branch a marked working directory as branch a (branches are permanent and global, did you want a bookmark?) $ echo a > nbase/a $ hg -R nbase ci -m a $ hg -R nbase up -C 0 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg -R nbase branch b marked working directory as branch b $ echo b > nbase/b $ hg -R nbase ci -Am b adding b pull in change on foreign branch $ hg clone nbase n1 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg clone nbase n2 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg -R n1 up -C a 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo aa > n1/a $ hg -R n1 ci -m a1 $ hg -R n2 up -C b 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg -R n2 fetch -m 'merge' n1 pulling from n1 searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets 8fdc9284bbc5 parent should be 2 (no automatic update) $ hg -R n2 parents --template '{rev}\n' 2 $ rm -fr n1 n2 pull in changes on both foreign and local branches $ hg clone nbase n1 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg clone nbase n2 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg -R n1 up -C a 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo aa > n1/a $ hg -R n1 ci -m a1 $ hg -R n1 up -C b 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo bb > n1/b $ hg -R n1 ci -m b1 $ hg -R n2 up -C b 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg -R n2 fetch -m 'merge' n1 pulling from n1 searching for changes adding changesets adding manifests adding file changes added 2 changesets with 2 changes to 2 files new changesets 8fdc9284bbc5:3c4a837a864f 1 files updated, 0 files merged, 0 files removed, 0 files unresolved parent should be 4 (fast forward) $ hg -R n2 parents --template '{rev}\n' 4 $ rm -fr n1 n2 pull changes on foreign (2 new heads) and local (1 new head) branches with a local change $ hg clone nbase n1 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg clone nbase n2 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg -R n1 up -C a 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo a1 > n1/a $ hg -R n1 ci -m a1 $ hg -R n1 up -C b 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo bb > n1/b $ hg -R n1 ci -m b1 $ hg -R n1 up -C 1 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ echo a2 > n1/a $ hg -R n1 ci -m a2 created new head $ hg -R n2 up -C b 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo change >> n2/c $ hg -R n2 ci -A -m local adding c $ hg -R n2 fetch -d '0 0' -m 'merge' n1 pulling from n1 searching for changes adding changesets adding manifests adding file changes added 3 changesets with 3 changes to 2 files (+2 heads) new changesets d05ce59ff88d:a7954de24e4c updating to 5:3c4a837a864f 1 files updated, 0 files merged, 1 files removed, 0 files unresolved merging with 3:1267f84a9ea5 1 files updated, 0 files merged, 0 files removed, 0 files unresolved new changeset 7:2cf2a1261f21 merges remote changes with local parent should be 7 (new merge changeset) $ hg -R n2 parents --template '{rev}\n' 7 $ rm -fr n1 n2 pull in changes on foreign (merge of local branch) and local (2 new heads) with a local change $ hg clone nbase n1 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg clone nbase n2 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg -R n1 up -C a 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg -R n1 merge b 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg -R n1 ci -m merge $ hg -R n1 up -C 2 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo c > n1/a $ hg -R n1 ci -m c $ hg -R n1 up -C 2 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo cc > n1/a $ hg -R n1 ci -m cc created new head $ hg -R n2 up -C b 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo change >> n2/b $ hg -R n2 ci -A -m local $ hg -R n2 fetch -m 'merge' n1 pulling from n1 searching for changes adding changesets adding manifests adding file changes added 3 changesets with 2 changes to 1 files (+2 heads) new changesets b84e8d0f020f:3d3bf54f99c0 not merging with 1 other new branch heads (use "hg heads ." and "hg merge" to merge them) [1] parent should be 3 (fetch did not merge anything) $ hg -R n2 parents --template '{rev}\n' 3 $ rm -fr n1 n2 pull in change on different branch than dirstate $ hg init n1 $ echo a > n1/a $ hg -R n1 ci -Am initial adding a $ hg clone n1 n2 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo b > n1/a $ hg -R n1 ci -m next $ hg -R n2 branch topic marked working directory as branch topic (branches are permanent and global, did you want a bookmark?) $ hg -R n2 fetch -m merge n1 abort: working directory not at branch tip (use 'hg update' to check out branch tip) [255] parent should be 0 (fetch did not update or merge anything) $ hg -R n2 parents --template '{rev}\n' 0 $ rm -fr n1 n2 test fetch with inactive branches $ hg init ib1 $ echo a > ib1/a $ hg --cwd ib1 ci -Am base adding a $ hg --cwd ib1 branch second marked working directory as branch second (branches are permanent and global, did you want a bookmark?) $ echo b > ib1/b $ hg --cwd ib1 ci -Am onsecond adding b $ hg --cwd ib1 branch -f default marked working directory as branch default $ echo c > ib1/c $ hg --cwd ib1 ci -Am newdefault adding c created new head $ hg clone ib1 ib2 updating to branch default 3 files updated, 0 files merged, 0 files removed, 0 files unresolved fetch should succeed $ hg --cwd ib2 fetch ../ib1 pulling from ../ib1 searching for changes no changes found $ rm -fr ib1 ib2 test issue1726 $ hg init i1726r1 $ echo a > i1726r1/a $ hg --cwd i1726r1 ci -Am base adding a $ hg clone i1726r1 i1726r2 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo b > i1726r1/a $ hg --cwd i1726r1 ci -m second $ echo c > i1726r2/a $ hg --cwd i1726r2 ci -m third $ HGMERGE=true hg --cwd i1726r2 fetch ../i1726r1 pulling from ../i1726r1 searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets 7837755a2789 updating to 2:7837755a2789 1 files updated, 0 files merged, 0 files removed, 0 files unresolved merging with 1:d1f0c6c48ebd merging a 0 files updated, 1 files merged, 0 files removed, 0 files unresolved new changeset 3:* merges remote changes with local (glob) $ hg --cwd i1726r2 heads default --template '{rev}\n' 3 test issue2047 $ hg -q init i2047a $ cd i2047a $ echo a > a $ hg -q ci -Am a $ hg -q branch stable $ echo b > b $ hg -q ci -Am b $ cd .. $ hg -q clone -r 0 i2047a i2047b $ cd i2047b $ hg fetch ../i2047a pulling from ../i2047a searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets c8735224de5c $ cd ..