Mercurial > hg
view tests/test-merge-criss-cross.t @ 28240:1ac8ce137377
changegroup: fix treemanifests on merges
The current code for generating treemanifest revisions takes the list
of files in the changeset and finds the directories from them. This
does not work for merges, since a merge may pick file A from one side
and file B from another and neither of them would appear in the
changeset's "files" list, but the manifest would still change.
Fix this by instead walking the root manifest log for all needed
revisions, storing all needed file and subdirectory revisions, then
recursively visiting the subdirectories. This also turns out to be
faster: cloning a version of hg core converted to treemanifests went
from ~28s to ~19s (timing somewhat unfair: before this patch, timed
until crash; after this patch, timed until manifests complete).
The new algorithm is used only on treemanifest repos. Although it
works equally well on flat manifests, we leave the iteration over
files in the changeset for flat manifests for now.
author | Martin von Zweigbergk <martinvonz@google.com> |
---|---|
date | Fri, 12 Feb 2016 23:09:09 -0800 |
parents | 6b1fc09c699a |
children | 72c36a2be2d6 |
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Criss cross merging $ hg init criss-cross $ cd criss-cross $ echo '0 base' > f1 $ echo '0 base' > f2 $ hg ci -Aqm '0 base' $ echo '1 first change' > f1 $ hg ci -m '1 first change f1' $ hg up -qr0 $ echo '2 first change' > f2 $ hg ci -qm '2 first change f2' $ hg merge -qr 1 $ hg ci -m '3 merge' $ hg up -qr2 $ hg merge -qr1 $ hg ci -qm '4 merge' $ echo '5 second change' > f1 $ hg ci -m '5 second change f1' $ hg up -r3 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo '6 second change' > f2 $ hg ci -m '6 second change f2' $ hg log -G @ changeset: 6:3b08d01b0ab5 | tag: tip | parent: 3:cf89f02107e5 | user: test | date: Thu Jan 01 00:00:00 1970 +0000 | summary: 6 second change f2 | | o changeset: 5:adfe50279922 | | user: test | | date: Thu Jan 01 00:00:00 1970 +0000 | | summary: 5 second change f1 | | | o changeset: 4:7d3e55501ae6 | |\ parent: 2:40663881a6dd | | | parent: 1:0f6b37dbe527 | | | user: test | | | date: Thu Jan 01 00:00:00 1970 +0000 | | | summary: 4 merge | | | o---+ changeset: 3:cf89f02107e5 | | | parent: 2:40663881a6dd |/ / parent: 1:0f6b37dbe527 | | user: test | | date: Thu Jan 01 00:00:00 1970 +0000 | | summary: 3 merge | | | o changeset: 2:40663881a6dd | | parent: 0:40494bf2444c | | user: test | | date: Thu Jan 01 00:00:00 1970 +0000 | | summary: 2 first change f2 | | o | changeset: 1:0f6b37dbe527 |/ user: test | date: Thu Jan 01 00:00:00 1970 +0000 | summary: 1 first change f1 | o changeset: 0:40494bf2444c user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: 0 base $ hg merge -v --debug --tool internal:dump 5 --config merge.preferancestor='!' note: using 0f6b37dbe527 as ancestor of 3b08d01b0ab5 and adfe50279922 alternatively, use --config merge.preferancestor=40663881a6dd searching for copies back to rev 3 resolving manifests branchmerge: True, force: False, partial: False ancestor: 0f6b37dbe527, local: 3b08d01b0ab5+, remote: adfe50279922 preserving f2 for resolve of f2 f1: remote is newer -> g getting f1 f2: versions differ -> m (premerge) picked tool ':dump' for f2 (binary False symlink False changedelete False) merging f2 my f2@3b08d01b0ab5+ other f2@adfe50279922 ancestor f2@0f6b37dbe527 f2: versions differ -> m (merge) picked tool ':dump' for f2 (binary False symlink False changedelete False) my f2@3b08d01b0ab5+ other f2@adfe50279922 ancestor f2@0f6b37dbe527 1 files updated, 0 files merged, 0 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon [1] $ head * ==> f1 <== 5 second change ==> f2 <== 6 second change ==> f2.base <== 0 base ==> f2.local <== 6 second change ==> f2.orig <== 6 second change ==> f2.other <== 2 first change $ hg up -qC . $ hg merge -v --tool internal:dump 5 --config merge.preferancestor="null 40663881 3b08d" note: using 40663881a6dd as ancestor of 3b08d01b0ab5 and adfe50279922 alternatively, use --config merge.preferancestor=0f6b37dbe527 resolving manifests merging f1 0 files updated, 0 files merged, 0 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon [1] Redo merge with merge.preferancestor="*" to enable bid merge $ rm f* $ hg up -qC . $ hg merge -v --debug --tool internal:dump 5 --config merge.preferancestor="*" note: merging 3b08d01b0ab5+ and adfe50279922 using bids from ancestors 0f6b37dbe527 and 40663881a6dd calculating bids for ancestor 0f6b37dbe527 searching for copies back to rev 3 resolving manifests branchmerge: True, force: False, partial: False ancestor: 0f6b37dbe527, local: 3b08d01b0ab5+, remote: adfe50279922 f1: remote is newer -> g f2: versions differ -> m calculating bids for ancestor 40663881a6dd searching for copies back to rev 3 resolving manifests branchmerge: True, force: False, partial: False ancestor: 40663881a6dd, local: 3b08d01b0ab5+, remote: adfe50279922 f1: versions differ -> m f2: remote unchanged -> k auction for merging merge bids f1: picking 'get' action f2: picking 'keep' action end of auction f1: remote is newer -> g getting f1 f2: remote unchanged -> k 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ head * ==> f1 <== 5 second change ==> f2 <== 6 second change The other way around: $ hg up -C -r5 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg merge -v --debug --config merge.preferancestor="*" note: merging adfe50279922+ and 3b08d01b0ab5 using bids from ancestors 0f6b37dbe527 and 40663881a6dd calculating bids for ancestor 0f6b37dbe527 searching for copies back to rev 3 resolving manifests branchmerge: True, force: False, partial: False ancestor: 0f6b37dbe527, local: adfe50279922+, remote: 3b08d01b0ab5 f1: remote unchanged -> k f2: versions differ -> m calculating bids for ancestor 40663881a6dd searching for copies back to rev 3 resolving manifests branchmerge: True, force: False, partial: False ancestor: 40663881a6dd, local: adfe50279922+, remote: 3b08d01b0ab5 f1: versions differ -> m f2: remote is newer -> g auction for merging merge bids f1: picking 'keep' action f2: picking 'get' action end of auction f2: remote is newer -> g getting f2 f1: remote unchanged -> k 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ head * ==> f1 <== 5 second change ==> f2 <== 6 second change Verify how the output looks and and how verbose it is: $ hg up -qC $ hg merge 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg up -qC tip $ hg merge -v note: merging 3b08d01b0ab5+ and adfe50279922 using bids from ancestors 0f6b37dbe527 and 40663881a6dd calculating bids for ancestor 0f6b37dbe527 resolving manifests calculating bids for ancestor 40663881a6dd resolving manifests auction for merging merge bids f1: picking 'get' action f2: picking 'keep' action end of auction getting f1 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg up -qC $ hg merge -v --debug --config merge.preferancestor="*" note: merging 3b08d01b0ab5+ and adfe50279922 using bids from ancestors 0f6b37dbe527 and 40663881a6dd calculating bids for ancestor 0f6b37dbe527 searching for copies back to rev 3 resolving manifests branchmerge: True, force: False, partial: False ancestor: 0f6b37dbe527, local: 3b08d01b0ab5+, remote: adfe50279922 f1: remote is newer -> g f2: versions differ -> m calculating bids for ancestor 40663881a6dd searching for copies back to rev 3 resolving manifests branchmerge: True, force: False, partial: False ancestor: 40663881a6dd, local: 3b08d01b0ab5+, remote: adfe50279922 f1: versions differ -> m f2: remote unchanged -> k auction for merging merge bids f1: picking 'get' action f2: picking 'keep' action end of auction f1: remote is newer -> g getting f1 f2: remote unchanged -> k 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cd .. http://stackoverflow.com/questions/9350005/how-do-i-specify-a-merge-base-to-use-in-a-hg-merge/9430810 $ hg init ancestor-merging $ cd ancestor-merging $ echo a > x $ hg commit -A -m a x $ hg update -q 0 $ echo b >> x $ hg commit -m b $ hg update -q 0 $ echo c >> x $ hg commit -qm c $ hg update -q 1 $ hg merge -q --tool internal:local 2 $ echo c >> x $ hg commit -m bc $ hg update -q 2 $ hg merge -q --tool internal:local 1 $ echo b >> x $ hg commit -qm cb $ hg merge --config merge.preferancestor='!' note: using 70008a2163f6 as ancestor of 0d355fdef312 and 4b8b546a3eef alternatively, use --config merge.preferancestor=b211bbc6eb3c merging x 0 files updated, 1 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat x a c b c $ hg up -qC . $ hg merge --config merge.preferancestor=b211bbc6eb3c note: using b211bbc6eb3c as ancestor of 0d355fdef312 and 4b8b546a3eef alternatively, use --config merge.preferancestor=70008a2163f6 merging x 0 files updated, 1 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat x a b c b $ hg up -qC . $ hg merge -v --config merge.preferancestor="*" note: merging 0d355fdef312+ and 4b8b546a3eef using bids from ancestors 70008a2163f6 and b211bbc6eb3c calculating bids for ancestor 70008a2163f6 resolving manifests calculating bids for ancestor b211bbc6eb3c resolving manifests auction for merging merge bids x: multiple bids for merge action: versions differ -> m versions differ -> m x: ambiguous merge - picked m action end of auction merging x 0 files updated, 1 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat x a c b c Verify that the old context ancestor works with / despite preferancestor: $ hg log -r 'ancestor(head())' --config merge.preferancestor=1 -T '{rev}\n' 1 $ hg log -r 'ancestor(head())' --config merge.preferancestor=2 -T '{rev}\n' 2 $ hg log -r 'ancestor(head())' --config merge.preferancestor=3 -T '{rev}\n' 1 $ hg log -r 'ancestor(head())' --config merge.preferancestor='1337 * - 2' -T '{rev}\n' 2 $ cd ..