Mercurial > hg
view tests/test-graft.t @ 16509:eab9119c5dee stable
rebase: skip resolved but emptied revisions
When rebasing, if a conflict occurs and is resolved in a way the rebased
revision becomes empty, it is not skipped, unlike revisions being emptied
without conflicts.
The reason is:
- File 'x' is merged and resolved, merge.update() marks it as 'm' in the
dirstate.
- rebase.concludenode() calls localrepo.commit(), which calls
localrepo.status() which calls dirstate.status(). 'x' shows up as 'm' and is
unconditionnally added to the modified files list, instead of being checked
again.
- localrepo.commit() detects 'x' as changed an create a new revision where only
the manifest parents and linkrev differ.
Marking 'x' as modified without checking it makes sense for regular merges. But
in rebase case, the merge looks normal but the second parent is usually
discarded. When this happens, 'm' files in dirstate are a bit irrelevant and
should be considered 'n' possibly dirty instead. That is what the current patch
does.
Another approach, maybe more efficient, would be to pass another flag to
merge.update() saying the 'branchmerge' is a bit of a lie and recordupdate()
should call dirstate.normallookup() instead of merge().
It is also tempting to add this logic to dirstate.setparents(), moving from two
to one parent is what invalidates the 'm' markers. But this is a far bigger
change to make.
v2: succumb to the temptation and move the logic in dirstate.setparents(). mpm
suggested trying _filecommit() first but it is called by commitctx() which
knows nothing about the dirstate and comes too late into the game. A second
approach was to rewrite the 'm' state into 'n' on the fly in dirstate.status()
which failed for graft in the following case:
$ hg init repo
$ cd repo
$ echo a > a
$ hg ci -qAm0
$ echo a >> a
$ hg ci -m1
$ hg up 0
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg mv a b
$ echo c > b
$ hg ci -m2
created new head
$ hg graft 1 --tool internal:local
grafting revision 1
$ hg --config extensions.graphlog= glog --template '{rev} {desc|firstline}\n'
@ 3 1
|
o 2 2
|
| o 1 1
|/
o 0 0
$ hg log -r 3 --debug --patch --git --copies
changeset: 3:19cd7d1417952af13161b94c32e901769104560c
tag: tip
phase: draft
parent: 2:b5c505595c9e9a12d5dd457919c143e05fc16fb8
parent: -1:0000000000000000000000000000000000000000
manifest: 3:3d27ce8d02241aa59b60804805edf103c5c0cda4
user: test
date: Thu Jan 01 00:00:00 1970 +0000
extra: branch=default
extra: source=a03df74c41413a75c0a42997fc36c2de97b26658
description:
1
Here, revision 3 is created because there is a copy record for 'b' in the
dirstate and thus 'b' is considered modified. But this information is discarded
at commit time since 'b' content is unchanged. I do not know if discarding this
information is correct or not, but at this time we cannot represent it anyway.
This patch therefore implements the last solution of moving the logic into
dirstate.setparents(). It does not sound crazy as 'm' files makes no sense with
only one parent. It also makes dirstate.merge() calls .lookupnormal() if there
is one parent, to preserve the invariant.
I am a bit concerned about introducing this kind of stateful behaviour to
existing code which historically treated setparents() as a basic setter without
side-effects. And doing that during the code freeze.
author | Patrick Mezard <patrick@mezard.eu> |
---|---|
date | Sun, 22 Apr 2012 20:06:36 +0200 |
parents | 475de53c08f4 |
children | b54f3c502e63 52ea9ce5b641 |
line wrap: on
line source
Create a repo with some stuff in it: $ hg init a $ cd a $ echo a > a $ echo a > d $ echo a > e $ hg ci -qAm0 $ echo b > a $ hg ci -m1 -u bar $ hg mv a b $ hg ci -m2 $ hg cp b c $ hg ci -m3 -u baz $ echo b > d $ echo f > e $ hg ci -m4 $ hg up -q 3 $ echo b > e $ hg branch -q stable $ hg ci -m5 $ hg merge -q default --tool internal:local $ hg branch -q default $ hg ci -m6 $ hg phase --public 3 $ hg phase --force --secret 6 $ hg --config extensions.graphlog= log -G --template '{author}@{rev}.{phase}: {desc}\n' @ test@6.secret: 6 |\ | o test@5.draft: 5 | | o | test@4.draft: 4 |/ o baz@3.public: 3 | o test@2.public: 2 | o bar@1.public: 1 | o test@0.public: 0 Need to specify a rev: $ hg graft abort: no revisions specified [255] Can't graft ancestor: $ hg graft 1 2 skipping ancestor revision 1 skipping ancestor revision 2 [255] Can't graft with dirty wd: $ hg up -q 0 $ echo foo > a $ hg graft 1 abort: outstanding uncommitted changes [255] $ hg revert a Graft a rename: $ hg graft 2 -u foo grafting revision 2 merging a and b to b $ hg export tip --git # HG changeset patch # User foo # Date 0 0 # Node ID d2e44c99fd3f31c176ea4efb9eca9f6306c81756 # Parent 68795b066622ca79a25816a662041d8f78f3cd9e 2 diff --git a/a b/b rename from a rename to b --- a/a +++ b/b @@ -1,1 +1,1 @@ -a +b Look for extra:source $ hg log --debug -r tip changeset: 7:d2e44c99fd3f31c176ea4efb9eca9f6306c81756 tag: tip phase: draft parent: 0:68795b066622ca79a25816a662041d8f78f3cd9e parent: -1:0000000000000000000000000000000000000000 manifest: 7:5d59766436fd8fbcd38e7bebef0f6eaf3eebe637 user: foo date: Thu Jan 01 00:00:00 1970 +0000 files+: b files-: a extra: branch=default extra: source=5c095ad7e90f871700f02dd1fa5012cb4498a2d4 description: 2 Graft out of order, skipping a merge and a duplicate $ hg graft 1 5 4 3 'merge()' 2 -n skipping ungraftable merge revision 6 skipping already grafted revision 2 grafting revision 1 grafting revision 5 grafting revision 4 grafting revision 3 $ hg graft 1 5 4 3 'merge()' 2 --debug skipping ungraftable merge revision 6 scanning for duplicate grafts skipping already grafted revision 2 grafting revision 1 searching for copies back to rev 1 unmatched files in local: b all copies found (* = to merge, ! = divergent): b -> a * checking for directory renames resolving manifests overwrite: False, partial: False ancestor: 68795b066622, local: d2e44c99fd3f+, remote: 5d205f8b35b6 b: local copied/moved to a -> m preserving b for resolve of b updating: b 1/1 files (100.00%) grafting revision 5 searching for copies back to rev 1 resolving manifests overwrite: False, partial: False ancestor: 4c60f11aa304, local: d2e44c99fd3f+, remote: 97f8bfe72746 e: remote is newer -> g updating: e 1/1 files (100.00%) getting e e grafting revision 4 searching for copies back to rev 1 resolving manifests overwrite: False, partial: False ancestor: 4c60f11aa304, local: 839a7e8fcf80+, remote: 9c233e8e184d e: versions differ -> m d: remote is newer -> g preserving e for resolve of e updating: d 1/2 files (50.00%) getting d updating: e 2/2 files (100.00%) picked tool 'internal:merge' for e (binary False symlink False) merging e my e@839a7e8fcf80+ other e@9c233e8e184d ancestor e@68795b066622 warning: conflicts during merge. merging e incomplete! (edit conflicts, then use 'hg resolve --mark') abort: unresolved conflicts, can't continue (use hg resolve and hg graft --continue) [255] Continue without resolve should fail: $ hg graft -c grafting revision 4 abort: unresolved merge conflicts (see hg help resolve) [255] Fix up: $ echo b > e $ hg resolve -m e Continue with a revision should fail: $ hg graft -c 6 abort: can't specify --continue and revisions [255] Continue for real, clobber usernames $ hg graft -c -U grafting revision 4 grafting revision 3 Compare with original: $ hg diff -r 6 $ hg status --rev 0:. -C M d M e A b a A c a R a View graph: $ hg --config extensions.graphlog= log -G --template '{author}@{rev}.{phase}: {desc}\n' @ test@10.draft: 3 | o test@9.draft: 4 | o test@8.draft: 5 | o foo@7.draft: 2 | | o test@6.secret: 6 | |\ | | o test@5.draft: 5 | | | | o | test@4.draft: 4 | |/ | o baz@3.public: 3 | | | o test@2.public: 2 | | | o bar@1.public: 1 |/ o test@0.public: 0 Graft again onto another branch should preserve the original source $ hg up -q 0 $ echo 'g'>g $ hg add g $ hg ci -m 7 created new head $ hg graft 7 grafting revision 7 $ hg log -r 7 --template '{rev}:{node}\n' 7:d2e44c99fd3f31c176ea4efb9eca9f6306c81756 $ hg log -r 2 --template '{rev}:{node}\n' 2:5c095ad7e90f871700f02dd1fa5012cb4498a2d4 $ hg log --debug -r tip changeset: 12:95adbe5de6b10f376b699ece9ed5a57cd7b4b0f6 tag: tip phase: draft parent: 11:b592ea63bb0c19a6c5c44685ee29a2284f9f1b8f parent: -1:0000000000000000000000000000000000000000 manifest: 12:9944044f82a462bbaccc9bdf7e0ac5b811db7d1b user: foo date: Thu Jan 01 00:00:00 1970 +0000 files+: b files-: a extra: branch=default extra: source=5c095ad7e90f871700f02dd1fa5012cb4498a2d4 description: 2 Disallow grafting an already grafted cset onto its original branch $ hg up -q 6 $ hg graft 7 skipping already grafted revision 7 (was grafted from 2) [255] Disallow grafting already grafted csets with the same origin onto each other $ hg up -q 12 $ hg graft 2 skipping already grafted revision 2 [255] $ hg graft 7 skipping already grafted revision 7 (same origin 2) [255] $ hg up -q 7 $ hg graft 2 skipping already grafted revision 2 [255] $ hg graft tip skipping already grafted revision 12 (same origin 2) [255]