view tests/test-up-local-change.t @ 50195:11e6eee4b063

transaction: use the standard transaction mechanism to backup branch

Branch is a bit special :
- It currently does not collaborate with the transaction (or any scoping) for
  writing (this is bad)
- It can change without the lock being taken (it is protected by `wlock`)

So we rely on the same mechanism as for the backup of the other dirstate file:
- we only do a backup if we hold the wlock
- we force a backup though the transaction


Since "branch" write does not collaborate with the transaction, we cannot back
it up "at the last minute" as we do for the dirstate. We have to back it up
"upfront". Since we have a backup, the transaction is no longer doing its
"quick_abort" and get noisy. Which is quite annoying. To work around this, and
to avoid jumping in yet-another-rabbit-hole of "getting branch written
properly", I am doing horrible things to the transaction in the meantime.
We should be able to get this code go away during the next cycle.

In the meantime, I prefer to take this small stop so that we stop abusing the
"journal" and "undo" mechanism instead of the proper backup mechanism of the
transaction.


Also note that this change regress the warning message for the legacy fallback
introduced in 2008 when issue902 got fixed in dd5a501cb97f (Mercurial 1.0).

I feel like this is fine as issue 902 remains fixed, and this would only affect
people deploying a mix of 15 year old Mercurial and modern mercurial, and using
branch and rollback extensively.

  $ HGMERGE=true; export HGMERGE

  $ hg init r1
  $ cd r1
  $ echo a > a
  $ hg addremove
  adding a
  $ hg commit -m "1"

  $ hg clone . ../r2
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd ../r2
  $ hg up
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo abc > a
  $ hg diff --nodates
  diff -r c19d34741b0a a
  --- a/a
  +++ b/a
  @@ -1,1 +1,1 @@
  -a
  +abc

  $ cd ../r1
  $ echo b > b
  $ echo a2 > a
  $ hg addremove
  adding b
  $ hg commit -m "2"

  $ cd ../r2
  $ hg -q pull ../r1
  $ hg status
  M a
  $ hg parents
  changeset:   0:c19d34741b0a
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     1
  
  $ hg --debug up
  resolving manifests
   branchmerge: False, force: False, partial: False
   ancestor: c19d34741b0a, local: c19d34741b0a+, remote: 1e71731e6fbb
   b: remote created -> g
  getting b
   preserving a for resolve of a
   a: versions differ -> m
  picked tool 'true' for a (binary False symlink False changedelete False)
  merging a
  my a@c19d34741b0a+ other a@1e71731e6fbb ancestor a@c19d34741b0a
  launching merge tool: true *$TESTTMP/r2/a* * * (glob)
  merge tool returned: 0
  1 files updated, 1 files merged, 0 files removed, 0 files unresolved
  $ hg parents
  changeset:   1:1e71731e6fbb
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
  $ hg --debug up 0
  starting 4 threads for background file closing (?)
  resolving manifests
   branchmerge: False, force: False, partial: False
   ancestor: 1e71731e6fbb, local: 1e71731e6fbb+, remote: c19d34741b0a
   b: other deleted -> r
  removing b
  starting 4 threads for background file closing (?)
   preserving a for resolve of a
   a: versions differ -> m
  picked tool 'true' for a (binary False symlink False changedelete False)
  merging a
  my a@1e71731e6fbb+ other a@c19d34741b0a ancestor a@1e71731e6fbb
  launching merge tool: true *$TESTTMP/r2/a* * * (glob)
  merge tool returned: 0
  0 files updated, 1 files merged, 1 files removed, 0 files unresolved
  $ hg parents
  changeset:   0:c19d34741b0a
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     1
  
  $ hg --debug up
  resolving manifests
   branchmerge: False, force: False, partial: False
   ancestor: c19d34741b0a, local: c19d34741b0a+, remote: 1e71731e6fbb
   b: remote created -> g
  getting b
   preserving a for resolve of a
   a: versions differ -> m
  picked tool 'true' for a (binary False symlink False changedelete False)
  merging a
  my a@c19d34741b0a+ other a@1e71731e6fbb ancestor a@c19d34741b0a
  launching merge tool: true *$TESTTMP/r2/a* * * (glob)
  merge tool returned: 0
  1 files updated, 1 files merged, 0 files removed, 0 files unresolved
  $ hg parents
  changeset:   1:1e71731e6fbb
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
  $ hg -v history
  changeset:   1:1e71731e6fbb
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  files:       a b
  description:
  2
  
  
  changeset:   0:c19d34741b0a
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  files:       a
  description:
  1
  
  
  $ hg diff --nodates
  diff -r 1e71731e6fbb a
  --- a/a
  +++ b/a
  @@ -1,1 +1,1 @@
  -a2
  +abc


create a second head

  $ cd ../r1
  $ hg up 0
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo b2 > b
  $ echo a3 > a
  $ hg addremove
  adding b
  $ hg commit -m "3"
  created new head

  $ cd ../r2
  $ hg -q pull ../r1
  $ hg status
  M a
  $ hg parents
  changeset:   1:1e71731e6fbb
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
  $ hg --debug up
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updated to "1e71731e6fbb: 2"
  1 other heads for branch "default"

test conflicting untracked files

  $ hg up -qC 0
  $ echo untracked > b
  $ hg st
  ? b
  $ hg up 1
  b: untracked file differs
  abort: untracked files in working directory differ from files in requested revision
  [20]
  $ rm b

test conflicting untracked ignored file

  $ hg up -qC 0
  $ echo ignored > .hgignore
  $ hg add .hgignore
  $ hg ci -m 'add .hgignore'
  created new head
  $ echo ignored > ignored
  $ hg add ignored
  $ hg ci -m 'add ignored file'

  $ hg up -q 'desc("add .hgignore")'
  $ echo untracked > ignored
  $ hg st
  $ hg up 'desc("add ignored file")'
  ignored: untracked file differs
  abort: untracked files in working directory differ from files in requested revision
  [20]

test a local add

  $ cd ..
  $ hg init a
  $ hg init b
  $ echo a > a/a
  $ echo a > b/a
  $ hg --cwd a commit -A -m a
  adding a
  $ cd b
  $ hg add a
  $ hg pull -u ../a
  pulling from ../a
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  new changesets cb9a9f314b8b
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg st

test updating backwards through a rename

  $ hg mv a b
  $ hg ci -m b
  $ echo b > b
  $ hg up -q 0
  $ hg st
  M a
  $ hg diff --nodates
  diff -r cb9a9f314b8b a
  --- a/a
  +++ b/a
  @@ -1,1 +1,1 @@
  -a
  +b

test for superfluous filemerge of clean files renamed in the past

  $ hg up -qC tip
  $ echo c > c
  $ hg add c
  $ hg up -qt:fail 0

  $ cd ..