view tests/test-issue672.t @ 23511:acc73273b27e

fncache: document the fact fncache is outdate at hook run time

Using 'addfinalize' to generate 'fncache' means that no pending version of the
file will be generated for the hooks. We would have to use the
'addfilegenerator' method to get such result. However the 'fncachevfs' (who
decide that a write is necessary) have no access to the transaction to register
such file generation at add time. Having the transaction accessible to the 'vfs'
is too much trouble for no benefit. This outdated 'fncache' file at hook time is
not expected to be an issue.

The previous move from 'onclose' to 'addfinalize' had no impact on this timing.
I'm documenting it now because I looked at it.

http://mercurial.selenic.com/bts/issue672

# 0-2-4
#  \ \ \
#   1-3-5
#
# rename in #1, content change in #4.

  $ hg init

  $ touch 1
  $ touch 2
  $ hg commit -Am init  # 0
  adding 1
  adding 2

  $ hg rename 1 1a
  $ hg commit -m rename # 1

  $ hg co -C 0
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ echo unrelated >> 2
  $ hg ci -m unrelated1 # 2
  created new head

  $ hg merge --debug 1
    searching for copies back to rev 1
    unmatched files in other:
     1a
    all copies found (* = to merge, ! = divergent, % = renamed and deleted):
     src: '1' -> dst: '1a' 
    checking for directory renames
  resolving manifests
   branchmerge: True, force: False, partial: False
   ancestor: 81f4b099af3d, local: c64f439569a9+, remote: c12dcd37c90a
   1: other deleted -> r
  removing 1
  updating: 1 1/2 files (50.00%)
   1a: remote created -> g
  getting 1a
  updating: 1a 2/2 files (100.00%)
   2: remote unchanged -> k
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

  $ hg ci -m merge1 # 3

  $ hg co -C 2
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ echo hello >> 1
  $ hg ci -m unrelated2 # 4
  created new head

  $ hg co -C 3
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ hg merge -y --debug 4
    searching for copies back to rev 1
    unmatched files in local:
     1a
    all copies found (* = to merge, ! = divergent, % = renamed and deleted):
     src: '1' -> dst: '1a' *
    checking for directory renames
  resolving manifests
   branchmerge: True, force: False, partial: False
   ancestor: c64f439569a9, local: e327dca35ac8+, remote: 746e9549ea96
   preserving 1a for resolve of 1a
   1a: local copied/moved from 1 -> m
  updating: 1a 1/1 files (100.00%)
  picked tool 'internal:merge' for 1a (binary False symlink False)
  merging 1a and 1 to 1a
  my 1a@e327dca35ac8+ other 1@746e9549ea96 ancestor 1@81f4b099af3d
   premerge successful
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

  $ hg co -C 4
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ hg merge -y --debug 3
    searching for copies back to rev 1
    unmatched files in other:
     1a
    all copies found (* = to merge, ! = divergent, % = renamed and deleted):
     src: '1' -> dst: '1a' *
    checking for directory renames
  resolving manifests
   branchmerge: True, force: False, partial: False
   ancestor: c64f439569a9, local: 746e9549ea96+, remote: e327dca35ac8
   preserving 1 for resolve of 1a
  removing 1
   1a: remote moved from 1 -> m
  updating: 1a 1/1 files (100.00%)
  picked tool 'internal:merge' for 1a (binary False symlink False)
  merging 1 and 1a to 1a
  my 1a@746e9549ea96+ other 1a@e327dca35ac8 ancestor 1@81f4b099af3d
   premerge successful
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)