dirstate.walk: don't keep track of normalized files in parallel
Rev 2bb13f2b778c changed the semantics of the work list to store (normalized,
non-normalized) pairs. All the tuple creation and destruction hurts perf: on a
large repo on OS X, 'hg status' went from 3.62 seconds to 3.78.
It also is unnecessary in most cases:
- it is clearly unnecessary on case-sensitive filesystems.
- it is also unnecessary when filenames have been read off of disk rather than
being supplied by the user.
The only case where the non-normalized case is required at all is when the file
is unknown.
To eliminate most of the perf cost, keep trace of whether the directory needs
to be normalized at all with a boolean called 'alreadynormed'. Pay the cost of
directory normalization only when necessary.
For the above large repo, 'hg status' goes to 3.63 seconds.
test that we don't interrupt the merge session if
a file-level merge failed
$ hg init repo
$ cd repo
$ echo foo > foo
$ echo a > bar
$ hg ci -Am 'add foo'
adding bar
adding foo
$ hg mv foo baz
$ echo b >> bar
$ echo quux > quux1
$ hg ci -Am 'mv foo baz'
adding quux1
$ hg up -qC 0
$ echo >> foo
$ echo c >> bar
$ echo quux > quux2
$ hg ci -Am 'change foo'
adding quux2
created new head
test with the rename on the remote side
$ HGMERGE=false hg merge
merging bar
merging bar failed!
merging foo and baz to baz
1 files updated, 1 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
[1]
$ hg resolve -l
U bar
R baz
test with the rename on the local side
$ hg up -C 1
3 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ HGMERGE=false hg merge
merging bar
merging bar failed!
merging baz and foo to baz
1 files updated, 1 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
[1]
show unresolved
$ hg resolve -l
U bar
R baz
unmark baz
$ hg resolve -u baz
show
$ hg resolve -l
U bar
U baz
$ hg st
M bar
M baz
M quux2
? bar.orig
re-resolve baz
$ hg resolve baz
merging baz and foo to baz
after resolve
$ hg resolve -l
U bar
R baz
resolve all warning
$ hg resolve
abort: no files or directories specified
(use --all to remerge all files)
[255]
resolve all
$ hg resolve -a
merging bar
warning: conflicts during merge.
merging bar incomplete! (edit conflicts, then use 'hg resolve --mark')
[1]
after
$ hg resolve -l
U bar
R baz
$ cd ..