merge: do early copy to deal with issue636
Without copies/renames, merges source names are 1:1 with their
targets. Copies and renames introduce the possibility that there will
be two merges with the same input but different output. By doing the
copy to the destination name before the merge, the actual merge
becomes 1:1 again, and no source is the input to two different merges.
- add a preliminary scan to applyupdates to do copies
- for the merge action, pass the old name (for finding ancestors) and
the new name (for input to the merge) to filemerge
- eliminate the old post-merge copy
- lookup file contents from new name in filemerge
- pass new name to external merge helper
- report merge failure at new name
- add a test
% commit date test
abort: impossible time zone offset: 4444444
transaction abort!
rollback completed
abort: invalid date: '1\t15.1'
transaction abort!
rollback completed
abort: invalid date: 'foo bar'
transaction abort!
rollback completed
nothing changed
% partial commit test
trouble committing bar!
abort: No such file or directory: .../test/bar
adding dir/file
dir/file
adding dir.file
abort: no match under directory .../test/dir!
abort: no match under directory .../test/bleh!
abort: no match under directory .../test/dir2!
dir/file
does-not-exist: No such file or directory
abort: file .../test/does-not-exist not found!
abort: file .../test/baz not tracked!
abort: file .../test/quux not tracked!
dir/file
% partial subdir commit test
adding bar/bar
adding foo/foo
% subdir log 1
changeset: 0:6ef3cb06bb80
user: test
date: Mon Jan 12 13:46:40 1970 +0000
files: foo/foo
description:
commit-subdir-1
% subdir log 2
changeset: 1:f2e51572cf5a
tag: tip
user: test
date: Mon Jan 12 13:46:41 1970 +0000
files: bar/bar
description:
commit-subdir-2
% full log
changeset: 1:f2e51572cf5a
tag: tip
user: test
date: Mon Jan 12 13:46:41 1970 +0000
files: bar/bar
description:
commit-subdir-2
changeset: 0:6ef3cb06bb80
user: test
date: Mon Jan 12 13:46:40 1970 +0000
files: foo/foo
description:
commit-subdir-1
% dot and subdir commit test
% full log
changeset: 1:d9180e04fa8a
tag: tip
user: test
date: Sat Jan 24 03:33:20 1970 +0000
files: foo/plain-file
description:
commit-foo-dot
changeset: 0:80b572aaf098
user: test
date: Mon Jan 12 13:46:40 1970 +0000
files: foo/plain-file
description:
commit-foo-subdir
% subdir log
changeset: 1:d9180e04fa8a
tag: tip
user: test
date: Sat Jan 24 03:33:20 1970 +0000
summary: commit-foo-dot
changeset: 0:80b572aaf098
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: commit-foo-subdir