pure: provide more correct implementation of posixfile for Windows
requires ctypes
Why is posixfile a class?
Because the implementation needs to use the Python library call os.fdopen [1],
which sets the 'name' attribute on the Python file object it creates to the
mostly meaningless string '<fdopen>', since file descriptors don't have a name.
But users of posixfile depend on the name attribute [2] being set to a proper
value, like Python's built-in 'open' function sets it on file objects.
Python file's name attribute is read-only, so we can't just assign to it after
the file object has alrady been created.
To solve this problem, we save the name of the file on a wrapper object,
and delegate the file function calls to the wrapped (private) file object
using __getattr__.
[1] http://docs.python.org/library/os.html#os.fdopen
[2] http://docs.python.org/library/stdtypes.html#file.name
$ hg init
$ echo foo > foo
should fail - foo is not managed
$ hg mv foo bar
foo: not copying - file is not managed
abort: no files to copy
[255]
$ hg st -A
? foo
$ hg add foo
dry-run; print a warning that this is not a real copy; foo is added
$ hg mv --dry-run foo bar
foo has not been committed yet, so no copy data will be stored for bar.
$ hg st -A
A foo
should print a warning that this is not a real copy; bar is added
$ hg mv foo bar
foo has not been committed yet, so no copy data will be stored for bar.
$ hg st -A
A bar
should print a warning that this is not a real copy; foo is added
$ hg cp bar foo
bar has not been committed yet, so no copy data will be stored for foo.
$ hg rm -f bar
$ rm bar
$ hg st -A
A foo
$ hg commit -m1
copy --after to a nonexistant target filename
$ hg cp -A foo dummy
foo: not recording copy - dummy does not exist
dry-run; should show that foo is clean
$ hg copy --dry-run foo bar
$ hg st -A
C foo
should show copy
$ hg copy foo bar
$ hg st -C
A bar
foo
shouldn't show copy
$ hg commit -m2
$ hg st -C
should match
$ hg debugindex foo
rev offset length base linkrev nodeid p1 p2
0 0 5 0 0 2ed2a3912a0b 000000000000 000000000000
$ hg debugrename bar
bar renamed from foo:2ed2a3912a0b24502043eae84ee4b279c18b90dd
$ echo bleah > foo
$ echo quux > bar
$ hg commit -m3
should not be renamed
$ hg debugrename bar
bar not renamed
$ hg copy -f foo bar
should show copy
$ hg st -C
M bar
foo
$ hg commit -m3
should show no parents for tip
$ hg debugindex bar
rev offset length base linkrev nodeid p1 p2
0 0 69 0 1 7711d36246cc 000000000000 000000000000
1 69 6 1 2 bdf70a2b8d03 7711d36246cc 000000000000
2 75 81 1 3 b2558327ea8d 000000000000 000000000000
should match
$ hg debugindex foo
rev offset length base linkrev nodeid p1 p2
0 0 5 0 0 2ed2a3912a0b 000000000000 000000000000
1 5 7 1 2 dd12c926cf16 2ed2a3912a0b 000000000000
$ hg debugrename bar
bar renamed from foo:dd12c926cf165e3eb4cf87b084955cb617221c17
should show no copies
$ hg st -C
copy --after on an added file
$ cp bar baz
$ hg add baz
$ hg cp -A bar baz
$ hg st -C
A baz
bar
foo was clean:
$ hg st -AC foo
C foo
but it's considered modified after a copy --after --force
$ hg copy -Af bar foo
$ hg st -AC foo
M foo
bar