06.01.14 12:38, Vajrasky Kok написав(ла):
This is related with ticket 19717: "resolve() fails when the path
doesn't exist".
Assuming /home/cutecat exists but not /home/cutecat/aa,
what is the desired output of
Path('/home/cutecat/aa/bb/cc').resolve(strict=False)?
Should it be:
"/home/cutecat" (the existed path only),
"/home/cutecat/aa" (the first non-existed path; my current strategy), or
"/home/cutecat/aa/bb/cc" (the default behaviour of os.path.realpath)?
The readlink command has three canonicalize modes
`-f'
`--canonicalize'
Activate canonicalize mode. If any component of the file name
except the last one is missing or unavailable, `readlink' produces
no output and exits with a nonzero exit code. A trailing slash is
ignored.
`-e'
`--canonicalize-existing'
Activate canonicalize mode. If any component is missing or
unavailable, `readlink' produces no output and exits with a
nonzero exit code. A trailing slash requires that the name
resolve to a directory.
`-m'
`--canonicalize-missing'
Activate canonicalize mode. If any component is missing or
unavailable, `readlink' treats it as a directory.
Behavior of os.path.realpath() is equivalent to --canonicalize-missing.
Current behavior of pathlib.Path.resolve() is equivalent to
--canonicalize-existing.
Behavior of --canonicalize-existing can be derived from --canonicalize,
just check that resulting patch exists. But other modes can't be derived
from --canonicalize-existing.
def resolve_existing(path):
path = path.resolve()
if not path.exists():
raise FileNotFoundError(errno.ENOENT, 'No such file or
directory: %r' % str(path))
return path
So perhaps two main modes should be --canonicalize (default) and
--canonicalize-missing (with missing=True)?
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