You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
91 lines
3.1 KiB
91 lines
3.1 KiB
from pathlib import Path
|
|
|
|
from .exceptions import TransposeError
|
|
from .utils import check_path, create_cache, get_cache, move, remove, symlink
|
|
|
|
|
|
class Transpose:
|
|
def __init__(
|
|
self,
|
|
target_path: str,
|
|
store_path: str,
|
|
cache_filename: str = None,
|
|
) -> None:
|
|
self.target_path = Path(target_path)
|
|
self.store_path = Path(store_path)
|
|
|
|
if not cache_filename:
|
|
cache_filename = ".transpose.json"
|
|
self.cache_filename = cache_filename
|
|
self.cache_path = Path(self.target_path).joinpath(cache_filename)
|
|
|
|
def apply(self) -> None:
|
|
"""
|
|
Recreate the symlink from an existing cache file
|
|
"""
|
|
if not self.cache_path.exists():
|
|
raise TransposeError(
|
|
f"Cache file does not exist indicating target is not managed by Transpose: {self.cache_path}"
|
|
)
|
|
|
|
cache = get_cache(self.cache_path)
|
|
original_path = Path(cache["original_path"])
|
|
|
|
if original_path.is_symlink():
|
|
remove(original_path)
|
|
|
|
symlink(target_path=self.cache_path.parent, symlink_path=original_path)
|
|
|
|
def restore(self) -> None:
|
|
"""
|
|
Restores a previously Transpose managed directory to it's previous location.
|
|
"""
|
|
if not self.cache_path.exists():
|
|
raise TransposeError(
|
|
f"Cache file does not exist indicating target is not managed by Transpose: {self.cache_path}"
|
|
)
|
|
if not self.target_path.exists():
|
|
raise TransposeError(f"Target path does not exist: {self.target_path}")
|
|
|
|
cache = get_cache(self.cache_path)
|
|
original_path = Path(cache["original_path"])
|
|
|
|
if original_path.is_symlink():
|
|
remove(original_path)
|
|
elif original_path.exists():
|
|
raise TransposeError(
|
|
f"Original path in cache file already exists: {original_path}"
|
|
)
|
|
|
|
try:
|
|
move(source=self.target_path, destination=original_path)
|
|
except FileNotFoundError:
|
|
raise TransposeError(
|
|
f"Original path, {original_path}, does not exist. Use '-f' to create the path"
|
|
)
|
|
|
|
new_cache_path = Path(original_path).joinpath(self.cache_filename)
|
|
remove(new_cache_path)
|
|
|
|
def store(self, name: str) -> None:
|
|
"""
|
|
Moves a directory to a central location and creates a symlink to the old path.
|
|
"""
|
|
new_location = Path(self.store_path).joinpath(name)
|
|
|
|
if not check_path(path=self.target_path):
|
|
raise TransposeError(
|
|
f"Target path, {self.target_path}, does not exist. Cannot continue."
|
|
)
|
|
if check_path(path=new_location):
|
|
raise TransposeError(
|
|
f"Store path, {new_location}, already exists. Cannot continue."
|
|
)
|
|
|
|
create_cache(
|
|
cache_path=self.cache_path,
|
|
original_path=self.target_path,
|
|
)
|
|
|
|
move(source=self.target_path, destination=new_location)
|
|
symlink(target_path=new_location, symlink_path=self.target_path)
|