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|
# vfs.py
import os
import copy
class VirtualFileSystem:
def __init__(self, root_path=None, fs_data=None):
if fs_data is not None:
self.fs = fs_data
elif root_path and os.path.exists(root_path):
self.fs = self._load_from_path(root_path)
else:
self.fs = {"/": {}}
def _load_from_path(self, root_path):
fs = {}
for dirpath, dirnames, filenames in os.walk(root_path):
# Get the relative path from the root
rel_path = os.path.relpath(dirpath, root_path)
if rel_path == ".":
rel_path = ""
# Navigate to the correct node in the fs
parts = rel_path.split(os.sep)
node = fs
for part in parts:
if part:
node = node.setdefault(part, {})
# Add files
for filename in filenames:
try:
with open(os.path.join(dirpath, filename), 'r') as f:
node[filename] = f.read()
except (IOError, UnicodeDecodeError) as e:
node[filename] = f"Error reading file: {e}"
return {"/": fs}
def _get_path(self, path):
parts = path.strip("/").split("/")
node = self.fs["/"]
for part in parts:
if part == "":
continue
if isinstance(node, dict) and part in node:
node = node[part]
else:
return None
return node
def list_files(self, path="."):
if path == ".":
path = "/"
node = self._get_path(path)
if node is None or not isinstance(node, dict):
return "Path not found or not a directory."
return list(node.keys())
def create_file(self, file_path, content):
parts = file_path.strip("/").split("/")
filename = parts.pop()
if not filename:
return "Invalid file path."
dir_path = "/" + "/".join(parts)
node = self._get_path(dir_path)
if node is None or not isinstance(node, dict):
# Automatically create the directory if it doesn't exist.
node = self.fs["/"]
for part in parts:
if part == "":
continue
if part not in node:
node[part] = {}
node = node[part]
node[filename] = content
return f"File '{file_path}' created successfully."
def read_file(self, file_path):
node = self._get_path(file_path)
if node is None or isinstance(node, dict):
return "File not found or is a directory."
return node
def delete_file(self, file_path):
parts = file_path.strip("/").split("/")
filename = parts.pop()
if not filename:
return "Invalid file path."
dir_path = "/" + "/".join(parts)
node = self._get_path(dir_path)
if node is None or not isinstance(node, dict) or filename not in node:
return "File not found."
del node[filename]
return f"File '{file_path}' deleted successfully."
def print_fs(self, path="/", indent=0):
node = self._get_path(path)
if node is None:
return
for name, content in list(node.items()):
print(" " * indent + f"- {name}")
if isinstance(content, dict):
self.print_fs(f"{path}/{name}".replace("//", "/"), indent + 1)
class VFS:
_instance = None
@classmethod
def get_instance(cls, root_path=None, fs_data=None):
if cls._instance is None:
cls._instance = VirtualFileSystem(root_path, fs_data)
return cls._instance
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