72 lines
2.3 KiB
Python
72 lines
2.3 KiB
Python
import os
|
|
import subprocess
|
|
import sys
|
|
from typing import Any, Callable, Generic, Optional, Text, TypeVar
|
|
T = TypeVar("T")
|
|
|
|
|
|
def rel_path_to_url(rel_path: Text, url_base: Text = "/") -> Text:
|
|
assert not os.path.isabs(rel_path), rel_path
|
|
if url_base[0] != "/":
|
|
url_base = "/" + url_base
|
|
if url_base[-1] != "/":
|
|
url_base += "/"
|
|
return url_base + rel_path.replace(os.sep, "/")
|
|
|
|
|
|
def from_os_path(path: Text) -> Text:
|
|
assert os.path.sep == "/" or sys.platform == "win32"
|
|
if "/" == os.path.sep:
|
|
rv = path
|
|
else:
|
|
rv = path.replace(os.path.sep, "/")
|
|
if "\\" in rv:
|
|
raise ValueError("path contains \\ when separator is %s" % os.path.sep)
|
|
return rv
|
|
|
|
|
|
def to_os_path(path: Text) -> Text:
|
|
assert os.path.sep == "/" or sys.platform == "win32"
|
|
if "\\" in path:
|
|
raise ValueError("normalised path contains \\")
|
|
if "/" == os.path.sep:
|
|
return path
|
|
return path.replace("/", os.path.sep)
|
|
|
|
|
|
def git(path: Text) -> Optional[Callable[..., Text]]:
|
|
def gitfunc(cmd: Text, *args: Text) -> Text:
|
|
full_cmd = ["git", cmd] + list(args)
|
|
try:
|
|
return subprocess.check_output(full_cmd, cwd=path, stderr=subprocess.STDOUT).decode('utf8')
|
|
except Exception as e:
|
|
if sys.platform == "win32" and isinstance(e, WindowsError):
|
|
full_cmd[0] = "git.bat"
|
|
return subprocess.check_output(full_cmd, cwd=path, stderr=subprocess.STDOUT).decode('utf8')
|
|
else:
|
|
raise
|
|
|
|
try:
|
|
# this needs to be a command that fails if we aren't in a git repo
|
|
gitfunc("rev-parse", "--show-toplevel")
|
|
except (subprocess.CalledProcessError, OSError):
|
|
return None
|
|
else:
|
|
return gitfunc
|
|
|
|
|
|
class cached_property(Generic[T]):
|
|
def __init__(self, func: Callable[[Any], T]) -> None:
|
|
self.func = func
|
|
self.__doc__ = getattr(func, "__doc__")
|
|
self.name = func.__name__
|
|
|
|
def __get__(self, obj: Any, cls: Optional[type] = None) -> T:
|
|
if obj is None:
|
|
return self # type: ignore
|
|
|
|
# we can unconditionally assign as next time this won't be called
|
|
assert self.name not in obj.__dict__
|
|
rv = obj.__dict__[self.name] = self.func(obj)
|
|
obj.__dict__.setdefault("__cached_properties__", set()).add(self.name)
|
|
return rv
|