Add ability to install from CSV spec, and vacuum
Addition of vacuum closes #3
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parent
21865ee327
commit
0844604554
80
unpack.py
80
unpack.py
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@ -77,6 +77,21 @@ class _ResponseFile: # pylint: disable=too-few-public-methods
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return response
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def readline(self) -> bytes: # pylint: disable=missing-function-docstring
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try:
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while not b"\n" in self.buffer:
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self.buffer += next(self.iter)
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except StopIteration:
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pass
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if b"\n" == self.buffer:
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response, self.buffer = self.buffer.split(b"\n", 1)
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return response
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else:
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response = self.buffer
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self.buffer = b""
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return response
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def unpack(
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package: Union[BinaryIO, _ResponseFile], target: str
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@ -176,3 +191,68 @@ def uninstall(name: str, target: str, records: str) -> None:
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break
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os.remove(f"{records}/{name}")
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def _vacuum(root: str, delete_this: bool = False) -> None:
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try:
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for item in os.listdir(root):
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_vacuum(f"{root}/{item}", True)
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except NotADirectoryError:
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pass
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if delete_this:
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try:
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os.rmdir(root)
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except OSError:
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pass
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def vacuum(target: str, paths: Iterable[str] = ("lib",)) -> None:
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"""
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Remove empty directories under `paths`, each relative to `target`.
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"""
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for path in paths:
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_vacuum(f"{target}/{path}")
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def parse_spec(spec_text: str) -> dict[str, tuple[str, str]]:
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spec = {}
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for full_line in spec_text.split("\n"):
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line = full_line.strip()
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if line:
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name, version_hash, repo = line.split(",")
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spec[name] = (version_hash, repo)
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return spec
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def get_status(records: str) -> dict[str, str]:
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status = {}
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for name in os.listdir(records):
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with open(f"{records}/{name}", encoding="utf-8") as f:
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status[name] = f.readline().strip()
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return status
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def install_spec(
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spec_text: str, target: str, records: str, paths: Iterable[str] = ("lib",)
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) -> None:
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spec = parse_spec(spec_text)
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status = get_status(records)
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for name, version in status.items():
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if not name in spec or spec[name][0] != version:
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uninstall(name, target, records)
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vacuum(target, paths)
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status = get_status(records)
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for name, version_repo in spec.items():
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version, repo = version_repo
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if not name in status:
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install(name, version, repo, target, records)
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