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128 lines
3.9 KiB
128 lines
3.9 KiB
5 months ago
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import os
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import pygit2
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from fsspec.spec import AbstractFileSystem
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from .memory import MemoryFile
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class GitFileSystem(AbstractFileSystem):
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"""Browse the files of a local git repo at any hash/tag/branch
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(experimental backend)
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"""
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root_marker = ""
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cachable = True
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def __init__(self, path=None, fo=None, ref=None, **kwargs):
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"""
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Parameters
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----------
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path: str (optional)
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Local location of the repo (uses current directory if not given).
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May be deprecated in favour of ``fo``. When used with a higher
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level function such as fsspec.open(), may be of the form
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"git://[path-to-repo[:]][ref@]path/to/file" (but the actual
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file path should not contain "@" or ":").
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fo: str (optional)
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Same as ``path``, but passed as part of a chained URL. This one
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takes precedence if both are given.
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ref: str (optional)
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Reference to work with, could be a hash, tag or branch name. Defaults
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to current working tree. Note that ``ls`` and ``open`` also take hash,
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so this becomes the default for those operations
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kwargs
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"""
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super().__init__(**kwargs)
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self.repo = pygit2.Repository(fo or path or os.getcwd())
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self.ref = ref or "master"
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@classmethod
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def _strip_protocol(cls, path):
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path = super()._strip_protocol(path).lstrip("/")
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if ":" in path:
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path = path.split(":", 1)[1]
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if "@" in path:
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path = path.split("@", 1)[1]
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return path.lstrip("/")
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def _path_to_object(self, path, ref):
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comm, ref = self.repo.resolve_refish(ref or self.ref)
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parts = path.split("/")
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tree = comm.tree
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for part in parts:
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if part and isinstance(tree, pygit2.Tree):
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tree = tree[part]
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return tree
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@staticmethod
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def _get_kwargs_from_urls(path):
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if path.startswith("git://"):
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path = path[6:]
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out = {}
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if ":" in path:
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out["path"], path = path.split(":", 1)
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if "@" in path:
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out["ref"], path = path.split("@", 1)
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return out
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def ls(self, path, detail=True, ref=None, **kwargs):
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path = self._strip_protocol(path)
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tree = self._path_to_object(path, ref)
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if isinstance(tree, pygit2.Tree):
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out = []
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for obj in tree:
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if isinstance(obj, pygit2.Tree):
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out.append(
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{
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"type": "directory",
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"name": "/".join([path, obj.name]).lstrip("/"),
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"hex": obj.hex,
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"mode": f"{obj.filemode:o}",
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"size": 0,
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}
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)
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else:
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out.append(
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{
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"type": "file",
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"name": "/".join([path, obj.name]).lstrip("/"),
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"hex": obj.hex,
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"mode": f"{obj.filemode:o}",
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"size": obj.size,
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}
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)
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else:
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obj = tree
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out = [
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{
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"type": "file",
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"name": obj.name,
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"hex": obj.hex,
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"mode": f"{obj.filemode:o}",
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"size": obj.size,
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}
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]
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if detail:
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return out
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return [o["name"] for o in out]
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def ukey(self, path, ref=None):
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return self.info(path, ref=ref)["hex"]
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def _open(
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self,
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path,
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mode="rb",
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block_size=None,
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autocommit=True,
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cache_options=None,
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ref=None,
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**kwargs,
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):
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obj = self._path_to_object(path, ref or self.ref)
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return MemoryFile(data=obj.data)
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