Source code for fsspec.implementations.github

import requests

from ..spec import AbstractFileSystem
from ..utils import infer_storage_options
from .memory import MemoryFile

# TODO: add GIST backend, would be very similar


[docs]class GithubFileSystem(AbstractFileSystem): """Interface to files in github An instance of this class provides the files residing within a remote github repository. You may specify a point in the repos history, by SHA, branch or tag (default is current master). Given that code files tend to be small, and that github does not support retrieving partial content, we always fetch whole files. When using fsspec.open, allows URIs of the form: - "github://path/file", in which case you must specify org, repo and may specify sha in the extra args - 'github://org:repo@/precip/catalog.yml', where the org and repo are part of the URI - 'github://org:repo@sha/precip/catalog.yml', where tha sha is also included ``sha`` can be the full or abbreviated hex of the commit you want to fetch from, or a branch or tag name (so long as it doesn't contain special characters like "/", "?", which would have to be HTTP-encoded). For authorised access, you must provide username and token, which can be made at https://github.com/settings/tokens """ url = "https://api.github.com/repos/{org}/{repo}/git/trees/{sha}" rurl = "https://raw.githubusercontent.com/{org}/{repo}/{sha}/{path}" protocol = "github"
[docs] def __init__(self, org, repo, sha=None, username=None, token=None, **kwargs): super().__init__(**kwargs) self.org = org self.repo = repo if (username is None) ^ (token is None): raise ValueError("Auth required both username and token") self.username = username self.token = token if sha is None: # look up default branch (not necessarily "master") u = "https://api.github.com/repos/{org}/{repo}" r = requests.get(u.format(org=org, repo=repo), **self.kw) r.raise_for_status() sha = r.json()["default_branch"] self.root = sha self.ls("")
@property def kw(self): if self.username: return {"auth": (self.username, self.token)} return {} @classmethod def repos(cls, org_or_user, is_org=True): """List repo names for given org or user This may become the top level of the FS Parameters ---------- org_or_user: str Name of the github org or user to query is_org: bool (default True) Whether the name is an organisation (True) or user (False) Returns ------- List of string """ r = requests.get( "https://api.github.com/{part}/{org}/repos".format( part=["users", "orgs"][is_org], org=org_or_user ) ) r.raise_for_status() return [repo["name"] for repo in r.json()] @property def tags(self): """Names of tags in the repo""" r = requests.get( "https://api.github.com/repos/{org}/{repo}/tags" "".format(org=self.org, repo=self.repo), **self.kw, ) r.raise_for_status() return [t["name"] for t in r.json()] @property def branches(self): """Names of branches in the repo""" r = requests.get( "https://api.github.com/repos/{org}/{repo}/branches" "".format(org=self.org, repo=self.repo), **self.kw, ) r.raise_for_status() return [t["name"] for t in r.json()] @property def refs(self): """Named references, tags and branches""" return {"tags": self.tags, "branches": self.branches} def ls(self, path, detail=False, sha=None, _sha=None, **kwargs): """List files at given path Parameters ---------- path: str Location to list, relative to repo root detail: bool If True, returns list of dicts, one per file; if False, returns list of full filenames only sha: str (optional) List at the given point in the repo history, branch or tag name or commit SHA _sha: str (optional) List this specific tree object (used internally to descend into trees) """ path = self._strip_protocol(path) if path == "": _sha = sha or self.root if _sha is None: parts = path.rstrip("/").split("/") so_far = "" _sha = sha or self.root for part in parts: out = self.ls(so_far, True, sha=sha, _sha=_sha) so_far += "/" + part if so_far else part out = [o for o in out if o["name"] == so_far] if not out: raise FileNotFoundError(path) out = out[0] if out["type"] == "file": if detail: return [out] else: return path _sha = out["sha"] if path not in self.dircache or sha not in [self.root, None]: r = requests.get( self.url.format(org=self.org, repo=self.repo, sha=_sha), **self.kw ) if r.status_code == 404: raise FileNotFoundError(path) r.raise_for_status() out = [ { "name": path + "/" + f["path"] if path else f["path"], "mode": f["mode"], "type": {"blob": "file", "tree": "directory"}[f["type"]], "size": f.get("size", 0), "sha": f["sha"], } for f in r.json()["tree"] ] if sha in [self.root, None]: self.dircache[path] = out else: out = self.dircache[path] if detail: return out else: return sorted([f["name"] for f in out]) def invalidate_cache(self, path=None): self.dircache.clear() @classmethod def _strip_protocol(cls, path): opts = infer_storage_options(path) if "username" not in opts: return super()._strip_protocol(path) return opts["path"].lstrip("/") @staticmethod def _get_kwargs_from_urls(path): opts = infer_storage_options(path) if "username" not in opts: return {} out = {"org": opts["username"], "repo": opts["password"]} if opts["host"]: out["sha"] = opts["host"] return out def _open( self, path, mode="rb", block_size=None, autocommit=True, cache_options=None, sha=None, **kwargs, ): if mode != "rb": raise NotImplementedError url = self.rurl.format( org=self.org, repo=self.repo, path=path, sha=sha or self.root ) r = requests.get(url, **self.kw) if r.status_code == 404: raise FileNotFoundError(path) r.raise_for_status() return MemoryFile(None, None, r.content)