# -*- coding: utf-8 -*-
#
# Copyright 2018-2020 - Swiss Data Science Center (SDSC)
# A partnership between École Polytechnique Fédérale de Lausanne (EPFL) and
# Eidgenössische Technische Hochschule Zürich (ETHZ).
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Client for handling datasets."""
import concurrent.futures
import os
import re
import shlex
import shutil
import tempfile
import time
import uuid
from collections import OrderedDict
from contextlib import contextmanager
from pathlib import Path
from subprocess import PIPE, SubprocessError, run
from urllib import error, parse
from urllib.parse import ParseResult
import attr
import patoolib
import requests
from git import GitCommandError, GitError, Repo
from wcmatch import glob
from renku.core import errors
from renku.core.management.clone import clone
from renku.core.management.config import RENKU_HOME
from renku.core.management.migrate import is_project_unsupported, migrate
from renku.core.models.datasets import (
Dataset,
DatasetFile,
DatasetTag,
generate_dataset_file_url,
is_dataset_name_valid,
)
from renku.core.models.git import GitURL
from renku.core.models.locals import with_reference
from renku.core.models.provenance.agents import Person
from renku.core.models.refs import LinkReference
from renku.core.utils.urls import remove_credentials
[docs]@attr.s
class DatasetsApiMixin(object):
"""Client for handling datasets."""
DATASETS = "datasets"
"""Directory for storing dataset metadata in Renku."""
POINTERS = "pointers"
"""Directory for storing external pointer files."""
CACHE = "cache"
"""Directory to cache transient data."""
@property
def renku_datasets_path(self):
"""Return a ``Path`` instance of Renku dataset metadata folder."""
return self.path / self.renku_home / self.DATASETS
@property
def renku_pointers_path(self):
"""Return a ``Path`` instance of Renku pointer files folder."""
path = self.path / self.renku_home / self.POINTERS
path.mkdir(exist_ok=True)
return path
[docs] def datasets_from_commit(self, commit=None):
"""Return datasets defined in a commit."""
commit = commit or self.repo.head.commit
try:
datasets = commit.tree / self.renku_home / self.DATASETS
except KeyError:
return
for tree in datasets:
try:
blob = tree / self.METADATA
except KeyError:
continue
dataset = Dataset.from_yaml(self.path / Path(blob.path), client=self)
dataset.commit = commit
yield dataset
@property
def datasets(self):
"""Return mapping from path to dataset."""
result = {}
paths = self.renku_datasets_path.rglob(self.METADATA)
for path in paths:
result[path] = self.load_dataset_from_path(path)
return result
[docs] def load_dataset_from_path(self, path, commit=None):
"""Return a dataset from a given path."""
path = Path(path)
if not path.is_absolute():
path = self.path / path
return Dataset.from_yaml(path, client=self, commit=commit)
[docs] def get_dataset_path(self, name):
"""Get dataset path from name."""
path = self.renku_datasets_path / name / self.METADATA
if not path.exists():
try:
path = LinkReference(client=self, name="datasets/" + name).reference
except errors.ParameterError:
return None
return path
[docs] def load_dataset(self, name=None):
"""Load dataset reference file."""
if name:
path = self.get_dataset_path(name)
if path and path.exists():
return self.load_dataset_from_path(path)
[docs] @contextmanager
def with_dataset(self, name=None, create=False):
"""Yield an editable metadata object for a dataset."""
dataset = self.load_dataset(name=name)
clean_up_required = False
if dataset is None:
if not create:
raise errors.DatasetNotFound(name=name)
clean_up_required = True
dataset, path, dataset_ref = self.create_dataset(name=name)
elif create:
raise errors.DatasetExistsError('Dataset exists: "{}".'.format(name))
dataset_path = self.path / self.data_dir / dataset.name
dataset_path.mkdir(parents=True, exist_ok=True)
try:
yield dataset
except Exception:
# TODO use a general clean-up strategy
# https://github.com/SwissDataScienceCenter/renku-python/issues/736
if clean_up_required:
dataset_ref.delete()
shutil.rmtree(path.parent, ignore_errors=True)
raise
dataset.to_yaml()
[docs] def create_dataset(
self, name=None, title=None, description=None, creators=None, keywords=None,
):
"""Create a dataset."""
if not name:
raise errors.ParameterError("Dataset name must be provided.")
if not is_dataset_name_valid(name):
raise errors.ParameterError('Dataset name "{}" is not valid.'.format(name))
if self.load_dataset(name=name):
raise errors.DatasetExistsError('Dataset exists: "{}".'.format(name))
if not title:
title = name
identifier = str(uuid.uuid4())
path = self.renku_datasets_path / identifier / self.METADATA
if path.exists():
raise errors.DatasetExistsError("Dataset with reference {} exists".format(path))
path.parent.mkdir(parents=True, exist_ok=True)
if creators is None:
creators = [Person.from_git(self.repo)]
keywords = keywords or ()
with with_reference(path):
dataset = Dataset(
client=self,
identifier=identifier,
name=name,
title=title,
description=description,
creators=creators,
keywords=keywords,
)
dataset_ref = LinkReference.create(client=self, name="datasets/" + name)
dataset_ref.set_reference(path)
dataset.path = Path(dataset.path).relative_to(self.path)
dataset.to_yaml()
return dataset, path, dataset_ref
[docs] def add_data_to_dataset(
self,
dataset,
urls,
force=False,
overwrite=False,
sources=(),
destination="",
ref=None,
external=False,
extract=False,
all_at_once=False,
destination_names=None,
progress=None,
):
"""Import the data into the data directory."""
messages = []
warning_messages = []
dataset_datadir = self.path / dataset.data_dir
destination = destination or Path(".")
destination = self._resolve_path(dataset_datadir, destination)
destination = self.path / dataset_datadir / destination
if destination.exists() and not destination.is_dir():
raise errors.ParameterError(f'Destination is not a directory: "{destination}"')
self.check_external_storage()
files = []
if all_at_once: # Importing a dataset
files = self._add_from_urls(
dataset=dataset,
urls=urls,
destination_names=destination_names,
destination=destination,
extract=extract,
progress=progress,
)
else:
for url in urls:
is_remote, is_git, url = _check_url(url)
if is_git and is_remote: # Remote git repo
sources = sources or ()
new_files = self._add_from_git(
dataset=dataset, url=url, sources=sources, destination=destination, ref=ref
)
else:
if sources:
raise errors.UsageError('Cannot use "--source" with URLs or local files.')
if not is_remote: # Local path, might be git
if is_git:
warning_messages.append(
"Adding data from local Git repository: "
+ "Use remote's Git URL instead to enable "
+ "lineage information and updates."
)
u = parse.urlparse(url)
new_files = self._add_from_local(
dataset=dataset, path=u.path, external=external, destination=destination
)
else: # Remote URL
new_files = self._add_from_url(
dataset=dataset, url=url, destination=destination, extract=extract, progress=progress
)
files.extend(new_files)
# Remove all files that are under a .git directory
paths_to_avoid = [f["path"] for f in files if ".git" in str(f["path"]).split(os.path.sep)]
if paths_to_avoid:
files = [f for f in files if f["path"] not in paths_to_avoid]
warning_messages.append(
"Ignored adding paths under a .git directory:\n " + "\n ".join(str(p) for p in paths_to_avoid)
)
files_to_commit = {str(self.path / f["path"]) for f in files}
if not force:
ignored_files = self.find_ignored_paths(*files_to_commit)
if ignored_files:
ignored_files = set(ignored_files)
files_to_commit = files_to_commit.difference(ignored_files)
ignored_sources = []
for file_ in files:
if str(self.path / file_["path"]) in ignored_files:
operation = file_.get("operation")
if operation:
src, _, _ = operation
ignored_sources.append(src)
else:
ignored_sources.append(file_["path"])
files = [f for f in files if str(self.path / f["path"]) in files_to_commit]
warning_messages.append(
"Theses paths are ignored by one of your .gitignore "
+ 'files (use "--force" flag if you really want to add '
+ "them):\n "
+ "\n ".join([str(p) for p in ignored_sources])
)
# all files at this point can be force-added
if not overwrite:
existing_files = dataset.find_files(files_to_commit)
if existing_files:
files_to_commit = files_to_commit.difference(existing_files)
files = [f for f in files if str(self.path / f["path"]) in files_to_commit]
warning_messages.append(
"These existing files were not overwritten "
+ '(use "--overwrite" flag to overwrite them):\n '
+ "\n ".join([str(p) for p in existing_files])
)
for data in files:
operation = data.pop("operation", None)
if not operation:
continue
src, dst, action = operation
# Remove existing file if any
self.remove_file(dst)
dst.parent.mkdir(parents=True, exist_ok=True)
if action == "copy":
shutil.copy(src, dst)
elif action == "move":
shutil.move(src, dst, copy_function=shutil.copy)
elif action == "symlink":
self._create_external_file(src, dst)
data["external"] = True
else:
raise errors.OperationError(f"Invalid action {action}")
# Track non-symlinks in LFS
if self.check_external_storage():
lfs_paths = self.track_paths_in_storage(*files_to_commit)
show_message = self.get_value("renku", "show_lfs_message")
if lfs_paths and (show_message is None or show_message == "True"):
messages.append(
(
"Adding these files to Git LFS:\n"
+ "\t{}".format("\n\t".join(lfs_paths))
+ "\nTo disable this message in the future, run:"
+ "\n\trenku config show_lfs_message False"
)
)
# Force-add to include possible ignored files
self.repo.git.add(*files_to_commit, force=True)
self.repo.git.add(self.renku_pointers_path, force=True)
staged_files = self.repo.index.diff("HEAD")
if staged_files:
msg = "renku dataset: committing {} newly added files".format(len(files_to_commit))
skip_hooks = not self.external_storage_requested
self.repo.index.commit(msg, skip_hooks=skip_hooks)
else:
warning_messages.append("No new file was added to project")
# Generate the DatasetFiles
dataset_files = []
for data in files:
data.setdefault("url", generate_dataset_file_url(client=self, filepath=str(data["path"])))
dataset_file = DatasetFile.from_revision(self, **data)
# Set dataset file path relative to root for submodules.
if dataset_file.client != self:
dataset_file.path = str(data["path"])
dataset_files.append(dataset_file)
dataset.update_files(dataset_files)
return warning_messages, messages
def _check_protected_path(self, path):
"""Checks if a path is a protected path."""
try:
path_in_repo = path.relative_to(self.path)
except ValueError:
return False
for protected_path in self.RENKU_PROTECTED_PATHS:
str_path = str(path_in_repo)
if re.match("^{}$".format(protected_path), str_path):
return True
return False
def _add_from_local(self, dataset, path, external, destination):
"""Add a file or directory from a local filesystem."""
src = Path(os.path.abspath(path))
if not src.exists():
raise errors.ParameterError(f"Cannot find file/directory: {path}")
dst = destination / src.name
# if we have a directory, recurse
if src.is_dir():
if dst.exists() and not dst.is_dir():
raise errors.ParameterError(f'Cannot copy directory to a file: "{dst}"')
if src == (self.path / dataset.data_dir).resolve():
raise errors.ParameterError(f"Cannot add dataset's data directory recursively: {path}")
if self._check_protected_path(src):
raise errors.ProtectedFiles([src])
files = []
for f in src.iterdir():
files.extend(
self._add_from_local(dataset=dataset, path=os.path.abspath(f), external=external, destination=dst)
)
return files
else:
# Check if file is in the project and return it
path_in_repo = None
if self._is_external_file(src):
path_in_repo = path
else:
try:
path_in_repo = src.relative_to(self.path)
except ValueError:
pass
else:
if self._check_protected_path(src):
raise errors.ProtectedFiles([src])
if path_in_repo:
return [{"path": path_in_repo, "source": path_in_repo, "parent": self}]
action = "symlink" if external else "copy"
return [
{
"path": dst.relative_to(self.path),
"source": os.path.relpath(str(src), str(self.path)),
"parent": self,
"operation": (src, dst, action),
}
]
def _add_from_urls(self, dataset, urls, destination, destination_names, extract, progress):
files = []
max_workers = min(os.cpu_count() - 1, 4) or 1
with concurrent.futures.ThreadPoolExecutor(max_workers) as executor:
futures = {
executor.submit(
self._add_from_url,
dataset=dataset,
url=url,
destination=destination,
extract=extract,
filename=name,
progress=progress,
)
for url, name in zip(urls, destination_names)
}
for future in concurrent.futures.as_completed(futures):
files.extend(future.result())
return files
def _add_from_url(self, dataset, url, destination, extract, filename=None, progress=None):
"""Process adding from url and return the location on disk."""
url = self._provider_check(url)
try:
start = time.time() * 1e3
tmp_root, paths = self._download(url=url, filename=filename, extract=extract, progress_class=progress)
exec_time = (time.time() * 1e3 - start) // 1e3
# If execution time was less or equal to zero seconds,
# block the thread a bit to avoid being rate limited.
if exec_time == 0:
time.sleep(min(os.cpu_count() - 1, 4) or 1)
except (requests.exceptions.HTTPError, error.HTTPError) as e: # pragma nocover
raise errors.OperationError("Cannot download from {}".format(url)) from e
paths = [(src, destination / src.relative_to(tmp_root)) for src in paths if not src.is_dir()]
return [
{
"operation": (src, dst, "move"),
"path": dst.relative_to(self.path),
"source": remove_credentials(url),
"parent": self,
}
for src, dst in paths
]
def _add_from_git(self, dataset, url, sources, destination, ref):
"""Process adding resources from another git repository."""
from renku import LocalClient
u = parse.urlparse(url)
sources = self._resolve_paths(u.path, sources)
# Get all files from repo that match sources
repo, repo_path = self.prepare_git_repo(url, ref)
files = set()
used_sources = set()
for file in repo.head.commit.tree.traverse():
path = file.path
result = self._get_src_and_dst(path, repo_path, sources, destination, used_sources)
if result:
files.add(result)
unused_sources = set(sources.keys()) - used_sources
if unused_sources:
unused_sources = {str(s) for s in unused_sources}
raise errors.ParameterError("No such file or directory", param_hint=unused_sources)
# Create metadata and move files to dataset
results = []
remote_client = LocalClient(repo_path)
# Pull files from LFS
paths = set()
for path, src, _ in files:
if src.is_dir():
continue
if src.is_symlink():
try:
path = str(src.resolve().relative_to(repo_path))
except ValueError: # External file
pass
paths.add(path)
self._fetch_lfs_files(repo_path, paths)
# Fetch metadata from Renku if any
paths = {f[0] for f in files}
metadata = self._fetch_files_metadata(remote_client, paths)
new_files = []
for path, src, dst in files:
if not src.is_dir():
# Use original metadata if it exists
based_on = metadata.get(path)
if based_on:
based_on.url = url
based_on.based_on = None
based_on.source = url
else:
based_on = DatasetFile.from_revision(remote_client, path=src, url=url, source=url)
path_in_dst_repo = dst.relative_to(self.path)
if path_in_dst_repo in new_files: # A path with the same destination is already copied
continue
new_files.append(path_in_dst_repo)
if remote_client._is_external_file(src):
operation = (src.resolve(), dst, "symlink")
else:
operation = (src, dst, "copy")
results.append(
{
"path": path_in_dst_repo,
"source": remove_credentials(url),
"parent": self,
"based_on": based_on,
"operation": operation,
}
)
return results
@staticmethod
def _ensure_dropbox(url):
"""Ensure dropbox url is set for file download."""
if not isinstance(url, ParseResult):
url = parse.urlparse(url)
query = url.query or ""
if "dl=0" in url.query:
query = query.replace("dl=0", "dl=1")
else:
query += "dl=1"
url = url._replace(query=query)
return url
def _provider_check(self, url):
"""Check additional provider related operations."""
# NOTE: Check if the url is a redirect.
r = requests.head(url, allow_redirects=True)
url = parse.urlparse(r.url)
if "dropbox.com" in url.netloc:
url = self._ensure_dropbox(url)
return parse.urlunparse(url)
def _resolve_paths(self, root_path, paths):
"""Check if paths are within a root path and resolve them."""
result = OrderedDict() # Used as an ordered-set
for path in paths:
r = self._resolve_path(root_path, path)
result[r] = None
return result
@staticmethod
def _resolve_path(root_path, path):
"""Check if a path is within a root path and resolve it."""
try:
root_path = Path(root_path).resolve()
path = os.path.abspath(root_path / path)
return Path(path).relative_to(root_path)
except ValueError:
raise errors.ParameterError("File {} is not within path {}".format(path, root_path))
@staticmethod
def _get_src_and_dst(path, repo_path, sources, dst_root, used_sources):
is_wildcard = False
matched_pattern = None
if not sources:
source = Path(".")
else:
source = None
for s in sources.keys():
try:
Path(path).relative_to(s)
except ValueError:
if glob.globmatch(path, str(s), flags=glob.GLOBSTAR):
is_wildcard = True
source = Path(path)
used_sources.add(s)
matched_pattern = str(s)
break
else:
source = Path(s)
used_sources.add(source)
break
if not source:
return
if is_wildcard:
# Search to see if a parent of the path matches the pattern and return it
while glob.globmatch(str(source.parent), matched_pattern, flags=glob.GLOBSTAR) and source != source.parent:
source = source.parent
src = repo_path / path
source_name = source.name
relative_path = Path(path).relative_to(source)
if src.is_dir() and is_wildcard:
sources[source] = None
used_sources.add(source)
dst = dst_root / source_name / relative_path
return path, src, dst
@staticmethod
def _fetch_lfs_files(repo_path, paths):
"""Fetch and checkout paths that are tracked by Git LFS."""
repo_path = str(repo_path)
try:
includes = ",".join(shlex.quote(p) for p in paths)
status = run(
["git", "lfs", "pull", "--include", includes], stderr=PIPE, cwd=repo_path, universal_newlines=True
)
if status.returncode != 0:
message = "\n\t".join(status.stderr.split("\n"))
raise errors.GitError(f"Cannot pull LFS objects from server: {message}")
except KeyboardInterrupt:
raise
except SubprocessError as e:
raise errors.GitError(f"Cannot pull LFS objects from server: {e}")
@staticmethod
def _fetch_files_metadata(client, paths):
"""Return metadata for files from paths."""
files = {}
if is_project_unsupported(client):
return files
migrate(client)
for _, dataset in client.datasets.items():
for file_ in dataset.files:
path = file_.path
if path in paths:
files[path] = file_
return files
[docs] def dataset_commits(self, dataset, max_results=None):
"""Gets the newest commit for a dataset or its files.
Commits are returned sorted from newest to oldest.
"""
paths = [(self.path / dataset.path / self.METADATA).resolve()]
paths.extend(self.path / f.path for f in dataset.files)
commits = self.repo.iter_commits(paths=paths, max_count=max_results)
return commits
[docs] def add_dataset_tag(self, dataset, tag, description="", force=False):
"""Adds a new tag to a dataset.
Validates if the tag already exists and that the tag follows
the same rules as docker tags.
See https://docs.docker.com/engine/reference/commandline/tag/
for a documentation of docker tag syntax.
:raises: errors.ParameterError
"""
if len(tag) > 128:
raise errors.ParameterError("Tags can be at most 128 characters long.")
if not re.match("^(?![.-])[a-zA-Z0-9_.-]{1,128}$", tag):
raise errors.ParameterError(
(
"Tag {} is invalid. \n"
"Only characters a-z, A-Z, 0-9, ., - and _ "
"are allowed. \nTag can't start with a . or -"
).format(tag)
)
if any(t for t in dataset.tags if t.name == tag):
if force:
# remove duplicate tag
dataset.tags = [t for t in dataset.tags if t.name != tag]
else:
raise errors.ParameterError("Tag {} already exists".format(tag))
latest_commit = list(self.dataset_commits(dataset, max_results=1))[0]
tag = DatasetTag(name=tag, description=description, commit=latest_commit.hexsha, dataset=dataset.title)
dataset.tags.append(tag)
return dataset
[docs] def update_dataset_files(self, files, ref, delete=False):
"""Update files and dataset metadata according to their remotes.
:param files: List of files to be updated
:param delete: Indicates whether to delete files or not
:return: List of files that should be deleted
"""
from renku import LocalClient
visited_repos = {}
updated_files = []
deleted_files = []
for file_ in files:
if not file_.based_on:
continue
file_.based_on = DatasetFile.from_jsonld(file_.based_on)
based_on = file_.based_on
url = based_on.source
if url in visited_repos:
repo, repo_path, remote_client = visited_repos[url]
else:
repo, repo_path = self.prepare_git_repo(url, ref)
remote_client = LocalClient(repo_path)
visited_repos[url] = repo, repo_path, remote_client
remote_file = self._fetch_file_metadata(remote_client, based_on.path)
if not remote_file:
try:
remote_file = DatasetFile.from_revision(
remote_client, path=based_on.path, source=None, added=based_on.added
)
except KeyError:
raise errors.ParameterError("Cannot find file {} in the repo {}".format(based_on.source, url))
commit_sha = self._get_commit_sha_from_label(based_on)
remote_commit_sha = self._get_commit_sha_from_label(remote_file)
if commit_sha != remote_commit_sha:
src = Path(repo.working_dir) / based_on.path
dst = self.renku_path.parent / file_.path
if src.exists():
# Fetch file is it is tracked by Git LFS
self._fetch_lfs_files(repo_path, {based_on.path})
if remote_client._is_external_file(src):
self.remove_file(dst)
self._create_external_file(src.resolve(), dst)
else:
shutil.copy(src, dst)
file_.based_on.commit = remote_file.commit
file_.based_on._label = file_.based_on.default_label()
file_.based_on._id = file_.based_on.default_id()
updated_files.append(file_)
else:
# File was removed or renamed
if delete:
self.remove_file(dst)
deleted_files.append(file_)
if not updated_files and (not delete or not deleted_files):
# Nothing to commit or update
return deleted_files
# Commit changes in files
file_paths = {str(self.path / f.path) for f in updated_files + deleted_files}
# Force-add to include possible ignored files that are in datasets
self.repo.git.add(*file_paths, force=True)
skip_hooks = not self.external_storage_requested
self.repo.index.commit(
"renku dataset: updated {} files and deleted {} files".format(len(updated_files), len(deleted_files)),
skip_hooks=skip_hooks,
)
# Update datasets' metadata
modified_datasets = {}
for file_ in updated_files:
new_file = DatasetFile.from_revision(
self, path=file_.path, based_on=file_.based_on, url=file_.url, source=file_.source
)
file_.dataset.update_files([new_file])
modified_datasets[file_.dataset.name] = file_.dataset
if delete:
for file_ in deleted_files:
file_.dataset.unlink_file(file_.path)
modified_datasets[file_.dataset.name] = file_.dataset
for dataset in modified_datasets.values():
dataset.to_yaml()
return deleted_files
def _create_external_file(self, src, dst):
"""Create a new external file."""
try:
pointer_file = self._create_pointer_file(target=src)
relative = os.path.relpath(pointer_file, dst.parent)
os.symlink(relative, dst)
except OSError as e:
raise errors.OperationError("Could not create symbolic link") from e
def _create_pointer_file(self, target, checksum=None):
"""Create a new pointer file."""
target = Path(target).resolve()
if checksum is None:
checksum = self._calculate_checksum(target)
while True:
filename = "{}-{}".format(uuid.uuid4(), checksum)
path = self.renku_pointers_path / filename
if not path.exists():
break
try:
os.symlink(target, path)
except FileNotFoundError:
raise errors.ParameterError("Cannot find external file {}".format(target))
return path
def _calculate_checksum(self, filepath):
try:
return self.repo.git.hash_object(str(filepath))
except GitCommandError:
return None
[docs] def update_external_files(self, records):
"""Update files linked to external storage."""
updated_files_paths = []
updated_datasets = {}
for file_ in records:
if file_.external:
path = self.path / file_.path
link = path.parent / os.readlink(path)
pointer_file = self.path / link
pointer_file = self._update_pointer_file(pointer_file)
if pointer_file is not None:
relative = os.path.relpath(pointer_file, path.parent)
os.remove(path)
os.symlink(relative, path)
updated_files_paths.append(str(path))
updated_datasets[file_.dataset.name] = file_.dataset
if not updated_files_paths:
return
self.repo.git.add(*updated_files_paths, force=True)
self.repo.git.add(self.renku_pointers_path, force=True)
commit = self.repo.index.commit("renku dataset: updated {} external files".format(len(updated_files_paths)))
for dataset in updated_datasets.values():
for file_ in dataset.files:
if str(self.path / file_.path) in updated_files_paths:
file_.commit = commit
file_._label = file_.default_label()
dataset.to_yaml()
def _update_pointer_file(self, pointer_file_path):
"""Update a pointer file."""
try:
target = pointer_file_path.resolve(strict=True)
except FileNotFoundError:
target = pointer_file_path.resolve()
raise errors.ParameterError("External file not found: {}".format(target))
checksum = self._calculate_checksum(target)
current_checksum = pointer_file_path.name.split("-")[-1]
if checksum == current_checksum:
return
os.remove(pointer_file_path)
return self._create_pointer_file(target, checksum=checksum)
[docs] @staticmethod
def remove_file(filepath):
"""Remove a file/symlink and its pointer file (for external files)."""
path = Path(filepath)
try:
link = path.parent / os.readlink(path)
except FileNotFoundError:
return
except OSError: # not a symlink but a normal file
os.remove(path)
return
os.remove(path)
try:
os.remove(link)
except FileNotFoundError:
pass
def _is_external_file(self, path):
"""Checks if a path within repo is an external file."""
if not Path(path).is_symlink() or not self._is_path_within_repo(path):
return False
pointer = os.readlink(path)
return f"{self.renku_home}/{self.POINTERS}" in pointer
[docs] def has_external_files(self):
"""Return True if project has external files."""
for dataset in self.datasets.values():
for file_ in dataset.files:
if file_.external:
return True
def _is_path_within_repo(self, path):
if not os.path.isabs(path):
path = os.path.abspath(path)
path = Path(path)
try:
path.relative_to(self.path)
except ValueError:
return False
else:
return True
[docs] def prepare_git_repo(self, url, ref=None):
"""Clone and cache a Git repo."""
if not url:
raise errors.GitError("Invalid URL.")
renku_branch = "renku-default-branch"
def checkout(repo, ref):
try:
repo.git.checkout(ref)
except GitCommandError:
raise errors.ParameterError('Cannot find reference "{}" in Git repository: {}'.format(ref, url))
ref = ref or renku_branch
u = GitURL.parse(url)
path = u.pathname
if u.hostname == "localhost":
path = str(Path(path).resolve())
url = path
repo_name = os.path.splitext(os.path.basename(path))[0]
path = os.path.dirname(path).lstrip("/")
repo_path = self.renku_path / self.CACHE / u.hostname / path / repo_name
if repo_path.exists():
repo = Repo(str(repo_path))
if repo.remotes.origin.url == url:
try:
repo.git.fetch(all=True)
repo.git.checkout(ref)
try:
repo.git.pull()
except GitError:
# When ref is not a branch, an error is thrown
pass
except GitError:
# ignore the error and try re-cloning
pass
else:
return repo, repo_path
try:
shutil.rmtree(str(repo_path))
except PermissionError:
raise errors.InvalidFileOperation("Cannot delete files in {}: Permission denied".format(repo_path))
repo = clone(url, path=str(repo_path), install_githooks=False)
# Because the name of the default branch is not always 'master', we
# create an alias of the default branch when cloning the repo. It
# is used to refer to the default branch later.
renku_ref = "refs/heads/" + renku_branch
try:
repo.git.execute(["git", "symbolic-ref", renku_ref, repo.head.reference.path])
checkout(repo, ref)
except GitCommandError as e:
raise errors.GitError("Cannot clone remote Git repo: {}".format(url)) from e
else:
return repo, repo_path
@staticmethod
def _fetch_file_metadata(client, path):
"""Return metadata for a single file."""
for _, dataset in client.datasets.items():
for file_ in dataset.files:
if file_.path == path:
return file_
@staticmethod
def _get_commit_sha_from_label(dataset_file):
label = dataset_file._label
if "@" in label:
return label.split("@")[1]
return label
def _download(self, url, filename, extract, progress_class=None, chunk_size=16384):
def extract_dataset(filepath):
"""Extract downloaded file."""
try:
tmp = tempfile.mkdtemp()
patoolib.extract_archive(str(filepath), outdir=tmp, verbosity=-1)
except patoolib.util.PatoolError:
return filepath.parent, [filepath]
else:
filepath.unlink()
return Path(tmp), [p for p in Path(tmp).rglob("*")]
tmp_root = self.renku_path / self.CACHE
tmp_root.mkdir(parents=True, exist_ok=True)
tmp = tempfile.mkdtemp(dir=tmp_root)
with requests.get(url, stream=True, allow_redirects=True) as request:
request.raise_for_status()
if not filename:
u = parse.urlparse(url)
filename = Path(u.path).name
if not filename:
raise errors.ParameterError(f"URL Cannot find a file to download from {url}")
download_to = Path(tmp) / filename
with open(str(download_to), "wb") as file_:
total_size = int(request.headers.get("content-length", 0))
progress_class = progress_class or DownloadProgressCallback
progress = progress_class(description=filename, total_size=total_size)
try:
for chunk in request.iter_content(chunk_size=chunk_size):
if chunk: # ignore keep-alive chunks
file_.write(chunk)
progress.update(size=len(chunk))
finally:
progress.finalize()
if extract:
return extract_dataset(download_to)
return download_to.parent, [download_to]
[docs]class DownloadProgressCallback:
"""Interface to report various stages of a download."""
def __init__(self, description, total_size):
"""Default initializer."""
[docs] def update(self, size):
"""Update the status."""
[docs] def finalize(self):
"""Called once when the download is finished."""
def _check_url(url):
"""Check if a url is local/remote and if it contains a git repository."""
u = parse.urlparse(url)
if u.scheme not in Dataset.SUPPORTED_SCHEMES:
raise errors.UrlSchemeNotSupported('Scheme "{}" not supported'.format(u.scheme))
is_remote = u.scheme not in ("", "file") or url.startswith("git@")
is_git = False
if is_remote:
is_git = u.path.endswith(".git")
if not is_git:
# NOTE: Check if the url is a redirect.
url = requests.head(url, allow_redirects=True).url
u = parse.urlparse(url)
else:
try:
Repo(u.path, search_parent_directories=True)
except GitError:
pass
else:
is_git = True
return is_remote, is_git, url
DATASET_METADATA_PATHS = [
Path(RENKU_HOME) / Path(DatasetsApiMixin.DATASETS),
Path(RENKU_HOME) / Path(DatasetsApiMixin.POINTERS),
Path(RENKU_HOME) / Path(LinkReference.REFS),
".gitattributes",
]