Differential D8663 Diff 31865 swh/lister/hackage/lister.py

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swh/lister/hackage/lister.py

# Copyright (C) 2022 The Software Heritage developers		# Copyright (C) 2022 The Software Heritage developers
# See the AUTHORS file at the top-level directory of this distribution		# See the AUTHORS file at the top-level directory of this distribution
# License: GNU General Public License version 3, or any later version		# License: GNU General Public License version 3, or any later version
# See top-level LICENSE file for more information		# See top-level LICENSE file for more information

		from dataclasses import dataclass
		from datetime import datetime, timezone
import logging		import logging
from typing import Any, Dict, Iterator, List, Optional		from typing import Any, Dict, Iterator, List, Optional

import iso8601		import iso8601

from swh.scheduler.interface import SchedulerInterface		from swh.scheduler.interface import SchedulerInterface
from swh.scheduler.model import ListedOrigin		from swh.scheduler.model import ListedOrigin

from ..pattern import CredentialsType, StatelessLister		from ..pattern import CredentialsType, Lister

logger = logging.getLogger(__name__)		logger = logging.getLogger(__name__)

# Aliasing the page results returned by `get_pages` method from the lister.		# Aliasing the page results returned by `get_pages` method from the lister.
HackageListerPage = List[Dict[str, Any]]		HackageListerPage = List[Dict[str, Any]]


class HackageLister(StatelessLister[HackageListerPage]):		@dataclass
		class HackageListerState:
		"""Store lister state for incremental mode operations"""

		last_listing_date: Optional[datetime] = None
		"""Last date when Hackage lister was executed"""


		class HackageLister(Lister[HackageListerState, HackageListerPage]):
"""List Hackage (The Haskell Package Repository) origins."""		"""List Hackage (The Haskell Package Repository) origins."""

LISTER_NAME = "hackage"		LISTER_NAME = "hackage"
VISIT_TYPE = "hackage"		VISIT_TYPE = "hackage"
INSTANCE = "hackage"		INSTANCE = "hackage"

BASE_URL = "https://hackage.haskell.org/"		BASE_URL = "https://hackage.haskell.org/"
PACKAGE_NAMES_URL_PATTERN = "{base_url}packages/search"		PACKAGE_NAMES_URL_PATTERN = "{base_url}packages/search"
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scheduler=scheduler,		scheduler=scheduler,
credentials=credentials,		credentials=credentials,
instance=self.INSTANCE,		instance=self.INSTANCE,
url=url if url else self.BASE_URL,		url=url if url else self.BASE_URL,
)		)
# Ensure to set this with same value as the http api search endpoint use		# Ensure to set this with same value as the http api search endpoint use
# (50 as of august 2022)		# (50 as of august 2022)
self.page_size: int = 50		self.page_size: int = 50
		self.listing_date = datetime.now().astimezone(tz=timezone.utc)

		def state_from_dict(self, d: Dict[str, Any]) -> HackageListerState:
		last_listing_date = d.get("last_listing_date")
		if last_listing_date is not None:
		d["last_listing_date"] = iso8601.parse_date(last_listing_date)
		return HackageListerState(**d)

		def state_to_dict(self, state: HackageListerState) -> Dict[str, Any]:
		d: Dict[str, Optional[str]] = {"last_listing_date": None}
		last_listing_date = state.last_listing_date
		if last_listing_date is not None:
		d["last_listing_date"] = last_listing_date.isoformat()
		return d

def get_pages(self) -> Iterator[HackageListerPage]:		def get_pages(self) -> Iterator[HackageListerPage]:
"""Yield an iterator which returns 'page'		"""Yield an iterator which returns 'page'

It uses the http api endpoint `https://hackage.haskell.org/packages/search`		It uses the http api endpoint `https://hackage.haskell.org/packages/search`
to get a list of package names from which we build an origin url.		to get a list of package names from which we build an origin url.

Results are paginated.		Results are paginated.
"""		"""
		# Search query
		sq = "(deprecated:any)"

		if self.state.last_listing_date:
		last_str = (
		self.state.last_listing_date.astimezone(tz=timezone.utc)
		.date()
		.isoformat()
		)

		# Incremental mode search query
		sq += "(lastUpload >= %s)" % last_str

params = {		params = {
"page": 0,		"page": 0,
"sortColumn": "default",		"sortColumn": "default",
"sortDirection": "ascending",		"sortDirection": "ascending",
"searchQuery": "(deprecated:any)",		"searchQuery": sq,
}		}

data = self.http_request(		data = self.http_request(
url=self.PACKAGE_NAMES_URL_PATTERN.format(base_url=self.url),		url=self.PACKAGE_NAMES_URL_PATTERN.format(base_url=self.url),
method="POST",		method="POST",
json=params,		json=params,
).json()		).json()

		if data.get("pageContents"):
nb_entries: int = data["numberOfResults"]		nb_entries: int = data["numberOfResults"]
(nb_pages, remainder) = divmod(nb_entries, self.page_size)		(nb_pages, remainder) = divmod(nb_entries, self.page_size)
if remainder:		if remainder:
nb_pages += 1		nb_pages += 1
		# First page
yield data["pageContents"]		yield data["pageContents"]
		# Next pages
for page in range(1, nb_pages):		for page in range(1, nb_pages):
params["page"] = page		params["page"] = page
data = self.http_request(		data = self.http_request(
url=self.PACKAGE_NAMES_URL_PATTERN.format(base_url=self.url),		url=self.PACKAGE_NAMES_URL_PATTERN.format(base_url=self.url),
method="POST",		method="POST",
json=params,		json=params,
).json()		).json()
yield data["pageContents"]		yield data["pageContents"]

def get_origins_from_page(self, page: HackageListerPage) -> Iterator[ListedOrigin]:		def get_origins_from_page(self, page: HackageListerPage) -> Iterator[ListedOrigin]:
"""Iterate on all pages and yield ListedOrigin instances."""		"""Iterate on all pages and yield ListedOrigin instances."""
assert self.lister_obj.id is not None		assert self.lister_obj.id is not None

for entry in page:		for entry in page:
pkgname = entry["name"]["display"]		pkgname = entry["name"]["display"]
last_update = iso8601.parse_date(entry["lastUpload"])		last_update = iso8601.parse_date(entry["lastUpload"])
url = self.PACKAGE_INFO_URL_PATTERN.format(		url = self.PACKAGE_INFO_URL_PATTERN.format(
base_url=self.url, pkgname=pkgname		base_url=self.url, pkgname=pkgname
)		)

yield ListedOrigin(		yield ListedOrigin(
lister_id=self.lister_obj.id,		lister_id=self.lister_obj.id,
visit_type=self.VISIT_TYPE,		visit_type=self.VISIT_TYPE,
url=url,		url=url,
last_update=last_update,		last_update=last_update,
)		)

		def finalize(self) -> None:
		self.state.last_listing_date = self.listing_date
		self.updated = True