Differential D8517 Diff 30752 swh/lister/conda/__init__.py

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swh/lister/conda/init.py

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


				"""
				Conda lister
				============

				Anaconda is a package manager that provides tooling for datascience.

				The Conda lister list `packages`_ from Anaconda `repositories`_.
				Those repositories host packages for several languages (Python, R) operating systems
				and architecture.
				Packages are grouped within free or commercial `channels`_.

				To instantiate a conda lister we need to give some `channel`and `arch` arguments::

				lister = CondaLister(
				scheduler=swh_scheduler, channel="free", archs=["linux-64", "osx-64", "win-64"]
				)

				The default `url` value of lister is `https://repo.anaconda.com/pkgs`. One can set another
				repository url, for example::

				lister = CondaLister(
				scheduler=swh_scheduler,
				url="https://conda.anaconda.org",
				channel="conda-forge",
				archs=["linux-64"],
				)

				Origins retrieving strategy
				---------------------------

				Each channel provides several `repodata.json`_ files that list available packages
				and related versions.

				Given a channel and a list of system and architecture the lister download and parse
				corresponding repodata.json.

				We use bz2 compressed version of repodata.json. See for example `main/linux-64`_ page
				to view available repodata files.

				Page listing
				------------

				The lister returns one page per channel / architecture that list all available package
				versions.

				Origins from page
				-----------------

				Origins urls are built following this pattern `https://anaconda.org/{channel}/{pkgname}`.
				Each origin is yield with an `artifacts` entry in `extra_loader_arguments` that list
				artifact metadata for each archived package version.

				Origin data example for one origin with two related versions.::

				{
				"url": "https://anaconda.org/conda-forge/lifetimes",
				"artifacts": {
				"linux-64/0.11.1-py36h9f0ad1d_1": {
				"url": "https://conda.anaconda.org/conda-forge/linux-64/lifetimes-0.11.1-py36h9f0ad1d_1.tar.bz2", # noqa: B950
				"date": "2020-07-06T12:19:36.425000+00:00",
				"version": "0.11.1",
				"filename": "lifetimes-0.11.1-py36h9f0ad1d_1.tar.bz2",
				"checksums": {
				"md5": "faa398f7ba0d60ce44aa6eeded490cee",
				"sha256": "f82a352dfae8abceeeaa538b220fd9c5e4aa4e59092a6a6cea70b9ec0581ea03", # noqa: B950
				},
				},
				"linux-64/0.11.1-py36hc560c46_1": {
				"url": "https://conda.anaconda.org/conda-forge/linux-64/lifetimes-0.11.1-py36hc560c46_1.tar.bz2", # noqa: B950
				"date": "2020-07-06T12:19:37.032000+00:00",
				"version": "0.11.1",
				"filename": "lifetimes-0.11.1-py36hc560c46_1.tar.bz2",
				"checksums": {
				"md5": "c53a689a4c5948e84211bdfc23e3fe68",
				"sha256": "76146c2ebd6e3b65928bde53a2585287759d77beba785c0eeb889ee565c0035d", # noqa: B950
				},
				},
				},
				}

				Running tests
				-------------

				Activate the virtualenv and run from within swh-lister directory::

				pytest -s -vv --log-cli-level=DEBUG swh/lister/conda/tests

				Testing with Docker
				-------------------

				Change directory to swh/docker then launch the docker environment::

				docker-compose up -d
				anlambertUnsubmitted Done Inline Actions We now use docker compose v2, command should now be: `docker compose up -d` anlambert: We now use docker compose v2, command should now be: `docker compose up -d`

				Then connect to the lister::

				docker exec -it docker_swh-lister_1 bash

				And run the lister (The output of this listing results in “oneshot” tasks in the scheduler)::

				swh lister run -l conda channel="free" archs='["linux-64", "osx-64", "win-64"]'
				anlambertUnsubmitted Done Inline Actions This should be the preferred way to execute a lister through docker. Then schedule a conda listing task:: docker compose exec swh-scheduler swh scheduler task add -p oneshot list-conda channel="free" archs="[linux-64, osx-64, win-64]" You can follow lister execution by displaying logs of swh-lister service:: docker compose logs -f swh-lister anlambert: This should be the preferred way to execute a lister through docker. ``` Then schedule a conda…

				.. _packages: https://docs.anaconda.com/anaconda/packages/pkg-docs/
				.. _Anaconda: https://anaconda.com/
				.. _repositories: https://repo.anaconda.com/pkgs/
				.. _channels: https://docs.anaconda.com/anaconda/user-guide/tasks/using-repositories/
				.. _main/linux-64: https://repo.anaconda.com/pkgs/main/linux-64/
				.. _repodata.json: https://repo.anaconda.com/pkgs/free/linux-64/repodata.json
				"""


				def register():
				from .lister import CondaLister

				return {
				"lister": CondaLister,
				"task_modules": ["%s.tasks" % __name__],
				}