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diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -58,6 +58,7 @@
lister.arch=swh.lister.arch:register
lister.aur=swh.lister.aur:register
lister.bitbucket=swh.lister.bitbucket:register
+ lister.bower=swh.lister.bower:register
lister.cgit=swh.lister.cgit:register
lister.cran=swh.lister.cran:register
lister.crates=swh.lister.crates:register
diff --git a/swh/lister/bower/__init__.py b/swh/lister/bower/__init__.py
new file mode 100644
--- /dev/null
+++ b/swh/lister/bower/__init__.py
@@ -0,0 +1,76 @@
+# 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
+
+
+"""
+Bower lister
+============
+
+The `Bower`_ lister list origins from its packages registry `registry.bower.io`_.
+
+Bower is a tool to manage Javascript packages.
+
+The registry provide an `http api`_ from where the lister retrieve package names
+and url.
+
+As of August 2022 `registry.bower.io`_ list 71028 package names.
+
+Note that even if the project is still maintained(security fixes, no new features), it is
+recommended to not use it anymore and prefer Yarn as a replacement since 2018.
+
+Origins retrieving strategy
+---------------------------
+
+To get a list of all package names we call `https://registry.bower.io/packages` endpoint.
+There is no other way for discovery (no archive index, no database dump, no dvcs repository).
+
+Page listing
+------------
+
+There is only one page that list all origins url.
+
+Origins from page
+-----------------
+
+The lister yields all origins url from one page. It is a list of package name and url.
+Origins url corresponds to Git repository url.
+Bower is supposed to support Svn repository too but on +/- 71000 urls I have only found 35
+urls that may not be Git repository.
+
+Running tests
+-------------
+
+Activate the virtualenv and run from within swh-lister directory::
+
+ pytest -s -vv --log-cli-level=DEBUG swh/lister/bower/tests
+
+Testing with Docker
+-------------------
+
+Change directory to swh/docker then launch the docker environment::
+
+ 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 bower
+
+.. _Bower: https://bower.io
+.. _registry.bower.io: https://registry.bower.io
+.. _http api: https://registry.bower.io/packages
+"""
+
+
+def register():
+ from .lister import BowerLister
+
+ return {
+ "lister": BowerLister,
+ "task_modules": ["%s.tasks" % __name__],
+ }
diff --git a/swh/lister/bower/lister.py b/swh/lister/bower/lister.py
new file mode 100644
--- /dev/null
+++ b/swh/lister/bower/lister.py
@@ -0,0 +1,91 @@
+# 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
+import logging
+from typing import Any, Dict, Iterator, List, Optional
+
+import requests
+from tenacity.before_sleep import before_sleep_log
+
+from swh.lister.utils import throttling_retry
+from swh.scheduler.interface import SchedulerInterface
+from swh.scheduler.model import ListedOrigin
+
+from .. import USER_AGENT
+from ..pattern import CredentialsType, StatelessLister
+
+logger = logging.getLogger(__name__)
+
+# Aliasing the page results returned by `get_pages` method from the lister.
+BowerListerPage = List[Dict[str, str]]
+
+
+class BowerLister(StatelessLister[BowerListerPage]):
+ """List Bower (Javascript package manager) origins."""
+
+ LISTER_NAME = "bower"
+ VISIT_TYPE = "bower"
+ INSTANCE = "bower"
+
+ API_URL = "https://registry.bower.io/packages"
+
+ def __init__(
+ self,
+ scheduler: SchedulerInterface,
+ credentials: Optional[CredentialsType] = None,
+ ):
+ super().__init__(
+ scheduler=scheduler,
+ credentials=credentials,
+ instance=self.INSTANCE,
+ url=self.API_URL,
+ )
+ self.session = requests.Session()
+ self.session.headers.update(
+ {
+ "Accept": "application/json",
+ "User-Agent": USER_AGENT,
+ }
+ )
+
+ @throttling_retry(before_sleep=before_sleep_log(logger, logging.WARNING))
+ def page_request(self, url: str, params: Dict[str, Any]) -> requests.Response:
+
+ logger.info("Fetching URL %s with params %s", url, params)
+
+ response = self.session.get(url, params=params)
+ if response.status_code != 200:
+ logger.warning(
+ "Unexpected HTTP status code %s on %s: %s",
+ response.status_code,
+ response.url,
+ response.content,
+ )
+ response.raise_for_status()
+
+ return response
+
+ def get_pages(self) -> Iterator[BowerListerPage]:
+ """Yield an iterator which returns 'page'
+
+ It uses the api endpoint provided by `https://registry.bower.io/packages`
+ to get a list of package names with an origin url that corresponds to Git
+ repository.
+
+ There is only one page that list all origins urls.
+ """
+ response = self.page_request(url=self.url, params={})
+ yield response.json()
+
+ def get_origins_from_page(self, page: BowerListerPage) -> Iterator[ListedOrigin]:
+ """Iterate on all pages and yield ListedOrigin instances."""
+ assert self.lister_obj.id is not None
+
+ for entry in page:
+ yield ListedOrigin(
+ lister_id=self.lister_obj.id,
+ visit_type=self.VISIT_TYPE,
+ url=entry["url"],
+ last_update=None,
+ )
diff --git a/swh/lister/bower/tasks.py b/swh/lister/bower/tasks.py
new file mode 100644
--- /dev/null
+++ b/swh/lister/bower/tasks.py
@@ -0,0 +1,19 @@
+# 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
+
+from celery import shared_task
+
+from swh.lister.bower.lister import BowerLister
+
+
+@shared_task(name=__name__ + ".BowerListerTask")
+def list_bower(**lister_args):
+ """Lister task for Bower (Javascript package manager) registry"""
+ return BowerLister.from_configfile(**lister_args).run().dict()
+
+
+@shared_task(name=__name__ + ".ping")
+def _ping():
+ return "OK"
diff --git a/swh/lister/bower/tests/__init__.py b/swh/lister/bower/tests/__init__.py
new file mode 100644
diff --git a/swh/lister/bower/tests/data/https_registry.bower.io/packages b/swh/lister/bower/tests/data/https_registry.bower.io/packages
new file mode 100644
--- /dev/null
+++ b/swh/lister/bower/tests/data/https_registry.bower.io/packages
@@ -0,0 +1,14 @@
+[
+ {
+ "name": "font-awesome",
+ "url": "https://github.com/FortAwesome/Font-Awesome.git"
+ },
+ {
+ "name": "redux",
+ "url": "https://github.com/reactjs/redux.git"
+ },
+ {
+ "name": "vue",
+ "url": "https://github.com/vuejs/vue.git"
+ }
+]
diff --git a/swh/lister/bower/tests/test_lister.py b/swh/lister/bower/tests/test_lister.py
new file mode 100644
--- /dev/null
+++ b/swh/lister/bower/tests/test_lister.py
@@ -0,0 +1,37 @@
+# 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
+from swh.lister.bower.lister import BowerLister
+
+expected_origins = [
+ {"name": "font-awesome", "url": "https://github.com/FortAwesome/Font-Awesome.git"},
+ {"name": "redux", "url": "https://github.com/reactjs/redux.git"},
+ {"name": "vue", "url": "https://github.com/vuejs/vue.git"},
+]
+
+
+def test_bower_lister(datadir, requests_mock_datadir, swh_scheduler):
+ lister = BowerLister(scheduler=swh_scheduler)
+ res = lister.run()
+
+ assert res.pages == 1
+ assert res.origins == 1 + 1 + 1
+
+ scheduler_origins = swh_scheduler.get_listed_origins(lister.lister_obj.id).results
+
+ assert len(scheduler_origins) == len(expected_origins)
+
+ assert {
+ (
+ scheduled.visit_type,
+ scheduled.url,
+ )
+ for scheduled in scheduler_origins
+ } == {
+ (
+ "bower",
+ expected["url"],
+ )
+ for expected in expected_origins
+ }
diff --git a/swh/lister/bower/tests/test_tasks.py b/swh/lister/bower/tests/test_tasks.py
new file mode 100644
--- /dev/null
+++ b/swh/lister/bower/tests/test_tasks.py
@@ -0,0 +1,31 @@
+# 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
+
+from swh.lister.pattern import ListerStats
+
+
+def test_bower_ping(swh_scheduler_celery_app, swh_scheduler_celery_worker):
+ res = swh_scheduler_celery_app.send_task("swh.lister.bower.tasks.ping")
+ assert res
+ res.wait()
+ assert res.successful()
+ assert res.result == "OK"
+
+
+def test_bower_lister(swh_scheduler_celery_app, swh_scheduler_celery_worker, mocker):
+ # setup the mocked BowerLister
+ lister = mocker.patch("swh.lister.bower.tasks.BowerLister")
+ lister.from_configfile.return_value = lister
+ stats = ListerStats(pages=42, origins=42)
+ lister.run.return_value = stats
+
+ res = swh_scheduler_celery_app.send_task("swh.lister.bower.tasks.BowerListerTask")
+ assert res
+ res.wait()
+ assert res.successful()
+ assert res.result == stats.dict()
+
+ lister.from_configfile.assert_called_once_with()
+ lister.run.assert_called_once_with()

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