feat: create libretime_shared package (#1349)

* feat: create libretime_shared package

- We don't use pydantic.BaseSettings because of some
  incompatble loading behavior.

* fix: whitelist pydantic in pylintrc

* docs: update to new BaseConfig behavior

* docs: change confusing config filepath

shared/tests/config_test.py

@@ -0,0 +1,72 @@
+from os import environ
+from unittest import mock
+
+from pytest import mark, raises
+
+from libretime_shared.config import BaseConfig, Database
+
+
+# pylint: disable=too-few-public-methods
+class FixtureConfig(BaseConfig):
+    api_key: str
+    database: Database
+
+
+FIXTURE_CONFIG_RAW = """
+api_key: "f3bf04fc"
+
+# Comment !
+database:
+    host: "localhost"
+    port: 5672
+
+ignored: "ignored"
+"""
+
+
+def test_base_config(tmpdir):
+    config_filepath = tmpdir.join("config.yml")
+    config_filepath.write(FIXTURE_CONFIG_RAW)
+
+    with mock.patch.dict(
+        environ,
+        dict(
+            LIBRETIME_API="invalid",
+            LIBRETIME_API_KEY="f3bf04fc",
+            LIBRETIME_DATABASE="invalid",
+            LIBRETIME_DATABASE_PORT="8888",
+            WRONGPREFIX_API_KEY="invalid",
+        ),
+    ):
+        config = FixtureConfig(filepath=config_filepath)
+
+        assert config.api_key == "f3bf04fc"
+        assert config.database.host == "localhost"
+        assert config.database.port == 8888
+
+
+FIXTURE_CONFIG_RAW_MISSING = """
+database:
+    host: "localhost"
+"""
+
+FIXTURE_CONFIG_RAW_INVALID = """
+database
+    host: "localhost"
+"""
+
+
+@mark.parametrize(
+    "raw,exception",
+    [
+        (FIXTURE_CONFIG_RAW_INVALID, SystemExit),
+        (FIXTURE_CONFIG_RAW_MISSING, SystemExit),
+    ],
+)
+def test_load_config_error(tmpdir, raw, exception):
+    config_filepath = tmpdir.join("config.yml")
+    config_filepath.write(raw)
+
+    with raises(exception):
+        with mock.patch.dict(environ, {}):
+            FixtureConfig(filepath=config_filepath)

shared/tests/logging_test.py

@@ -0,0 +1,47 @@
+from pathlib import Path
+
+import pytest
+from loguru import logger
+
+from libretime_shared.logging import (
+    create_task_logger,
+    level_from_verbosity,
+    setup_logger,
+)
+
+
+@pytest.mark.parametrize(
+    "verbosity,level_name,level_no",
+    [
+        (-100, "error", 40),
+        (-1, "error", 40),
+        (0, "warning", 30),
+        (1, "info", 20),
+        (2, "debug", 10),
+        (3, "trace", 5),
+        (100, "trace", 5),
+    ],
+)
+def test_level_from_verbosity(verbosity, level_name, level_no):
+    level = level_from_verbosity(verbosity)
+    assert level.name == level_name
+    assert level.no == level_no
+
+
+def test_setup_logger(tmp_path: Path):
+    log_filepath = tmp_path / "test.log"
+    extra_log_filepath = tmp_path / "extra.log"
+
+    setup_logger(1, log_filepath)
+
+    extra_logger = create_task_logger(2, extra_log_filepath, True)
+
+    logger.info("test info")
+    extra_logger.info("extra info")
+    logger.debug("test debug")
+
+    extra_logger.complete()
+    logger.complete()
+
+    assert len(log_filepath.read_text().splitlines()) == 1
+    assert len(extra_log_filepath.read_text().splitlines()) == 1