cli: add global --no-cache option

docs/cli.md

@@ -27,6 +27,8 @@ then `--help` combined with any of those can give you more information.
 * `--no-ansi`: Disable ANSI output.
 * `--version (-V)`: Display this application version.
 * `--no-interaction (-n)`: Do not ask any interactive question.
+* `--no-plugins`: Disables plugins.
+* `--no-cache`: Disables Poetry source caches.
 
 
 ## new

src/poetry/console/application.py

@@ -96,6 +96,7 @@ def __init__(self) -> None:
         self._poetry: Poetry | None = None
         self._io: IO | None = None
         self._disable_plugins = False
+        self._disable_cache = False
         self._plugins_loaded = False
 
         dispatcher = EventDispatcher()
@@ -117,7 +118,10 @@ def poetry(self) -> Poetry:
             return self._poetry
 
         self._poetry = Factory().create_poetry(
-            Path.cwd(), io=self._io, disable_plugins=self._disable_plugins
+            Path.cwd(),
+            io=self._io,
+            disable_plugins=self._disable_plugins,
+            disable_cache=self._disable_cache,
         )
 
         return self._poetry
@@ -168,6 +172,7 @@ def render_error(self, error: Exception, io: IO) -> None:
 
     def _run(self, io: IO) -> int:
         self._disable_plugins = io.input.parameter_option("--no-plugins")
+        self._disable_cache = io.input.has_parameter_option("--no-cache")
 
         self._load_plugins(io)
 
@@ -347,6 +352,12 @@ def _default_definition(self) -> Definition:
             Option("--no-plugins", flag=True, description="Disables plugins.")
         )
 
+        definition.add_option(
+            Option(
+                "--no-cache", flag=True, description="Disables Poetry source caches."
+            )
+        )
+
         return definition
 
     def _get_solution_provider_repository(self) -> SolutionProviderRepository:

src/poetry/factory.py

@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+import logging
+
 from pathlib import Path
 from typing import TYPE_CHECKING
 from typing import Any
@@ -27,6 +29,9 @@
     from poetry.repositories.legacy_repository import LegacyRepository
 
 
+logger = logging.getLogger(__name__)
+
+
 class Factory(BaseFactory):
     """
     Factory class to create various elements needed by Poetry.
@@ -37,6 +42,7 @@ def create_poetry(
         cwd: Path | None = None,
         io: IO | None = None,
         disable_plugins: bool = False,
+        disable_cache: bool = False,
     ) -> Poetry:
         if io is None:
             io = NullIO()
@@ -79,7 +85,11 @@ def create_poetry(
 
         # Configuring sources
         self.configure_sources(
-            poetry, poetry.local_config.get("source", []), config, io
+            poetry,
+            poetry.local_config.get("source", []),
+            config,
+            io,
+            disable_cache=disable_cache,
         )
 
         plugin_manager = PluginManager(Plugin.group, disable_plugins=disable_plugins)
@@ -127,10 +137,20 @@ def create_config(cls, io: IO | None = None) -> Config:
 
     @classmethod
     def configure_sources(
-        cls, poetry: Poetry, sources: list[dict[str, str]], config: Config, io: IO
+        cls,
+        poetry: Poetry,
+        sources: list[dict[str, str]],
+        config: Config,
+        io: IO,
+        disable_cache: bool = False,
     ) -> None:
+        if disable_cache:
+            logger.debug("Disabling source caches")
+
         for source in sources:
-            repository = cls.create_legacy_repository(source, config)
+            repository = cls.create_legacy_repository(
+                source, config, disable_cache=disable_cache
+            )
             is_default = bool(source.get("default", False))
             is_secondary = bool(source.get("secondary", False))
             if io.is_debug():
@@ -154,11 +174,13 @@ def configure_sources(
             from poetry.repositories.pypi_repository import PyPiRepository
 
             default = not poetry.pool.has_primary_repositories()
-            poetry.pool.add_repository(PyPiRepository(), default, not default)
+            poetry.pool.add_repository(
+                PyPiRepository(disable_cache=disable_cache), default, not default
+            )
 
     @classmethod
     def create_legacy_repository(
-        cls, source: dict[str, str], auth_config: Config
+        cls, source: dict[str, str], auth_config: Config, disable_cache: bool = False
     ) -> LegacyRepository:
         from poetry.repositories.legacy_repository import LegacyRepository
         from poetry.utils.helpers import get_cert
@@ -179,6 +201,7 @@ def create_legacy_repository(
             config=auth_config,
             cert=get_cert(auth_config, name),
             client_cert=get_client_cert(auth_config, name),
+            disable_cache=disable_cache,
         )
 
     @classmethod

tests/console/commands/plugin/conftest.py

@@ -37,7 +37,11 @@ def installed() -> InstalledRepository:
 
 def configure_sources_factory(repo: TestRepository) -> SourcesFactory:
     def _configure_sources(
-        poetry: Poetry, sources: Source, config: Config, io: IO
+        poetry: Poetry,
+        sources: Source,
+        config: Config,
+        io: IO,
+        disable_cache: bool = False,
     ) -> None:
         pool = Pool()
         pool.add_repository(repo)

tests/console/test_application.py

@@ -4,6 +4,8 @@
 
 from typing import TYPE_CHECKING
 
+import pytest
+
 from cleo.testers.application_tester import ApplicationTester
 from entrypoints import EntryPoint
 
@@ -108,3 +110,23 @@ def test_application_execute_plugin_command_with_plugins_disabled(
     assert tester.io.fetch_output() == ""
     assert tester.io.fetch_error() == '\nThe command "foo" does not exist.\n'
     assert tester.status_code == 1
+
+
+@pytest.mark.parametrize("disable_cache", [True, False])
+def test_application_verify_source_cache_flag(disable_cache: bool):
+    app = Application()
+
+    tester = ApplicationTester(app)
+    command = "debug info"
+
+    if disable_cache:
+        command = f"{command} --no-cache"
+
+    assert not app._poetry
+
+    tester.execute(command)
+
+    assert app.poetry.pool.repositories
+
+    for repo in app.poetry.pool.repositories:
+        assert repo._disable_cache == disable_cache