hatch
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As of 1.16, tests no longer work offline (they try to install packages from the Internet)
In 1.16.1 release, multiple tests are now failing in network-isolated environments while trying to install Python packages. They are not marked as requiring network. I can reproduce with 843f91680cc99b7e68e407a5afd7e98a8eb65ca1 too.
Example reproducer:
$ uv venv -p 3.12
Using CPython 3.12.12 interpreter at: /usr/bin/python3.12
Creating virtual environment at: .venv
Activate with: source .venv/bin/activate
$ uv pip install -e . editables flit-core filelock trustme pyfakefs pytest-mock pytest-xdist
Resolved 51 packages in 1.60s
Built hatch @ file:///tmp/hatch
Prepared 45 packages in 651ms
Installed 51 packages in 32ms
+ anyio==4.12.0
+ backports-zstd==1.1.0
+ certifi==2025.11.12
+ cffi==2.0.0
+ click==8.3.1
+ cryptography==46.0.3
+ distlib==0.4.0
+ editables==0.5
+ execnet==2.1.2
+ filelock==3.20.0
+ flit-core==3.12.0
+ h11==0.16.0
+ hatch==1.16.2.dev2 (from file:///tmp/hatch)
+ hatchling==1.28.0
+ httpcore==1.0.9
+ httpx==0.28.1
+ hyperlink==21.0.0
+ idna==3.11
+ iniconfig==2.3.0
+ jaraco-classes==3.4.0
+ jaraco-context==6.0.1
+ jaraco-functools==4.3.0
+ jeepney==0.9.0
+ keyring==25.7.0
+ markdown-it-py==4.0.0
+ mdurl==0.1.2
+ more-itertools==10.8.0
+ packaging==25.0
+ pathspec==0.12.1
+ pexpect==4.9.0
+ platformdirs==4.5.0
+ pluggy==1.6.0
+ ptyprocess==0.7.0
+ pycparser==2.23
+ pyfakefs==5.10.2
+ pygments==2.19.2
+ pyproject-hooks==1.2.0
+ pytest==9.0.1
+ pytest-mock==3.15.1
+ pytest-xdist==3.8.0
+ rich==14.2.0
+ secretstorage==3.5.0
+ shellingham==1.5.4
+ tomli-w==1.2.0
+ tomlkit==0.13.3
+ trove-classifiers==2025.11.14.15
+ trustme==1.2.1
+ typing-extensions==4.15.0
+ userpath==1.9.2
+ uv==0.9.13
+ virtualenv==20.35.4
$ rm -r ~/.cache/uv
$ sudo unshare -n su $USER
$ .venv/bin/pytest -n12 -m "not requires_internet and not requires_docker"
========================================================= test session starts =========================================================
platform linux -- Python 3.12.12, pytest-9.0.1, pluggy-1.6.0
rootdir: /tmp/hatch
configfile: pyproject.toml
plugins: pyfakefs-5.10.2, anyio-4.12.0, xdist-3.8.0, mock-3.15.1
12 workers [2123 items]
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FFFFFFFFFFFFFFFFF...................FF.....................FF.FFFF.........FFF............. [100%]
============================================================== FAILURES ===============================================================
_______________________________________________ TestSBOMFiles.test_sbom_from_build_data _______________________________________________
[gw10] linux -- Python 3.12.12 /tmp/hatch/.venv/bin/python3
self = <tests.backend.builders.test_wheel.TestSBOMFiles object at 0x7f6678450dd0>
hatch = <tests.conftest.CliRunner object at 0x7f6673ecf860>
helpers = <module 'tests.helpers.helpers' from '/tmp/hatch/tests/helpers/helpers.py'>, temp_dir = Path('/tmp/tmprz5ffqq1')
config_file = <hatch.config.user.ConfigFile object at 0x7f6673401010>
def test_sbom_from_build_data(self, hatch, helpers, temp_dir, config_file):
config_file.model.template.plugins["default"]["tests"] = False
config_file.save()
with temp_dir.as_cwd():
result = hatch("new", "My.App")
assert result.exit_code == 0, result.output
project_path = temp_dir / "my-app"
(project_path / "sbom1.cyclonedx.json").write_text('{"bomFormat": "CycloneDX"}')
(project_path / "sbom2.spdx.json").write_text('{"spdxVersion": "SPDX-2.3"}')
build_script = project_path / DEFAULT_BUILD_SCRIPT
build_script.write_text(
helpers.dedent(
"""
import pathlib
from hatchling.builders.hooks.plugin.interface import BuildHookInterface
class CustomHook(BuildHookInterface):
def initialize(self, version, build_data):
build_data["sbom_files"].append("sbom2.spdx.json")
"""
)
)
config = {
"project": {"name": "My.App", "dynamic": ["version"]},
"tool": {
"hatch": {
"version": {"path": "src/my_app/__about__.py"},
"build": {
"targets": {"wheel": {"sbom-files": ["sbom1.cyclonedx.json"]}},
"hooks": {"custom": {"path": DEFAULT_BUILD_SCRIPT}},
},
}
},
}
builder = WheelBuilder(str(project_path), config=config)
build_path = project_path / "dist"
build_path.mkdir()
with project_path.as_cwd():
> artifacts = list(builder.build(directory=str(build_path)))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
/tmp/hatch/tests/backend/builders/test_wheel.py:3972:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/tmp/hatch/.venv/lib/python3.12/site-packages/hatchling/builders/plugin/interface.py:149: in build
build_hook.initialize(version, build_data)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <hatch_build.py.CustomHook object at 0x7f66735ce270>, version = 'standard'
build_data = {'artifacts': [], 'build_hooks': ('custom',), 'dependencies': [], 'extra_metadata': {}, ...}
def initialize(self, version, build_data):
> build_data["sbom_files"].append("sbom2.spdx.json")
^^^^^^^^^^^^^^^^^^^^^^^^
E KeyError: 'sbom_files'
/tmp/tmprz5ffqq1/my-app/hatch_build.py:7: KeyError
________________________________________________________ test_unknown_targets _________________________________________________________
[gw10] linux -- Python 3.12.12 /tmp/hatch/.venv/bin/python3
hatch = <tests.conftest.CliRunner object at 0x7f6673ecf860>, temp_dir = Path('/tmp/tmpcdoyly4a')
helpers = <module 'tests.helpers.helpers' from '/tmp/hatch/tests/helpers/helpers.py'>
def test_unknown_targets(hatch, temp_dir, helpers):
project_name = "My.App"
with temp_dir.as_cwd():
result = hatch("new", project_name)
assert result.exit_code == 0, result.output
path = temp_dir / "my-app"
with path.as_cwd():
result = hatch("build", "-t", "foo")
> assert result.exit_code == 1, result.output
E AssertionError: Creating environment: hatch-build
E Checking dependencies
E Syncing dependencies
E
E assert 2 == 1
E + where 2 = <Result SystemExit(2)>.exit_code
/tmp/hatch/tests/cli/build/test_build.py:250: AssertionError
-------------------------------------------------------- Captured stderr call ---------------------------------------------------------
error: Failed to fetch: `https://pypi.org/simple/hatchling/`
Caused by: Request failed after 3 retries
Caused by: error sending request for url (https://pypi.org/simple/hatchling/)
Caused by: client error (Connect)
Caused by: dns error
Caused by: failed to lookup address information: Name or service not known
____________________________________________________ test_verbose_output_to_stderr ____________________________________________________
[gw11] linux -- Python 3.12.12 /tmp/hatch/.venv/bin/python3
hatch = <tests.conftest.CliRunner object at 0x7f2793b067b0>, temp_dir = Path('/tmp/tmplbooz4ca')
@pytest.mark.usefixtures("mock_backend_process")
def test_verbose_output_to_stderr(hatch, temp_dir):
"""Test that verbose output (command display and status messages) goes to stderr, not stdout."""
project_name = "My.App"
with temp_dir.as_cwd():
hatch("new", project_name)
path = temp_dir / "my-app"
data_path = temp_dir / "data"
data_path.mkdir()
# Run with verbose flag (-v) and separate stderr from stdout
with path.as_cwd(env_vars={ConfigEnvVars.DATA: str(data_path)}):
result = hatch("-v", "version")
> assert result.exit_code == 0, result.output
E AssertionError: Creating environment: hatch-build
E Checking dependencies
E Syncing dependencies
E
E assert 2 == 0
E + where 2 = <Result SystemExit(2)>.exit_code
/tmp/hatch/tests/cli/version/test_version.py:388: AssertionError
-------------------------------------------------------- Captured stderr call ---------------------------------------------------------
Using CPython 3.12.12 interpreter at: /tmp/hatch/.venv/bin/python3
Creating virtual environment at: /tmp/tmplbooz4ca/data/env/virtual/my-app/ODC-L8f_/hatch-build
Using Python 3.12.12 environment at: /tmp/tmplbooz4ca/data/env/virtual/my-app/ODC-L8f_/hatch-build
error: Failed to fetch: `https://pypi.org/simple/hatchling/`
Caused by: Request failed after 3 retries
Caused by: error sending request for url (https://pypi.org/simple/hatchling/)
Caused by: client error (Connect)
Caused by: dns error
Caused by: failed to lookup address information: Name or service not known
[…]
======================================================= short test summary info =======================================================
FAILED tests/backend/builders/test_wheel.py::TestSBOMFiles::test_sbom_from_build_data - KeyError: 'sbom_files'
FAILED tests/cli/build/test_build.py::test_unknown_targets - AssertionError: Creating environment: hatch-build
FAILED tests/cli/version/test_version.py::test_verbose_output_to_stderr - AssertionError: Creating environment: hatch-build
FAILED tests/workspaces/test_config.py::TestWorkspaceConfiguration::test_workspace_build_all_members - assert 2 == 0
FAILED tests/workspaces/test_config.py::TestWorkspaceConfiguration::test_workspace_member_features - assert 1 == 0
FAILED tests/cli/build/test_build.py::test_clean_only_hooks_only - AssertionError: Creating environment: hatch-build
FAILED tests/workspaces/test_config.py::TestWorkspaceConfiguration::test_workspace_development_workflow - assert 2 == 0
FAILED tests/workspaces/test_config.py::TestWorkspaceConfiguration::test_workspace_parallel_dependency_resolution - assert 1 == 0
FAILED tests/workspaces/test_config.py::TestWorkspaceConfiguration::test_workspace_exclude_patterns - assert 1 == 0
FAILED tests/cli/build/test_build.py::test_mutually_exclusive_hook_options - AssertionError: Creating environment: hatch-build
FAILED tests/cli/version/test_version.py::test_other_backend_show - AssertionError: Creating environment: hatch-build
FAILED tests/workspaces/test_config.py::TestWorkspaceConfiguration::test_workspace_library_with_plugins - assert 2 == 0
FAILED tests/workspaces/test_config.py::TestWorkspaceConfiguration::test_workspace_members_editable_install - assert 1 == 0
FAILED tests/workspaces/test_config.py::TestWorkspaceConfiguration::test_workspace_overrides_platform_conditional_members - assert 1 == 0
FAILED tests/workspaces/test_config.py::TestWorkspaceConfiguration::test_workspace_overrides_matrix_conditional_members - assert 1 == 0
FAILED tests/cli/build/test_build.py::test_clean_hooks_after - AssertionError: Creating environment: hatch-build
FAILED tests/workspaces/test_config.py::TestWorkspaceConfiguration::test_workspace_multi_service_application - assert 2 == 0
FAILED tests/cli/new/test_new.py::test_initialize_setup_cfg_only - AssertionError: Migrating project metadata from setuptools
FAILED tests/workspaces/test_config.py::TestWorkspaceConfiguration::test_environment_specific_workspace_slices - assert 1 == 0
FAILED tests/cli/build/test_build.py::test_default - AssertionError: Creating environment: hatch-build
FAILED tests/workspaces/test_config.py::TestWorkspaceConfiguration::test_workspace_cross_member_dependencies - assert 1 == 0
FAILED tests/workspaces/test_config.py::TestWorkspaceConfiguration::test_workspace_documentation_generation - assert 1 == 0
FAILED tests/cli/build/test_build.py::test_clean_hooks_after_env_var - AssertionError: Creating environment: hatch-build
FAILED tests/workspaces/test_config.py::TestWorkspaceConfiguration::test_workspace_overrides_combined_conditions - assert 1 == 0
FAILED tests/workspaces/test_config.py::TestWorkspaceConfiguration::test_workspace_no_members_fallback - assert 1 == 0
FAILED tests/cli/version/test_version.py::test_show_dynamic - AssertionError: Creating environment: hatch-build
FAILED tests/cli/build/test_build.py::test_explicit_targets - AssertionError: Creating environment: hatch-build
FAILED tests/cli/project/test_metadata.py::test_other_backend - AssertionError: Creating environment: hatch-build
FAILED tests/cli/build/test_build.py::test_explicit_directory - AssertionError: Creating environment: hatch-build
FAILED tests/cli/build/test_build.py::test_clean_only_no_hooks - AssertionError: Creating environment: hatch-build
FAILED tests/cli/version/test_version.py::test_plugin_dependencies_unmet - AssertionError: Syncing environment plugin requirements
FAILED tests/cli/project/test_metadata.py::test_default_all - AssertionError: Creating environment: hatch-build
FAILED tests/cli/build/test_build.py::test_hooks_only - AssertionError: Creating environment: hatch-build
FAILED tests/cli/build/test_build.py::test_explicit_directory_env_var - AssertionError: Creating environment: hatch-build
FAILED tests/cli/version/test_version.py::test_set_dynamic - AssertionError: Creating environment: hatch-build
FAILED tests/cli/build/test_build.py::test_clean - AssertionError: Creating environment: hatch-build
FAILED tests/cli/project/test_metadata.py::test_field_readme - AssertionError: Creating environment: hatch-build
FAILED tests/cli/build/test_build.py::test_hooks_only_env_var - AssertionError: Creating environment: hatch-build
FAILED tests/cli/build/test_build.py::test_clean_env_var - AssertionError: Creating environment: hatch-build
FAILED tests/cli/version/test_version.py::test_set_dynamic_downgrade - AssertionError: Creating environment: hatch-build
FAILED tests/cli/project/test_metadata.py::test_field_string - AssertionError: Creating environment: hatch-build
FAILED tests/cli/build/test_build.py::test_clean_only - AssertionError: Creating environment: hatch-build
FAILED tests/cli/build/test_build.py::test_extensions_only - AssertionError: Creating environment: hatch-build
FAILED tests/cli/project/test_metadata.py::test_field_complex - AssertionError: Creating environment: hatch-build
FAILED tests/cli/build/test_build.py::test_no_hooks - AssertionError: Creating environment: hatch-build
FAILED tests/cli/project/test_metadata.py::test_plugin_dependencies_unmet - AssertionError: Syncing environment plugin requirements
FAILED tests/cli/build/test_build.py::test_no_hooks_env_var - AssertionError: Creating environment: hatch-build
FAILED tests/cli/project/test_metadata.py::test_build_dependencies_unmet - AssertionError: Creating environment: hatch-build
FAILED tests/cli/build/test_build.py::test_debug_verbosity - AssertionError: Creating environment: hatch-build
FAILED tests/cli/build/test_build.py::test_plugin_dependencies_unmet - AssertionError: Syncing environment plugin requirements
FAILED tests/cli/clean/test_clean.py::test - AssertionError: Creating environment: hatch-build
============================================ 51 failed, 2030 passed, 42 skipped in 47.06s =============================================
Note that you may need to remove uv's cache first to reproduce.
Full output (140k): pytest.txt
I will try to repro this. One note - we no longer use pyfakefs as of 1.16.0 because it was used in 2 places and did not work correctly with coverage on 3.14 until a recent fix was made.
@cjames23 I'm also running into this situation. My host is behind a corporate proxy and since v1.16.0 we are unable to install any package using hatch.
Reverting to <1.16.0 fixes the issue.
