fnox-py

fnox-py is a thin Python wrapper around the fnox secrets management tool.

It does not reimplement fnox behavior in Python. Instead, it:

locates a real fnox binary
builds argv for common commands
runs the binary
returns parsed results or typed errors

Python requirement: >=3.12

[!NOTE] Official fnox project links:

GitHub repo: jdx/fnox

Fnox docs: https://fnox.jdx.dev

Installation

uv

uv tool install fnox-py

pip

pip install fnox-py

Bundled binary vs source install

Platform wheels are intended to bundle the fnox binary.

If you install from source instead of a platform wheel, fnox-py requires a real fnox executable to be available via:

PATH, or
FNOX_PY_BINARY=/absolute/path/to/fnox

Examples:

pip install --no-binary fnox-py fnox-py

FNOX_PY_BINARY=/usr/local/bin/fnox python -c "import fnox_py; print(fnox_py.version())"

Binary Resolution

At runtime, fnox-py resolves the fnox binary in this order:

FNOX_PY_BINARY
bundled/installed locations in the current environment
bundled/installed fallback locations associated with the base or target install
user scheme script location
PATH

If FNOX_PY_BINARY is set but points to a missing file, fnox-py raises FnoxNotFoundError.

Python API

from fnox_py import (
    config_files,
    export_json,
    get,
    lease_create,
    profiles,
    providers,
    schema,
    version,
)

value = get("MY_SECRET")
all_values = export_json()
schema_doc = schema()
profile_names = profiles()
provider_names = providers()
config_paths = config_files()
lease = lease_create("vault", duration="1h", label="local-dev")
fnox_version = version()

Common examples

Get a single value:

from fnox_py import get

token = get("API_TOKEN")

Get a value from a specific profile:

from fnox_py import get

token = get("API_TOKEN", profile="prod")

Decode base64 output:

from fnox_py import get

decoded = get("TLS_CERT", base64_decode=True)

Export all secrets as JSON:

from fnox_py import export_json

data = export_json(profile="dev")

Inspect schema, profiles, providers, and config files:

from fnox_py import config_files, profiles, providers, schema

print(schema())
print(profiles())
print(providers())
print(config_files())

Create a lease:

from fnox_py import lease_create

lease = lease_create("vault", duration="30m", label="ci-job")

Get the underlying fnox version:

from fnox_py import version

print(version())

CLI

The package installs the fnox-py console script.

Built-in subcommands

Locate the resolved binary:

fnox-py which

Show the wrapper version and attempt to print the underlying fnox version:

fnox-py version

Print basic environment diagnostics:

fnox-py doctor

Passthrough behavior

Any arguments other than which, version, and doctor are passed directly through to fnox.

For example:

fnox-py get MY_SECRET
fnox-py profiles
fnox-py export --format json

With no arguments, fnox-py runs fnox with no extra argv.

Public API

fnox-py currently exports:

config_files
export_json
get
lease_create
profiles
providers
schema
version
find_fnox_bin
run
FnoxResult
FnoxCommandError
FnoxError
FnoxNotFoundError
FnoxTimeoutError

Errors

Library calls raise typed exceptions:

FnoxNotFoundError when the binary cannot be found
FnoxCommandError when fnox exits non-zero
FnoxTimeoutError on subprocess timeout
FnoxError as the base exception type

Development

This project uses uv, pytest, ruff, and mypy.

Install dependencies:

uv sync

Run tests:

uv run pytest -v

Run a single test:

uv run pytest tests/test_api.py::test_get -q

Lint:

uv run ruff check src tests scripts

Type-check:

uv run mypy src

Build distributions:

uv build

Release / Platform Wheel Build

scripts/build_platform_wheel.py builds platform-specific wheels by:

building a pure Python wheel
downloading upstream fnox release binaries
injecting the binary into the wheel
rewriting wheel metadata
building an sdist

The upstream fnox version to bundle is read from FNOX_VERSION.txt at the repo root by default. To override it, pass --fnox-version:

uv run python scripts/build_platform_wheel.py --fnox-version 1.0.0 --output dist/

Expected upstream archive and extracted binary SHA256 values are pinned in FNOX_HASHES.json and verified during release builds.

To bump the bundled version, update FNOX_VERSION.txt, refresh FNOX_HASHES.json, and commit both changes.

Notes

fnox-py is intentionally small and wrapper-focused.
For behavior, flags, and command semantics, prefer the upstream fnox documentation.
If you need lower-level control, use run() directly and inspect FnoxResult.

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