menda-keyring 0.0.1

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menda-keyring

menda-keyring is a python keyring backend that supplies short-lived for menda package registry credentials for tools like uv and pip. It does not store passwords locally. Instead, it talks to menda cloud, which exchanges your menda identity (machine or user) for a registry token when a client asks for credentials for a menda cloud private registry.

Use it when your private package index is hosted by menda and you want installs to authenticate through menda cloud.

Requirements

• Python 3.12+
• A configured Menda environment (see Credentials)
• Tools that use the standard keyring protocol for HTTP basic auth to private indexes (e.g. uv with keyring integration enabled)

Installation

Install the package into the same environment where you run uv or pip:

uv tool install keyring --with menda-keyring

The package registers a keyring backend via the keyring.backends entry point (menda-keyring). After installation, ensure your keyring stack can discover third-party backends keyring --list-backends.

How it works

1. uv or pip requests credentials for a URL that matches an AWS CodeArtifact host (e.g. *.d.codeartifact.*.amazonaws.com).
2. The keyring calls MendaCodeArtifactKeyring.get_password(service_url, username).
3. The backend resolves Menda auth, obtains a Menda access token, then calls menda-cloud’s POST /api/v1/auth/registry/token to receive a AWS CodeArtifact token returned as the “password” for that URL.

Non-CodeArtifact URLs are ignored (get_password returns None so other backends can handle them). set_password and delete_password are no-ops; this backend never writes secrets to the keychain.

Configuring your pyproject.toml

Point uv at your CodeArtifact simple index (or extra index) URL as provided by your menda team.

Example shape (values are illustrative):

[tool.uv]
keyring-provider = "subprocess"

# PyPI is default so build deps (e.g. hatchling) and public wheels do not go through CodeArtifact.
[[tool.uv.index]]
name = "pypi"
url = "https://pypi.org/simple"
default = true

# Menda SaaS private registry
[[tool.uv.index]]
name = "menda-private"
url = "https://[e-mail]/pypi/menda-plugins/simple/"

Keep using your normal uv/pip configuration for index URLs; menda-keyring only supplies the credential when the URL is recognized as CodeArtifact.

Credentials

Auth resolution matches the lightweight logic used menda-core package. Tokens are cached under ~/.menda/tokens/cache/.token where applicable (with expiry checks).

Resolution order

1. M2M via environment variables — if all of these are set, they take precedence:

   • MENDA_CLIENT_ID
   • MENDA_CLIENT_SECRET
   • MENDA_HOST (menda-cloud API base URL, e.g. https://…)

   A cached Menda access token may be reused when keyed by client_id; otherwise the client performs OAuth2 client-credentials against MENDA_HOST, then exchanges for a registry token.

2. Profile from ~/.menda/mendacfg — if the env trio above is not complete, the active profile is loaded (see MENDA_PROFILE_ID, default default).

   • auth_type = m2m — requires host, client_id, and client_secret in the profile. Uses the same token flow as (1), with cache keyed by profile id.
   • auth_type = u2m (default if omitted) — requires host and a valid cached user token from menda auth login (stored in the token cache). If there is no valid cache, you must sign in again or switch to M2M.

Files and environment variables

Item	Purpose
~/.menda/mendacfg	INI profiles: host, auth_type, and for M2M client_id / client_secret
~/.menda/tokens/cache/.token	Cached tokens (user or M2M), shared with the main Menda CLI where applicable
MENDA_PROFILE_ID	Which mendacfg section to use (default: default)
MENDA_CLIENT_ID, MENDA_CLIENT_SECRET, MENDA_HOST	Optional: full M2M override without reading a profile

Example mendacfg snippets

User (device flow, token cache):

[default]
host = https://api.example.menda.cloud
auth_type = u2m

Machine (client credentials in profile):

[ci]
host = https://api.example.menda.cloud
auth_type = m2m
client_id = <your-client-id>
client_secret = <your-client-secret>

Then set MENDA_PROFILE_ID=ci in CI if not using the default profile.

Troubleshooting

Symptom	What to check
“No valid cached token … Run menda auth login”	U2M profile without a fresh login, or expired cache. Re-login or use M2M.
“Menda config file not found”	Run menda auth configure to create ~/.menda/mendacfg.
“No profile …” / “Profile … has no host”	Fix MENDA_PROFILE_ID or add the named section with host = ….
“auth_type=m2m but is missing client_id or client_secret”	Add both fields to the profile or use env-based M2M.
HTTP errors from oauth2/token or registry/token	Network, wrong MENDA_HOST / host, or invalid credentials; see exception message and optional status_code on MendaCloudAPIError.
Credentials work for PyPI but not private packages	Confirm the index URL is a CodeArtifact URL matching *.d.codeartifact.*.amazonaws.com and that keyring is actually invoked by your installer.

Errors raised by this package are typed under menda.error.exceptions (e.g. MendaCloudAPIError, NoCachedLoginError, ProfileNotFoundError).