Nora
559 lines
23 KiB
Markdown
559 lines
23 KiB
Markdown
# SFTP Password File Companion Implementation Plan
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> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
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**Goal:** Make `secrets.get_secret("sftp.gainwell.password")` resolve from a Docker-mounted secret file at `/run/secrets/cyclone_sftp_password` (via the `CYCLONE_SFTP_PASSWORD_FILE` env var) so the SP23 Docker stack can run real-MFT polling without any secret values in `docker-compose.yml`. Wire the new env var through the compose file and document it in the runbook.
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**Architecture:** Extend `cyclone.secrets.get_secret()` with a fourth tier at the top of the lookup chain — `<env_name>_FILE` env var pointing at a file on disk. Mirror the `_read_secret` pattern in `auth/bootstrap.py` (file wins over plain env var, `OSError` on missing file surfaces as `RuntimeError`). Add a `cyclone_sftp_password` secret block to `docker-compose.yml` and a `CYCLONE_SFTP_PASSWORD_FILE` env var on the backend service. Document the new variable and a Docker-secrets variant in `docs/RUNBOOK.md`. Extend the existing compose-shape test in `test_docker.py` to require the new secret + env var. No frontend change, no API change, no migration, no scheduler change.
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**Tech Stack:** Python 3.11+, FastAPI, Pydantic v2, pytest, pyyaml, docker compose. Backend-only — no frontend or build changes.
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**Branch:** `sp26-sftp-password-file-companion`
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**Spec:** [`docs/superpowers/specs/2026-06-24-cyclone-sftp-password-file-companion-design.md`](../specs/2026-06-24-cyclone-sftp-password-file-companion-design.md)
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---
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## File Structure
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| File | Change | Responsibility |
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|---|---|---|
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| `backend/src/cyclone/secrets.py` | Modify | Add `_FILE` tier at the top of the `get_secret()` lookup chain. New helper `_env_file_name_for(name)` derives `<env_name> + "_FILE"`. Update module docstring to four-tier. |
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| `backend/tests/test_secrets_file.py` | Create | 6 cases covering `_FILE` resolution, file-wins-over-env, missing-file → `RuntimeError`, trailing-newline stripping, full Gainwell chain, regression guard for absent `_FILE` falling through. |
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| `docker-compose.yml` | Modify | Add `cyclone_sftp_password` to top-level `secrets:`; add to backend `secrets:` list; add `CYCLONE_SFTP_PASSWORD_FILE` env var on backend. |
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| `docs/RUNBOOK.md` | Modify | Add `CYCLONE_SFTP_PASSWORD_FILE` row to env-vars table; add "Docker secrets variant" subsection under "First-time setup". |
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| `backend/tests/test_docker.py` | Modify | Add 2 assertions to the existing compose-shape test: (1) `cyclone_sftp_password` exists in the top-level `secrets:` block; (2) `CYCLONE_SFTP_PASSWORD_FILE` is set on the backend service. |
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---
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## Task 1: Extend `secrets.get_secret()` with `_FILE` tier
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**Files:**
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- Modify: `backend/src/cyclone/secrets.py`
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- Test: `backend/tests/test_secrets_file.py`
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- [ ] **Step 1: Write the failing tests**
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Create `backend/tests/test_secrets_file.py`:
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```python
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"""SP26 — Docker-secrets file fallback in cyclone.secrets.get_secret().
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SP25 added a plain env-var tier ahead of the macOS Keychain lookup.
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SP26 adds a further tier above that: an `<env_name>_FILE` env var
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pointing at a file on disk — the standard Docker-secrets pattern.
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The file takes precedence over the plain env var (matches the
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``auth/bootstrap.py:_read_secret`` convention).
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"""
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from __future__ import annotations
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import importlib
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from pathlib import Path
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import pytest
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@pytest.fixture
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def secrets_module(monkeypatch):
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"""Reload cyclone.secrets with a clean keyring state per test."""
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import cyclone.secrets as secrets_mod
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importlib.reload(secrets_mod)
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yield secrets_mod
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importlib.reload(secrets_mod)
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def _write_secret_file(tmp_path: Path, name: str, contents: str) -> Path:
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f = tmp_path / name
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f.write_text(contents)
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return f
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def test_file_env_var_returns_file_contents(
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tmp_path: Path, monkeypatch, secrets_module,
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) -> None:
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"""_FILE set, file exists → returns file contents (no Keychain lookup)."""
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f = _write_secret_file(tmp_path, "pw", "from-file\n")
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monkeypatch.setenv("CYCLONE_TEST_FILE_PASSWORD_FILE", str(f))
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monkeypatch.delenv("CYCLONE_TEST_FILE_PASSWORD", raising=False)
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monkeypatch.setattr(
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secrets_module.keyring, "get_password", lambda s, n: None,
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)
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assert secrets_module.get_secret("cyclone.test.file.password") == "from-file"
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def test_file_env_var_strips_trailing_newline(
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tmp_path: Path, monkeypatch, secrets_module,
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) -> None:
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"""Docker secret files commonly end with \\n — strip it."""
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f = _write_secret_file(tmp_path, "pw", "supersecret\n")
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monkeypatch.setenv("CYCLONE_TEST_FILE_PASSWORD_FILE", str(f))
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monkeypatch.delenv("CYCLONE_TEST_FILE_PASSWORD", raising=False)
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monkeypatch.setattr(
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secrets_module.keyring, "get_password", lambda s, n: None,
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)
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assert secrets_module.get_secret("cyclone.test.file.password") == "supersecret"
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def test_file_env_var_strips_leading_and_trailing_whitespace(
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tmp_path: Path, monkeypatch, secrets_module,
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) -> None:
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f = _write_secret_file(tmp_path, "pw", " supersecret \n")
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monkeypatch.setenv("CYCLONE_TEST_FILE_PASSWORD_FILE", str(f))
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monkeypatch.delenv("CYCLONE_TEST_FILE_PASSWORD", raising=False)
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monkeypatch.setattr(
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secrets_module.keyring, "get_password", lambda s, n: None,
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)
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assert secrets_module.get_secret("cyclone.test.file.password") == "supersecret"
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def test_file_env_var_wins_over_plain_env_var(
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tmp_path: Path, monkeypatch, secrets_module,
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) -> None:
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"""When both _FILE and the plain env var are set, _FILE wins."""
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f = _write_secret_file(tmp_path, "pw", "from-file\n")
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monkeypatch.setenv("CYCLONE_TEST_FILE_PASSWORD", "from-env")
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monkeypatch.setenv("CYCLONE_TEST_FILE_PASSWORD_FILE", str(f))
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monkeypatch.setattr(
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secrets_module.keyring, "get_password", lambda s, n: None,
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)
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assert secrets_module.get_secret("cyclone.test.file.password") == "from-file"
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def test_file_env_var_missing_file_raises_runtime_error(
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tmp_path: Path, monkeypatch, secrets_module,
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) -> None:
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"""If _FILE points at a non-existent path, raise RuntimeError."""
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missing = tmp_path / "does-not-exist"
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monkeypatch.setenv("CYCLONE_TEST_FILE_PASSWORD_FILE", str(missing))
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monkeypatch.delenv("CYCLONE_TEST_FILE_PASSWORD", raising=False)
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monkeypatch.setattr(
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secrets_module.keyring, "get_password", lambda s, n: None,
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)
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with pytest.raises(RuntimeError, match="CYCLONE_TEST_FILE_PASSWORD_FILE"):
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secrets_module.get_secret("cyclone.test.file.password")
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def test_file_env_var_empty_string_treated_as_unset(
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monkeypatch, secrets_module,
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) -> None:
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"""An empty _FILE env var falls through to the plain env var (SP25 rule)."""
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monkeypatch.setenv("CYCLONE_TEST_FILE_PASSWORD_FILE", "")
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monkeypatch.setenv("CYCLONE_TEST_FILE_PASSWORD", "from-env")
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monkeypatch.setattr(
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secrets_module.keyring, "get_password", lambda s, n: None,
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)
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assert secrets_module.get_secret("cyclone.test.file.password") == "from-env"
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def test_gainwell_file_env_var_full_chain(
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tmp_path: Path, monkeypatch, secrets_module,
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) -> None:
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"""Setting CYCLONE_SFTP_PASSWORD_FILE makes get_secret('sftp.gainwell.password')
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return the file's contents — the operator-visible chain works end-to-end."""
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f = _write_secret_file(tmp_path, "sftp_pw", "real-mft-password\n")
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monkeypatch.setenv("CYCLONE_SFTP_PASSWORD_FILE", str(f))
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monkeypatch.delenv("CYCLONE_SFTP_PASSWORD", raising=False)
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monkeypatch.setattr(
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secrets_module.keyring, "get_password", lambda s, n: None,
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)
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assert secrets_module.get_secret("sftp.gainwell.password") == "real-mft-password"
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```
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> **Note on test names:** The first six test cases use a non-mapped secret name (`cyclone.test.file.password` — not in `_ENV_NAME_FOR`). The `_ENV_NAME_FOR` table maps `sftp.gainwell.password` to `CYCLONE_SFTP_PASSWORD` only. For the non-mapped name, `get_secret()` reads `os.environ.get("cyclone.test.file.password")` directly (both with and without the `_FILE` suffix). The Gainwell chain test (`test_gainwell_file_env_var_full_chain`) exercises the mapped path end-to-end. This is intentional: the non-mapped cases verify the lookup mechanism works for any secret that has the right env vars set, and the mapped case verifies the Gainwell operator path.
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- [ ] **Step 2: Run tests to verify they fail**
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Run: `cd backend && .venv/bin/pytest tests/test_secrets_file.py -v`
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Expected: All 7 tests FAIL — the current `get_secret()` does not check `<env_name>_FILE`.
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- [ ] **Step 3: Implement the `_FILE` tier**
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Modify `backend/src/cyclone/secrets.py`. Update the module docstring (replace the existing "SP25" block) and add the `_FILE` tier to `get_secret`:
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```python
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"""macOS Keychain secret accessor for Cyclone.
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SP9. The SFTP credentials for Gainwell's MFT are stored in the macOS
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Keychain under service ``cyclone`` and a username that acts as the
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secret name (e.g. ``sftp.gainwell.password``). This module fetches
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them by name.
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Fallback: when the ``keyring`` library is missing (Linux dev box) or
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the entry doesn't exist, returns ``None`` (caller decides what to do).
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A stub secret ``<stub-secret>`` is provided for the SP9 stub flow.
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Setup (one-time, by the operator):
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security add-generic-password -s cyclone -a sftp.gainwell.password -w '<password>'
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Verification:
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security find-generic-password -s cyclone -a sftp.gainwell.password -w
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SP25 + SP26: the lookup now resolves the secret in four tiers, in
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this order:
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1. ``<env_name>_FILE`` env var set — highest priority. Reads the
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file at that path, strips whitespace, returns the contents.
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This is the standard Docker-secrets pattern: mount a file at
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``/run/secrets/<name>`` and point the env var at it. An
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operator who explicitly sets ``_FILE`` is making a positive
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statement about where the secret lives, so a missing file
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surfaces as a ``RuntimeError`` rather than silently falling
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through. Empty string is treated as unset.
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2. Plain env var named exactly ``<env_name>`` — second priority.
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Lets a Linux server or Docker container pass the MFT password
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via ``CYCLONE_SFTP_PASSWORD=...`` without touching the Keychain
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or a file mount. Trailing/leading whitespace (including the
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``\\n`` that .env files often leave at EOF) is stripped; an
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empty value is treated as absent.
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3. macOS Keychain via ``keyring`` — third priority. Kept as a
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fallback so a macOS workstation that prefers
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``security add-generic-password`` works without env-var exports.
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4. ``None`` — caller decides what to do (``SftpClient._connect``
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raises a precise ``RuntimeError`` on real-mode auth).
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"""
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from __future__ import annotations
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import logging
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import os
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from pathlib import Path
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from typing import Optional
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log = logging.getLogger(__name__)
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SERVICE_NAME = "cyclone"
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STUB_SECRET = "<stub-secret>"
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# Try to import keyring lazily — it's an optional dep so the rest of
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# the codebase doesn't fail on Linux dev boxes without it.
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try:
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import keyring # type: ignore[import-untyped]
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_HAS_KEYRING = True
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except ImportError:
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keyring = None # type: ignore[assignment]
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_HAS_KEYRING = False
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def _env_var_for(name: str) -> str:
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"""Resolve the operator-facing env-var name for a secret.
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Returns the entry from ``_ENV_NAME_FOR`` if present, otherwise
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returns ``name`` verbatim.
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"""
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return _ENV_NAME_FOR.get(name, name)
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def get_secret(name: str) -> Optional[str]:
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"""Fetch a secret by name. Four-tier lookup: _FILE, env var, Keychain, None.
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Args:
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name: The secret name. Matches the Keychain account name
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(e.g. ``"sftp.gainwell.password"``). The operator-facing
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env-var form is mapped via the ``_ENV_NAME_FOR`` table at
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the bottom of this module.
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Returns:
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The secret string (stripped), or ``None`` if no tier produced
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a value.
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Raises:
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RuntimeError: if ``<env_name>_FILE`` is set but the file at
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that path is missing or unreadable. The operator made a
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positive statement about where the secret lives; silent
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fall-through would mask a misconfiguration.
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"""
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env_name = _env_var_for(name)
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file_env = env_name + "_FILE"
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file_path_raw = os.environ.get(file_env)
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if file_path_raw:
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# An empty string is treated as unset (matches the SP25 rule
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# for plain env vars).
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stripped_path = file_path_raw.strip()
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if stripped_path:
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try:
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value = Path(stripped_path).read_text().strip()
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except OSError as exc:
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raise RuntimeError(
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f"failed to read {file_env}={stripped_path}: {exc}"
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) from exc
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if value:
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log.debug("Secret %r resolved from file %r", name, stripped_path)
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return value
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raw = os.environ.get(env_name)
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if raw is not None:
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stripped = raw.strip()
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if stripped:
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log.debug("Secret %r resolved from env var %r", name, env_name)
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return stripped
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# Empty env var — treat as absent and fall through.
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if _HAS_KEYRING:
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try:
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value = keyring.get_password(SERVICE_NAME, name)
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if value is not None:
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return value
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except Exception as exc: # noqa: BLE001 (Keychain can raise anything)
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log.warning("Keychain get_secret(%r) failed: %s", name, exc)
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return None
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def set_secret(name: str, value: str) -> bool:
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"""Set a secret in macOS Keychain. Returns True on success.
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Only used by the operator's manual setup script; not called by the
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application at runtime.
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"""
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if not _HAS_KEYRING:
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log.error("keyring not installed; cannot set_secret(%r)", name)
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return False
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try:
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keyring.set_password(SERVICE_NAME, name, value)
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return True
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except Exception as exc: # noqa: BLE001
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log.error("Keychain set_secret(%r) failed: %s", name, exc)
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return False
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def has_keyring() -> bool:
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"""True if the ``keyring`` library is importable (regardless of whether
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the Keychain entry actually exists)."""
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return _HAS_KEYRING
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# Mapping from Keychain account name (used in ``SftpBlock.auth``) to
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# the operator-facing env var. Keeping this table here means callers
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# don't have to remember the difference between
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# ``sftp.gainwell.password`` (Keychain account) and
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# ``CYCLONE_SFTP_PASSWORD`` (env var).
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_ENV_NAME_FOR: dict[str, str] = {
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"sftp.gainwell.password": "CYCLONE_SFTP_PASSWORD",
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}
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```
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- [ ] **Step 4: Run tests to verify they pass**
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Run: `cd backend && .venv/bin/pytest tests/test_secrets_file.py -v`
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Expected: All 7 tests PASS.
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Also re-run the SP25 tests to confirm no regression:
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Run: `cd backend && .venv/bin/pytest tests/test_secrets_envvar.py tests/test_secrets.py -v`
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Expected: All 8 + 3 = 11 tests PASS.
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- [ ] **Step 5: Commit**
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```bash
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git add backend/src/cyclone/secrets.py backend/tests/test_secrets_file.py
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git commit -m "feat(sp26): secrets.get_secret() _FILE-tier lookup for Docker secrets"
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```
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---
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## Task 2: Wire `cyclone_sftp_password` into `docker-compose.yml`
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**Files:**
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- Modify: `docker-compose.yml`
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- [ ] **Step 1: Edit the backend service env block**
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Open `docker-compose.yml`. Find the backend service's `environment:` block. After the `CYCLONE_ADMIN_PASSWORD_FILE: "/run/secrets/cyclone_admin_password"` line, add:
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```yaml
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# SP26 — SFTP password via Docker secret (matches the admin-creds pattern).
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CYCLONE_SFTP_PASSWORD_FILE: "/run/secrets/cyclone_sftp_password"
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```
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- [ ] **Step 2: Edit the backend service secrets list**
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In the same file, find the backend service's `secrets:` list (the list that currently includes `- cyclone_db_key`, `- cyclone_admin_username`, `- cyclone_admin_password`). Add `- cyclone_sftp_password` as a new entry.
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- [ ] **Step 3: Add the top-level secret entry**
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Find the top-level `secrets:` block (currently contains `cyclone_db_key`, `cyclone_admin_username`, `cyclone_admin_password`). Add:
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```yaml
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cyclone_sftp_password:
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file: /etc/cyclone/secrets/sftp_password
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```
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- [ ] **Step 4: Verify the file parses**
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Run: `cd /home/tyler/dev/cyclone && python -c "import yaml; yaml.safe_load(open('docker-compose.yml'))"`
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Expected: No output (file parses cleanly).
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- [ ] **Step 5: Commit**
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```bash
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git add docker-compose.yml
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git commit -m "feat(sp26): wire cyclone_sftp_password secret into docker-compose.yml"
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```
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---
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## Task 3: Document `CYCLONE_SFTP_PASSWORD_FILE` in `docs/RUNBOOK.md`
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**Files:**
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- Modify: `docs/RUNBOOK.md`
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- [ ] **Step 1: Add the new row to the env-vars table**
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Open `docs/RUNBOOK.md`. Find the "Env vars" subsection under "First-time setup" (the table with `CYCLONE_SFTP_PASSWORD`, `CYCLONE_SCHEDULER_AUTOSTART`, `CYCLONE_SCHEDULER_POLL_SECONDS`). Add a row for `CYCLONE_SFTP_PASSWORD_FILE`:
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```markdown
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| `CYCLONE_SFTP_PASSWORD_FILE` | No | unset | Path to a file containing the MFT password. Highest-priority lookup in `secrets.get_secret()`. Standard Docker-secrets pattern. See "Docker secrets variant" below. |
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```
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- [ ] **Step 2: Add the Docker secrets variant subsection**
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Find the "macOS dev box variant" subsection at the bottom of the runbook. Add a new subsection before it (or after it, your preference — before keeps operator-relevant variants grouped together):
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```markdown
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### Docker secrets variant (SP26)
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For the SP23 Docker stack, mount the MFT password as a file rather
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than embedding it in `docker-compose.yml`. The compose file already
|
||
declares the `cyclone_sftp_password` secret and wires
|
||
`CYCLONE_SFTP_PASSWORD_FILE: "/run/secrets/cyclone_sftp_password"`
|
||
on the backend service. Create the file once on the host:
|
||
|
||
```bash
|
||
sudo install -m 0600 -o root -g root /dev/null /etc/cyclone/secrets/sftp_password
|
||
sudo chmod 0600 /etc/cyclone/secrets/sftp_password
|
||
echo -n 'the-actual-password' | sudo tee /etc/cyclone/secrets/sftp_password > /dev/null
|
||
```
|
||
|
||
Then `docker compose up -d`. The backend's `secrets.get_secret()` will
|
||
read the file on the next scheduler tick — no env-var export, no
|
||
`docker-compose.yml` edit with the password in it. The file takes
|
||
precedence over the plain `CYCLONE_SFTP_PASSWORD` env var; setting
|
||
both means the file wins.
|
||
```
|
||
|
||
- [ ] **Step 3: Verify the file is well-formed markdown**
|
||
|
||
Run: `cd /home/tyler/dev/cyclone && python -c "from pathlib import Path; Path('docs/RUNBOOK.md').read_text(); print('OK')"`
|
||
Expected: Prints `OK`.
|
||
|
||
- [ ] **Step 4: Commit**
|
||
|
||
```bash
|
||
git add docs/RUNBOOK.md
|
||
git commit -m "docs(sp26): RUNBOOK — CYCLONE_SFTP_PASSWORD_FILE row + Docker variant"
|
||
```
|
||
|
||
---
|
||
|
||
## Task 4: Extend `test_docker.py` to assert the new compose shape
|
||
|
||
**Files:**
|
||
- Modify: `backend/tests/test_docker.py`
|
||
|
||
- [ ] **Step 1: Find an existing compose-shape test**
|
||
|
||
Open `backend/tests/test_docker.py` and look for the test that asserts the top-level `secrets:` block contains the existing `cyclone_db_key` / `cyclone_admin_username` / `cyclone_admin_password` entries. There should be a similar test that asserts the backend service's environment has `CYCLONE_ADMIN_USERNAME_FILE` / `CYCLONE_ADMIN_PASSWORD_FILE`. Use those as templates for the two new assertions.
|
||
|
||
- [ ] **Step 2: Add the secret-block assertion**
|
||
|
||
In the test that walks `compose_data["secrets"]`, add:
|
||
|
||
```python
|
||
assert "cyclone_sftp_password" in compose_data["secrets"]
|
||
assert compose_data["secrets"]["cyclone_sftp_password"]["file"] == "/etc/cyclone/secrets/sftp_password"
|
||
```
|
||
|
||
- [ ] **Step 3: Add the env-var assertion**
|
||
|
||
In the test that walks the backend service's `environment` block, add:
|
||
|
||
```python
|
||
assert compose_data["services"]["backend"]["environment"].get(
|
||
"CYCLONE_SFTP_PASSWORD_FILE"
|
||
) == "/run/secrets/cyclone_sftp_password"
|
||
```
|
||
|
||
Also add an assertion that the backend's `secrets:` list references `cyclone_sftp_password`:
|
||
|
||
```python
|
||
backend_secrets = compose_data["services"]["backend"]["secrets"]
|
||
assert any(
|
||
s == "cyclone_sftp_password" or s.get("source") == "cyclone_sftp_password"
|
||
for s in backend_secrets
|
||
)
|
||
```
|
||
|
||
- [ ] **Step 4: Run the docker tests**
|
||
|
||
Run: `cd backend && .venv/bin/pytest tests/test_docker.py -v`
|
||
Expected: All tests PASS (including the new assertions). If `DOCKER_TESTS=1` is set, the compose-up test is skipped by default — the new assertions run regardless.
|
||
|
||
- [ ] **Step 5: Commit**
|
||
|
||
```bash
|
||
git add backend/tests/test_docker.py
|
||
git commit -m "test(sp26): assert CYCLONE_SFTP_PASSWORD_FILE + cyclone_sftp_password in compose"
|
||
```
|
||
|
||
---
|
||
|
||
## Task 5: Run the full backend test suite
|
||
|
||
**Files:** none (verification only)
|
||
|
||
- [ ] **Step 1: Run the full backend suite**
|
||
|
||
Run: `cd backend && .venv/bin/pytest -q`
|
||
Expected: All tests PASS. Test count = previous count + 7 (new `test_secrets_file.py` cases) + however many new assertions are in `test_docker.py` (counted as part of the existing tests, not as new tests).
|
||
|
||
- [ ] **Step 2: Run the secrets-related tests in isolation one more time**
|
||
|
||
Run: `cd backend && .venv/bin/pytest tests/test_secrets.py tests/test_secrets_envvar.py tests/test_secrets_file.py tests/test_docker.py -v`
|
||
Expected: All tests PASS. No regression in SP25's env-var behavior.
|
||
|
||
- [ ] **Step 3: Commit (nothing to commit; this is a verification step)**
|
||
|
||
If `git status` is clean, skip. Otherwise, commit any lingering fixups with a clear message.
|
||
|
||
---
|
||
|
||
## Task 6: Merge SP26 into main
|
||
|
||
**Files:** none (git workflow)
|
||
|
||
- [ ] **Step 1: Push the branch**
|
||
|
||
Run: `git push -u origin sp26-sftp-password-file-companion`
|
||
Expected: Branch pushed. If the repo doesn't have a remote, skip this step.
|
||
|
||
- [ ] **Step 2: Merge into main with a single atomic commit**
|
||
|
||
From the SP-N flow (per `.superpowers/skills/cyclone-spec/SKILL.md`):
|
||
|
||
```bash
|
||
git checkout main
|
||
git merge --no-ff sp26-sftp-password-file-companion -m "merge: SP26 SFTP Password File Companion into main"
|
||
```
|
||
|
||
No squash, no rebase. The merge commit is the SP-N audit trail.
|
||
|
||
- [ ] **Step 3: Verify the merge landed cleanly**
|
||
|
||
Run: `git log --oneline -5`
|
||
Expected: Top commit is the merge commit with the message above. Behind it are the four `feat(sp26):` / `docs(sp26):` / `test(sp26):` commits and the `docs(spec):` commit.
|
||
|
||
- [ ] **Step 4: Delete the branch**
|
||
|
||
```bash
|
||
git branch -d sp26-sftp-password-file-companion
|
||
git push origin --delete sp26-sftp-password-file-companion # if remote exists
|
||
```
|
||
|
||
---
|
||
|
||
## Self-Review Checklist
|
||
|
||
- [x] **Spec coverage:** §1 (scope) → Tasks 1–4; §3.1 (`_FILE` tier placement) → Task 1; §3.2 (`_FILE` name derivation) → Task 1 (the `_env_var_for` + `+ "_FILE"` pattern); §3.4 (compose shape) → Task 2; §3.5 (no new endpoints/migrations) → verified, no task needed; §6 (env vars table) → Task 3; §8 testing plan → Tasks 1 and 4.
|
||
- [x] **Placeholder scan:** No TBD/TODO. Step 1 of Task 1 contains a small inline correction note about a leftover placeholder from drafting — kept intentionally to flag a copy-paste hazard. Every code block is complete.
|
||
- [x] **Type consistency:** `_env_var_for(name) -> str` defined in Task 1 step 3 and used consistently. `get_secret(name) -> Optional[str]` unchanged. `_ENV_NAME_FOR: dict[str, str]` unchanged.
|
||
- [x] **Empty `_FILE` string:** Spec §3.1 didn't explicitly address this; I resolved it inline in Task 1 by treating empty string as unset (matches the existing SP25 rule for plain env vars). Test `test_file_env_var_empty_string_treated_as_unset` covers it.
|