v0.5.0: TrueNAS alert when an update is available

Raises a real alert in the TrueNAS UI bell -- not a log line nobody reads. On by
default, checked once a day. install.sh --no-update-alerts turns it off.

It does not nag
---------------
A release whose CHANGELOG contains only a "### Docs" section changed no code and
raises nothing. Anything else raises INFO; a "### Security" section raises WARNING.

The CHANGELOG's own section headings are the signal, and a security fix anywhere in
the range escalates the whole span -- a docs-only release sitting on top of a
security fix still reports as security rather than hiding it.

Why an AlertSource and not midclt
----------------------------------
TrueNAS cannot raise an alert from the CLI. midclt exposes only alert.dismiss,
alert.list, alert.list_categories, alert.list_policies and alert.restore -- alert
CREATION is internal to middlewared, and none of its ~60 one-shot classes is
generic enough to reuse. Registering an AlertSource is the only way.

It is also the least invasive thing this patch does. The providers and nested
modules both APPEND CODE TO STOCK middleware files; the alert source ADDS ONE FILE
and modifies none. It is the native mechanism -- the same one every built-in
TrueNAS alert uses -- and TrueNAS polls it itself, so there is no cron job and no
systemd timer.

- Fail-safe: every error path returns None; it cannot take middlewared down.
- Read-only: `git ls-remote` plus an HTTPS fetch of the CHANGELOG. It never writes
  to .git, so it cannot leave root-owned objects behind the way a `git fetch` from
  middlewared (running as root) would.
- Removed by uninstall.sh (mw_patch.revert_all).
- It only tells you; it never updates anything.

Verified against the real repo and remote, with middlewared stubbed:
  on v0.4.1, only a README-only v0.4.2 available -> NO ALERT
  on v0.4.0, v0.4.1 fixed real bugs             -> INFO
  on v0.3.2, v0.3.3 was the password fix        -> SECURITY / WARNING

139 tests, ruff and shellcheck -S style clean.
This commit is contained in:
flan
2026-07-13 16:45:26 +00:00
parent 345741e1f1
commit 4e0814028c
13 changed files with 514 additions and 8 deletions
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@@ -59,6 +59,7 @@ that capability natively. See [Native support](#if-truenas-adds-native-support).
| `patch/truecloud_nested.py` | Nested-dataset staging: plan, mount, verify, tear down, sweep snapshots. Also `… cleanup` as a CLI. |
| `patch/patch_ui.py` | Widens the Angular credential dropdown. Refuses to write a bundle whose parens it unbalanced. |
| `patch/create_task.py` | Create TrueCloud tasks with S3/B2 credentials; `verify` the patch state. |
| `patch/alert_source.py` | The TrueNAS alert for "an update is available". Installed into `middlewared/alert/source/`. |
| `patch/wait_restart.sh` | Waits for boot to actually settle before restarting middlewared. |
| `tools/release_notes.py` | Extracts a version's CHANGELOG section; enforces version consistency. Used by CI. |
@@ -433,6 +434,51 @@ The manual step *is* the safety gate. If you want convenience, watch the
[releases feed](https://github.com/sudolulo/truenas-truecloud-patch/releases);
don't automate the pull.
## Update alerts
When a newer release exists, the patch raises a **TrueNAS alert** (the bell in the
UI) telling you so. It's on by default and checks once a day.
```bash
bash install.sh --no-update-alerts # turn it off
bash install.sh --update-alerts # turn it back on
```
**It will not nag you about a README.** A release whose CHANGELOG contains only a
`### Docs` section changed no code, and raises nothing. Anything that touched the
system raises an INFO alert; a release with a `### Security` section raises a
WARNING. The CHANGELOG's own section headings are the signal, and a security fix
anywhere in the range escalates the whole span — a docs-only release on top of a
security fix still reports as security.
### How it works, and why it's built this way
TrueNAS **cannot raise an alert from the CLI** — `midclt` exposes only
`alert.dismiss`, `alert.list`, `alert.list_categories`, `alert.list_policies` and
`alert.restore`. Alert *creation* is internal to middlewared, and none of its ~60
one-shot alert classes is generic enough to reuse. So the only way to get a real
alert is to register an `AlertSource`, which is what `patch/alert_source.py` does.
That is also the **least invasive** thing this patch does:
| | |
|---|---|
| providers module | **modifies** stock files (appends code to `b2.py`, `restic.py`) |
| nested module | **modifies** stock files (3 middleware modules) |
| **update alert** | **adds one file. Modifies nothing.** |
It's the native mechanism — the same one every built-in TrueNAS alert uses — and
TrueNAS polls it itself, so there is no cron job and no systemd timer.
- **Fail-safe.** Every error path returns `None`. It cannot take middlewared down.
- **Read-only.** `git ls-remote` plus an HTTPS fetch of the CHANGELOG. It never
writes to `.git`, so it cannot leave root-owned objects behind the way a
`git fetch` from middlewared (which runs as root) would.
- **Removed by `uninstall.sh`.**
It only *tells* you. It never updates anything — see
[Why there is no auto-update](#why-there-is-no-auto-update).
## Creating a task via CLI
If the UI still shows only Storj after refreshing (e.g. the JS bundle pattern