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[docs](trx-rs): generate the example config and correct the manual

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trx-rs.toml.example was maintained by hand and had fallen well behind: no
[[rigs]], no [[remotes]], no [timeouts], no bandplan or decode-history
settings, and a [frontends.http].default_rig_id that had been renamed.

Generate it from the config structs instead, so a new field shows up the moment
it exists, and add a test that fails when the checked-in copy drifts:

    cargo run -p trx-config --example generate_example

Section comments come from a small table; a section without an entry is still
emitted, so forgetting a comment can never drop a setting from the example.

The manual was wrong about the basics.  It listed five config search paths, none
of which the loader has ever looked at (the real order is ./trx-rs.toml → XDG →
/etc), called --print-config output "fully commented" when it carries no
comments at all, and documented a TRX_PLUGIN_DIRS variable no code reads.  It
also still described [frontends.rigctl].port as the bind port years after
rig_ports replaced it.  Fixed, and the new configuration features are written
up alongside.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SyX26FCpMQxiBoC7r5K1A7
Signed-off-by: Stan Grams <sjg@haxx.space>
This commit is contained in:
sjg
2026-08-06 21:32:46 +02:00
co-authored by Claude Opus 5
parent 76bcce8c54
commit cfaeb6ee15
10 changed files with 573 additions and 47 deletions
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docs/User-Manual.md
+133 -22
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@@ -17,30 +17,61 @@ frontends.
## Configuration
Both `trx-server` and `trx-client` use TOML configuration files. Use
`--print-config` to generate a fully commented example.
Both `trx-server` and `trx-client` read TOML. The server takes its settings
from the `[trx-server]` section and the client from `[trx-client]`, so one
`trx-rs.toml` can configure both — or each may live in its own file with the
section header left off.
`trx-rs.toml.example` in the repository root is a complete, commented example
generated from the config definitions themselves. `--print-config` prints the
same settings without the comments.
### File Locations
**trx-server** lookup order:
1. `--config <FILE>`
2. `./trx-server.toml`
3. `~/.trx-server.toml`
4. `~/.config/trx-rs/server.toml`
5. `/etc/trx-rs/server.toml`
Both binaries use the same lookup order:
**trx-client** lookup order:
1. `--config <FILE>`
2. `./trx-client.toml`
3. `~/.config/trx-rs/client.toml`
4. `/etc/trx-rs/client.toml`
2. `./trx-rs.toml`
3. `~/.config/trx-rs/trx-rs.toml`
4. `/etc/trx-rs/trx-rs.toml`
CLI arguments override config file values.
### Environment Variables
### Checking a Config
- `TRX_PLUGIN_DIRS`: additional plugin directories (path-separated), used by
both server and client.
`--check-config` loads the file, reports every problem it finds — unknown keys,
invalid values, listeners fighting over a port — and exits without starting
anything:
```bash
trx-server --check-config --config trx-rs.toml
trx-client --check-config --config trx-rs.toml
```
Unknown keys are warnings by default, so a config written for a newer version
still runs on an older binary. `--strict-config` makes them fatal.
`trx-configurator --check <FILE>` runs the same checks.
### Environment Variables and Secrets
Any string in the config may reference an environment variable as `${VAR}`;
an unset variable is an error rather than an empty value.
Credentials can be kept out of the config entirely by pointing at a file
instead. Every secret has a `*_file` sibling — set one or the other, never
both:
| Inline key | File key | Contents |
|------------|----------|----------|
| `[listen.auth].tokens` | `tokens_file` | one token per line |
| `[[remotes]].auth.token` | `token_file` | the token |
| `[frontends.http.auth].rx_passphrase` | `rx_passphrase_file` | the passphrase |
| `[frontends.http.auth].control_passphrase` | `control_passphrase_file` | the passphrase |
| `[frontends.http_json.auth].tokens` | `tokens_file` | one token per line |
Blank lines and `#` comments are ignored in the list files. A config that holds
credentials inline and is readable by group or others is flagged at startup.
### Server Options
@@ -96,6 +127,7 @@ CLI arguments override config file values.
| Field | Type | Default | Description |
|-------|------|---------|-------------|
| `tokens` | string[] | `[]` | Allowed auth tokens (empty = no auth) |
| `tokens_file` | string | — | Read tokens from this file, one per line |
#### `[audio]`
@@ -197,6 +229,29 @@ Notes:
Files are appended in JSON Lines format. Supported date tokens: `%YYYY%`,
`%MM%`, `%DD%` (UTC).
#### `[decoders]`
| Field | Type | Default | Description |
|-------|------|---------|-------------|
| `enabled` | string[] | all decoders | Decoders to run for this rig |
| `output_dir` | string | `"$XDG_CACHE_HOME/trx-rs"` | Base directory for decoders that write images |
Valid decoder names: `aprs`, `aprs_hf`, `ais`, `cw`, `ft2`, `ft4`, `ft8`,
`lrpt`, `sstv`, `vdes`, `wefax`, `wspr` — the same names `[[sdr.channels]]`
uses. An unrecognised name is a config error.
Every decoder runs by default, which costs real CPU on a small machine. On a
station that only works digital modes, listing just what you use is worth it:
```toml
[decoders]
enabled = ["ft8", "ft4", "wspr"]
```
`sstv`, `wefax` and `lrpt` write images into a subdirectory of `output_dir`
named after the decoder. `ais` and `vdes` additionally require an SDR channel
configured to feed them.
#### Multi-Rig Configuration
Use `[[rigs]]` arrays instead of the flat `[rig]` section for multi-rig setups:
@@ -246,6 +301,25 @@ Rigs without an explicit `id` get auto-generated IDs like `ft817_0`, `soapysdr_1
| Field | Type | Default | Description |
|-------|------|---------|-------------|
| `token` | string | — | Auth token (must not be empty if set) |
| `token_file` | string | — | Read the token from this file instead |
#### `[[remotes]]`
Preferred over the single `[remote]` section: one entry per rig, each mapping a
short name to a server and an optional server-side rig id.
| Field | Type | Default | Description |
|-------|------|---------|-------------|
| `name` | string | — | Short name used everywhere in the client |
| `url` | string | — | Server address (`host:port`) |
| `rig_id` | string | — | Rig id on a multi-rig server |
| `auth.token` | string | — | Auth token |
| `auth.token_file` | string | — | Read the token from this file instead |
| `poll_interval_ms` | u64 | `750` | State poll interval |
The `name` is the key used by `default_rig_name`, `rigctl.rig_ports`,
`audio.rig_urls`, `audio.rig_ports` and `decode_history_retention_min_by_rig`.
A name in any of those maps that no remote answers to is a config error.
#### `[frontends.http]`
@@ -254,6 +328,31 @@ Rigs without an explicit `id` get auto-generated IDs like `ft817_0`, `soapysdr_1
| `enabled` | bool | `true` | Enable web UI |
| `listen` | ip | `127.0.0.1` | Bind address |
| `port` | u16 | `8080` | Bind port |
| `default_rig_name` | string | — | Remote selected on startup |
| `initial_map_zoom` | u8 | `10` | Starting zoom for the APRS map |
| `show_sdr_gain_control` | bool | `true` | Expose the RF gain control |
| `bandplan_enabled` | bool | `true` | Show the bandplan strip |
| `bandplan_region` | string | `"iaru_r1"` | `iaru_r1`, `iaru_r2`, or `iaru_r3` |
| `decode_history_retention_min` | u64 | `1440` | Decode history retention |
| `decode_history_retention_min_by_rig` | table | `{}` | Per-remote retention override |
| `spectrum_coverage_margin_hz` | u32 | `50000` | Centre-retune guard margin |
| `spectrum_usable_span_ratio` | f32 | `0.92` | Usable fraction of the sampled span |
#### `[frontends.http.auth]`
| Field | Type | Default | Description |
|-------|------|---------|-------------|
| `enabled` | bool | `false` | Require a passphrase |
| `rx_passphrase` | string | — | Passphrase granting receive-only access |
| `rx_passphrase_file` | string | — | Read it from this file instead |
| `control_passphrase` | string | — | Passphrase granting full control |
| `control_passphrase_file` | string | — | Read it from this file instead |
| `tx_access_control_enabled` | bool | `true` | Hide TX from unauthenticated users |
| `session_ttl_min` | u64 | `480` | Session lifetime |
| `cookie_secure` | bool | `false` | Set Secure on the session cookie (needs HTTPS) |
| `cookie_same_site` | string | `"Lax"` | `Strict`, `Lax`, or `None` |
With `enabled = true`, at least one passphrase must be set.
#### `[frontends.rigctl]`
@@ -261,7 +360,11 @@ Rigs without an explicit `id` get auto-generated IDs like `ft817_0`, `soapysdr_1
|-------|------|---------|-------------|
| `enabled` | bool | `false` | Enable Hamlib rigctl |
| `listen` | ip | `127.0.0.1` | Bind address |
| `port` | u16 | `4532` | Bind port |
| `rig_ports` | table | `{}` | Remote name → local port; one listener each |
One listener is started per `rig_ports` entry, each routing to its rig, so
`rig_ports` must name at least one remote when the frontend is enabled. The
older single `port` key and `--rigctl-port` are ignored.
#### `[frontends.http_json]`
@@ -271,13 +374,17 @@ Rigs without an explicit `id` get auto-generated IDs like `ft817_0`, `soapysdr_1
| `listen` | ip | `127.0.0.1` | Bind address |
| `port` | u16 | `0` | Bind port (0 = ephemeral) |
| `auth.tokens` | string[] | `[]` | Allowed auth tokens |
| `auth.tokens_file` | string | — | Read tokens from this file, one per line |
#### `[frontends.audio]`
| Field | Type | Default | Description |
|-------|------|---------|-------------|
| `enabled` | bool | `true` | Enable audio client |
| `server_port` | u16 | `4531` | Server audio port |
| `server_url` | string | — | Audio endpoint for every remote |
| `rig_urls` | table | `{}` | Remote name → audio URL (wins over `server_url`) |
| `server_port` | u16 | `4531` | Fallback port when no URL is configured |
| `rig_ports` | table | `{}` | Remote name → port; superseded by `rig_urls` |
| `bridge.enabled` | bool | `false` | Enable local CPAL audio bridge |
| `bridge.rx_output_device` | string | — | Local playback device |
| `bridge.tx_input_device` | string | — | Local capture device |
@@ -290,13 +397,17 @@ loopback on Linux, BlackHole on macOS).
### CLI Override Summary
**trx-server:**
`--config`, `--print-config`, `--rig`, `--access`, `--callsign`, `--listen`,
`--port`. SDR options are file-only.
`--config`, `--print-config`, `--check-config`, `--strict-config`, `--rig`,
`--access`, `--callsign`, `--listen`, `--port`. SDR options are file-only.
**trx-client:**
`--config`, `--print-config`, `--url`, `--token`, `--poll-interval`,
`--frontend`, `--http-listen`, `--http-port`, `--rigctl-listen`,
`--rigctl-port`, `--http-json-listen`, `--http-json-port`, `--callsign`.
`--config`, `--print-config`, `--check-config`, `--strict-config`, `--url`,
`--token`, `--poll-interval`, `--rig-id`, `--frontend`, `--http-listen`,
`--http-port`, `--rigctl-listen`, `--http-json-listen`, `--http-json-port`,
`--callsign`.
`--listen` on the server overrides the bind address of both the control
listener and every rig's audio listener.
---