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refactor: Eliminated global TZ cache

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The configured timezone (or local) is now set on Site directly.
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Spencer Brower
2026-07-24 11:32:47 -04:00
parent 4f09312daf
commit 75a7d7a14b
9 changed files with 114 additions and 144 deletions
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mustache/EXTENSIONS.md
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@@ -67,6 +67,26 @@ Takes an optional arg for the Go reference-date layout to use:
- A bare key, resolved from context like any other field: `{{date | format long}}` uses the value of `long` (e.g. a site-config field) as the layout.
- No arg: falls back to the `date_format` context key (typically `date.format` from `thor.json`).
#### Timezone conversion
When the `timezone` context key is set (typically `date.timezone` from `thor.json`, an IANA name like `"America/New_York"`), the `format` pipe converts dates to that timezone before formatting:
- **Date has offset + target tz**: adjusts to true UTC, then converts to the target timezone (DST-aware).
- **Date has no offset + target tz**: assumes the date is already in the target timezone — no conversion, only resolves the abbreviation.
- **Date has offset + no target tz**: displays in the source offset.
- **Date has no offset + no target tz**: displays as-is, assumes UTC.
The `MST` token reflects the active timezone:
| Config tz | ISO has offset | `MST` output |
|---|---|---|
| `"America/New_York"` | yes | `"EST"` or `"EDT"` (DST-aware) |
| `"America/New_York"` | no | `"EST"` or `"EDT"` |
| not set | yes | `"UTC-04:00"` (from source offset) |
| not set | no | `"UTC"` |
Timezone data is loaded once by `init_site` via `core:time/timezone.region_load`, using the site arena allocator. The resolved `^datetime.TZ_Region` pointer is stored on `Site.tz` and passed to templates through `Base_Data.timezone`. The arena frees it automatically on `destroy_site`.
### Memory ownership
- **Parsed pipe filters** (`Pipe_Filter` values) are stored inline on each `Node` via `[dynamic; MAX_PIPES]Pipe_Filter`, and `args` is inline on each `Pipe_Filter` via `[dynamic; MAX_PIPE_ARGS]string`. Both use Odin's fixed-capacity dynamic array type, so no per-tag heap allocations occur at parse time. The storage dies with the `Template` when `delete_template` is called.