https://gitlab.synchro.net/main/sbbs/-/commit/9598e4221151c459b5550e6e
Added Files:
xtrn/syncdawn/.gitignore fetch-assets.js install-xtrn.ini
Log Message:
syncdawn: xtrn installer bundle and freeware-asset fetcher

The xtrn/syncdawn/ bundle registers the SyncDawn door and fetches its game data:

- install-xtrn.ini: registers the campaign launcher (DOOR32.SYS, native,
binary I/O), cmd "syncdawn%. %f -home %juser/%4/tibdawn/". Tiberian Dawn
is campaign-only for a solo caller (no skirmish-vs-AI -- that arrived with
Red Alert), so there's no lobby/skirmish entry.

- fetch-assets.js: downloads the freeware C&C95 "Gold" game data (EA released
Tiberian Dawn as freeware) from a checksum-pinned archive.org item, verifies
its SHA-1, and extracts the MIX archives the engine needs -- the full set TD
registers (CCLOCAL/CONQUER/GENERAL/TRANSIT + the v1.06 hi-res UPDATE mixes,
the theaters, sounds, scores, speech, movies) renamed to the UPPERCASE names
the engine wants on a case-sensitive host. SpiderMonkey 1.8.5-compatible.
Mirrors xtrn/syncalert/fetch-assets.js in mechanism.

- .gitignore: keeps the built binary, the downloaded image, and the extracted
assets/ (the game data is not redistributed here) out of the repo.

SyncDawn ships no game data of its own -- the sysop fetches it (or drops the MIX files in by hand) at install time.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

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