77 lines
3.6 KiB
Markdown
77 lines
3.6 KiB
Markdown
# ShaCraft Launcher architecture
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## Current capability
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The launcher persists local settings, synchronises Aeronautics mod/config
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files from the signed ShaCraft v2 manifest, installs the exact Minecraft +
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NeoForge version the manifest specifies, and launches the game. A player
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signs in with the same local ShaCraft account used on the website. The game
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identity is derived only from that account's verified Aeronautics nickname;
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the legacy editable nickname setting is not trusted at launch.
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The interface also shows a live Aeronautics player count from the fixed,
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read-only `https://shacraft.ru/api/online/aoc` endpoint. It is display-only:
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the result never controls files, versions, URLs, or the launch command.
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Not yet implemented: a user-selectable profile directory, a "reset managed
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files only" recovery action, and signed cross-platform release builds of the
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launcher itself. Do not represent these as completed in UI or release notes.
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## Data flow
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Two independent pipelines feed one launch:
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```text
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ShaCraft manifest (mods/config + which MC/loader/Java version to use)
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signed-manifest endpoint -> Ed25519 verification (remote.rs)
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-> manifest schema + URL/path validation (manifest.rs)
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-> temporary download, SHA-256 verification, atomic replacement (profile.rs)
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Game itself (never controlled by the manifest above)
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Mojang version manifest -> SHA-1-verified version JSON (mojang.rs)
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-> Java 21 via Adoptium if none installed (runtime.rs)
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-> NeoForge's own installer, run headlessly (neoforge.rs)
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-> generic inheritsFrom merge of the two version JSONs (mojang.rs)
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-> SHA-1-verified merged libraries + platform natives (mojang.rs)
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-> verified ShaCraft account link (shacraft_account.rs)
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-> deterministic offline UUID for the linked nickname (session.rs)
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-> java process spawned with the merged classpath/args (launch.rs)
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```
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Profiles (ShaCraft-managed mods/config, and the player's own worlds/
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screenshots/resourcepacks) live below Tauri's `app_data_dir()/profiles/
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<profile-id>` — this becomes `--gameDir`. The shared vanilla+NeoForge
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install (versions/libraries/assets/runtime, reused across profiles that
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target the same Minecraft version) lives at `app_data_dir()/game`. Settings
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live at `app_data_dir()/settings.json`, and the revocable ShaCraft session at
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`app_data_dir()/shacraft-session` (mode 600 on Unix). Passwords are never
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written to disk. None of these should be assumed to
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be the system `.minecraft` directory.
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## Aeronautics contract
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- Profile ID: `aeronautics`
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- Manifest endpoint:
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`https://shacraft.ru/api/launcher/v2/profiles/aeronautics/signed-manifest`
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- Payload: manifest schema v1; also carries `minecraft.{version, loader,
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javaMajor}` (currently 1.21.1, NeoForge 21.1.248, Java 21) — the launcher
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reads this rather than hardcoding it, so a server-side version bump needs
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no launcher release.
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- ShaCraft download files: HTTPS only, exact hosts `shacraft.ru` and
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`cdn.shacraft.ru`.
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- Account API origin: fixed `https://shacraft.ru`; redirects are rejected.
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- Launch identity: the most recently verified `aoc` nickname returned by the
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authenticated account API. Local nickname edits cannot select an identity.
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## Planned but not implemented
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1. User-selectable profile directory and structured launcher logs.
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2. "Reset managed files only" recovery action that doesn't touch player
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worlds/screenshots/resourcepacks.
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3. Signed, cross-platform release builds of the launcher itself.
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4. Real per-stage byte progress for the Java/NeoForge install steps
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(currently start/done only — the dominant, user-visible wait, asset
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downloading, already reports real bytes).
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Do not represent these as completed features in UI or release notes.
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