97 lines
4.2 KiB
Plaintext
97 lines
4.2 KiB
Plaintext
-- allium: 1
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-- Headless Server Mode (issue #26, phase 1)
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-- Scope: extension (client/server split — SSH transport for TUI and GUI)
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-- Distilled from: lib/bds/server.ex, lib/bds/application.ex, lib/bds/tui.ex
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entity BootMode {
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kind: desktop | server | tui
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-- Resolved from the BDS_MODE environment variable at application start.
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-- "server" is headless; "tui" is the headless server plus a TUI on the
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-- launching terminal; anything else is desktop.
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}
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entity SshKeyMaterial {
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dir: String -- <data dir>/ssh, next to the database
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host_key: String -- ssh_host_rsa_key, generated on first boot
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authorized_keys: String -- created empty (mode 600) on first boot
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-- Invariant: key material lives in the private app data dir,
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-- never in the repo or an application priv dir.
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}
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surface ServerRuntimeSurface {
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facing _: ServerRuntime
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provides:
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ApplicationStarted(mode)
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SshClientConnected()
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GuiConnectRequested()
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}
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rule ModeResolution {
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when: ApplicationStarted(mode)
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-- BDS_MODE environment variable decides the mode once per boot.
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-- Fallback (issue #33): resolved desktop mode boots as tui when no
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-- graphical session is available, so the app always opens a UI
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-- rather than crashing wx; a log line records the switch. Headless
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-- means: non-Darwin unix without DISPLAY/WAYLAND_DISPLAY (plain ssh
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-- included; ssh -X with a forwarded display keeps the GUI), or macOS
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-- inside an ssh session (SSH_CONNECTION/SSH_CLIENT/SSH_TTY — macOS
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-- never sets DISPLAY). Explicit server/tui modes and Windows are
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-- never rewritten. Because the :desktop dependency boots wx in its
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-- own application start, config/runtime.exs sets NO_WX=1 for every
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-- non-desktop effective mode (BDS.Server.prepare_boot_env) so the
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-- dependency starts inert before any BDS supervisor runs. In tui
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-- mode prepare_boot_env also silences every other terminal writer —
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-- the default logger handler moves to a rotating file in the private
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-- app dir and Bumblebee's model-download progress bar is disabled —
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-- because the TUI owns the terminal and each stray console line
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-- scrolls the alternate screen up one row. Desktop/server modes and
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-- SSH-served TUI sessions keep normal console logging.
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ensures: BootMode.created(kind: mode)
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}
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rule DesktopBoot {
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when: ApplicationStarted(mode)
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requires: mode = desktop
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-- Unchanged behavior: wx window shell, loopback HTTP endpoint.
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ensures: DesktopWindowStarted()
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}
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rule ServerBoot {
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when: ApplicationStarted(mode)
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requires: mode = server
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-- Started by `bds-cli server` or explicit desktop boot mode. Headless: no
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-- desktop UI children at all. Works on macOS, Windows, Linux.
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ensures: LoopbackEndpointStarted()
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-- HTTP endpoint stays bound to 127.0.0.1; never exposed directly
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ensures: CliSyncWatcherStarted()
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ensures: SshDaemonStarted()
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-- Public-key auth only (no passwords). Direct TCP/IP forwarding is
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-- restricted to the server-owned loopback endpoint; the native GUI
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-- protocol and terminal sessions use channels on the same connection.
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ensures: SshKeyMaterial.created()
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-- host key generated and authorized_keys touched on first boot only
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}
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rule GuiRemoteConnection {
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when: GuiConnectRequested()
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-- Desktop "Connect to Server…": SSH connects with the same public keys
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-- (client identity + known_hosts in the private ssh dir), negotiates the
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-- versioned `ruds` subsystem, lists server projects, and opens the selected
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-- project through the shared CoreHost application-service operations. The
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-- channel carries ordered domain events, task snapshots, and the server UI
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-- locale. Request IDs make replayed writes exactly-once. Disconnect returns
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-- to the local project without exposing or copying the SQLite database.
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ensures: NativeRemoteProjectOpened()
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}
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rule TuiSession {
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when: SshClientConnected()
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-- Each SSH client gets its own TUI app instance on the server;
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-- only terminal cells cross the wire.
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ensures: TuiAppMounted()
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-- UI locale comes from the server-side UI language setting,
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-- identical for every client
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}
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