Add BSIPA bootstrap support

src/plugin_helper/bsipa.py

@@ -0,0 +1,47 @@
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Any
+
+from .fsutil import sha256_file
+from .state import bootstrap_state_path, load_bootstrap_state
+
+
+BSIPA_PLUGIN_ID = "bsipa"
+
+
+def latest_log_path(instance_path: Path) -> Path:
+    return instance_path / "Logs" / "_latest.log"
+
+
+def check_bsipa_health(instance_path: Path, state_root: Path, instance: str) -> dict[str, Any]:
+    state = load_bootstrap_state(state_root, instance)
+    messages: list[str] = []
+
+    required = ["IPA.exe", "winhttp.dll"]
+    for rel in required:
+        if not (instance_path / rel).is_file():
+            messages.append(f"missing {rel}")
+    for rel in ("IPA", "Libs"):
+        if not (instance_path / rel).is_dir():
+            messages.append(f"missing {rel}/")
+
+    log_path = latest_log_path(instance_path)
+    if not log_path.is_file():
+        messages.append("missing Logs/_latest.log")
+    else:
+        text = log_path.read_text(encoding="utf-8", errors="replace")
+        if "Beat Saber IPA (BSIPA):" not in text and "Beat Saber IPA" not in text:
+            messages.append("Logs/_latest.log does not show BSIPA startup")
+
+    if not state:
+        messages.append(f"missing bootstrap state: {bootstrap_state_path(state_root, instance)}")
+
+    return {
+        "ok": not messages,
+        "messages": messages,
+        "statePath": str(bootstrap_state_path(state_root, instance)),
+        "logPath": str(log_path),
+        "logSha256": sha256_file(log_path) if log_path.is_file() else None,
+        "bootstrapRecordedAt": state.get("updatedAt"),
+    }