Orginize

packages/bare-os-booter/lib/host/bare-os-host-signals-bridge.js

@@ -0,0 +1,60 @@
+/**
+ * Maps host SIGINT into a process event for guest cancellation (optional `bare-signals` on Bare).
+ */
+
+/**
+ * @param {{ onSigint?: () => void }} [opts]
+ * @returns {Promise<() => void>} disposer
+ */
+export async function installBareOsHostSignalsBridge(opts = {}) {
+  const onSigint = typeof opts.onSigint === 'function' ? opts.onSigint : () => {}
+  /** @type {(() => void)[]} */
+  const disposers = []
+  try {
+    const mod = await import('bare-signals')
+    const Signal = mod.default
+    if (typeof Signal === 'function') {
+      const h = new Signal('SIGINT')
+      const fn = () => {
+        onSigint()
+      }
+      h.on('signal', fn)
+      h.start()
+      disposers.push(() => {
+        try {
+          void h.close()
+        } catch {
+          /* ignore */
+        }
+      })
+    }
+  } catch {
+    /* bare-signals optional (native binding) */
+  }
+  if (
+    disposers.length === 0 &&
+    globalThis.process &&
+    typeof globalThis.process.on === 'function'
+  ) {
+    const fn = () => {
+      onSigint()
+    }
+    globalThis.process.on('SIGINT', fn)
+    disposers.push(() => {
+      try {
+        globalThis.process.off('SIGINT', fn)
+      } catch {
+        /* ignore */
+      }
+    })
+  }
+  return () => {
+    for (const d of disposers) {
+      try {
+        d()
+      } catch {
+        /* ignore */
+      }
+    }
+  }
+}