Hermes-agent

2026-06-14 14:30:48 -04:00
commit dac4b88b94
5058 changed files with 1884848 additions and 0 deletions
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+const _READY_RE = /^HERMES_DASHBOARD_READY port=(\d+)/m
+
+/**
+ * Watch a child process's stdout for the `HERMES_DASHBOARD_READY port=<N>`
+ * line that web_server.py prints after uvicorn binds its socket.
+ *
+ * Returns the parsed port. Rejects if:
+ *   - the child exits before emitting the line
+ *   - the child emits an `error` event
+ *   - no line arrives within the timeout
+ *
+ * A single `cleanup()` tears down every listener (data/exit/error/timeout)
+ * on every terminal path — resolve, reject, or timeout — so repeated
+ * backend spawns don't leak listener slots on the child.
+ */
+function waitForDashboardPort(child, timeoutMs = 45_000) {
+  return new Promise((resolve, reject) => {
+    let buf = ''
+    let done = false
+
+    function cleanup() {
+      if (done) return
+      done = true
+      clearTimeout(timer)
+      child.stdout.off('data', onData)
+      child.off('exit', onExit)
+      child.off('error', onError)
+    }
+
+    function onData(chunk) {
+      buf += chunk.toString()
+      let nl
+      while ((nl = buf.indexOf('\n')) !== -1) {
+        const line = buf.slice(0, nl)
+        buf = buf.slice(nl + 1)
+        const m = line.match(_READY_RE)
+        if (m) {
+          cleanup()
+          resolve(parseInt(m[1], 10))
+          return
+        }
+      }
+    }
+
+    function onExit(code, signal) {
+      cleanup()
+      reject(new Error(`Hermes backend: exited before port announcement (${signal || code})`))
+    }
+
+    function onError(err) {
+      cleanup()
+      reject(err)
+    }
+
+    const timer = setTimeout(() => {
+      cleanup()
+      reject(new Error(`Timed out waiting for Hermes backend port announcement (${timeoutMs}ms)`))
+    }, timeoutMs)
+
+    child.stdout.on('data', onData)
+    child.on('exit', onExit)
+    child.on('error', onError)
+  })
+}
+
+module.exports = { waitForDashboardPort }