Keep lock for up to 30 seconds.

Author: RubenVerborgh

lib/lock.js

@@ -1,12 +1,25 @@
 const { lock } = require('proper-lockfile')
 
+const staleSeconds = 30
+
 // Obtains a lock on the path, and maintains it until the callback finishes
 async function withLock (path, options = {}, callback = options) {
-  const { mustExist } = options
-  const releaseLock = await lock(path, { retries: 10, realpath: !!mustExist })
+  // Obtain the lock
+  const releaseLock = await lock(path, {
+    retries: 10,
+    update: 1000,
+    stale: staleSeconds * 1000,
+    realpath: !!options.mustExist,
+    onCompromised: () => {
+      throw new Error(`The file at ${path} was not updated within ${staleSeconds}s.`)
+    }
+  })
+
+  // Try executing the callback, waiting for its returned promise to resolve
   try {
     return await callback()
   } finally {
+    // Ensure the lock is always released
     releaseLock()
   }
 }