Last commit july 5th

spa/node_modules/promise-call-limit/index.js

@@ -0,0 +1,52 @@
+const os = require('os')
+// availableParallelism available only since node v19, for older versions use
+// cpus() cpus() can return an empty list if /proc is not mounted, use 1 in
+// this case
+
+/* istanbul ignore next - version-specific workaround */
+const defLimit = 'availableParallelism' in os
+  ? os.availableParallelism()
+  : Math.max(1, os.cpus().length)
+
+const callLimit = (queue, limit = defLimit) => new Promise((res, rej) => {
+  let active = 0
+  let current = 0
+  const results = []
+
+  let rejected = false
+  const reject = er => {
+    if (rejected)
+      return
+    rejected = true
+    rej(er)
+  }
+
+  let resolved = false
+  const resolve = () => {
+    if (resolved || active > 0)
+      return
+    resolved = true
+    res(results)
+  }
+
+  const run = () => {
+    const c = current++
+    if (c >= queue.length) {
+      return resolve()
+    }
+
+    active ++
+    results[c] = queue[c]().then(result => {
+      active --
+      results[c] = result
+      run()
+      return result
+    }, reject)
+  }
+
+  for (let i = 0; i < limit; i++) {
+    run()
+  }
+})
+
+module.exports = callLimit