chore: import upstream snapshot with attribution

2026-07-13 12:44:08 +08:00
commit 983960e2dd
1244 changed files with 281996 additions and 0 deletions
@@ -0,0 +1,41 @@
+function isPlainObject(value) {
+  return (
+    value !== null &&
+    typeof value === 'object' &&
+    !Array.isArray(value)
+  )
+}
+
+/**
+ * Merge default settings into existing settings without overwriting user values.
+ */
+export function mergeMissingSettings(defaultSettings, existingSettings) {
+  if (!isPlainObject(defaultSettings)) {
+    return isPlainObject(existingSettings) ? existingSettings : {}
+  }
+
+  if (!isPlainObject(existingSettings)) {
+    return defaultSettings
+  }
+
+  const mergedSettings = { ...existingSettings }
+
+  for (const [key, defaultValue] of Object.entries(defaultSettings)) {
+    if (!Object.hasOwn(existingSettings, key)) {
+      mergedSettings[key] = defaultValue
+      continue
+    }
+
+    if (
+      isPlainObject(defaultValue) &&
+      isPlainObject(existingSettings[key])
+    ) {
+      mergedSettings[key] = mergeMissingSettings(
+        defaultValue,
+        existingSettings[key]
+      )
+    }
+  }
+
+  return mergedSettings
+}