feat: merge pagesJson

.gitignore

@@ -7,3 +7,4 @@ temp
 explorations
 TODOs.md
 *.log
+.history

packages/uni-cli-shared/src/pagesJson.ts

+type Data = Record<string, any>
+
+interface Customizer {
+  (a: unknown, b: unknown, k: string): unknown
+}
+
+const isArray = Array.isArray
+
+function isPlainObject(a: unknown): a is Data {
+  if (a === null) {
+    return false
+  }
+  return typeof a === 'object'
+}
+
+function mergeWith(objects: Data[], customizer: Customizer) {
+  const [first, ...rest] = objects
+  let ret = first
+  rest.forEach(a => {
+    ret = mergeTo(ret, a, customizer)
+  })
+  return ret
+}
+
+function mergeTo(a: Data, b: Data, customizer: Customizer) {
+  const ret: Data = {}
+  Object.keys(a)
+    .concat(Object.keys(b))
+    .forEach(k => {
+      const v = customizer(a[k], b[k], k)
+      ret[k] = typeof v === 'undefined' ? a[k] : v
+    })
+  return ret
+}
+
+function mergeWithRule(a: Data[], b: Data[], k: string, matchField: string) {
+  if (!isArray(a)) {
+    return a
+  }
+  const bMatchItems: Data[] = []
+  const ret = a.map(aItem => {
+    if (!matchField) {
+      return aItem
+    }
+    // 暂不考虑重复
+    const bMatchItem = b.find(bItem => aItem[matchField] === bItem[matchField])
+    if (bMatchItem) {
+      bMatchItems.push(bMatchItem)
+      return mergeWith([aItem, bMatchItem], createCustomizer(k))
+    }
+    return aItem
+  })
+  return ret.concat(b.filter(bItem => !bMatchItems.includes(bItem)))
+}
+
+function customizeArray(a: any[], b: any[], k: string) {
+  if (k === 'pages' || k === 'subPackages.pages') {
+    return mergeWithRule(a, b, k, 'path')
+  } else if (k === 'subPackages') {
+    return mergeWithRule(a, b, k, 'root')
+  }
+  return b
+}
+
+function customizeObject(a: Data, b: Data, k: string) {
+  return mergeWith([a, b], createCustomizer(k))
+}
+
+function createCustomizer(key?: string): Customizer {
+  return function customizer(a: unknown, b: unknown, k: string) {
+    const newKey = key ? `${key}.${k}` : k
+
+    if (isArray(a) && isArray(b)) {
+      return customizeArray(a, b, newKey)
+    }
+    if (isPlainObject(a) && isPlainObject(b)) {
+      return customizeObject(a, b, newKey)
+    }
+    return b
+  }
+}
+
+export default function merge(pagesJsons: any[]) {
+  return mergeWith(pagesJsons, createCustomizer())
+}