feat: implement delete-key-attribute transformation

Author: ygj6

vue-transformations/__test__/v-else-if-key.spec.ts

@@ -0,0 +1,9 @@
+import { runTest } from '../../src/testUtils'
+
+runTest(
+  'Delete the key attribute at the same level as if/else/else-if ',
+  'v-else-if-key',
+  'v-else-if-key',
+  'vue',
+  'vue'
+)

vue-transformations/__testfixtures__/v-else-if-key/v-else-if-key.input.vue

@@ -0,0 +1,7 @@
+<template>
+  <div id="app">
+    <div v-if="condition" key="yes">Yes</div>
+    <div v-else-if="condition1" key="no">No</div>
+    <div v-else key="no">No</div>
+  </div>
+</template>

vue-transformations/__testfixtures__/v-else-if-key/v-else-if-key.output.vue

@@ -0,0 +1,7 @@
+<template>
+  <div id="app">
+    <div v-if="condition" >Yes</div>
+    <div v-else-if="condition1" >No</div>
+    <div v-else >No</div>
+  </div>
+</template>

vue-transformations/v-else-if-key.ts

@@ -0,0 +1,84 @@
+import * as OperationUtils from '../src/operationUtils'
+import * as parser from 'vue-eslint-parser'
+import type { Node } from 'vue-eslint-parser/ast/nodes'
+import type { Operation } from '../src/operationUtils'
+import type { VueASTTransformation } from '../src/wrapVueTransformation'
+import wrap from '../src/wrapVueTransformation'
+
+/**
+ * 每一个实际的规则，需要做以下几件事：
+ * 1、findNodes(fileInfo, ast): 寻找匹配规则的节点
+ * 2、fix(nodes): 完善匹配节点的增删改逻辑
+ * 3、applyFix(fileInfo, tempFixes): 执行fixer，对源码进行增删改，并返回转换后的代码
+ * @param context
+ */
+
+export const transformAST: VueASTTransformation = (context) => {
+  let fixOperations: Operation[] = []
+  const toFixNodes: Node[] = findNodes(context)
+  toFixNodes.forEach((node) => {
+    // fix(node) 返回的为 Operation 数组，因此用 concat 合并多个数组
+    fixOperations = fixOperations.concat(fix(node))
+  })
+  return fixOperations
+}
+
+export default wrap(transformAST)
+/**
+ * 定位 slot attribute 节点
+ *
+ * @param context { file: FileInfo, api: API }
+ * @param templateBody
+ * @returns 所有的 slot attribute 节点
+ */
+function findNodes(context: any): Node[] {
+  const { file } = context
+  const source = file.source
+  const options = { sourceType: 'module' }
+  const ast = parser.parse(source, options)
+  let toFixNodes: Node[] = []
+  let root: Node = <Node>ast.templateBody // 强制类型转换
+  parser.AST.traverseNodes(root, {
+    enterNode(node: Node) {
+      if (
+        node.type === 'VAttribute' &&
+        node.key.type === 'VIdentifier' &&
+        node.key.name === 'key'
+      ) {
+        toFixNodes.push(node)
+      }
+    },
+    leaveNode(node: Node) {},
+  })
+  return toFixNodes
+}
+/**
+ * The repair logic for
+ * @param node The Target Node
+ */
+function fix(node: any): Operation[] {
+  let fixOperations: Operation[] = []
+  const target: any = node!.parent!.parent
+
+  // The current node has no attribute that is v-for
+  let havaBrotherAttr: boolean = false
+  target.startTag.attributes
+    .filter(
+      (attr: any) =>
+        attr.type === 'VAttribute' &&
+        attr.key.type === 'VDirectiveKey' &&
+        (attr.key.name.name === 'if' ||
+          attr.key.name.name === 'else-if' ||
+          attr.key.name.name === 'else')
+    )
+    .forEach((element: any) => {
+      havaBrotherAttr = true
+    })
+  if (!havaBrotherAttr) {
+    return fixOperations
+  }
+
+  fixOperations.push(OperationUtils.remove(node))
+
+  return fixOperations
+}