workflow: setup eslint for prohibited syntax and globals

fix #1285

packages/compiler-core/src/compile.ts

@@ -3,7 +3,7 @@ import { baseParse } from './parse'
 import { transform, NodeTransform, DirectiveTransform } from './transform'
 import { generate, CodegenResult } from './codegen'
 import { RootNode } from './ast'
-import { isString } from '@vue/shared'
+import { isString, extend } from '@vue/shared'
 import { transformIf } from './transforms/vIf'
 import { transformFor } from './transforms/vFor'
 import { transformExpression } from './transforms/transformExpression'
@@ -80,21 +80,26 @@ export function baseCompile(
   const [nodeTransforms, directiveTransforms] = getBaseTransformPreset(
     prefixIdentifiers
   )
-  transform(ast, {
-    ...options,
-    prefixIdentifiers,
-    nodeTransforms: [
-      ...nodeTransforms,
-      ...(options.nodeTransforms || []) // user transforms
-    ],
-    directiveTransforms: {
-      ...directiveTransforms,
-      ...(options.directiveTransforms || {}) // user transforms
-    }
-  })
+  transform(
+    ast,
+    extend({}, options, {
+      prefixIdentifiers,
+      nodeTransforms: [
+        ...nodeTransforms,
+        ...(options.nodeTransforms || []) // user transforms
+      ],
+      directiveTransforms: extend(
+        {},
+        directiveTransforms,
+        options.directiveTransforms || {} // user transforms
+      )
+    })
+  )
 
-  return generate(ast, {
-    ...options,
-    prefixIdentifiers
-  })
+  return generate(
+    ast,
+    extend({}, options, {
+      prefixIdentifiers
+    })
+  )
 }

packages/compiler-core/src/parse.ts

@@ -1,5 +1,5 @@
 import { ParserOptions } from './options'
-import { NO, isArray, makeMap } from '@vue/shared'
+import { NO, isArray, makeMap, extend } from '@vue/shared'
 import { ErrorCodes, createCompilerError, defaultOnError } from './errors'
 import {
   assert,
@@ -24,7 +24,6 @@ import {
   InterpolationNode,
   createRoot
 } from './ast'
-import { extend } from '@vue/shared'
 
 type OptionalOptions = 'isNativeTag' | 'isBuiltInComponent'
 type MergedParserOptions = Omit<Required<ParserOptions>, OptionalOptions> &
@@ -91,10 +90,7 @@ function createParserContext(
   options: ParserOptions
 ): ParserContext {
   return {
-    options: {
-      ...defaultParserOptions,
-      ...options
-    },
+    options: extend({}, defaultParserOptions, options),
     column: 1,
     line: 1,
     offset: 0,

packages/compiler-core/src/utils.ts

@@ -30,7 +30,7 @@ import {
   KEEP_ALIVE,
   BASE_TRANSITION
 } from './runtimeHelpers'
-import { isString, isObject, hyphenate } from '@vue/shared'
+import { isString, isObject, hyphenate, extend } from '@vue/shared'
 import { parse } from '@babel/parser'
 import { walk } from 'estree-walker'
 import { Node } from '@babel/types'
@@ -119,7 +119,11 @@ export function advancePositionWithClone(
   source: string,
   numberOfCharacters: number = source.length
 ): Position {
-  return advancePositionWithMutation({ ...pos }, source, numberOfCharacters)
+  return advancePositionWithMutation(
+    extend({}, pos),
+    source,
+    numberOfCharacters
+  )
 }
 
 // advance by mutation without cloning (for performance reasons), since this