From 0c2ea1c134aee2993e45e3bbfb63385e9bc25e75 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Sun, 22 Aug 2021 22:28:47 -0400
Subject: [PATCH] refactor(compiler-sfc): remove parseOnly mode

---
 .../compileScriptParseOnlyMode.spec.ts        |  87 ------------
 packages/compiler-sfc/src/compileScript.ts    | 126 +++---------------
 packages/compiler-sfc/src/parse.ts            |  20 ---
 3 files changed, 16 insertions(+), 217 deletions(-)
 delete mode 100644 packages/compiler-sfc/__tests__/compileScriptParseOnlyMode.spec.ts

diff --git a/packages/compiler-sfc/__tests__/compileScriptParseOnlyMode.spec.ts b/packages/compiler-sfc/__tests__/compileScriptParseOnlyMode.spec.ts
deleted file mode 100644
index 86a5a7bf00c..00000000000
--- a/packages/compiler-sfc/__tests__/compileScriptParseOnlyMode.spec.ts
+++ /dev/null
@@ -1,87 +0,0 @@
-import { TextRange } from '../src/parse'
-import { compileSFCScript } from './utils'
-
-describe('compileScript parseOnly mode', () => {
-  function compile(src: string) {
-    return compileSFCScript(src, { parseOnly: true })
-  }
-
-  function getRange(src: string, range: TextRange) {
-    return src.slice(range.start, range.end)
-  }
-
-  test('bindings', () => {
-    const scriptSrc = `
-    import { foo } from './x'
-    `
-    const scriptSetupSrc = `
-    import { bar } from './x'
-
-    const a = 123
-    function b() {}
-    class c {}
-    `
-    const src = `
-    <script>${scriptSrc}</script>
-    <script setup>${scriptSetupSrc}</script>
-    `
-    const { ranges } = compile(src)
-
-    expect(getRange(scriptSrc, ranges!.scriptBindings[0])).toBe('foo')
-    expect(
-      ranges!.scriptSetupBindings.map(r => getRange(scriptSetupSrc, r))
-    ).toMatchObject(['bar', 'a', 'b', 'c'])
-  })
-
-  test('defineProps', () => {
-    const src = `
-    defineProps({ foo: String })
-    `
-    const { ranges } = compile(`<script setup>${src}</script>`)
-    expect(getRange(src, ranges!.propsRuntimeArg!)).toBe(`{ foo: String }`)
-  })
-
-  test('defineProps (type)', () => {
-    const src = `
-    interface Props { x?: number }
-    defineProps<Props>()
-    `
-    const { ranges } = compile(`<script setup lang="ts">${src}</script>`)
-    expect(getRange(src, ranges!.propsTypeArg!)).toBe(`Props`)
-  })
-
-  test('withDefaults', () => {
-    const src = `
-    interface Props { x?: number }
-    withDefaults(defineProps<Props>(), { x: 1 })
-    `
-    const { ranges } = compile(`<script setup lang="ts">${src}</script>`)
-    expect(getRange(src, ranges!.withDefaultsArg!)).toBe(`{ x: 1 }`)
-  })
-
-  test('defineEmits', () => {
-    const src = `
-    defineEmits(['foo'])
-    `
-    const { ranges } = compile(`<script setup>${src}</script>`)
-    expect(getRange(src, ranges!.emitsRuntimeArg!)).toBe(`['foo']`)
-  })
-
-  test('defineEmits (type)', () => {
-    const src = `
-    defineEmits<{ (e: 'x'): void }>()
-    `
-    const { ranges } = compile(`<script setup lang="ts">${src}</script>`)
-    expect(getRange(src, ranges!.emitsTypeArg!)).toBe(`{ (e: 'x'): void }`)
-  })
-
-  test('no script setup block', () => {
-    const src = `import { x } from './x'`
-    const { ranges } = compile(`<script>${src}</script>`)
-    expect(getRange(src, ranges!.scriptBindings[0])).toBe(`x`)
-  })
-
-  test('no script block', () => {
-    expect(() => compile(`<style>hello</style>`)).not.toThrow()
-  })
-})
diff --git a/packages/compiler-sfc/src/compileScript.ts b/packages/compiler-sfc/src/compileScript.ts
index 8356d717883..9d1775407c9 100644
--- a/packages/compiler-sfc/src/compileScript.ts
+++ b/packages/compiler-sfc/src/compileScript.ts
@@ -3,7 +3,6 @@ import {
   BindingMetadata,
   BindingTypes,
   createRoot,
-  locStub,
   NodeTypes,
   transform,
   parserOptions,
@@ -12,12 +11,7 @@ import {
   isFunctionType,
   walkIdentifiers
 } from '@vue/compiler-dom'
-import {
-  ScriptSetupTextRanges,
-  SFCDescriptor,
-  SFCScriptBlock,
-  TextRange
-} from './parse'
+import { SFCDescriptor, SFCScriptBlock } from './parse'
 import { parse as _parse, ParserOptions, ParserPlugin } from '@babel/parser'
 import {
   babelParserDefaultPlugins,
@@ -103,28 +97,16 @@ export interface SFCScriptCompileOptions {
    * options passed to `compiler-dom`.
    */
   templateOptions?: Partial<SFCTemplateCompileOptions>
-  /**
-   * Skip codegen and only return AST / binding / text range information.
-   * Also makes the call error-tolerant.
-   * Used for IDE support.
-   */
-  parseOnly?: boolean
 }
 
 interface ImportBinding {
   isType: boolean
   imported: string
   source: string
-  rangeNode: Node
   isFromSetup: boolean
   isUsedInTemplate: boolean
 }
 
-interface VariableBinding {
-  type: BindingTypes
-  rangeNode: Node
-}
-
 /**
  * Compile `<script setup>`
  * It requires the whole SFC descriptor because we need to handle and merge
@@ -138,18 +120,6 @@ export function compileScript(
   // feature flags
   const enableRefSugar = !!options.refSugar
   let refBindings: string[] | undefined
-  const parseOnly = !!options.parseOnly
-
-  if (parseOnly && !scriptSetup) {
-    // in parse-only mode, construct a fake script setup so we still perform
-    // the full parse logic.
-    scriptSetup = {
-      type: 'script',
-      content: '',
-      attrs: {},
-      loc: locStub
-    }
-  }
 
   // for backwards compat
   if (!options) {
@@ -190,8 +160,7 @@ export function compileScript(
     try {
       const scriptAst = _parse(script.content, {
         plugins,
-        sourceType: 'module',
-        errorRecovery: parseOnly
+        sourceType: 'module'
       }).program.body
       const bindings = analyzeScriptBindings(scriptAst)
       let content = script.content
@@ -232,18 +201,11 @@ export function compileScript(
 
   // metadata that needs to be returned
   const bindingMetadata: BindingMetadata = {}
-  const ranges: ScriptSetupTextRanges | undefined = parseOnly
-    ? {
-        scriptBindings: [],
-        scriptSetupBindings: []
-      }
-    : undefined
-
   const defaultTempVar = `__default__`
   const helperImports: Set<string> = new Set()
   const userImports: Record<string, ImportBinding> = Object.create(null)
   const userImportAlias: Record<string, string> = Object.create(null)
-  const setupBindings: Record<string, VariableBinding> = Object.create(null)
+  const setupBindings: Record<string, BindingTypes> = Object.create(null)
 
   let defaultExport: Node | undefined
   let hasDefinePropsCall = false
@@ -288,7 +250,6 @@ export function compileScript(
     offset: number
   ): Program {
     try {
-      options.errorRecovery = parseOnly
       return _parse(input, options).program
     } catch (e) {
       e.message = `[@vue/compiler-sfc] ${e.message}\n\n${
@@ -317,8 +278,7 @@ export function compileScript(
     local: string,
     imported: string | false,
     isType: boolean,
-    isFromSetup: boolean,
-    rangeNode: Node
+    isFromSetup: boolean
   ) {
     if (source === 'vue' && imported) {
       userImportAlias[imported] = local
@@ -337,7 +297,6 @@ export function compileScript(
       isType,
       imported: imported || 'default',
       source,
-      rangeNode,
       isFromSetup,
       isUsedInTemplate
     }
@@ -609,8 +568,7 @@ export function compileScript(
             specifier.local.name,
             imported,
             node.importKind === 'type',
-            false,
-            specifier.local
+            false
           )
         }
       } else if (node.type === 'ExportDefaultDeclaration') {
@@ -705,8 +663,8 @@ export function compileScript(
     ) {
       error(
         `ref sugar using the label syntax was an experimental proposal and ` +
-          `has been dropped based on community feedback.`,
-        // TODO + ` Please check out the adjusted proposal at ...`,
+          `has been dropped based on community feedback. Please check out ` +
+          `the new proposal at https://github.com/vuejs/rfcs/discussions/369`,
         node
       )
     }
@@ -764,8 +722,7 @@ export function compileScript(
             local,
             imported,
             node.importKind === 'type',
-            true,
-            specifier.local
+            true
           )
         }
       }
@@ -897,44 +854,6 @@ export function compileScript(
     }
   }
 
-  // in parse only mode, we should have collected all the information we need,
-  // return early.
-  if (parseOnly) {
-    for (const key in userImports) {
-      const { rangeNode, isFromSetup } = userImports[key]
-      const bindings = isFromSetup
-        ? ranges!.scriptSetupBindings
-        : ranges!.scriptBindings
-      bindings.push(toTextRange(rangeNode))
-    }
-    for (const key in setupBindings) {
-      ranges!.scriptSetupBindings.push(
-        toTextRange(setupBindings[key].rangeNode)
-      )
-    }
-    if (propsRuntimeDecl) {
-      ranges!.propsRuntimeArg = toTextRange(propsRuntimeDecl)
-    }
-    if (propsTypeDeclRaw) {
-      ranges!.propsTypeArg = toTextRange(propsTypeDeclRaw)
-    }
-    if (emitsRuntimeDecl) {
-      ranges!.emitsRuntimeArg = toTextRange(emitsRuntimeDecl)
-    }
-    if (emitsTypeDeclRaw) {
-      ranges!.emitsTypeArg = toTextRange(emitsTypeDeclRaw)
-    }
-    if (propsRuntimeDefaults) {
-      ranges!.withDefaultsArg = toTextRange(propsRuntimeDefaults)
-    }
-    return {
-      ...scriptSetup,
-      ranges,
-      scriptAst: scriptAst?.body,
-      scriptSetupAst: scriptSetupAst?.body
-    }
-  }
-
   // 3. Apply ref sugar transform
   if (enableRefSugar) {
     warnExperimental(
@@ -1007,7 +926,7 @@ export function compileScript(
         : BindingTypes.SETUP_MAYBE_REF
   }
   for (const key in setupBindings) {
-    bindingMetadata[key] = setupBindings[key].type
+    bindingMetadata[key] = setupBindings[key]
   }
   // known ref bindings
   if (refBindings) {
@@ -1240,19 +1159,16 @@ export function compileScript(
 }
 
 function registerBinding(
-  bindings: Record<string, VariableBinding>,
+  bindings: Record<string, BindingTypes>,
   node: Identifier,
   type: BindingTypes
 ) {
-  bindings[node.name] = {
-    type,
-    rangeNode: node
-  }
+  bindings[node.name] = type
 }
 
 function walkDeclaration(
   node: Declaration,
-  bindings: Record<string, VariableBinding>,
+  bindings: Record<string, BindingTypes>,
   userImportAlias: Record<string, string>
 ) {
   if (node.type === 'VariableDeclaration') {
@@ -1301,16 +1217,13 @@ function walkDeclaration(
   ) {
     // export function foo() {} / export class Foo {}
     // export declarations must be named.
-    bindings[node.id!.name] = {
-      type: BindingTypes.SETUP_CONST,
-      rangeNode: node.id!
-    }
+    bindings[node.id!.name] = BindingTypes.SETUP_CONST
   }
 }
 
 function walkObjectPattern(
   node: ObjectPattern,
-  bindings: Record<string, VariableBinding>,
+  bindings: Record<string, BindingTypes>,
   isConst: boolean,
   isDefineCall = false
 ) {
@@ -1341,7 +1254,7 @@ function walkObjectPattern(
 
 function walkArrayPattern(
   node: ArrayPattern,
-  bindings: Record<string, VariableBinding>,
+  bindings: Record<string, BindingTypes>,
   isConst: boolean,
   isDefineCall = false
 ) {
@@ -1352,7 +1265,7 @@ function walkArrayPattern(
 
 function walkPattern(
   node: Node,
-  bindings: Record<string, VariableBinding>,
+  bindings: Record<string, BindingTypes>,
   isConst: boolean,
   isDefineCall = false
 ) {
@@ -1745,13 +1658,6 @@ function getObjectOrArrayExpressionKeys(value: Node): string[] {
   return []
 }
 
-function toTextRange(node: Node): TextRange {
-  return {
-    start: node.start!,
-    end: node.end!
-  }
-}
-
 const templateUsageCheckCache = createCache<string>()
 
 function resolveTemplateUsageCheckString(sfc: SFCDescriptor) {
diff --git a/packages/compiler-sfc/src/parse.ts b/packages/compiler-sfc/src/parse.ts
index 9192491fcae..83b5910b577 100644
--- a/packages/compiler-sfc/src/parse.ts
+++ b/packages/compiler-sfc/src/parse.ts
@@ -43,27 +43,7 @@ export interface SFCScriptBlock extends SFCBlock {
   bindings?: BindingMetadata
   scriptAst?: Statement[]
   scriptSetupAst?: Statement[]
-  ranges?: ScriptSetupTextRanges
 }
-
-/**
- * Text range data for IDE support
- */
-export interface ScriptSetupTextRanges {
-  scriptBindings: TextRange[]
-  scriptSetupBindings: TextRange[]
-  propsTypeArg?: TextRange
-  propsRuntimeArg?: TextRange
-  emitsTypeArg?: TextRange
-  emitsRuntimeArg?: TextRange
-  withDefaultsArg?: TextRange
-}
-
-export interface TextRange {
-  start: number
-  end: number
-}
-
 export interface SFCStyleBlock extends SFCBlock {
   type: 'style'
   scoped?: boolean