feat(compiler-sfc): expose resolve type-based props and emits

packages/compiler-sfc/src/index.ts

@@ -33,6 +33,8 @@ export {
 
 // Internals for type resolution
 export { invalidateTypeCache, registerTS } from './script/resolveType'
+export { extractRuntimeProps } from './script/defineProps'
+export { extractRuntimeEmits } from './script/defineEmits'
 
 // Types
 export type {
@@ -58,6 +60,7 @@ export type { SFCScriptCompileOptions } from './compileScript'
 export type { ScriptCompileContext } from './script/context'
 export type {
   TypeResolveContext,
+  SimpleTypeResolveOptions,
   SimpleTypeResolveContext
 } from './script/resolveType'
 export type {

packages/compiler-sfc/src/script/defineEmits.ts

@@ -1,7 +1,11 @@
 import { Identifier, LVal, Node, RestElement } from '@babel/types'
 import { isCallOf } from './utils'
 import { ScriptCompileContext } from './context'
-import { resolveTypeElements, resolveUnionType } from './resolveType'
+import {
+  TypeResolveContext,
+  resolveTypeElements,
+  resolveUnionType
+} from './resolveType'
 
 export const DEFINE_EMITS = 'defineEmits'
 
@@ -57,7 +61,7 @@ export function genRuntimeEmits(ctx: ScriptCompileContext): string | undefined {
   return emitsDecl
 }
 
-function extractRuntimeEmits(ctx: ScriptCompileContext): Set<string> {
+export function extractRuntimeEmits(ctx: TypeResolveContext): Set<string> {
   const emits = new Set<string>()
   const node = ctx.emitsTypeDecl!
 
@@ -90,7 +94,7 @@ function extractRuntimeEmits(ctx: ScriptCompileContext): Set<string> {
 }
 
 function extractEventNames(
-  ctx: ScriptCompileContext,
+  ctx: TypeResolveContext,
   eventName: Identifier | RestElement,
   emits: Set<string>
 ) {

packages/compiler-sfc/src/script/defineProps.ts

@@ -8,7 +8,11 @@ import {
 } from '@babel/types'
 import { BindingTypes, isFunctionType } from '@vue/compiler-dom'
 import { ScriptCompileContext } from './context'
-import { inferRuntimeType, resolveTypeElements } from './resolveType'
+import {
+  TypeResolveContext,
+  inferRuntimeType,
+  resolveTypeElements
+} from './resolveType'
 import {
   resolveObjectKey,
   UNKNOWN_TYPE,
@@ -150,7 +154,7 @@ export function genRuntimeProps(ctx: ScriptCompileContext): string | undefined {
       }
     }
   } else if (ctx.propsTypeDecl) {
-    propsDecls = genRuntimePropsFromTypes(ctx)
+    propsDecls = extractRuntimeProps(ctx)
   }
 
   const modelsDecls = genModelProps(ctx)
@@ -162,7 +166,9 @@ export function genRuntimeProps(ctx: ScriptCompileContext): string | undefined {
   }
 }
 
-function genRuntimePropsFromTypes(ctx: ScriptCompileContext) {
+export function extractRuntimeProps(
+  ctx: TypeResolveContext
+): string | undefined {
   // this is only called if propsTypeDecl exists
   const props = resolveRuntimePropsFromType(ctx, ctx.propsTypeDecl!)
   if (!props.length) {
@@ -175,7 +181,7 @@ function genRuntimePropsFromTypes(ctx: ScriptCompileContext) {
   for (const prop of props) {
     propStrings.push(genRuntimePropFromType(ctx, prop, hasStaticDefaults))
     // register bindings
-    if (!(prop.key in ctx.bindingMetadata)) {
+    if ('bindingMetadata' in ctx && !(prop.key in ctx.bindingMetadata)) {
       ctx.bindingMetadata[prop.key] = BindingTypes.PROPS
     }
   }
@@ -193,7 +199,7 @@ function genRuntimePropsFromTypes(ctx: ScriptCompileContext) {
 }
 
 function resolveRuntimePropsFromType(
-  ctx: ScriptCompileContext,
+  ctx: TypeResolveContext,
   node: Node
 ): PropTypeData[] {
   const props: PropTypeData[] = []
@@ -222,7 +228,7 @@ function resolveRuntimePropsFromType(
 }
 
 function genRuntimePropFromType(
-  ctx: ScriptCompileContext,
+  ctx: TypeResolveContext,
   { key, required, type, skipCheck }: PropTypeData,
   hasStaticDefaults: boolean
 ): string {
@@ -284,7 +290,7 @@ function genRuntimePropFromType(
  * static properties, we can directly generate more optimized default
  * declarations. Otherwise we will have to fallback to runtime merging.
  */
-function hasStaticWithDefaults(ctx: ScriptCompileContext) {
+function hasStaticWithDefaults(ctx: TypeResolveContext) {
   return !!(
     ctx.propsRuntimeDefaults &&
     ctx.propsRuntimeDefaults.type === 'ObjectExpression' &&
@@ -297,7 +303,7 @@ function hasStaticWithDefaults(ctx: ScriptCompileContext) {
 }
 
 function genDestructuredDefaultValue(
-  ctx: ScriptCompileContext,
+  ctx: TypeResolveContext,
   key: string,
   inferredType?: string[]
 ):

packages/compiler-sfc/src/script/resolveType.ts

@@ -42,6 +42,13 @@ import type TS from 'typescript'
 import { extname, dirname } from 'path'
 import { minimatch as isMatch } from 'minimatch'
 
+export type SimpleTypeResolveOptions = Partial<
+  Pick<
+    SFCScriptCompileOptions,
+    'globalTypeFiles' | 'fs' | 'babelParserPlugins' | 'isProd'
+  >
+>
+
 /**
  * TypeResolveContext is compatible with ScriptCompileContext
  * but also allows a simpler version of it with minimal required properties
@@ -59,13 +66,28 @@ import { minimatch as isMatch } from 'minimatch'
  */
 export type SimpleTypeResolveContext = Pick<
   ScriptCompileContext,
-  // required
-  'source' | 'filename' | 'error' | 'options'
+  // file
+  | 'source'
+  | 'filename'
+
+  // utils
+  | 'error'
+  | 'helper'
+  | 'getString'
+
+  // props
+  | 'propsTypeDecl'
+  | 'propsRuntimeDefaults'
+  | 'propsDestructuredBindings'
+
+  // emits
+  | 'emitsTypeDecl'
 > &
   Partial<
     Pick<ScriptCompileContext, 'scope' | 'globalScopes' | 'deps' | 'fs'>
   > & {
     ast: Statement[]
+    options: SimpleTypeResolveOptions
   }
 
 export type TypeResolveContext = ScriptCompileContext | SimpleTypeResolveContext