Update vue/no-expose-after-await rule to support <script setup>

.eslintrc.js

@@ -119,6 +119,7 @@ module.exports = {
     'prefer-spread': 'error',
 
     'dot-notation': 'error',
+    'arrow-body-style': 'error',
 
     'unicorn/consistent-function-scoping': [
       'error',

docs/rules/no-expose-after-await.md

@@ -13,14 +13,14 @@ since: v8.1.0
 
 ## :book: Rule Details
 
-This rule reports usages of `expose()` after an `await` expression.  
-In the `setup()` function, `expose()` should be registered synchronously.
+This rule reports usages of `expose()` and `defineExpose()` after an `await` expression.  
+In the `setup()` function, `expose()` should be registered synchronously.  
+In the `<script setup>`, `defineExpose()` should be registered synchronously.
 
 <eslint-code-block :rules="{'vue/no-expose-after-await': ['error']}">
 
 ```vue
 <script>
-import { watch } from 'vue'
 export default {
   async setup(props, { expose }) {
     /* ✓ GOOD */
@@ -37,6 +37,22 @@ export default {
 
 </eslint-code-block>
 
+<eslint-code-block :rules="{'vue/no-expose-after-await': ['error']}">
+
+```vue
+<script setup>
+/* ✓ GOOD */
+defineExpose({/* ... */})
+
+await doSomething()
+
+/* ✗ BAD */
+defineExpose({/* ... */})
+</script>
+```
+
+</eslint-code-block>
+
 ## :wrench: Options
 
 Nothing.

lib/rules/attribute-hyphenation.js

@@ -107,9 +107,7 @@ module.exports = {
      * @param {string} value
      */
     function isIgnoredAttribute(value) {
-      const isIgnored = ignoredAttributes.some((attr) => {
-        return value.includes(attr)
-      })
+      const isIgnored = ignoredAttributes.some((attr) => value.includes(attr))
 
       if (isIgnored) {
         return true

lib/rules/no-dupe-v-else-if.js

@@ -167,11 +167,10 @@ module.exports = {
 
             for (const condition of listToCheck) {
               const operands = (condition.operands = condition.operands.filter(
-                (orOperand) => {
-                  return !currentOrOperands.operands.some((currentOrOperand) =>
+                (orOperand) =>
+                  !currentOrOperands.operands.some((currentOrOperand) =>
                     isSubset(currentOrOperand, orOperand)
                   )
-                }
               ))
               if (operands.length === 0) {
                 context.report({

lib/rules/no-expose-after-await.js

@@ -46,7 +46,7 @@ module.exports = {
     fixable: null,
     schema: [],
     messages: {
-      forbidden: 'The `expose` after `await` expression are forbidden.'
+      forbidden: '`{{name}}` is forbidden after an `await` expression.'
     }
   },
   /** @param {RuleContext} context */
@@ -55,147 +55,192 @@ module.exports = {
      * @typedef {object} SetupScopeData
      * @property {boolean} afterAwait
      * @property {[number,number]} range
-     * @property {Set<Identifier>} exposeReferenceIds
-     * @property {Set<Identifier>} contextReferenceIds
+     * @property {(node: Identifier, callNode: CallExpression) => boolean} isExposeReferenceId
+     * @property {(node: Identifier) => boolean} isContextReferenceId
      */
     /**
      * @typedef {object} ScopeStack
      * @property {ScopeStack | null} upper
-     * @property {FunctionDeclaration | FunctionExpression | ArrowFunctionExpression} scopeNode
+     * @property {FunctionDeclaration | FunctionExpression | ArrowFunctionExpression | Program} scopeNode
      */
-    /** @type {Map<FunctionDeclaration | FunctionExpression | ArrowFunctionExpression, SetupScopeData>} */
+    /** @type {Map<FunctionDeclaration | FunctionExpression | ArrowFunctionExpression | Program, SetupScopeData>} */
     const setupScopes = new Map()
 
     /** @type {ScopeStack | null} */
     let scopeStack = null
 
-    return utils.defineVueVisitor(context, {
-      onSetupFunctionEnter(node) {
-        const contextParam = node.params[1]
-        if (!contextParam) {
-          // no arguments
-          return
-        }
-        if (contextParam.type === 'RestElement') {
-          // cannot check
-          return
-        }
-        if (contextParam.type === 'ArrayPattern') {
-          // cannot check
-          return
+    return utils.compositingVisitors(
+      {
+        /**
+         * @param {Program} node
+         */
+        Program(node) {
+          scopeStack = {
+            upper: scopeStack,
+            scopeNode: node
+          }
         }
-        /** @type {Set<Identifier>} */
-        const contextReferenceIds = new Set()
-        /** @type {Set<Identifier>} */
-        const exposeReferenceIds = new Set()
-        if (contextParam.type === 'ObjectPattern') {
-          const exposeProperty = utils.findAssignmentProperty(
-            contextParam,
-            'expose'
-          )
-          if (!exposeProperty) {
-            return
+      },
+      {
+        /**
+         * @param {FunctionExpression | FunctionDeclaration | ArrowFunctionExpression} node
+         */
+        ':function'(node) {
+          scopeStack = {
+            upper: scopeStack,
+            scopeNode: node
           }
-          const exposeParam = exposeProperty.value
-          // `setup(props, {emit})`
-          const variable =
-            exposeParam.type === 'Identifier'
-              ? findVariable(context.getScope(), exposeParam)
-              : null
-          if (!variable) {
+        },
+        ':function:exit'() {
+          scopeStack = scopeStack && scopeStack.upper
+        },
+        /** @param {AwaitExpression} node */
+        AwaitExpression(node) {
+          if (!scopeStack) {
             return
           }
-          for (const reference of variable.references) {
-            if (!reference.isRead()) {
-              continue
-            }
-            exposeReferenceIds.add(reference.identifier)
+          const setupScope = setupScopes.get(scopeStack.scopeNode)
+          if (!setupScope || !utils.inRange(setupScope.range, node)) {
+            return
           }
-        } else if (contextParam.type === 'Identifier') {
-          // `setup(props, context)`
-          const variable = findVariable(context.getScope(), contextParam)
-          if (!variable) {
+          setupScope.afterAwait = true
+        },
+        /** @param {CallExpression} node */
+        CallExpression(node) {
+          if (!scopeStack) {
             return
           }
-          for (const reference of variable.references) {
-            if (!reference.isRead()) {
-              continue
-            }
-            contextReferenceIds.add(reference.identifier)
+          const setupScope = setupScopes.get(scopeStack.scopeNode)
+          if (
+            !setupScope ||
+            !setupScope.afterAwait ||
+            !utils.inRange(setupScope.range, node)
+          ) {
+            return
           }
-        }
-        setupScopes.set(node, {
-          afterAwait: false,
-          range: node.range,
-          exposeReferenceIds,
-          contextReferenceIds
-        })
-      },
-      /**
-       * @param {FunctionExpression | FunctionDeclaration | ArrowFunctionExpression} node
-       */
-      ':function'(node) {
-        scopeStack = {
-          upper: scopeStack,
-          scopeNode: node
-        }
-      },
-      ':function:exit'() {
-        scopeStack = scopeStack && scopeStack.upper
-      },
-      /** @param {AwaitExpression} node */
-      AwaitExpression(node) {
-        if (!scopeStack) {
-          return
-        }
-        const setupScope = setupScopes.get(scopeStack.scopeNode)
-        if (!setupScope || !utils.inRange(setupScope.range, node)) {
-          return
-        }
-        setupScope.afterAwait = true
-      },
-      /** @param {CallExpression} node */
-      CallExpression(node) {
-        if (!scopeStack) {
-          return
-        }
-        const setupScope = setupScopes.get(scopeStack.scopeNode)
-        if (
-          !setupScope ||
-          !setupScope.afterAwait ||
-          !utils.inRange(setupScope.range, node)
-        ) {
-          return
-        }
-        const { contextReferenceIds, exposeReferenceIds } = setupScope
-        if (
-          node.callee.type === 'Identifier' &&
-          exposeReferenceIds.has(node.callee)
-        ) {
-          // setup(props,{expose}) {expose()}
-          context.report({
-            node,
-            messageId: 'forbidden'
-          })
-        } else {
-          const expose = getCalleeMemberNode(node)
+          const { isContextReferenceId, isExposeReferenceId } = setupScope
           if (
-            expose &&
-            expose.name === 'expose' &&
-            expose.member.object.type === 'Identifier' &&
-            contextReferenceIds.has(expose.member.object)
+            node.callee.type === 'Identifier' &&
+            isExposeReferenceId(node.callee, node)
           ) {
-            // setup(props,context) {context.emit()}
+            // setup(props,{expose}) {expose()}
             context.report({
               node,
-              messageId: 'forbidden'
+              messageId: 'forbidden',
+              data: {
+                name: node.callee.name
+              }
             })
+          } else {
+            const expose = getCalleeMemberNode(node)
+            if (
+              expose &&
+              expose.name === 'expose' &&
+              expose.member.object.type === 'Identifier' &&
+              isContextReferenceId(expose.member.object)
+            ) {
+              // setup(props,context) {context.emit()}
+              context.report({
+                node,
+                messageId: 'forbidden',
+                data: {
+                  name: expose.name
+                }
+              })
+            }
           }
         }
       },
-      onSetupFunctionExit(node) {
-        setupScopes.delete(node)
-      }
-    })
+      (() => {
+        const scriptSetup = utils.getScriptSetupElement(context)
+        if (!scriptSetup) {
+          return {}
+        }
+        return {
+          /**
+           * @param {Program} node
+           */
+          Program(node) {
+            context
+              .getScope()
+              .references.find((ref) => ref.identifier.name === 'defineExpose')
+            setupScopes.set(node, {
+              afterAwait: false,
+              range: scriptSetup.range,
+              isExposeReferenceId: (_id, callNode) =>
+                callNode.parent.type === 'ExpressionStatement' &&
+                callNode.parent.parent === node,
+              isContextReferenceId: () => false
+            })
+          }
+        }
+      })(),
+      utils.defineVueVisitor(context, {
+        onSetupFunctionEnter(node) {
+          const contextParam = node.params[1]
+          if (!contextParam) {
+            // no arguments
+            return
+          }
+          if (contextParam.type === 'RestElement') {
+            // cannot check
+            return
+          }
+          if (contextParam.type === 'ArrayPattern') {
+            // cannot check
+            return
+          }
+          /** @type {Set<Identifier>} */
+          const contextReferenceIds = new Set()
+          /** @type {Set<Identifier>} */
+          const exposeReferenceIds = new Set()
+          if (contextParam.type === 'ObjectPattern') {
+            const exposeProperty = utils.findAssignmentProperty(
+              contextParam,
+              'expose'
+            )
+            if (!exposeProperty) {
+              return
+            }
+            const exposeParam = exposeProperty.value
+            // `setup(props, {emit})`
+            const variable =
+              exposeParam.type === 'Identifier'
+                ? findVariable(context.getScope(), exposeParam)
+                : null
+            if (!variable) {
+              return
+            }
+            for (const reference of variable.references) {
+              if (!reference.isRead()) {
+                continue
+              }
+              exposeReferenceIds.add(reference.identifier)
+            }
+          } else if (contextParam.type === 'Identifier') {
+            // `setup(props, context)`
+            const variable = findVariable(context.getScope(), contextParam)
+            if (!variable) {
+              return
+            }
+            for (const reference of variable.references) {
+              if (!reference.isRead()) {
+                continue
+              }
+              contextReferenceIds.add(reference.identifier)
+            }
+          }
+          setupScopes.set(node, {
+            afterAwait: false,
+            range: node.range,
+            isExposeReferenceId: (id) => exposeReferenceIds.has(id),
+            isContextReferenceId: (id) => contextReferenceIds.has(id)
+          })
+        },
+        onSetupFunctionExit(node) {
+          setupScopes.delete(node)
+        }
+      })
+    )
   }
 }