Add vue/no-duplicate-attr-inheritance rule (from #627)

docs/rules/README.md

@@ -282,6 +282,7 @@ For example:
 | [vue/match-component-file-name](./match-component-file-name.md) | require component name property to match its file name |  |
 | [vue/max-len](./max-len.md) | enforce a maximum line length |  |
 | [vue/no-boolean-default](./no-boolean-default.md) | disallow boolean defaults | :wrench: |
+| [vue/no-duplicate-attr-inheritance](./no-duplicate-attr-inheritance.md) | enforce `inheritAttrs` to be set to `false` when using `v-bind="$attrs"` |  |
 | [vue/no-empty-pattern](./no-empty-pattern.md) | disallow empty destructuring patterns |  |
 | [vue/no-irregular-whitespace](./no-irregular-whitespace.md) | disallow irregular whitespace |  |
 | [vue/no-reserved-component-names](./no-reserved-component-names.md) | disallow the use of reserved names in component definitions |  |

docs/rules/no-duplicate-attr-inheritance.md

@@ -0,0 +1,56 @@
+---
+pageClass: rule-details
+sidebarDepth: 0
+title: vue/no-duplicate-attr-inheritance
+description: enforce `inheritAttrs` to be set to `false` when using `v-bind="$attrs"`
+---
+# vue/no-duplicate-attr-inheritance
+> enforce `inheritAttrs` to be set to `false` when using `v-bind="$attrs"`
+
+## :book: Rule Details
+
+This rule aims to prevent duplicated attribute inheritance.  
+This rule to warn to apply `inheritAttrs: false` when it detects `v-bind="$attrs"` being used.
+
+<eslint-code-block :rules="{'vue/no-duplicate-attr-inheritance': ['error']}">
+
+```vue
+<template>
+  <MyInput v-bind="$attrs" />
+</template>
+<script>
+export default {
+  /* ✓ GOOD */
+  inheritAttrs: false
+}
+```
+
+</eslint-code-block>
+
+<eslint-code-block :rules="{'vue/no-duplicate-attr-inheritance': ['error']}">
+
+```vue
+<template>
+  <MyInput v-bind="$attrs" />
+</template>
+<script>
+export default {
+  /* ✗ BAD */
+  // inheritAttrs: true (default)
+}
+```
+
+</eslint-code-block>
+
+### Options
+
+Nothing.
+
+## Further Reading
+
+- [API - inheritAttrs](https://vuejs.org/v2/api/index.html#inheritAttrs)
+
+## :mag: Implementation
+
+- [Rule source](https://github.com/vuejs/eslint-plugin-vue/blob/master/lib/rules/no-duplicate-attr-inheritance.js)
+- [Test source](https://github.com/vuejs/eslint-plugin-vue/blob/master/tests/lib/rules/no-duplicate-attr-inheritance.js)

lib/index.js

@@ -58,6 +58,7 @@ module.exports = {
     'no-deprecated-v-on-number-modifiers': require('./rules/no-deprecated-v-on-number-modifiers'),
     'no-deprecated-vue-config-keycodes': require('./rules/no-deprecated-vue-config-keycodes'),
     'no-dupe-keys': require('./rules/no-dupe-keys'),
+    'no-duplicate-attr-inheritance': require('./rules/no-duplicate-attr-inheritance'),
     'no-duplicate-attributes': require('./rules/no-duplicate-attributes'),
     'no-empty-pattern': require('./rules/no-empty-pattern'),
     'no-irregular-whitespace': require('./rules/no-irregular-whitespace'),

lib/rules/no-duplicate-attr-inheritance.js

@@ -0,0 +1,62 @@
+/**
+ * @fileoverview Disable inheritAttrs when using v-bind="$attrs"
+ * @author Hiroki Osame
+ */
+'use strict'
+
+const utils = require('../utils')
+
+// ------------------------------------------------------------------------------
+// Rule Definition
+// ------------------------------------------------------------------------------
+
+module.exports = {
+  meta: {
+    type: 'suggestion',
+    docs: {
+      description: 'enforce `inheritAttrs` to be set to `false` when using `v-bind="$attrs"`',
+      categories: undefined,
+      recommended: false,
+      url: 'https://eslint.vuejs.org/rules/no-duplicate-attr-inheritance.html'
+    },
+    fixable: null,
+    schema: [
+      // fill in your schema
+    ]
+  },
+
+  create (context) {
+    let inheritsAttrs = true
+
+    return Object.assign(
+      utils.executeOnVue(context, (node) => {
+        const inheritAttrsProp = node.properties.find(prop => (prop.type === 'Property' && utils.getStaticPropertyName(prop) === 'inheritAttrs'))
+
+        if (inheritAttrsProp && inheritAttrsProp.value.type === 'Literal') {
+          inheritsAttrs = inheritAttrsProp.value.value
+        }
+      }),
+      utils.defineTemplateBodyVisitor(context, {
+        "VAttribute[directive=true][key.name.name='bind'][key.argument=null] > VExpressionContainer" (node) {
+          if (!inheritsAttrs) {
+            return
+          }
+          const attrsRef = node.references.find(reference => {
+            if (reference.variable != null) {
+              // Not vm reference
+              return false
+            }
+            return reference.id.name === '$attrs'
+          })
+
+          if (attrsRef) {
+            context.report({
+              node: attrsRef.id,
+              message: 'Set "inheritAttrs" to false.'
+            })
+          }
+        }
+      })
+    )
+  }
+}

tests/lib/rules/no-duplicate-attr-inheritance.js

@@ -0,0 +1,113 @@
+/**
+ * @fileoverview Disable inheritAttrs when using v-bind="$attrs"
+ * @author Hiroki Osame
+ */
+'use strict'
+
+// ------------------------------------------------------------------------------
+// Requirements
+// ------------------------------------------------------------------------------
+
+var rule = require('../../../lib/rules/no-duplicate-attr-inheritance')
+
+var RuleTester = require('eslint').RuleTester
+
+// ------------------------------------------------------------------------------
+// Tests
+// ------------------------------------------------------------------------------
+
+var ruleTester = new RuleTester({
+  parser: require.resolve('vue-eslint-parser'),
+  parserOptions: {
+    ecmaVersion: 2018,
+    sourceType: 'module'
+  }
+})
+ruleTester.run('no-duplicate-attr-inheritance', rule, {
+
+  valid: [
+    {
+      filename: 'test.vue',
+      code: '<template><div><div></div></div></template>'
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        <template><div><div></div></div></template>
+        <script>
+        export default { inheritAttrs: true }
+        </script>
+      `
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        <template><div><div></div></div></template>
+        <script>
+        const data = {};
+        export default {
+          ...data,
+          inheritAttrs: true
+        }
+        </script>
+      `
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        <template><div><div></div></div></template>
+        <script>
+        const inheritAttrs = false;
+        export default { inheritAttrs }
+        </script>
+      `
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        <template><div><div v-bind="$attrs"></div></div></template>
+        <script>
+        export default { inheritAttrs: false }
+        </script>
+      `
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        <template><div><div v-bind="$attrs"></div></div></template>
+        <script>
+        export default { inheritAttrs: 0 }
+        </script>
+      `
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        <template><div><div v-bind:foo="$attrs"></div></div></template>
+        <script>
+        export default {  }
+        </script>
+      `
+    }
+  ],
+
+  invalid: [
+    {
+      filename: 'test.vue',
+      code: '<template><div><div v-bind="$attrs"></div></div></template>',
+      errors: ['Set "inheritAttrs" to false.']
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        <template><div><div v-bind="$attrs"></div></div></template>
+        <script>
+        export default {
+          inheritAttrs: true
+        }
+        </script>
+      `,
+      errors: ['Set "inheritAttrs" to false.']
+    }
+  ]
+})