rsnext/packages/eslint-plugin-next/lib/rules/link-passhref.js

const NodeAttributes = require('../utils/node-attributes.js')

module.exports = {
  meta: {
    docs: {
      description:
        'Ensure passHref is assigned if child of Link component is a custom component',
      category: 'HTML',
      recommended: true,
      url: 'https://nextjs.org/docs/messages/link-passhref',
    },
    fixable: null,
  },

  create: function (context) {
    let linkImport = null

    return {
      ImportDeclaration(node) {
        if (node.source.value === 'next/link') {
          linkImport = node.specifiers[0].local.name
        }
      },

      JSXOpeningElement(node) {
        if (node.name.name !== 'Link' || node.name.name !== linkImport) {
          return
        }

        const attributes = new NodeAttributes(node)
        const children = node.parent.children

        if (
          !attributes.hasAny() ||
          !attributes.has('href') ||
          !children.some((attr) => attr.type === 'JSXElement')
        ) {
          return
        }

        const hasPassHref =
          attributes.has('passHref') &&
          (typeof attributes.value('passHref') === 'undefined' ||
            attributes.value('passHref') === true)

        const hasAnchorChild = children.some(
          (attr) =>
            attr.type === 'JSXElement' && attr.openingElement.name.name === 'a'
        )

        if (!hasAnchorChild && !hasPassHref) {
          context.report({
            node,
            message: `passHref ${
              attributes.value('passHref') !== true
                ? 'must be set to true'
                : 'is missing'
            }. See https://nextjs.org/docs/messages/link-passhref`,
          })
        }
      },
    }
  },
}