Initial commit

.editorconfig

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+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 2
+indent_style = space
+insert_final_newline = true
+max_line_length = 100
+trim_trailing_whitespace = true
+
+[COMMIT_EDITMSG]
+max_line_length = 72

.eslintrc.yaml

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+root: true
+extends:
+  - remcohaszing
+rules:
+  no-use-before-define: off

.github/workflows/ci.yaml

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+name: ci
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+    tags: ['*']
+
+jobs:
+  eslint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 20
+      - run: npm ci
+      - run: npx eslint .
+
+  pack:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 20
+      - run: npm ci
+      - run: npm pack
+      - uses: actions/upload-artifact@v3
+        with:
+          name: package
+          path: '*.tgz'
+
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version:
+          - 16
+          - 18
+          - 20
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm install --global npm@latest
+      - run: npm ci
+      - run: npm test
+      - uses: codecov/codecov-action@v3
+        if: ${{ matrix.node-version == 20 }}
+
+  prettier:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 20
+      - run: npm ci
+      - run: npx prettier --check .
+
+  remark:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 20
+      - run: npm ci
+      - run: npx remark --frail .
+
+  tsc:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 20
+      - run: npm ci
+      - run: npx tsc
+
+  release:
+    runs-on: ubuntu-latest
+    needs:
+      - eslint
+      - test
+      - pack
+      - prettier
+      - remark
+      - tsc
+    if: startsWith(github.ref, 'refs/tags/')
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 20
+          registry-url: https://registry.npmjs.org
+      - uses: actions/download-artifact@v3
+        with: { name: package }
+      - run: npm publish *.tgz --provenance
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

.gitignore

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+coverage/
+dist/
+node_modules/
+*.d.ts
+*.log
+*.map
+*.tgz
+*.tsbuildinfo

.prettierrc.yaml

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+proseWrap: always
+semi: false
+singleQuote: true
+trailingComma: none

.remarkrc.yaml

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+plugins:
+  - remark-preset-remcohaszing

LICENSE.md

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+# MIT License
+
+Copyright © 2023 Remco Haszing
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+associated documentation files (the “Software”), to deal in the Software without restriction,
+including without limitation the rights to use, copy, modify, merge, publish, distribute,
+sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial
+portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
+NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
+OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# recma-mdx-is-mdx-component
+
+[![github actions](https://github.com/remcohaszing/recma-mdx-is-mdx-component/actions/workflows/ci.yaml/badge.svg)](https://github.com/remcohaszing/recma-mdx-is-mdx-component/actions/workflows/ci.yaml)
+[![npm version](https://img.shields.io/npm/v/recma-mdx-is-mdx-component)](https://www.npmjs.com/package/recma-mdx-is-mdx-component)
+[![npm downloads](https://img.shields.io/npm/dm/recma-mdx-is-mdx-component)](https://www.npmjs.com/package/recma-mdx-is-mdx-component)
+[![codecov](https://codecov.io/gh/remcohaszing/recma-mdx-is-mdx-component/branch/main/graph/badge.svg)](https://codecov.io/gh/remcohaszing/recma-mdx-is-mdx-component)
+
+A recma plugin to define the `isMdxComponent` property on MDX components.
+
+## Table of Contents
+
+- [Installation](#installation)
+- [Usage](#usage)
+- [API](#api)
+- [Compatibility](#compatibility)
+- [License](#license)
+
+## Installation
+
+```sh
+npm install recma-mdx-is-mdx-component
+```
+
+## Usage
+
+This recma plugin assigns `true` to the property `MDXContent.isMdxComponent`.
+
+For example, given a file named `example.mdx` with the following contents:
+
+```mdx
+Some MDX content
+```
+
+The following script:
+
+```js
+import { readFile } from 'node:fs/promises'
+
+import { compile } from '@mdx-js/mdx'
+import recmaPluginInjectIsMdxComponent from 'recma-mdx-is-mdx-component'
+
+const { contents } = await compile(await readFile('example.mdx'), {
+  jsx: true,
+  recmaPlugins: [recmaPluginInjectIsMdxComponent]
+})
+console.log(contents)
+```
+
+Roughly yields:
+
+```jsx
+MDXContent.isMdxComponent = true
+export default function MDXContent() {
+  return <p>Some MDX content</p>
+}
+```
+
+## API
+
+The default export is a recma plugin. It takes no options.
+
+## Compatibility
+
+This project is compatible with Node.js 16 or greater.
+
+## License
+
+[MIT](LICENSE.md) © [Remco Haszing](https://github.com/remcohaszing)

index.js

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+/**
+ * Inserty a conditional assignment of `MDXContent.isMdxComponent = true` in the AST.
+ *
+ * @param {import('estree').Program} ast
+ *   The AST to transform.
+ * @returns {undefined}
+ */
+function transformer(ast) {
+  // This needs to be defined before the return statement if the user uses evaluate()
+  ast.body.unshift({
+    type: 'ExpressionStatement',
+    expression: {
+      type: 'AssignmentExpression',
+      operator: '=',
+      left: {
+        type: 'MemberExpression',
+        object: { type: 'Identifier', name: 'MDXContent' },
+        property: { type: 'Identifier', name: 'isMdxComponent' },
+        computed: false,
+        optional: false
+      },
+      right: { type: 'Literal', value: true }
+    }
+  })
+}
+
+/**
+ * @type {import('unified').Plugin<[], import('estree').Program>}
+ *
+ * A recma plugin to define the `isMdxComponent` property on MDX components.
+ */
+export const recmaPluginInjectIsMdxComponent = () => transformer