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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| import fs from 'node:fs/promises'; | ||
| import { setVfileFrontmatter } from '@astrojs/markdown-remark'; | ||
| import type { AstroConfig, SSRError } from 'astro'; | ||
| import { VFile } from 'vfile'; | ||
| import type { Plugin } from 'vite'; | ||
| import type { MdxOptions } from './index.js'; | ||
| import { createMdxProcessor } from './plugins.js'; | ||
| import { getFileInfo, parseFrontmatter } from './utils.js'; | ||
|
|
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| export function vitePluginMdx(astroConfig: AstroConfig, mdxOptions: MdxOptions): Plugin { | ||
| let processor: ReturnType<typeof createMdxProcessor> | undefined; | ||
|
|
||
| return { | ||
| name: '@mdx-js/rollup', | ||
| enforce: 'pre', | ||
| buildEnd() { | ||
| processor = undefined; | ||
| }, | ||
| configResolved(resolved) { | ||
| processor = createMdxProcessor(mdxOptions, { | ||
| sourcemap: !!resolved.build.sourcemap, | ||
| }); | ||
|
|
||
| // HACK: move ourselves before Astro's JSX plugin to transform things in the right order | ||
| const jsxPluginIndex = resolved.plugins.findIndex((p) => p.name === 'astro:jsx'); | ||
| if (jsxPluginIndex !== -1) { | ||
| const myPluginIndex = resolved.plugins.findIndex((p) => p.name === '@mdx-js/rollup'); | ||
| if (myPluginIndex !== -1) { | ||
| const myPlugin = resolved.plugins[myPluginIndex]; | ||
| // @ts-ignore-error ignore readonly annotation | ||
| resolved.plugins.splice(myPluginIndex, 1); | ||
| // @ts-ignore-error ignore readonly annotation | ||
| resolved.plugins.splice(jsxPluginIndex, 0, myPlugin); | ||
| } | ||
| } | ||
| }, | ||
| async resolveId(source, importer, options) { | ||
| if (importer?.endsWith('.mdx') && source[0] !== '/') { | ||
| let resolved = await this.resolve(source, importer, options); | ||
| if (!resolved) resolved = await this.resolve('./' + source, importer, options); | ||
| return resolved; | ||
| } | ||
| }, | ||
| // Override transform to alter code before MDX compilation | ||
| // ex. inject layouts | ||
| async transform(_, id) { | ||
| if (!id.endsWith('.mdx')) return; | ||
|
|
||
| // Read code from file manually to prevent Vite from parsing `import.meta.env` expressions | ||
| const { fileId } = getFileInfo(id, astroConfig); | ||
| const code = await fs.readFile(fileId, 'utf-8'); | ||
|
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| const { data: frontmatter, content: pageContent } = parseFrontmatter(code, id); | ||
|
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| const vfile = new VFile({ value: pageContent, path: id }); | ||
| // Ensure `data.astro` is available to all remark plugins | ||
| setVfileFrontmatter(vfile, frontmatter); | ||
|
|
||
| // `processor` is initialized in `configResolved`, and removed in `buildEnd`. `transform` | ||
| // should be called in between those two lifecycle, so this error should never happen | ||
| if (!processor) { | ||
| return this.error( | ||
| 'MDX processor is not initialized. This is an internal error. Please file an issue.' | ||
| ); | ||
| } | ||
|
|
||
| try { | ||
| const compiled = await processor.process(vfile); | ||
|
|
||
| return { | ||
| code: String(compiled.value), | ||
| map: compiled.map, | ||
| }; | ||
| } catch (e: any) { | ||
| const err: SSRError = e; | ||
|
|
||
| // For some reason MDX puts the error location in the error's name, not very useful for us. | ||
| err.name = 'MDXError'; | ||
| err.loc = { file: fileId, line: e.line, column: e.column }; | ||
|
|
||
| // For another some reason, MDX doesn't include a stack trace. Weird | ||
| Error.captureStackTrace(err); | ||
|
|
||
| throw err; | ||
| } | ||
| }, | ||
| }; | ||
| } |