rehype-minify-url: add support for file.data.meta

packages/rehype-minify-url/index.js

@@ -40,16 +40,27 @@ const own = {}.hasOwnProperty
  */
 export default function rehypeMinifyUrl(options) {
   const {from, ...rest} = options || {}
-  // @ts-expect-error: checked next.
-  const relate = new Relate(from, rest)
 
-  try {
-    relate.relate('/')
-  } catch {
-    throw new Error('Missing absolute `from` in options')
-  }
+  return (tree, file) => {
+    const meta = /** @type {Record<string, unknown>} */ (file.data.meta || {})
+
+    /** @type {string|undefined} */
+    const href =
+      from ||
+      (meta.origin && meta.pathname
+        ? // @ts-expect-error: `URL` exists.
+          new URL(meta.pathname, meta.origin).href
+        : undefined)
+
+    // @ts-expect-error: checked next.
+    const relate = new Relate(href, rest)
+
+    try {
+      relate.relate('/')
+    } catch {
+      throw new Error('Missing absolute `from` in options')
+    }
 
-  return (tree) => {
     visit(tree, 'element', (node) => {
       const props = node.properties || {}
       /** @type {string} */

packages/rehype-minify-url/test.js

@@ -1,3 +1,4 @@
+import {URL} from 'node:url'
 import test from 'tape'
 import {rehype} from 'rehype'
 import {u} from 'unist-builder'
@@ -6,15 +7,11 @@ import min from './index.js'
 
 test('rehype-minify-url', (t) => {
   t.throws(() => {
-    rehype().use(min).freeze()
+    rehype().use(min).processSync('')
   }, /^Error: Missing absolute `from` in options$/)
 
   t.throws(() => {
-    rehype().use(min, {from: '/'}).freeze()
-  }, /^Error: Missing absolute `from` in options$/)
-
-  t.throws(() => {
-    rehype().use(min, {from: '/'}).freeze()
+    rehype().use(min, {from: '/'}).processSync('')
   }, /^Error: Missing absolute `from` in options$/)
 
   const options = {from: 'http://example.com/one/alpha/'}
@@ -90,5 +87,19 @@ test('rehype-minify-url', (t) => {
     u('root', [{type: 'element', tagName: 'a', children: []}])
   )
 
+  t.deepEqual(
+    rehype()
+      .use(() => (_, file) => {
+        const url = new URL(options.from)
+        file.data.meta = {origin: url.origin, pathname: url.pathname}
+      })
+      .use(min)
+      .runSync(
+        u('root', [h('a', {href: 'http://example.com/one/bravo/index.html'})])
+      ),
+    u('root', [h('a', {href: '../bravo/'})]),
+    'should support `data.meta.{origin,pathname}`'
+  )
+
   t.end()
 })