fix: 🐛 pass less @imports as dependencies to svelte

src/transformers/less.js

@@ -1,13 +1,15 @@
 const less = require('less/lib/less-node')
 
-module.exports = ({ content, filename, options }) => {
-  return less
-    .render(content, {
-      sourceMap: {},
-      ...options,
-    })
-    .then(output => ({
-      code: output.css,
-      map: output.map,
-    }))
+module.exports = async ({ content, filename, options }) => {
+  const { css, map, imports } = await less.render(content, {
+    sourceMap: {},
+    filename,
+    ...options,
+  })
+
+  return {
+    code: css,
+    map,
+    dependencies: imports,
+  }
 }

test/transformers/less.test.js

@@ -0,0 +1,14 @@
+const { resolve } = require('path')
+const getAutoPreprocess = require('../../src')
+const { preprocess } = require('../utils.js')
+
+describe('transformer - less', () => {
+  it('should return @imported files as dependencies', async () => {
+    const template = `<style lang="less">@import "fixtures/style.less";</style>`
+    const opts = getAutoPreprocess()
+    const preprocessed = await preprocess(template, opts)
+    expect(preprocessed.dependencies).toContain(
+      resolve(__dirname, '..', 'fixtures', 'style.less'),
+    )
+  })
+})