Refactor: introduce transformImport to replace swc-plugin-import

[JSerFeng]

Summary

Introduce rspackExperiments.transformImport, it has the same capability as rspackExperiments.import, but with more easy-to-use API.

See output here, only the first item has specifier, the rest items are just render as normal import '{{source}}'

import { specifier } from "{{output[0]}}"
import "{{output[1]}}"

Example:

export default {
  module: {
    rules: [
      {
        test: /\.js$/,
        loader: 'builtin:swc-loader',
        options: {
          rspackExperiments: {
            transformImport: [
              {
                source: 'lib',
                namedImport: false,
                output: [
                  'lib/{{ kebabCase filename }}',
                  'lib/{{ kebabCase filename }}/style.css',
                ],
              },
            ],
          },
        },
      },
    ],
  },
};

import { MyButton, MyInput } from 'lib';

// 👇

import MyButton from 'lib/my-button';
import 'lib/my-button/style.css';
import MyInput from 'lib/my-input';
import 'lib/my-input/style.css';

Related links

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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[github-actions]

📦 Binary Size-limit

Comparing 644d9cc to feat: rspack_cacheable context expose project root (#12685) by jinrui

🎉 Size decreased by 318.00KB from 47.87MB to 47.56MB (⬇️0.65%)

[github-actions]

Rsdoctor Bundle Diff Analysis

Found 5 projects in monorepo, 3 projects with changes.

📊 Quick Summary

Project	Total Size	Change
react-10k	5.7 MB	-8.0 B (-0.0%)
react-1k	825.4 KB	0
react-5k	2.7 MB	+1.0 B (0.0%)
rome	986.0 KB	+1.7 KB (0.2%)
ui-components	2.1 MB	0

📋 Detailed Reports (Click to expand)

📁 react-10k

Path: ../build-tools-performance/cases/react-10k/dist/rsdoctor-data.json

📌 Baseline Commit: 0d1d58f8b8 | PR: #12688

Metric	Current	Baseline	Change
📊 Total Size	5.7 MB	5.7 MB	-8.0 B (-0.0%)
📄 JavaScript	5.7 MB	5.7 MB	-8.0 B (-0.0%)
🎨 CSS	21.0 B	21.0 B	0
🌐 HTML	0 B	0 B	0
📁 Other Assets	0 B	0 B	0

📦 Download Diff Report: react-10k Bundle Diff

📁 react-5k

Path: ../build-tools-performance/cases/react-5k/dist/rsdoctor-data.json

📌 Baseline Commit: 0d1d58f8b8 | PR: #12688

Metric	Current	Baseline	Change
📊 Total Size	2.7 MB	2.7 MB	+1.0 B (0.0%)
📄 JavaScript	2.7 MB	2.7 MB	+1.0 B (0.0%)
🎨 CSS	21.0 B	21.0 B	0
🌐 HTML	0 B	0 B	0
📁 Other Assets	0 B	0 B	0

📦 Download Diff Report: react-5k Bundle Diff

📁 rome

Path: ../build-tools-performance/cases/rome/dist/rsdoctor-data.json

📌 Baseline Commit: 0d1d58f8b8 | PR: #12688

Metric	Current	Baseline	Change
📊 Total Size	986.0 KB	984.3 KB	+1.7 KB (0.2%)
📄 JavaScript	986.0 KB	984.3 KB	+1.7 KB (0.2%)
🎨 CSS	0 B	0 B	0
🌐 HTML	0 B	0 B	0
📁 Other Assets	0 B	0 B	0

📦 Download Diff Report: rome Bundle Diff

Generated by Rsdoctor GitHub Action

[codspeed-hq]

Merging this PR will not alter performance

Summary

✅ 16 untouched benchmarks
⏩ 1 skipped benchmark¹

---

_{Comparing refacotr/swc-plugin-import (644d9cc) with v2 (45d4892)}

Footnotes

1. 1 benchmark was skipped, so the baseline result was used instead. If it was deleted from the codebase, click here and archive it to remove it from the performance reports. ↩

[JSerFeng]

@chenjiahan @ityuany what do you think ?