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# Step 19 — Phase 6.2: 工具脚本
**依赖**: Step 18
**参考设计**: §15, §17
## 目标
实现 PMD JAR 下载脚本和生产打包脚本。
## 文件变更
| # | 文件 | 操作 | 说明 |
|---|------|------|------|
| 1 | `scripts/download-pmd.mjs` | 新建 | 下载 PMD 7.26.0 JAR 依赖 |
| 2 | `scripts/package-prod.mjs` | 新建 | 生产打包脚本 |
| 3 | `package.json` | 修改 | 添加 download-pmd / package-prod 脚本 |
## 前置准备
```bash
npm install --save-dev @vscode/vsce@^3.9.2
```
---
## 1. `scripts/download-pmd.mjs`
```javascript
import { execSync } from 'child_process';
import { existsSync, mkdirSync, createWriteStream } from 'fs';
import { resolve, dirname } from 'path';
import { fileURLToPath } from 'url';
import { get } from 'https';
import { unlinkSync, readdirSync } from 'fs';
const __dirname = dirname(fileURLToPath(import.meta.url));
const rootDir = resolve(__dirname, '..');
const libDir = resolve(rootDir, 'jars', 'pmd', 'lib');
const PMD_VERSION = '7.26.0';
const PMD_JARS = [
`pmd-core-${PMD_VERSION}.jar`,
`pmd-java-${PMD_VERSION}.jar`,
`pmd-javascript-${PMD_VERSION}.jar`,
`pmd-jsp-${PMD_VERSION}.jar`,
];
const MAVEN_BASE = `https://repo1.maven.org/maven2/net/sourceforge/pmd`;
function downloadFile(url, dest) {
return new Promise((resolve, reject) => {
const file = createWriteStream(dest);
get(url, (response) => {
if (response.statusCode === 302 || response.statusCode === 301) {
downloadFile(response.headers.location, dest).then(resolve).catch(reject);
return;
}
response.pipe(file);
file.on('finish', () => { file.close(); resolve(); });
file.on('error', (err) => { unlinkSync(dest); reject(err); });
}).on('error', (err) => { unlinkSync(dest); reject(err); });
});
}
if (!existsSync(libDir)) {
mkdirSync(libDir, { recursive: true });
}
for (const jar of PMD_JARS) {
const moduleName = jar.replace(`-${PMD_VERSION}.jar`, '').replace('pmd-', '');
const url = `${MAVEN_BASE}/pmd-${moduleName}/${PMD_VERSION}/${jar}`;
const dest = resolve(libDir, jar);
if (existsSync(dest)) {
console.log(`Skip: ${jar} (exists)`);
continue;
}
console.log(`Downloading: ${url}`);
await downloadFile(url, dest);
console.log(`Done: ${jar}`);
}
console.log('PMD JARs download complete.');
```
---
## 2. `scripts/package-prod.mjs`
```javascript
import { execSync } from 'child_process';
import { resolve, dirname } from 'path';
import { fileURLToPath } from 'url';
const __dirname = dirname(fileURLToPath(import.meta.url));
const rootDir = resolve(__dirname, '..');
execSync('node scripts/build.mjs', { cwd: rootDir, stdio: 'inherit' });
execSync('npx vsce package', { cwd: rootDir, stdio: 'inherit' });
console.log('Production package complete.');
```
---
## 3. `package.json` 脚本更新
```json
{
"scripts": {
"download-pmd": "node scripts/download-pmd.mjs",
"package-prod": "node scripts/package-prod.mjs"
}
}
```
---
## 验收
- [ ] `npm run download-pmd` 成功下载 PMD JAR 到 `jars/pmd/lib/`
- [ ] `npm run package-prod` 成功生成 `.vsix` 文件
- [ ] `.vsix` 可安装到 VSCode