43 lines
1.4 KiB
JavaScript
43 lines
1.4 KiB
JavaScript
const childProcess = require('child_process');
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function getExecutable(command) {
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// Windows 全局安装的命令通常是 .cmd 文件，其他系统直接使用命令名。
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return process.platform === 'win32' ? `${command}.cmd` : command;
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}
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function commandExists(command) {
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// 使用系统自带的命令查找能力，避免为了检测 Yarn 引入额外依赖。
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const lookupCommand = process.platform === 'win32' ? 'where.exe' : 'which';
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const result = childProcess.spawnSync(lookupCommand, [getExecutable(command)], {
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stdio: 'ignore',
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});
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return result.status === 0;
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}
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function ensureYarnAvailable(isCommandAvailable = commandExists) {
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// 参数可注入是为了让测试覆盖 Yarn 存在和不存在两种情况。
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if (!isCommandAvailable('yarn')) {
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throw new Error('未检测到 Yarn，请先安装 Yarn');
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}
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}
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function runYarn(args, cwd) {
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ensureYarnAvailable();
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const executable = getExecutable('yarn');
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console.log(`执行: yarn ${args.join(' ')}`);
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if (process.platform === 'win32') {
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// Node.js 不能始终直接执行 yarn.cmd，因此交给 cmd.exe 解析，避免 spawnSync yarn ENOENT。
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childProcess.execFileSync(process.env.ComSpec || 'cmd.exe', [
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'/d',
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'/s',
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'/c',
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executable,
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...args,
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], { cwd, stdio: 'inherit' });
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return;
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}
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childProcess.execFileSync(executable, args, { cwd, stdio: 'inherit' });
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}
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module.exports = { commandExists, ensureYarnAvailable, runYarn };
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