yarn 控制台脚本中是否有类似的 npm 变量（`npm_config_`）？

Question

您可以在自定义 npm 命令中使用变量（示例来自 https://www.twilio.com/blog/npm-scripts）：

{
  "scripts": {
    "demo": "echo \"Hello $npm_config_first $npm_config_last\""
  }
}

用纱线可以吗？

Answer 1

yarn中没有内置的解决方案，但我找到了一种方法：

{
  "scripts": {
    "demo0": "echo \"Hello\"",
    "demo": "node -e \"const args = process.argv.slice(1).reduce((acc, arg) => { const [key, value] = arg.split('='); acc[key] = value; return acc; }, {}); console.log('Hello', args.first, args.last);\""
  }
}

用途：

$ yarn demo0 Kevin Ross // everything after command will be considered as one argument
// interpreted as `echo "Hello" Kevin Ross`
Hello Kevin Ross // <<< output

正确做法：

$ yarn demo first=Kevin last=Ross
Hello Kevin Ross // <<< output