node.js 操作系统独立访问 package.json 中的变量
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OS independent access to variables in package.json
提问by Adrian Ber
To access a variable in npm scripts you would do something like this in your package.json:
要访问 npm 脚本中的变量，您可以在您的package.json：
"scripts": {
"preinstall": "echo ${npm_package_name}"
}
The problem is that works only in Unix, not Windows, where you have to use %npm_package_name%.
问题是它只适用于 Unix，而不适用于 Windows，在那里你必须使用%npm_package_name%.
Is there a way to do this OS independent? It will be good if npm could do such a variable expansion, before invoking the command.
有没有办法独立于这个操作系统？如果 npm 可以在调用命令之前进行这样的变量扩展，那就太好了。
回答by Mark Woon
回答by gnerkus
There's no known way to do this that's OS independent.
没有已知的方法可以做到这一点与操作系统无关。
A good workaround is to execute the command within a node script:
一个好的解决方法是在节点脚本中执行命令：
First, change the preinstallcommand to execute a node script:
首先，更改preinstall命令以执行节点脚本：
"scripts": {
"preinstall": "node nameEcho.js"
}
Then you define the command in the nameEcho.jsfile:
然后在nameEcho.js文件中定义命令：
// require the package.json file
var pjson = require('./package.json');
// echo the package's name
console.log(pjson.name);
