To access an environment variable in npm scripts you would do something like this in your package.json:
要在npm脚本中访问环境变量，您可以在package.json中执行以下操作：
"scripts": {
"preinstall": "echo ${npm_package_name}"
}
The problem is that works only in Unix, not Windows, where you have to use %npm_package_name%.
问题是只能在Unix中使用，而不能在Windows中使用％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.
有没有办法让这个OS独立？如果npm在调用命令之前可以进行这样的变量扩展，那将是很好的。
2 个解决方案
#1
23
To make it cross-platform, use cross-var:
要使其跨平台，请使用cross-var：
"scripts": {
"preinstall": "cross-var echo ${npm_package_name}"
}
#2
2
There's no known way to do this that's OS independent.
没有已知的方法来执行此操作系统独立操作。
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 preinstall command 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.js file:
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);
#1
23
To make it cross-platform, use cross-var:
要使其跨平台，请使用cross-var：
"scripts": {
"preinstall": "cross-var echo ${npm_package_name}"
}
#2
2
There's no known way to do this that's OS independent.
没有已知的方法来执行此操作系统独立操作。
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 preinstall command 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.js file:
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);