node.js 在 node package.json 中，从另一个带有额外参数的脚本中调用脚本，在这种情况下添加 mocha watcher
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In node package.json, invoke script from another script with extra parameter, in this case add mocha watcher
提问by Dinis Cruz
in node's package.json I would like to reuse a command that I already have in a 'script'.
在节点的 package.json 中，我想重用“脚本”中已有的命令。
Here is the practical example
这是实际例子
instead of (note the extra -won the watchscript):
而不是（注意观察脚本上的额外-w）：
"scripts": {
"test" : "./node_modules/mocha/bin/mocha --compilers coffee:coffee-script/register --recursive -R list",
"watch": "./node_modules/mocha/bin/mocha --compilers coffee:coffee-script/register --recursive -R list -w",
}
I would like to have something like
我想要类似的东西
"scripts": {
"test" : "./node_modules/mocha/bin/mocha --compilers coffee:coffee-script/register --recursive -R list",
"watch": "npm run script test" + "-w",
}
which doesn't work (can't do string concats in json), but you should get what I would like
这不起作用（不能在 json 中进行字符串连接），但你应该得到我想要的
I know that npm scripts support: - & (parallel execution) - && (sequencial execution)
我知道 npm 脚本支持：-&（并行执行）-&&（顺序执行）
so maybe there is another option?
所以也许还有另一种选择？
回答by Sam Mikes
This can be done in [email protected]. You don't specify your OS and the version of npmthat you are using, but unless you have done something to update it, you are probably running [email protected]which does notsupport the syntax below.
这可以在[email protected]. 您没有指定您的操作系统和版本npm所使用，但除非你已经做了更新它，你可能运行[email protected]它并不能支持下面的语法。
On Linux or OSX you can update npm with sudo npm install -g npm@latest. See https://github.com/npm/npm/wiki/Troubleshooting#try-the-latest-stable-version-of-npmfor a guide to updating npmon all platforms.
在 Linux 或 OSX 上，您可以使用sudo npm install -g npm@latest. 有关在所有平台上更新的指南，请参阅https://github.com/npm/npm/wiki/Troubleshooting#try-the-latest-stable-version-of-npmnpm。
You should be able to do this by passing an additional argument to your script:
您应该能够通过向脚本传递一个额外的参数来做到这一点：
"scripts": {
"test": "mocha --compilers coffee:coffee-script/register --recursive -R list",
"watch": "npm run test -- -w"
}
I verified this using the following, simplified package.json:
我使用以下简化的 package.json 验证了这一点：
{
"scripts": { "a": "ls", "b": "npm run a -- -l" }
}
Output:
输出：
$ npm run a
> @ a /Users/smikes/src/github/foo
> ls
package.json
$ npm run b
> @ b /Users/smikes/src/github/foo
> npm run a -- -l
> @ a /Users/smikes/src/github/foo
> ls -l
total 8
-rw-r--r-- 1 smikes staff 55 4 Jan 05:34 package.json
$
