问题
I am trying to use parallelshell with my node project on Windows to run two processes at the same time.
Here is the scripts section of my package.json file:
"scripts": {
"start": "npm run watch:all",
"test": "echo \"Error: no test specified\" && exit 1",
"lite": "lite-server",
"scss": "node-sass -o css/ css/",
"watch:scss": "onchange \"css/*.scss\" -- npm run scss",
"watch:all": "parallelshell \"npm run watch:scss\" \"npm run lite\""
}
When I run the command npm start I get this error log:
TypeError [ERR_INVALID_ARG_TYPE]: The "options.cwd" property must be of type string. Received type function
at normalizeSpawnArguments (child_process.js:420:11)
at spawn (child_process.js:522:38)
at C:\Users\Daniel\Documents\development\online_classes\coursera_uhk_web_dev\Bootstrap4\conFusion\node_modules\parallelshell\index.js:104:17
at Array.forEach (<anonymous>)
at Object.<anonymous> (C:\Users\Daniel\Documents\development\online_classes\coursera_uhk_web_dev\Bootstrap4\conFusion\node_modules\parallelshell\index.js:100:6)
at Module._compile (internal/modules/cjs/loader.js:702:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:713:10)
at Module.load (internal/modules/cjs/loader.js:612:32)
at tryModuleLoad (internal/modules/cjs/loader.js:551:12)
at Function.Module._load (internal/modules/cjs/loader.js:543:3)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! confusion@1.0.0 watch:all: `parallelshell "npm run watch:scss" "npm run lite"`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the confusion@1.0.0 watch:all script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
Is there something wrong with my syntax? I can run the commands npm run watch:scss and npm run lite individually and they work fine, but I am not able to run the parallelshell command.
Thank you!
回答1:
Try downgrading the parallelshell version from 3.0.2 to 3.0.1
According to the statement, it is just a temporary fix.
https://github.com/darkguy2008/parallelshell/issues/57
Below is the command line syntax to for downgrading parallelshell:
sudo npm uninstall --save-dev parallelshell@3.0.2
sudo npm install --save-dev parallelshell@3.0.1
It worked for me.
Hope this helps and let us know.
回答2:
change a line in your node_modules/parallelshell/index.js:105 file
from: cwd: process.versions.node < '8.0.0' ? process.cwd : process.cwd(),
to: cwd: parseInt(process.versions.node) < 8 ? process.cwd : process.cwd(),
reference: Problem running parallelshell Nodejs script
回答3:
It looks correct to me, instead of escaping your double quotes you could use single quotes inside the double quotes.
Not sure if it will make a difference.
"watch:all": "parallelshell 'npm run watch:scss' 'npm run lite'"
回答4:
Is different for MAC and Windows machines. User single quotes on MAC and "\ "\ on windows. Also downgrade to parallelshell to 3.0.1 to work with \"
回答5:
I changed to use concurrently package, and it works well for me on win64, the method mentioned is in the post.
I just simply use
"watch:all": "concurrently \"npm run watch:scss\" \"npm run lite\""
to replace
"watch:all": "parallelshell \"npm run watch:scss\" \"npm run lite\""
回答6:
All correct to be run on Windows OS. Just simply try to install parallelshell@3.0.1:
npm install --save-dev parallelshell@3.0.1
and then call npm start again.
回答7:
This is a common issue can not be fixed using npm audit fix. All you can do is to copy the actual index.js file of parallelshell into your node_modules directory.
So to do it below are the instructions:
1. Go to https://raw.githubusercontent.com/darkguy2008/parallelshell/master/index.js
2. Copy the content here.
3. Now go to the directory of your project, it may be something like /project/node_modules/parallelshell/index.js
4. Inside the index.js replace the contents with the one you copied from the link in Step 1.
5. Save the file and exit.
Hope this fix will work for you.
来源：https://stackoverflow.com/questions/51060296/how-do-you-correctly-use-parallelshell-with-npm-scripts