CODEWITHSUNDEEP
javascriptnode.jsnpm
Krzysztof Podmokły
Krzysztof Podmokły

Reputation: 866

Parsing npm command

I have got a script which replaces data in the database and I want to run this script with npm command

package.json

"scripts": {
    "database": "node devData/database.js --delete & node devData/database.js --import"
  },

database.js

if (process.argv[2] === '--import') {
    importData();
} else if (process.env[2] === '--delete') {
    deleteData();
}

The key here is the & I guess. With this solution only the first part of npm command is recognized which is --delete.

I changed npm command in package.json to "node devData/database.js --delete ; node devData/database.js --import" and then inside database.js I'm running forEach to check whether I've got --import or --delete

process.argv.forEach(part => {
    part === '--delete' ? deleteData() : part === '--import' ? importData() : '';
})

Solution works but I have to run it sometimes twice due to uploading same content to db which gives me duplicate error. Thanks for any advice.

Upvotes: 0

Views: 107

Answers (1)

Trott
Trott

Reputation: 70075

You want to run one command and then, after it succeeds, run the second command, right? For that, use && which is the shell "and" operator. (Using a single & instructs the shell to put the first command in the background.)

"scripts": {
    "database": "node devData/database.js --delete && node devData/database.js --import"
  },

With the && operator, the second command runs unless the first command exits with an error code.

Upvotes: 1

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