node-version-checker

node-version-checker

Tool for checking if the current node version matches what is provided in the enginges section of the project's package.json file.

Main functionality:

• Attempts to find a package.json in the current directory or one of its ancestors.
• If package.json is found compare the current version of node with the version specified in the package.json
• If the current version of node does not satisfy the version from package.json throw an error.
• If the current version of node does satisfy the version from package.json print a friendly message that everything is ok.

Options:

• loose instead of checking semver.satisfies checks only if the current version is greater than the requested version
• switch if the versions do not match attempt to use the n package manager to switch to a compliant node version

install

Easy command line usage: npm install -g node-version-checker

Dev dependency: npm install node-version-checker --save-dev

Command Line Usage

Usage: nvc [options]

Options:
  --loose   Check only that the current node version is greater the required
            engine version
  --switch  If the node version doesn't satisfy the engine version attempt to
            use the n pacakage manager to switch the current node version to a
            compliant version.
  -h        Show help                                                  [boolean]

Node Usage

Just require checker and then invoke it.

//Require syntax
var checker = require('node-version-checker').default;
//import syntax
import checker from 'node-version-checker';

Checker will throw an error if the versions don't match the rules. You can optionally pass in an options object to modify behavior:

//Check with default options
checker()
//Check with options provided.
checker({loose: true, switch: false});

Node Options

You can specify the following options when using through node:

const options = {
  //Check only that the current node version is greater the required engine version when set to true.
  //Default is false.
  loose: true || false,
  //If the node version doesn't satisfy the engine version attempt to use the n pacakage manager to switch the current node version to compliant version.
  //Default is false
  switch: true || false
}

Package.json script

{
  "scripts": {
    "checkVer": "node node_modules/node-version-checker"
  }
}