NPM check engines

npm-check-engines upgrades your package.json node engines constraint to the most restrictive used by your dependencies.

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Table of Contents

• Prerequisites
• Installation
• Usage
  • CLI
  • Node
• CLI Options
• Debug
• Thanks

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Prerequisites

• Node.JS version ^18.12.0 || ^20.0.0

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Installation

Install globally:

npm install -g @smarlhens/npm-check-engines

Or run with npx:

npx @smarlhens/npm-check-engines

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Usage

CLI

Show the most restrictive constraint (opinionated) of the node engine for the project in the current directory based on the npm package-lock.json file:

$ nce
✔ Computed engines range constraints:

 node  *  →  ^14.17.0 || ^16.10.0 || >=17.0.0

Run nce -u to upgrade package.json.

Upgrade a project's package.json file:

$ nce -u
✔ Computed engines range constraints:

 node  *  →  ^14.17.0 || ^16.10.0 || >=17.0.0

Node

import { checkEnginesFromString, validatePackageJson, validatePackageLock } from '@smarlhens/npm-check-engines';

let packageJsonString = ''; // load content of package.json as stringified JSON
let packageLockString = ''; // load content of package-lock.json as stringified JSON

validatePackageJson({ packageJsonString }); // can throw Errors if unexpected format
validatePackageLock({ packageLockString }); // can throw Errors if unexpected format

// packageJson is the content of your package.json with updated engines
// packageLock is the content of your package-lock.json with updated engines of the root project in packages
// enginesRangeToSet contains changes if you want to display them
const { enginesRangeToSet, packageJson, packageLock } = checkEnginesFromString({
  packageJsonString,
  packageLockString,
});
console.log(packageJson);
console.log(packageLock);
console.log(
  enginesRangeToSet
    .map(({ engine, range, rangeToSet }) => `${engine} range "${range}" replaced by "${rangeToSet}"`)
    .join('\n'),
);

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CLI Options

Usage: nce [options]

Options:
  -q, --quiet    Enable quiet mode.                                             [boolean] [default: false]
  -d, --debug    Enable debug mode. Can be used with environment variable DEBUG=nce.
                                                                                [boolean] [default: false]
  -v, --verbose  A little more detailed than the default output.                [boolean] [default: false]
  -e, --engines  Select engines to check. Default will check all engines defined.                  [array]
  -u, --update   Update engines in package.json and package-lock.json.          [boolean] [default: false]
      --enableEngineStrict  Enable engine strict.                               [boolean] [default: false]
      --help     Show help                                                                       [boolean]
      --version  Show version number                                                             [boolean]

Examples:
  nce                 Check package-lock.json file in current working directory.

© 2023 Samuel MARLHENS

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Debug

$ DEBUG=* nce -d

output with debug

[STARTED] Checking npm package engines range constraints in package-lock.json...
[STARTED] Reading package-lock.json...
[SUCCESS] Reading package-lock.json...
[STARTED] Reading package.json...
[SUCCESS] Reading package.json...
[STARTED] Validating package-lock.json...
[SUCCESS] Validating package-lock.json...
[STARTED] Validating package.json...
[SUCCESS] Validating package.json...
[STARTED] Compute engines range constraints...
  nce:node Package  has no constraints for current engine +0ms
  nce:node Final computed engine range constraint: * +1ms
  nce:node Package  has no engines +0ms
  nce:node Compare: * and >=6.9.0 +1ms
  nce:node Range >=6.9.0 is a subset of * +1ms
  nce:node New most restrictive range: >=6.9.0 +0ms
  nce:node Compare: >=6.9.0 and >=12.22.0 +0ms
  nce:node Range >=12.22.0 is a subset of >=6.9.0 +0ms
  nce:node New most restrictive range: >=12.22.0 +0ms
  nce:node Ignored range: * +0ms
  nce:node Compare: >=12.22.0 and >=7.0.0 +1ms
  nce:node Range >=12.22.0 is a subset of >=7.0.0 +0ms
  nce:node Package node_modules/noengines has no engines +0ms
  nce:node Compare: >=12.22.0 and >=12.13.0 <13.0.0-0||>=14.15.0 <15.0.0-0||>=16.10.0 <17.0.0-0||>=17.0.0 +1ms
  nce:node Applying minimal version 12.22.0 to both ranges. +0ms
  nce:node Compare: >=12.22.0 and >=12.22.0 <13.0.0-0||>=14.15.0 <15.0.0-0||>=16.10.0 <17.0.0-0||>=17.0.0 +1ms
  nce:node Range >=12.22.0 <13.0.0-0||>=14.15.0 <15.0.0-0||>=16.10.0 <17.0.0-0||>=17.0.0 is a subset of >=12.22.0 +0ms
  nce:node New most restrictive range: >=12.22.0 <13.0.0-0||>=14.15.0 <15.0.0-0||>=16.10.0 <17.0.0-0||>=17.0.0 +0ms
  nce:node Compare: >=12.22.0 <13.0.0-0||>=14.15.0 <15.0.0-0||>=16.10.0 <17.0.0-0||>=17.0.0 and >=16.0.0||>=14.17.0 <15.0.0-0 +1ms
  nce:node Applying minimal version 14.17.0 to both ranges. +0ms
  nce:node Compare: >=14.17.0 <15.0.0-0||>=16.10.0 <17.0.0-0||>=17.0.0 and >=14.17.0 <15.0.0-0||>=16.0.0 +0ms
  nce:node Range >=14.17.0 <15.0.0-0||>=16.10.0 <17.0.0-0||>=17.0.0 is a subset of >=14.17.0 <15.0.0-0||>=16.0.0 +0ms
  nce:node New most restrictive range: >=14.17.0 <15.0.0-0||>=16.10.0 <17.0.0-0||>=17.0.0 +1ms
  nce:node Final computed engine range constraint: >=14.17.0 <15.0.0-0||>=16.10.0 <17.0.0-0||>=17.0.0 +0ms
  nce:npm Package  has no constraints for current engine +0ms
  nce:npm Final computed engine range constraint: * +0ms
  nce:npm Package  has no engines +0ms
  nce:npm Package node_modules/foo has no constraints for current engine +0ms
  nce:npm Compare: * and >=6.0.0 +1ms
  nce:npm Range >=6.0.0 is a subset of * +0ms
  nce:npm New most restrictive range: >=6.0.0 +0ms
  nce:npm Package node_modules/all has no constraints for current engine +0ms
  nce:npm Package node_modules/arr has no constraints for current engine +0ms
  nce:npm Package node_modules/noengines has no engines +0ms
  nce:npm Package node_modules/complex1 has no constraints for current engine +0ms
  nce:npm Package node_modules/complex2 has no constraints for current engine +0ms
  nce:npm Final computed engine range constraint: >=6.0.0 +0ms
  nce:yarn Package  has no constraints for current engine +0ms
  nce:yarn Final computed engine range constraint: * +0ms
  nce:yarn Package  has no engines +0ms
  nce:yarn Package node_modules/foo has no constraints for current engine +1ms
  nce:yarn Compare: * and >=1.22.4 <2.0.0-0 +0ms
  nce:yarn Range >=1.22.4 <2.0.0-0 is a subset of * +0ms
  nce:yarn New most restrictive range: >=1.22.4 <2.0.0-0 +0ms
  nce:yarn Package node_modules/all has no constraints for current engine +0ms
  nce:yarn Package node_modules/arr has no constraints for current engine +0ms
  nce:yarn Package node_modules/noengines has no engines +0ms
  nce:yarn Package node_modules/complex1 has no constraints for current engine +0ms
  nce:yarn Package node_modules/complex2 has no constraints for current engine +0ms
  nce:yarn Final computed engine range constraint: >=1.22.4 <2.0.0-0 +0ms
[SUCCESS] Compute engines range constraints...
[STARTED] Output computed engines range constraints...
  nce:node Simplified computed engine range constraint: ^14.17.0 || ^16.10.0 || >=17.0.0 +0ms
  nce:npm Simplified computed engine range constraint: >=6.0.0 +0ms
  nce:yarn Simplified computed engine range constraint: ^1.22.4 +0ms
[TITLE] Computed engines range constraints:
[TITLE]
[TITLE]  node  *  →  ^14.17.0 || ^16.10.0 || >=17.0.0
[TITLE]  npm   *  →  >=6.0.0
[TITLE]  yarn  *  →  ^1.22.4
[TITLE]
[TITLE] Run nce -d -u to upgrade package.json.
[SUCCESS] Output computed engines range constraints...
[STARTED] Enabling engine-strict using .npmrc...
[SKIPPED] Enabling engine-strict is disabled by default.
[STARTED] Updating package.json...
[SKIPPED] Update is disabled by default.
[SUCCESS] Computed engines range constraints:
[SUCCESS]
[SUCCESS]  node  *  →  ^14.17.0 || ^16.10.0 || >=17.0.0
[SUCCESS]  npm   *  →  >=6.0.0
[SUCCESS]  yarn  *  →  ^1.22.4
[SUCCESS]
[SUCCESS] Run nce -d -u to upgrade package.json.

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Thanks

This project is heavily inspired by the following awesome project: npm-check-updates.

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