if-node-version

Run a shell command if it's on the node of specified versions.

$ if-node-version ">=4" eslint lib test

$ if-node-version "<6" node ./scripts/fallback.js

Maybe this helps you together with npm-scripts.

Installation

if-node-version can be installed with npm.

$ npm install --save-dev if-node-version

if-node-version requires Node.js >=0.10.0

Usage

CLI

Usage:
    $ if-node-version <VersionRange> <Command> [...args]

        Run a shell command if it's on the node of specified versions.
        Otherwise, do nothing.

        Exit code is the exit code of the <Command>.

    $ if-node-version <VersionRange>

        Check if it's on the node of specified versions.

        Exit code is 0 if it's on the node of specified versions.
        Otherwise, exit code is 1.

    $ if-node-version --help

        Show this help text.

    $ if-node-version --version

        Show the version number of `if-node-version` command.

Parameters:
    <VersionRange> .... A text which specifies the version range of Node.js
                        This text format is defined by node-semver module:
                        https://www.npmjs.com/package/semver#ranges
    <Command> ......... The shell command to execute.
    [...args] ......... Parameters of the shell command.

Examples:
    $ if-node-version ">=4" eslint lib test
    $ if-node-version "<6" node ./scripts/fallback.js

Node API

var spawnIfNodeVersion = require("if-node-version")

spawnIfNodeVersion(versionRange, command, args, options)

Spawn a child process with specified parameters if the node version satisfies a given version range.

This function returns child_process.ChildProcess object.

versionRange {string} - A text which specifies the version range of Node.js. This text format is defined by node-semver module: https://www.npmjs.com/package/semver#ranges
command {string} - The command to run.
args {Array.<string>} - List of string arguments.
options {object} - An option object. See the document of child_process.spawn

spawnIfNodeVersion.sync(versionRange, command, args, options)

This is synchronous version of spawnIfNodeVersion(versionRange, command, args, options).

This function returns the object as same as child_process.spawnSync.

Note: If you use this function on node 0.10, you will also need to install spawn-sync.

Changelogs

GitHub Releases

Contributing

Welcome your contributions!
Please use GitHub's issues/PRs.

Tools to develop

npm install installs dependencies.
npm test runs tests and measures coverage.
npm run coverage opens the coverage result of npm test.
npm run clean removes the coverage result of npm test.
npm run lint analyzes codes by ESLint.
npm run watch runs tests (without coverage measurement) when source code is modified.

romulotunala/if-node-version