check-repo-version.js

check-repo-version.js

const semver = require('semver')
const exec = require('child_process').exec
const packageJson = require('./package.json')

const prjName = packageJson.name

function getRemoteVer() {
    return new Promise((resolve, reject) => {
        const theCmd = 'npm show ' + prjName + ' version --registry=http://example.com'
        exec(theCmd, function(err, stdout, stderr) {
            if (err) {
                reject(err)
            } else {
                resolve(stdout.trim())
            }
        })
    })
}
getRemoteVer().then(remoteVer => {
    console.log('Remote version is: ' + remoteVer)
    console.log('Current version is: ' + packageJson.version)
    if (remoteVer === packageJson.version) {
        console.log('Error: current version is already been built')
        process.exit(1)
    }
    if (semver.gt(remoteVer, packageJson.version)) {
        console.log('Error: current version is out of date')
        process.exit(2)
    }
})