/**

* npm does not allow you to publish a package with the same version multiple times.

* Thus, to publish prerelease versions tagged to the branch they're built from,

* we need to generate unique version numbers that are also higher than versions already published.

* To achieve this, we append `build<build_number>` to the version number.

* The actual release version can eventually be published without the suffix.

*/

if (

!process.env.TRAVIS_BUILD_NUMBER ||

process.env.TRAVIS_BUILD_NUMBER.length === 0

) {

console.error(

'Could not read the build number to bump the package version - aborting publish.'

)

process.exit(1)

}

const fs = require('fs')

const path = require('path')

const packageJson = require('../package.json')

packageJson.version = `${packageJson.version}build${

process.env.TRAVIS_BUILD_NUMBER

}`

fs.writeFileSync(

path.resolve(__dirname, '../package.json'),

JSON.stringify(packageJson)

)