#!/usr/bin/env node

const now = Date.now()

const {

readFileSync,

readJSONSync,

writeFileSync,

copySync,

removeSync

} = require('fs-extra')

const { resolve } = require('path')

// Dirs

const rootDir = resolve(__dirname, '..')

const startDir = resolve(rootDir, 'start')

// Read main package.json

const packageJSON = readJSONSync(resolve(rootDir, 'package.json'))

// Required and Excluded packages for start

let requires = ['source-map-support', 'pretty-error', 'minimist']

const excludes = ['path', 'fs', 'http', 'module'].concat(

Object.keys(packageJSON.devDependencies)

)

// Parse dist/core.js for all external dependencies

const requireRegex = /require\('([-@/\w]+)'\)/g

const rawCore = readFileSync(resolve(rootDir, 'dist/core.js'))

let match = requireRegex.exec(rawCore)

while (match) {

requires.push(match[1])

match = requireRegex.exec(rawCore)

}

// Apply Excludes

requires = requires.filter(r => excludes.indexOf(r) === -1)

// Resolve version constrains

let dependencies = {}

requires.forEach(r => {

if (!packageJSON.dependencies[r]) {

// eslint-disable-next-line no-console

console.warn('Cannot resolve dependency version for ' + r)

return

}

dependencies[r] = packageJSON.dependencies[r]

})

// Drop fields

let drops = ['devDependencies', 'scripts', 'nyc', 'types']

drops.forEach(k => {

delete packageJSON[k]

})

// Update dependencies

packageJSON.dependencies = dependencies

// Update package meta

packageJSON.name = 'nuxt-start'

packageJSON.description = 'runtime-only build for nuxt'

packageJSON.bin = {

'nuxt-start': './bin/nuxt-start'

}

// Update package.json

writeFileSync(

resolve(startDir, 'package.json'),

JSON.stringify(packageJSON, null, 2)

)

// Copy required files

const excludeFiles = ['README.md', '.gitignore']

packageJSON.files.forEach(file => {

if (excludeFiles.indexOf(file) !== -1) {

return

}

let src = resolve(rootDir, file)

let dst = resolve(startDir, file)

// console.log(relative(rootDir, src), '~>', relative(rootDir, dst))

removeSync(dst)

copySync(src, dst)

})

// Remove extras

const extraFiles = [

'bin/nuxt-build',

'bin/nuxt-generate',

'bin/nuxt-dev',

'bin/nuxt',

'dist/nuxt.js',

'dist/nuxt.js.map'

]

extraFiles.forEach(file => {

removeSync(resolve(startDir, file))

})

// Patch index.js

const startIndexjs = resolve(startDir, 'index.js')

writeFileSync(

startIndexjs,

String(readFileSync(startIndexjs)).replace('./dist/nuxt', './dist/core')

)

// Patch bin/nuxt-start

const binStart = resolve(startDir, 'bin/nuxt-start')

writeFileSync(

binStart,

String(readFileSync(binStart)).replace(/nuxt start/g, 'nuxt-start')

)

// eslint-disable-next-line no-console

console.log(

`Generated ${packageJSON.name}@${packageJSON.version} in ${Date.now() -

now}ms`

)