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support.js
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support.js
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import fs from 'fs-extra'
import path from 'path'
import cheerio from 'cheerio'
import Promise from 'bluebird'
import _ from 'lodash'
import { spawn as spawnNative } from 'child_process'
const remove = Promise.promisify(fs.remove)
const gatsbyCli = path.resolve('..', '..', 'lib', 'bin', 'cli.js')
const babel = path.resolve('..', '..', 'node_modules', '.bin', 'babel-node')
export function spawn(command, args = [], options = {}) {
return new Promise((resolve, reject) => {
let stdout = ''
let stderr = ''
Object.assign(options, { shell: true })
const child = spawnNative(command, args, options)
child.stdout.on('data', data => {
stdout += data
})
child.stderr.on('data', data => {
stderr += data
})
child.on('error', error => reject({ error, stderr, stdout }))
child.on('exit', code => {
if (code === 0) {
resolve({ code, stdout, stderr })
} else {
reject({ code, stdout, stderr })
}
})
})
}
export function gatsby(args = [], options = {}) {
const spawnArguments = _.concat(['--', gatsbyCli], args)
return spawn(babel, spawnArguments, options)
}
export function build(fixturePath) {
const buildPath = path.resolve(fixturePath, 'public')
return remove(buildPath).then(() => gatsby(['build'], { cwd: fixturePath }))
}
export function dom(filePath) {
const readFile = Promise.promisify(fs.readFile)
return readFile(filePath).then(html => cheerio.load(html))
}