support `now.files` in now.json

Needs a test case still...

lib/get-files.js

@@ -24,11 +24,14 @@ const IGNORED = require('./ignored')
  * @return {Array} comprehensive list of paths to sync
  */
 
-async function npm(path, pkg, {
+async function npm(path, pkg, nowConfig = {}, {
   limit = null,
   debug = false
 } = {}) {
-  const whitelist = pkg.now && pkg.now.files ? pkg.now.files : pkg.files
+  const whitelist = nowConfig.files || pkg.files
+
+  // the package.json `files` whitelist still
+  // honors ignores: https://docs.npmjs.com/files/package.json#files
   const search_ = whitelist || ['.']
   // convert all filenames into absolute paths
   const search = Array.prototype.concat.apply([], (await Promise.all(search_.map(file => glob(file, {cwd: path, absolute: true, dot: true})))))
@@ -125,12 +128,16 @@ const asAbsolute = function (path, parent) {
  * @return {Array} comprehensive list of paths to sync
  */
 
-async function docker(path, {
+async function docker(path, nowConfig = {}, {
   limit = null,
   debug = false
 } = {}) {
+  const whitelist = nowConfig.files
+
   // base search path
-  const search_ = ['.']
+  // the now.json `files` whitelist still
+  // honors ignores: https://docs.npmjs.com/files/package.json#files
+  const search_ = whitelist || ['.']
 
   // convert all filenames into absolute paths
   const search = search_.map(file => asAbsolute(file, path))
@@ -262,7 +269,7 @@ const explode = async function (paths, {accepts, debug}) {
 
 const maybeRead = async function (path, default_ = '') {
   try {
-    return (await readFile(path, 'utf8'))
+    return await readFile(path, 'utf8')
   } catch (err) {
     return default_
   }

lib/index.js

@@ -65,9 +65,9 @@ module.exports = class Now extends EventEmitter {
     }
 
     if (deploymentType === 'npm') {
-      files = await getNpmFiles(path, pkg, {debug: this._debug})
+      files = await getNpmFiles(path, pkg, nowConfig, {debug: this._debug})
     } else {
-      files = await getDockerFiles(path, {debug: this._debug})
+      files = await getDockerFiles(path, nowConfig, {debug: this._debug})
     }
 
     if (this._debug) {

lib/read-metadata.js

@@ -12,7 +12,7 @@ const listPackage = {
   }
 }
 
-module.exports = async function (path, {
+module.exports = async function getMetadata (path, {
   deploymentType = 'npm',
   deploymentName,
   quiet = false,
@@ -26,8 +26,7 @@ module.exports = async function (path, {
   let description
 
   try {
-    nowConfig = await readFile(resolvePath(path, 'now.json'))
-    nowConfig = JSON.parse(nowConfig)
+    nowConfig = JSON.parse(await readFile(resolvePath(path, 'now.json')))
   } catch (err) {
     // if the file doesn't exist then that's fine; any other error bubbles up
     if (err.code !== 'ENOENT') {
@@ -42,8 +41,7 @@ module.exports = async function (path, {
       pkg = listPackage
     } else {
       try {
-        pkg = await readFile(resolvePath(path, 'package.json'))
-        pkg = JSON.parse(pkg)
+        pkg = JSON.parse(await readFile(resolvePath(path, 'package.json')))
       } catch (err) {
         const e = Error(`Failed to read JSON in "${path}/package.json"`)
         e.userError = true

test/index.js

@@ -7,22 +7,18 @@ const {asc: alpha} = require('alpha-sort')
 const {readFile} = require('fs-promise')
 
 // Ours
-const {npm: getNpmFiles_, docker: getDockerFiles} = require('../lib/get-files')
 const hash = require('../lib/hash')
+const readMetadata = require('../lib/read-metadata')
+const {npm: getNpmFiles_, docker: getDockerFiles} = require('../lib/get-files')
 
 const prefix = join(__dirname, '_fixtures') + '/'
 const base = path => path.replace(prefix, '')
 const fixture = name => resolve(`./test/_fixtures/${name}`)
 
-const readJSON = async file => {
-  const data = await readFile(file)
-  return JSON.parse(data)
-}
-
 // overload to force debugging
-const getNpmFiles = async dir => {
-  const pkg = await readJSON(resolve(dir, 'package.json'))
-  return getNpmFiles_(dir, pkg)
+const getNpmFiles = async (dir) => {
+  const { pkg, nowConfig } = await readMetadata(dir, { quiet: true, strict: false })
+  return getNpmFiles_(dir, pkg, nowConfig)
 }
 
 test('`files`', async t => {