feat(util): use promises for api

BREAKING CHANGE: fix-owner now uses Promises instead of callbacks

lib/util/fix-owner.js

@@ -1,45 +1,44 @@
 'use strict'
 
-var chownr = require('chownr')
-var dezalgo = require('dezalgo')
-var inflight = require('inflight')
-var mkdirp = require('mkdirp')
+const Promise = require('bluebird')
+
+const chownr = Promise.promisify(require('chownr'))
+const mkdirp = Promise.promisify(require('mkdirp'))
 
 module.exports.chownr = fixOwner
-function fixOwner (filepath, uid, gid, cb) {
-  cb = dezalgo(cb)
+function fixOwner (filepath, uid, gid) {
   if (!process.getuid) {
     // This platform doesn't need ownership fixing
-    return cb()
+    return Promise.resolve()
   }
   if (typeof uid !== 'number' && typeof gid !== 'number') {
     // There's no permissions override. Nothing to do here.
-    return cb()
+    return Promise.resolve()
   }
   if ((typeof uid === 'number' && process.getuid() === uid) &&
       (typeof gid === 'number' && process.getgid() === gid)) {
     // No need to override if it's already what we used.
-    return cb()
-  }
-  cb = inflight('fixOwner: fixing ownership on ' + filepath, cb)
-  if (!cb) {
-    // We're inflight! whoosh!
-    return
+    return Promise.resolve()
   }
+  // cb = inflight('fixOwner: fixing ownership on ' + filepath, cb)
+  // if (!cb) {
+  //   // We're inflight! whoosh!
+  //   return
+  // }
 
   // *now* we override perms
-  chownr(
+  return chownr(
     filepath,
     typeof uid === 'number' ? uid : process.getuid(),
-    typeof gid === 'number' ? gid : process.getgid(),
-    cb
+    typeof gid === 'number' ? gid : process.getgid()
   )
 }
 
 module.exports.mkdirfix = mkdirfix
 function mkdirfix (p, uid, gid, cb) {
-  mkdirp(p, function (err, made) {
-    if (err || !made) { return cb(err, made) }
-    fixOwner(made, uid, gid, cb)
+  return mkdirp(p).then(made => {
+    if (made) {
+      return fixOwner(made, uid, gid).then(() => made)
+    }
   })
 }