Move prune to common module

common.js

@@ -1,4 +1,5 @@
 var asar = require('asar')
+var child = require('child_process')
 var path = require('path')
 var rimraf = require('rimraf')
 
@@ -15,6 +16,17 @@ module.exports = {
     })
   },
 
+  prune: function prune (opts, cwd, cb, nextStep) {
+    if (opts.prune) {
+      child.exec('npm prune --production', { cwd: cwd }, function pruned (err) {
+        if (err) return cb(err)
+        nextStep()
+      })
+    } else {
+      nextStep()
+    }
+  },
+
   userIgnoreFilter: function userIgnoreFilter (opts, is_win32, finalDir) {
     return function filter (file) {
       if (is_win32) {

linux.js

@@ -1,6 +1,5 @@
 var path = require('path')
 var fs = require('fs')
-var child = require('child_process')
 var mkdirp = require('mkdirp')
 var ncp = require('ncp').ncp
 var common = require('./common')
@@ -29,14 +28,7 @@ module.exports = {
     function copyUserApp () {
       ncp(opts.dir, userAppDir, {filter: common.userIgnoreFilter(opts, false, finalDir), dereference: true}, function copied (err) {
         if (err) return cb(err)
-        if (opts.prune) {
-          prune(function pruned (err) {
-            if (err) return cb(err)
-            renameElectronBinary()
-          })
-        } else {
-          renameElectronBinary()
-        }
+        common.prune(opts, userAppDir, cb, renameElectronBinary)
       })
     }
 
@@ -51,10 +43,6 @@ module.exports = {
       })
     }
 
-    function prune (cb) {
-      child.exec('npm prune --production', { cwd: userAppDir }, cb)
-    }
-
     function appFilter (file) {
       return file.match(/default_app/) === null
     }

mac.js

@@ -72,19 +72,6 @@ function buildMacApp (opts, cb, newApp) {
   ncp(opts.dir, paths.app, {filter: common.userIgnoreFilter(opts), dereference: true}, function copied (err) {
     if (err) return cb(err)
 
-    if (opts.prune) {
-      prune(function pruned (err) {
-        if (err) return cb(err)
-        moveApp()
-      })
-    } else {
-      moveApp()
-    }
-
-    function prune (cb) {
-      child.exec('npm prune --production', { cwd: paths.app }, cb)
-    }
-
     function moveApp () {
       // finally, move app into cwd
       var outdir = opts.out || process.cwd()
@@ -134,5 +121,7 @@ function buildMacApp (opts, cb, newApp) {
         cb(err, appPath)
       })
     }
+
+    common.prune(opts, paths.app, cb, moveApp)
   })
 }

win32.js

@@ -1,6 +1,5 @@
 var os = require('os')
 var path = require('path')
-var child = require('child_process')
 
 var mkdirp = require('mkdirp')
 var rimraf = require('rimraf')
@@ -54,19 +53,6 @@ function buildWinApp (opts, cb, newApp) {
   ncp(opts.dir, paths.app, {filter: common.userIgnoreFilter(opts, true), dereference: true}, function copied (err) {
     if (err) return cb(err)
 
-    if (opts.prune) {
-      prune(function pruned (err) {
-        if (err) return cb(err)
-        moveApp()
-      })
-    } else {
-      moveApp()
-    }
-
-    function prune (cb) {
-      child.exec('npm prune --production', { cwd: paths.app }, cb)
-    }
-
     function moveApp () {
       // finally, move app into cwd
       var finalPath = path.join(opts.out || process.cwd(), opts.name + '-win32')
@@ -97,5 +83,7 @@ function buildWinApp (opts, cb, newApp) {
         cb(err, finalPath)
       })
     }
+
+    common.prune(opts, paths.app, cb, moveApp)
   })
 }