pushes/atlas: Look for the uploader bin in the embedded dir

plugins/pushes/atlas/push.rb

@@ -43,10 +43,12 @@ module VagrantPlugins
         end
 
         if Vagrant.in_installer?
-          # TODO: look up uploader in embedded dir
+          path = File.join(
-        else
+            Vagrant.installer_embedded_dir, "bin", UPLOADER_BIN)
-          return Vagrant::Util::Which.which(UPLOADER_BIN)
+          return path if File.file?(path)
         end
+
+        return Vagrant::Util::Which.which(UPLOADER_BIN)
       end
     end
   end

test/unit/plugins/pushes/atlas/push_test.rb

@@ -6,6 +6,8 @@ require Vagrant.source_root.join("plugins/pushes/atlas/push")
 describe VagrantPlugins::AtlasPush::Push do
   include_context "unit"
 
+  let(:bin) { VagrantPlugins::AtlasPush::Push::UPLOADER_BIN }
+
   let(:env) do
     double("env",
       root_path: File.expand_path("..", __FILE__)
@@ -99,6 +101,32 @@ describe VagrantPlugins::AtlasPush::Push do
       expect(subject.uploader_path).to eq("bar")
     end
 
+    it "should look up the uploader in the embedded dir if installer" do
+      dir = temporary_dir
+
+      allow(Vagrant).to receive(:in_installer?).and_return(true)
+      allow(Vagrant).to receive(:installer_embedded_dir).and_return(dir.to_s)
+
+      bin_path = dir.join("bin", bin)
+      bin_path.dirname.mkpath
+      bin_path.open("w+") { |f| f.write("hi") }
+
+      expect(subject.uploader_path).to eq(bin_path.to_s)
+    end
+
+    it "should look up the uploader in the PATH if not in the installer" do
+      dir = temporary_dir
+
+      allow(Vagrant).to receive(:in_installer?).and_return(true)
+      allow(Vagrant).to receive(:installer_embedded_dir).and_return(dir.to_s)
+
+      expect(Vagrant::Util::Which).to receive(:which).
+        with(described_class.const_get(:UPLOADER_BIN)).
+        and_return("bar")
+
+      expect(subject.uploader_path).to eq("bar")
+    end
+
     it "should return nil if its not found anywhere" do
       allow(Vagrant).to receive(:in_installer?).and_return(false)
       allow(Vagrant::Util::Which).to receive(:which).and_return(nil)