Fixes #1244, Add a check for upload iso hash to ESXi Driver

builder/vmware/iso/driver_esx5.go

@@ -84,7 +84,7 @@ func (d *ESX5Driver) Unregister(vmxPathLocal string) error {
 	return d.sh("vim-cmd", "vmsvc/unregister", d.vmId)
 }
 
-func (d *ESX5Driver) UploadISO(localPath string) (string, error) {
+func (d *ESX5Driver) UploadISO(localPath string, checksum string, checksumType string) (string, error) {
 	cacheRoot, _ := filepath.Abs(".")
 	targetFile, err := filepath.Rel(cacheRoot, localPath)
 	if err != nil {
@@ -96,6 +96,12 @@ func (d *ESX5Driver) UploadISO(localPath string) (string, error) {
 		return "", err
 	}
 
+	log.Printf("Verifying checksum of %s", finalPath)
+	if d.verifyChecksum(checksumType, checksum, finalPath) {
+		log.Println("Initial checksum matched, no upload needed.")
+		return finalPath, nil
+	}
+
 	if err := d.upload(finalPath, localPath); err != nil {
 		return "", err
 	}

builder/vmware/iso/remote_driver.go

@@ -10,7 +10,7 @@ type RemoteDriver interface {
 	// UploadISO uploads a local ISO to the remote side and returns the
 	// new path that should be used in the VMX along with an error if it
 	// exists.
-	UploadISO(string) (string, error)
+	UploadISO(string, string, string) (string, error)
 
 	// Adds a VM to inventory specified by the path to the VMX given.
 	Register(string) error

builder/vmware/iso/remote_driver_mock.go

@@ -21,7 +21,7 @@ type RemoteDriverMock struct {
 	UnregisterErr    error
 }
 
-func (d *RemoteDriverMock) UploadISO(path string) (string, error) {
+func (d *RemoteDriverMock) UploadISO(path string, checksum string, checksumType string) (string, error) {
 	d.UploadISOCalled = true
 	d.UploadISOPath = path
 	return d.UploadISOResult, d.UploadISOErr

builder/vmware/iso/step_remote_upload.go

@@ -29,9 +29,13 @@ func (s *stepRemoteUpload) Run(state multistep.StateBag) multistep.StepAction {
 		return multistep.ActionContinue
 	}
 
+	config := state.Get("config").(*config)
+	checksum := config.ISOChecksum
+	checksumType := config.ISOChecksumType
+
 	ui.Say(s.Message)
 	log.Printf("Remote uploading: %s", path)
-	newPath, err := remote.UploadISO(path)
+	newPath, err := remote.UploadISO(path, checksum, checksumType)
 	if err != nil {
 		err := fmt.Errorf("Error uploading file: %s", err)
 		state.Put("error", err)