Fix rendering to main view on windows

pkg/tasks/tasks.go

@@ -164,6 +164,20 @@ func (self *ViewBufferManager) NewCmdTask(start func() (*exec.Cmd, io.Reader), p
 		scanner := bufio.NewScanner(r)
 		scanner.Split(bufio.ScanLines)
 
+		data := make(chan []byte)
+
+		// We're reading from the scanner in a separate goroutine because on windows
+		// if running git through a shim, we sometimes kill the parent process without
+		// killing its children, meaning the scanner blocks forever. This solution
+		// leaves us with a dead goroutine, but it's better than blocking all
+		// rendering to main views.
+		go utils.Safe(func() {
+			for scanner.Scan() {
+				data <- scanner.Bytes()
+			}
+			close(data)
+		})
+
 		loaded := false
 
 		go utils.Safe(func() {
@@ -203,13 +217,15 @@ func (self *ViewBufferManager) NewCmdTask(start func() (*exec.Cmd, io.Reader), p
 					break outer
 				case linesToRead := <-self.readLines:
 					for i := 0; i < linesToRead.Total; i++ {
+						var ok bool
+						var line []byte
 						select {
 						case <-opts.Stop:
 							break outer
-						default:
+						case line, ok = <-data:
+							break
 						}
 
-						ok := scanner.Scan()
 						loadingMutex.Lock()
 						if !loaded {
 							self.beforeStart()
@@ -226,7 +242,7 @@ func (self *ViewBufferManager) NewCmdTask(start func() (*exec.Cmd, io.Reader), p
 							self.onEndOfInput()
 							break outer
 						}
-						writeToView(append(scanner.Bytes(), '\n'))
+						writeToView(append(line, '\n'))
 
 						if i+1 == linesToRead.InitialRefreshAfter {
 							// We have read enough lines to fill the view, so do a first refresh