Include imager functionality again which was removed by previous git commit

scripts/imager.py

@@ -32,13 +32,16 @@ if platform.system() == "Windows":
     import win32com.client
 
 def dd_iso_image(dd_progress_thread):
-    try:
-        _dd_iso_image(dd_progress_thread)
-    except:
-        o = io.StringIO()
-        traceback.print_exc(None, o)
-        log(o.getvalue())
-        dd_progress_thread.set_error(o.getvalue())
+    if platform.system() == "Windows":
+      dd_win()
+    else:
+      try:
+          _dd_iso_image(dd_progress_thread)
+      except:
+          o = io.StringIO()
+          traceback.print_exc(None, o)
+          log(o.getvalue())
+          dd_progress_thread.set_error(o.getvalue())
 
 def _dd_iso_image(dd_progress_thread):
     pbar = progressbar.ProgressBar(
@@ -52,25 +55,25 @@ def _dd_iso_image(dd_progress_thread):
     ).start()
 
 
-    while dd_process.poll() is None:
-        time.sleep(0.1)  # If this time delay is not given, the Popen does not execute the actual command
-        dd_process.send_signal(signal.SIGUSR1)
-        dd_process.stderr.flush()
-        while True:
-            time.sleep(0.1)
-            out_error = dd_process.stderr.readline().decode()
-            if out_error:
-                if 'bytes' in out_error:
-                    copied = int(out_error.split(' ', 1)[0])
-                    config.imager_percentage = round((float(copied) / float(in_file_size) * 100))
-                    pbar.update(config.imager_percentage)
-                    break
+    def gui_update(percentage):
+        config.imager_percentage = percentage
+        pbar.update(percentage)
 
-    if dd_process.poll() is not None:
-        log("\nExecuting ==> sync")
-        os.sync()
-        log("ISO has been written to USB disk...")
-        return
+    unmounted_contexts = [
+        (usb.UnmountedContext(p[0], config.update_usb_mount), p[0]) for p
+        in udisks.find_partitions_on(config.usb_disk)]
+    really_unmounted = []
+    try:
+        for c, pname in unmounted_contexts:
+                c.__enter__()
+                really_unmounted.append((c, pname))
+        error = osdriver.dd_iso_image(
+            config.image_path, config.usb_disk, gui_update)
+        if error:
+            dd_progress_thread.set_error(error)
+    finally:
+        for c, pname in really_unmounted:
+                c.__exit__(None, None, None)
 
 
 def dd_win_clean_usb(usb_disk_no):
@@ -97,7 +100,6 @@ def dd_win():
     _output = "of=\\\.\\PhysicalDrive" + str(usb_disk_no)
     if dd_win_clean_usb(usb_disk_no) is False:
         return
-    # of=\\.\PhysicalDrive1
     # _output = "od=" + config.usb_disk # 'od=' option should also work.
     # command = [windd, _input, _output, "bs=1M", "--progress"]
     command = windd + ' ' + _input + ' ' + _output + " bs=1M" + " --progress"
@@ -123,27 +125,6 @@ def dd_win():
 
         return
 
-    def gui_update(percentage):
-        config.imager_percentage = percentage
-        pbar.update(percentage)
-
-    unmounted_contexts = [
-        (usb.UnmountedContext(p[0], config.update_usb_mount), p[0]) for p
-        in udisks.find_partitions_on(config.usb_disk)]
-    really_unmounted = []
-    try:
-        for c, pname in unmounted_contexts:
-                c.__enter__()
-                really_unmounted.append((c, pname))
-        error = osdriver.dd_iso_image(
-            config.image_path, config.usb_disk, gui_update)
-        if error:
-            dd_progress_thread.set_error(error)
-    finally:
-        for c, pname in really_unmounted:
-                c.__exit__(None, None, None)
-
-
 
 class Imager(QtWidgets.QMainWindow, Ui_MainWindow):
     """