Move GetVolumeID to common lib

client/update_grub.py

@@ -1,15 +1,13 @@
 #!/usr/bin/python3
 
+import lib
 import os
-import re
 import string
-import subprocess
 import tempfile
 
 
 class GrubUpdater(object):
 
-  _VOLUME_ID_REGEX = re.compile(b'^Volume id: (?P<volume_id>.+)$', re.MULTILINE)
   _HOTKEYS = string.digits + string.ascii_letters
 
   def __init__(self, image_dir, boot_dir):
@@ -20,15 +18,6 @@ class GrubUpdater(object):
 
     self._image_path = '/' + os.path.relpath(self._image_dir, self._boot_dir)
 
-  def _GetVolumeID(self, path):
-    isoinfo = subprocess.check_output([
-      'isoinfo',
-      '-d',
-      '-i', path,
-    ])
-    match = self._VOLUME_ID_REGEX.search(isoinfo)
-    return match.group('volume_id').decode('ascii')
-
   def Update(self):
     grub_dir = os.path.join(self._boot_dir, 'grub')
 
@@ -63,7 +52,7 @@ menuentry "%(image_filename)s (%(volume_id)s)" --hotkey=%(hotkey)s {
             'image_filename': filename,
             'image_path': self._image_path,
             'hotkey': self._HOTKEYS[i],
-            'volume_id': self._GetVolumeID(os.path.join(self._image_dir, filename)),
+            'volume_id': lib.GetVolumeID(os.path.join(self._image_dir, filename)),
           })
 
         fh.flush()