Handle missing self.options for whipper cd info

The attributes working_directory, disc_template, output_directory and offset are not defined during whipper cd info and they are only needed for ripping. self.program.getTable doesn't need output_path to gather the tocfile.

Therefore, this part is excluded, if the attributes don't exist and an offset of 0 is used.

Fixes issue #375.

Co-authored-by: gorgobacka <tho.b.j@gmx.de>
Signed-off-by: JoeLametta <JoeLametta@users.noreply.github.com>
Signed-off-by: gorgobacka <tho.b.j@gmx.de>

whipper/command/cd.py

@@ -134,20 +134,23 @@ def do(self):
             return -1
 
         # Change working directory before cdrdao's task
-        if self.options.working_directory is not None:
+        if getattr(self.options, 'working_directory', False):
             os.chdir(os.path.expanduser(self.options.working_directory))
-        out_bpath = self.options.output_directory.decode('utf-8')
-        # Needed to preserve cdrdao's tocfile
-        out_fpath = self.program.getPath(out_bpath,
-                                         self.options.disc_template,
-                                         self.mbdiscid,
-                                         self.program.metadata)
+        if hasattr(self.options, 'output_directory'):
+            out_bpath = self.options.output_directory.decode('utf-8')
+            # Needed to preserve cdrdao's tocfile
+            out_fpath = self.program.getPath(out_bpath,
+                                             self.options.disc_template,
+                                             self.mbdiscid,
+                                             self.program.metadata)
+        else:
+            out_fpath = None
         # now, read the complete index table, which is slower
+        offset = getattr(self.options, 'offset', 0)
         self.itable = self.program.getTable(self.runner,
                                             self.ittoc.getCDDBDiscId(),
                                             self.ittoc.getMusicBrainzDiscId(),
-                                            self.device, self.options.offset,
-                                            out_fpath)
+                                            self.device, offset, out_fpath)
 
         assert self.itable.getCDDBDiscId() == self.ittoc.getCDDBDiscId(), \
             "full table's id %s differs from toc id %s" % (