diskimage: 'push' sub-command is extremely picky about the path syntax

[dplanitzer]

Describe the bug
The 'push' sub-command only accepts very specific kinds of paths and fails with any other kind of path. Eg trying to push a file that resides in the current directory is currently not possible and diskimage returns with an error because it doesn't accept a plain file name as a path.

To Reproduce

1. cd into a directory
2. place a file called 'foo' there
3. do a 'diskimage push foo ...'

Expected behavior
diskimage should push the file without problems.

OS (please complete the following information):

• Version 0.7.0-alpha

[dplanitzer]

This is a known problem.

The path parsing code in diskimage is very simple minded and limited. This should be extended in the future to handle all kinds of valid path properly.