DmgImageMounter: Check if image mounted and always unmount image #579
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This change checks whether the DMG image is already mounted and unmounts the image even if an exception gets thrown during the extraction. We check the exit code of the mount and unmount process too.
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This change checks whether the DMG image is already mounted and unmounts the image even if an exception gets thrown during the extraction. We check the exit code of the mount and unmount process too.