Update dmverity tool to take a directory as input to create a VHD

[hgarvison]

Update dmverity tool to take a file directory as input, tar it, and create a VHD.

[helsaawy]

i am not sure the tar creation should be part of dmverity/our package, since we are basically always guaranteed that tar/tar.exe is available on whatever machine we run on
or am i missing something?

[hgarvison]

@helsaawy the tar creation is taking a directory of files and tarring it so that it can be run through the tooling to generate a VHD with the merkel tree. This is for the scenario where we are not creating a VHD from image layers, but rather, a directory of other files and subdirectories.

[helsaawy]

This is for the scenario where we are not creating a VHD from image layers, but rather, a directory of other files and subdirectories.

in that scenario, can't you just call tar -cf layer.tar -C directory . to create the tarball?

[hgarvison]

This is for the scenario where we are not creating a VHD from image layers, but rather, a directory of other files and subdirectories.

in that scenario, can't you just call tar -cf layer.tar -C directory . to create the tarball?

Yes, but that adds an extra step for the user.

[anmaxvl]

This is for the scenario where we are not creating a VHD from image layers, but rather, a directory of other files and subdirectories.

in that scenario, can't you just call tar -cf layer.tar -C directory . to create the tarball?

Yes, but that adds an extra step for the user.

I don't think that this should be dmverity-vhd's responsibility to tar though... I feel like we can add functionality to convert non-image tars to VHDs with verity, but the caller should do the tar.

[helsaawy]

LGTM

[helsaawy]

mior nit: we may want to keep the old flag name around just to avoid breaking current usage

Suggested change

	Name: inputFlag + ",i",
	Name: inputFlag + ",image,i",