Kraft failes with list index out of range

[gabrielmocanu]

Describe the bug
Right now if you are trying to run the hello-world application you will end up with list index out of range error. This can be for all applications if the name of the directory of the application is different from the name of the application from kraft.yml.

To Reproduce
Steps to reproduce the behavior:

1. git clone [email protected]:unikraft/app-helloworld.git
2. cd app-helloworld
3. kraft configure -p kvm -m x86_64
4. kraft build
5. kraft run

Expected behavior
The error is not descriptive at all, it is more of a python error than something suggestive so you can figure out what to do with kraft. From my point of view, it would be better to suggest to you that kraft doesn't find the executable.

Screenshots

Desktop (please complete the following information):

• OS: Ubuntu

Additional context

[gabrielmocanu]

After creating the pull request I was thinking also of something else.
Why don't kraft build create by default the unikernel executable as the naming convention from kraft.yaml.

So for example:
If we have app-A, after kraft build we will have the unikernel executable app-A_x86-64, even though in the kraft.yaml file we have the application name only 'A'. I think it's better to use only the notations from kraft.yml.
Is there any consideration of using the directory name of the application for unikernel executable name?

[gabrielmocanu]

I create another issue for what I told you before.(#83)
But I think the PR from this issue is still relevant because it basically treats a possible error there.

[xymeng16]

#73 is also related to this issue.

[gabrielmocanu]

@StefanJum

Can this issue be closed since this PR was merged?

[StefanJum]

@StefanJum

Can this issue be closed since this PR was merged?

Yes, I think it should be closed.