Issue with unpacking some tar archives about grootfs HOT 4 CLOSED

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from grootfs.

This is tar seems to generate archives differently in some circumstances.

→ tree bar/
bar/
└── 1
    └── 2
        └── 3
            └── file1

3 directories, 1 file

If you invoke tar with the directory...

→ tar -cf baz.tar bar/ 

Then it contains entries for all the files.

→ tar --list --file=baz.tar
bar/
bar/1/
bar/1/2/
bar/1/2/3/
bar/1/2/3/file1

However, if tar is invoked with the file at the bottom of the tree.

→ tar -cf baz.tar bar/1/2/3/file1 

Then the tar archive list comes out differently.

→ tar --list --file=baz.tar
bar/1/2/3/file1

from grootfs.

hey @cbaines thanks for opening this issue.
could you provide us with the docker image, and also the Dockerfile, you are using (if it is not private of course)? it may help to speed up our reproduction and bring up other possibilities in case the issue is not the archive (although it does look likely).
thanks!

from grootfs.

could you provide us with the docker image, and also the Dockerfile, you are using (if it is not private of course)? it may help to speed up our reproduction and bring up other possibilities in case the issue is not the archive (although it does look likely).
thanks!

No problem, I believe cbaines/govuk-mini-environment-admin:release_2 [1] on Docker Hub contains a layer with the problematic format. This was generated directly with guix pack -f docker (so no Dockerfile involved), then loaded (by running docker load) and then pushed to Docker Hub.

1: https://hub.docker.com/r/cbaines/govuk-mini-environment-admin/tags/
2: https://www.gnu.org/software/guix/manual/html_node/Invoking-guix-pack.html

from grootfs.