podman-remote build: COPY flattens hardlinks

[edsantiago]

#10421 has a buglet: when hardlinks span subdirectories, the ones created in the image are flattened into the top level:

$ mkdir mytest;cd mytest
$ mkdir -p subdir/subsubdir
$ touch file1; ln file1 subdir/file2; ln file1 subdir/subsubdir/file3
$ printf "FROM alpine\nCOPY . .\n" >Containerfile
$ ../bin/podman-remote build -t foo .
STEP 1: FROM alpine
STEP 2: COPY . .
STEP 3: COMMIT foo
--> 24108ea85cc
Successfully tagged localhost/foo:latest
24108ea85cc9015a4391575b5821f3e9c35f72f890739ab019216a6a149e93c0
$ ../bin/podman run --rm foo ls -l | grep file
-rw-rw-r--    1 root     root            21 May 24 17:36 Containerfile
-rw-rw-r--    3 root     root             0 May 24 17:36 file1
-rw-rw-r--    3 root     root             0 May 24 17:36 file2    <-- should've been in subdir
-rw-rw-r--    3 root     root             0 May 24 17:36 file3    <-- should've been in subdir/subsubdir

[rhatdan]

Now you are just being evil.... :^)

[edsantiago]

I accept that as a compliment! (side note: bug was found by running buildah-bud tests under podman-remote; so full cleverness credit goes to @nalind for writing a test, bud-copy-dockerignore-hardlinks, that catches the problem)

[rhatdan]

Well I always knew @nalind was evil. I spent a couple of hours doing something that ended up being a simple fix.