tmt/test/bib-build: Save disk image in /var/output

Signed-off-by: Pragyan Poudyal <pragyanpoudyal41999@gmail.com>

Author: Johan-Liebert1

tmt/tests/booted/test-bib-build.nu

@@ -26,6 +26,8 @@ const BIB_IMAGE = "quay.io/centos-bootc/bootc-image-builder:latest"
 def main [] {
     tap begin "bootc-image-builder qcow2 build test"
 
+    print ">>>>>>>>>>>>>>>>>> the current working directory <<<<<<<<<<<<<<<<<" ($env.PWD)
+
     let td = mktemp -d
     cd $td
 
@@ -87,8 +89,10 @@ DISKEOF
 ' | save Dockerfile
     podman build -t localhost/bootc-bib-test .
 
+    let output_dir = "/var/output"
+
     # Create output directory for bib
-    mkdir output
+    mkdir $output_dir
 
     # Run bootc-image-builder to create a qcow2
     # We use --local to pull from local containers-storage
@@ -97,11 +101,11 @@ DISKEOF
     let bib_image = $BIB_IMAGE
     # Note: we disable SELinux labeling since we're running in a test VM
     # and use unconfined_t to avoid permission issues
-    podman run --rm --privileged -v /var/lib/containers/storage:/var/lib/containers/storage --security-opt label=type:unconfined_t -v ./output:/output $bib_image --type qcow2 --rootfs xfs localhost/bootc-bib-test
+    podman run --rm --privileged -v /var/lib/containers/storage:/var/lib/containers/storage --security-opt label=type:unconfined_t -v $"($output_dir):/output" $bib_image --type qcow2 --rootfs xfs localhost/bootc-bib-test
 
     # Verify output was created
     print "=== Verifying output ==="
-    let disk_path = "output/qcow2/disk.qcow2"
+    let disk_path = $"($output_dir)/qcow2/disk.qcow2"
     assert ($disk_path | path exists) $"Expected disk image at ($disk_path)"
 
     # Check the disk has reasonable virtual size (at least 4GB as per disk.yaml)