[PATCH v4 2/2] rootfs sbom: directly use captured apt state without extraction

["'Felix Moessbauer' via isar-users" <isar-users@googlegroups.com>]

Since version 0.10 debsbom is capable of reading the apt state from a
tarball instead of an extracted rootfs. By that, we can remove the
manual extraction of the apt state and instead directly pass the tarball
to debsbom.

Signed-off-by: Felix Moessbauer <felix.moessbauer@siemens.com>
---
 meta/classes/sbom.bbclass | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/meta/classes/sbom.bbclass b/meta/classes/sbom.bbclass
index b2e8aff6..dad8e8f6 100644
--- a/meta/classes/sbom.bbclass
+++ b/meta/classes/sbom.bbclass
@@ -51,20 +51,17 @@ EOF
 }
 
 generate_sbom() {
-    run_privileged_heredoc <<'EOF'
-        mkdir -p ${SBOM_CHROOT_LOCAL}/mnt/rootfs \
-                 ${SBOM_CHROOT_LOCAL}/mnt/deploy-dir
-        tar -xf ${WORKDIR}/${ROOTFS_APT_STATE} --zstd \
-            -C ${SBOM_CHROOT_LOCAL}/mnt/rootfs
-EOF
+    run_privileged \
+        mkdir -p ${SBOM_CHROOT_LOCAL}/mnt/deploy-dir
 
     TIMESTAMP=$(date --iso-8601=s -d @${SOURCE_DATE_EPOCH})
+    unzstd < ${WORKDIR}/${ROOTFS_APT_STATE} | \
     bwrap \
         --unshare-user \
         --unshare-pid \
         --bind ${SBOM_CHROOT_LOCAL} / \
         --bind ${SBOM_LOCAL_DEPLOYDIR} /mnt/deploy-dir \
-        -- debsbom -v generate ${SBOM_DEBSBOM_TYPE_ARGS} -r /mnt/rootfs -o /mnt/deploy-dir/'${ROOTFS_PACKAGE_SUFFIX}' \
+        -- debsbom -v generate ${SBOM_DEBSBOM_TYPE_ARGS} -r - -o /mnt/deploy-dir/'${ROOTFS_PACKAGE_SUFFIX}' \
             --distro-name '${SBOM_DISTRO_NAME}' --distro-supplier '${SBOM_DISTRO_SUPPLIER}' \
             --distro-version '${SBOM_DISTRO_VERSION}' --distro-arch '${DISTRO_ARCH}' \
             --base-distro-vendor '${SBOM_BASE_DISTRO_VENDOR}' \
-- 
2.55.0

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