[PATCH v5] meta/classes: generate bill of material from image

["Q. Gylstorff" <Quirin.Gylstorff@siemens.com>]

From: Quirin Gylstorff <quirin.gylstorff@siemens.com>

To create products it is necessary to have a list
of used packages for clearance and to security monitoring.
To get a simple list of packages use dpkg-query and generate
a list with the following pattern:

source name| source version | binary package name | binary version

All rootfs generate the list by default. Currently the f
following lists are generated:
- buildchroot-${DISTRO}-${ARCH}.manifest
- ${IMAGE}-${DISTRO}-${ARCH}.manifest
- optional: sdkchroot-${DISTRO}-${ARCH}.manifest

Remove the feature with:
ROOTFS_FEATURES_remove = "generate-manifest"

Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
---
 meta/classes/image.bbclass  |  2 +-
 meta/classes/rootfs.bbclass | 12 +++++++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass
index ec6bd39..70c46d2 100644
--- a/meta/classes/image.bbclass
+++ b/meta/classes/image.bbclass
@@ -58,7 +58,7 @@ image_do_mounts() {
 }
 
 ROOTFSDIR = "${IMAGE_ROOTFS}"
-ROOTFS_FEATURES += "copy-package-cache clean-package-cache finalize-rootfs"
+ROOTFS_FEATURES += "copy-package-cache clean-package-cache finalize-rootfs generate-manifest"
 ROOTFS_PACKAGES += "${IMAGE_PREINSTALL} ${IMAGE_INSTALL}"
 
 inherit rootfs
diff --git a/meta/classes/rootfs.bbclass b/meta/classes/rootfs.bbclass
index c7e0435..59edcde 100644
--- a/meta/classes/rootfs.bbclass
+++ b/meta/classes/rootfs.bbclass
@@ -10,7 +10,8 @@ ROOTFS_PACKAGES ?= ""
 # 'deploy-package-cache' - copy the package cache ${WORKDIR}/apt_cache
 # 'clean-package-cache' - delete package cache from rootfs
 # 'finalize-rootfs' - delete files needed to chroot into the rootfs
-ROOTFS_FEATURES ?= ""
+# 'generate-manifest' - generate a package manifest of the rootfs into ${IMAGE_DEPLOY_DIR}
+ROOTFS_FEATURES ?= "generate-manifest"
 
 ROOTFS_APT_ARGS="install --yes -o Debug::pkgProblemResolver=yes"
 
@@ -212,6 +213,15 @@ rootfs_postprocess_finalize() {
 EOSUDO
 }
 
+ROOTFS_POSTPROCESS_COMMAND += "${@bb.utils.contains('ROOTFS_FEATURES', 'generate-manifest', 'rootfs_generate_manifest', '', d)}"
+rootfs_generate_manifest () {
+    mkdir -p ${DEPLOY_DIR_IMAGE}
+    sudo -E chroot '${ROOTFSDIR}' \
+    dpkg-query \
+    -f '${source:Package}|${source:Version}|${binary:Package}|${Version}\n' -W > \
+    ${DEPLOY_DIR_IMAGE}/"${PF}".manifest
+}
+
 do_rootfs_postprocess[vardeps] = "${ROOTFS_POSTPROCESS_COMMAND}"
 python do_rootfs_postprocess() {
     # Take care that its correctly mounted:
-- 
2.20.1