rootfs_*.bbclass: add some helper functions

This patch adds the following helper functions:
 * delayed_postinsts - outputs the list of delayed postinstalls;
 * save_postinsts - this will save the delayed postinstalls for ipk/deb
   in /etc/(ipk|deb)_postinsts;
 * rootfs_remove_packages - removes packages from an image;

Additionaly, this patch will remove a piece of code in
rootfs_ipk_do_rootfs which will be moved to image.bbclass and used for
all backends;

[YOCTO #4484]

(From OE-Core rev: 928df79cd3964f775c4c6e4283ef84b8882f9328)

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 21 insertions, 2 deletions

diff --git a/meta/classes/rootfs_deb.bbclass b/meta/classes/rootfs_deb.bbclass
index e642cf3852..edd1037f87 100644
--- a/meta/classes/rootfs_deb.bbclass
+++ b/meta/classes/rootfs_deb.bbclass
@@ -85,7 +85,7 @@ fakeroot rootfs_deb_do_rootfs () {
         ${ROOTFS_POSTPROCESS_COMMAND}
 
         if ${@base_contains("IMAGE_FEATURES", "read-only-rootfs", "true", "false" ,d)}; then
-                if grep Status:.install.ok.unpacked ${IMAGE_ROOTFS}/var/lib/dpkg/status; then
+                if [ -n "$(delayed_postinsts)" ]; then
                         bberror "Some packages could not be configured offline and rootfs is read-only."
                         exit 1
                 fi
@@ -94,9 +94,22 @@ fakeroot rootfs_deb_do_rootfs () {
         log_check rootfs
 }
 
+rootfs_deb_do_rootfs[vardeps] += "delayed_postinsts"
+
+delayed_postinsts () {
+        cat ${IMAGE_ROOTFS}/var/lib/dpkg/status|grep -e "^Package:" -e "^Status:"|sed -ne 'N;s/Package: \(.*\)\nStatus:.*unpacked/\1/p'
+}
+
+save_postinsts () {
+        for p in $(delayed_postinsts); do
+                install -d ${IMAGE_ROOTFS}${sysconfdir}/deb-postinsts
+                cp ${IMAGE_ROOTFS}/var/lib/dpkg/info/$p.postinst ${IMAGE_ROOTFS}${sysconfdir}/deb-postinsts/$p
+        done
+}
+
 remove_packaging_data_files() {
         rm -rf ${IMAGE_ROOTFS}${opkglibdir}
-        rm -rf ${IMAGE_ROOTFS}/usr/dpkg/
+        rm -rf ${IMAGE_ROOTFS}/var/lib/dpkg/
 }
 
 rootfs_install_packages() {
@@ -105,3 +118,9 @@ rootfs_install_packages() {
         # Mark all packages installed
         sed -i -e "s/Status: install ok unpacked/Status: install ok installed/;" $INSTALL_ROOTFS_DEB/var/lib/dpkg/status
 }
+
+rootfs_remove_packages() {
+        # for some reason, --root doesn't really work here... We use --admindir&--instdir instead.
+        ${STAGING_BINDIR_NATIVE}/dpkg --admindir=${IMAGE_ROOTFS}/var/lib/dpkg --instdir=${IMAGE_ROOTFS} -r --force-depends $@
+}
+