[PATCH v7] dpkg: Restore support for replacing pre-installed packages in sbuild-chroot

[Uladzimir Bely <ubely@ilbers.de>]

From: Jan Kiszka <jan.kiszka@siemens.com>

During the migration to sbuild, support for using self-built packages in
the build environment was lost if those were already part of the
sbuild-chroot. This restores it by adding --apt-distupgrade to the
sbuild call. But that is not enough because sbuild will only upgrade
packages from already configured sources, not those specified via
--extra-repository. We therefore have to switch back to configuring
isar-apt during sbuild-chroot creation.

As rootfs_configure_isar_apt configures the isar repo under
/isar-apt, we bind-mount the one in /home/builder/${PN} to that folder.
Another difference is that we now need to run apt-get update explicitly,
but only for isar-apt.

For apt fetching, we neither need nor want isar-apt to be available.
Rebuilding self-generated apt packages is generally pointless as the
needs are better addressed in the generating recipe itself. Exposing
isar-apt to the fetch may furthermore lead to fetching a previously
built source package of the same recipe, rather than pulling the
external version.

And because the sbuild-chroots are now left behind with isar-apt
configured, the configuration in imager_run can be removed (credits to
Srinuvasan Arjunan).

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Uladzimir Bely <ubely@ilbers.de>
---

Changes in v7: Merged v6 with fix disabling isar-apt for do_apt_fetch

 meta/classes/dpkg-base.bbclass                | 37 ++++++++++++-------
 meta/classes/dpkg.bbclass                     |  5 ++-
 meta/classes/image-tools-extension.bbclass    | 13 -------
 .../sbuild-chroot/sbuild-chroot.inc           |  2 -
 4 files changed, 27 insertions(+), 30 deletions(-)

diff --git a/meta/classes/dpkg-base.bbclass b/meta/classes/dpkg-base.bbclass
index 95ca3db8..86466b57 100644
--- a/meta/classes/dpkg-base.bbclass
+++ b/meta/classes/dpkg-base.bbclass
@@ -19,8 +19,6 @@ DEPENDS:append:riscv64 = "${@' crossbuild-essential-riscv64' if d.getVar('ISAR_C
 DEB_BUILD_PROFILES ?= ""
 DEB_BUILD_OPTIONS ?= ""
 
-ISAR_APT_REPO ?= "deb [trusted=yes] file:///home/builder/${PN}/isar-apt/${DISTRO}-${DISTRO_ARCH}/apt/${DISTRO} ${DEBDISTRONAME} main"
-
 python do_adjust_git() {
     import subprocess
 
@@ -109,16 +107,24 @@ do_apt_fetch() {
     E="${@ isar_export_proxies(d)}"
     schroot_create_configs
 
+    session_id=$(schroot -q -b -c ${SBUILD_CHROOT})
+    echo "Started session: ${session_id}"
+
     schroot_cleanup() {
+        schroot -q -f -e -c ${session_id} > /dev/null 2>&1
         schroot_delete_configs
     }
     trap 'exit 1' INT HUP QUIT TERM ALRM USR1
     trap 'schroot_cleanup' EXIT
 
+    schroot -r -c ${session_id} -d / -u root -- \
+        rm /etc/apt/sources.list.d/isar-apt.list /etc/apt/preferences.d/isar-apt
     for uri in "${SRC_APT}"; do
-        schroot -d / -c ${SBUILD_CHROOT} -- \
+        schroot -r -c ${session_id} -d / -- \
             sh -c 'mkdir -p /downloads/deb-src/"$1"/"$2" && cd /downloads/deb-src/"$1"/"$2" && apt-get -y --download-only --only-source source "$2"' my_script "${BASE_DISTRO}-${BASE_DISTRO_CODENAME}" "${uri}"
     done
+
+    schroot -e -c ${session_id}
     schroot_delete_configs
 }
 
@@ -221,8 +227,17 @@ def isar_export_build_settings(d):
     os.environ['DEB_BUILD_OPTIONS']  = isar_deb_build_options(d)
     os.environ['DEB_BUILD_PROFILES'] = isar_deb_build_profiles(d)
 
+dpkg_schroot_create_configs() {
+    schroot_create_configs
+    sudo -s <<'EOSUDO'
+        sbuild_fstab="${SBUILD_CONF_DIR}/fstab"
+        fstab_isarapt="${WORKDIR}/isar-apt/${DISTRO}-${DISTRO_ARCH}/apt/${DISTRO} /isar-apt none rw,bind 0 0"
+        grep -qxF "${fstab_isarapt}" ${sbuild_fstab} || echo "${fstab_isarapt}" >> ${sbuild_fstab}
+EOSUDO
+}
+
 python do_dpkg_build() {
-    bb.build.exec_func('schroot_create_configs', d)
+    bb.build.exec_func('dpkg_schroot_create_configs', d)
     try:
         bb.build.exec_func("dpkg_runbuild", d)
     finally:
@@ -288,7 +303,7 @@ do_deploy_deb[lockfiles] = "${REPO_ISAR_DIR}/isar.lock"
 do_deploy_deb[dirs] = "${S}"
 
 python do_devshell() {
-    bb.build.exec_func('schroot_create_configs', d)
+    bb.build.exec_func('dpkg_schroot_create_configs', d)
 
     isar_export_proxies(d)
     isar_export_ccache(d)
@@ -297,11 +312,9 @@ python do_devshell() {
         bb.build.exec_func('schroot_configure_ccache', d)
 
     schroot = d.getVar('SBUILD_CHROOT')
-    isar_apt = d.getVar('ISAR_APT_REPO')
     pkg_arch = d.getVar('PACKAGE_ARCH')
     build_arch = d.getVar('BUILD_ARCH')
     pp_pps = os.path.join(d.getVar('PP'), d.getVar('PPS'))
-    debdistroname = d.getVar('DEBDISTRONAME')
 
     install_deps = ":" if d.getVar('BB_CURRENTTASK') == "devshell_nodeps" else f"mk-build-deps -i \
         --host-arch {pkg_arch} --build-arch {build_arch}  \
@@ -310,15 +323,13 @@ python do_devshell() {
 
     termcmd = "schroot -d / -c {0} -u root -- sh -c ' \
         cd {1}; \
-        echo {2} > /etc/apt/sources.list.d/isar_apt.list; \
-        echo \"Package: *\nPin: release n={3}\nPin-Priority: 1000\" > /etc/apt/preferences.d/isar-apt; \
-        echo \"APT::Get::allow-downgrades 1;\" > /etc/apt/apt.conf.d/50isar-apt; \
-        apt-get -y -q update; \
-        {4}; \
+        apt-get -y -q update -o Dir::Etc::SourceList=\"sources.list.d/isar-apt.list\" -o Dir::Etc::SourceParts=\"-\" -o APT::Get::List-Cleanup=\"0\"; \
+        apt-get -y upgrade; \
+        {2}; \
         export PATH=$PATH_PREPEND:$PATH; \
         $SHELL -i \
     '"
-    oe_terminal(termcmd.format(schroot, pp_pps, isar_apt, debdistroname, install_deps), "Isar devshell", d)
+    oe_terminal(termcmd.format(schroot, pp_pps, install_deps), "Isar devshell", d)
 
     bb.build.exec_func('schroot_delete_configs', d)
 }
diff --git a/meta/classes/dpkg.bbclass b/meta/classes/dpkg.bbclass
index c699a84d..d1666f78 100644
--- a/meta/classes/dpkg.bbclass
+++ b/meta/classes/dpkg.bbclass
@@ -110,16 +110,17 @@ dpkg_runbuild() {
     DEB_SOURCE_NAME=$(dpkg-parsechangelog --show-field Source --file ${WORKDIR}/${PPS}/debian/changelog)
     DSC_FILE=$(find ${WORKDIR} -name "${DEB_SOURCE_NAME}*.dsc" -maxdepth 1 -print)
 
-    sbuild -A -n -c ${SBUILD_CHROOT} --extra-repository="${ISAR_APT_REPO}" \
+    sbuild -A -n -c ${SBUILD_CHROOT} \
         --host=${PACKAGE_ARCH} --build=${BUILD_ARCH} ${profiles} \
         --no-run-lintian --no-run-piuparts --no-run-autopkgtest --resolve-alternatives \
         --bd-uninstallable-explainer=apt \
-        --no-apt-update \
+        --no-apt-update --apt-distupgrade \
         --chroot-setup-commands="echo \"Package: *\nPin: release n=${DEBDISTRONAME}\nPin-Priority: 1000\" > /etc/apt/preferences.d/isar-apt" \
         --chroot-setup-commands="echo \"APT::Get::allow-downgrades 1;\" > /etc/apt/apt.conf.d/50isar-apt" \
         --chroot-setup-commands="rm -f /var/log/dpkg.log" \
         --chroot-setup-commands="mkdir -p ${deb_dir}" \
         --chroot-setup-commands="ln -sf ${ext_deb_dir}/*.deb -t ${deb_dir}/" \
+        --chroot-setup-commands="apt-get update -o Dir::Etc::SourceList=\"sources.list.d/isar-apt.list\" -o Dir::Etc::SourceParts=\"-\" -o APT::Get::List-Cleanup=\"0\"" \
         --finished-build-commands="rm -f ${deb_dir}/sbuild-build-depends-main-dummy_*.deb" \
         --finished-build-commands="[ -z \"\$(find ${deb_dir} -maxdepth 1 -name '*.deb' -print -quit)\" ] || cp ${CP_FLAGS} ${deb_dir}/*.deb -t ${ext_deb_dir}/" \
         --finished-build-commands="cp /var/log/dpkg.log ${ext_root}/dpkg_partial.log" \
diff --git a/meta/classes/image-tools-extension.bbclass b/meta/classes/image-tools-extension.bbclass
index 58799fcf..46bdf78b 100644
--- a/meta/classes/image-tools-extension.bbclass
+++ b/meta/classes/image-tools-extension.bbclass
@@ -44,19 +44,6 @@ imager_run() {
             distro="${HOST_BASE_DISTRO}-${BASE_DISTRO_CODENAME}"
         fi
 
-        # prepare isar-apt
-        schroot -r -c ${session_id} -d / -u root -- sh -c " \
-            mkdir -p '/etc/apt/sources.list.d'
-            echo 'deb [trusted=yes] file:///isar-apt ${DEBDISTRONAME} main' > \
-                '/etc/apt/sources.list.d/isar-apt.list'
-
-            mkdir -p '/etc/apt/preferences.d'
-            cat << EOF > '/etc/apt/preferences.d/isar-apt'
-Package: *
-Pin: release n=${DEBDISTRONAME}
-Pin-Priority: 1000
-EOF"
-
         E="${@ isar_export_proxies(d)}"
         deb_dl_dir_import ${schroot_dir} ${distro}
         schroot -r -c ${session_id} -d / -u root -- sh -c " \
diff --git a/meta/recipes-devtools/sbuild-chroot/sbuild-chroot.inc b/meta/recipes-devtools/sbuild-chroot/sbuild-chroot.inc
index 39ced80b..2f07de82 100644
--- a/meta/recipes-devtools/sbuild-chroot/sbuild-chroot.inc
+++ b/meta/recipes-devtools/sbuild-chroot/sbuild-chroot.inc
@@ -56,8 +56,6 @@ SBUILD_CHROOT_DIR = "${WORKDIR}/rootfs"
 ROOTFSDIR = "${SBUILD_CHROOT_DIR}"
 ROOTFS_PACKAGES = "${SBUILD_CHROOT_PREINSTALL}"
 
-# We don't need /etc/apt/sources.list.d/isar-apt.list' while it's handled by sbuild
-ROOTFS_CONFIGURE_COMMAND:remove = "rootfs_configure_isar_apt"
 ROOTFS_POSTPROCESS_COMMAND:remove = "rootfs_cleanup_isar_apt"
 
 # Do not cleanup base-apt
-- 
2.20.1