[PATCH] buildchroot: Allow downgrades when installing packages

[Jan Kiszka <jan.kiszka@web.de>]

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

This can happen when changing the recipe of a self-built package, and
that already when going from v1.0-rc3 to v1.0.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 meta/classes/image.bbclass                      | 2 +-
 meta/recipes-devtools/buildchroot/files/deps.sh | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass
index 3f4b728..574fb46 100644
--- a/meta/classes/image.bbclass
+++ b/meta/classes/image.bbclass
@@ -209,7 +209,7 @@ do_install_imager_deps() {
             -o Dir::Etc::sourceparts="-" \
             -o APT::Get::List-Cleanup="0"
         apt-get -o Debug::pkgProblemResolver=yes --no-install-recommends -y \
-            --allow-unauthenticated install \
+            --allow-unauthenticated --allow-downgrades install \
             ${IMAGER_INSTALL}'
 }

diff --git a/meta/recipes-devtools/buildchroot/files/deps.sh b/meta/recipes-devtools/buildchroot/files/deps.sh
index 2501f05..1963943 100644
--- a/meta/recipes-devtools/buildchroot/files/deps.sh
+++ b/meta/recipes-devtools/buildchroot/files/deps.sh
@@ -10,7 +10,9 @@ source /isar/common.sh
 # Notes:
 #   1) everything before the -y switch is unchanged from the defaults
 #   2) we add -y to go non-interactive
-install_cmd="apt-get -o Debug::pkgProblemResolver=yes --no-install-recommends -y"
+#   3) downgrades shall be allowed in case a package recipe was changed
+install_cmd="apt-get -o Debug::pkgProblemResolver=yes --no-install-recommends \
+    -y --allow-downgrades"

 # Make sure that we have latest isar-apt content.
 # Options meaning:
--
2.16.4