Merge "apt: Add allow-downgrades option per package"

divingbell/templates/bin/_apt.sh.tpl

@@ -106,7 +106,7 @@ dpkg --configure -a
 {{- $pkg_name := .name }}
 if [[ "${CURRENT_PACKAGES[{{ .name | squote }}]+isset}" != "isset"{{- if .version }} || "${CURRENT_PACKAGES[{{ .name | squote }}]}" != {{ .version }}{{- end }} ]]; then
     # Run this in case some package installation was interrupted
-    DEBIAN_FRONTEND=noninteractive apt-get install -y -o Dpkg::Options::=--force-confdef -o Dpkg::Options::=--force-confold{{- if .repo }} -t {{ .repo }}{{ end }} {{ .name -}} {{- if .version }}={{ .version }}{{ end }}
+    DEBIAN_FRONTEND=noninteractive apt-get install -y -o Dpkg::Options::=--force-confdef -o Dpkg::Options::=--force-confold {{- if .allow_downgrade }} "--allow-downgrades" {{ end }}{{- if .repo }} -t {{ .repo }}{{ end }} {{ .name -}} {{- if .version }}={{ .version }}{{ end }}
     INSTALLED_THIS_TIME="$INSTALLED_THIS_TIME {{ .name }}"
 fi
 REQUESTED_PACKAGES="$REQUESTED_PACKAGES {{ .name }}"

doc/source/index.rst

@@ -121,6 +121,7 @@ Here is an example configuration for it::
         packages:
         - name: <PACKAGE1>
           version: <VERSION1>
+          allow_downgrade: true
         - name: <PACKAGE2>
 
 There is a possibility to blacklist packages, e.g. ``telnetd`` and ``nis``::

tools/gate/scripts/020-test-divingbell.sh

@@ -1208,6 +1208,7 @@ test_apt(){
     packages:
     - name: $APT_PACKAGE1
       version: $APT_VERSION1
+      allow_downgrade: true
     - name: $APT_PACKAGE2" > "${overrides_yaml}"
   install_base "--values=${overrides_yaml}"
   get_container_status apt