just-in-time removal of broken essential packages

We deal with Conflicts in SmartUnpack in pretty much the same way, but
Breaks weren't handled in SmartConfigure so that the remove was sheduled
after the configuration of the package breaking the to-be-removed.

Closes: 796070

2 files changed, 25 insertions, 2 deletions

diff --git a/test/integration/test-bug-796070-downgrade-realpkg b/test/integration/test-bug-796070-downgrade-realpkg
new file mode 100755
index 000000000..3ad4fda3e
--- /dev/null
+++ b/test/integration/test-bug-796070-downgrade-realpkg
@@ -0,0 +1,23 @@
+#!/bin/sh
+set -e
+
+TESTDIR=$(readlink -f $(dirname $0))
+. $TESTDIR/framework
+
+setupenvironment
+configarchitecture 'i386'
+
+buildsimplenativepackage 'apt' 'all' '1.0.10.1' 'stable' 'Depends: libapt-pkg4.16 (>= 1.0.10.1)'
+buildsimplenativepackage 'libapt-pkg4.16' 'all' '1.0.10.1' 'stable' 'Breaks: apt (<< 0.9.4~), libapt-inst1.5 (<< 0.9.9~)'
+buildsimplenativepackage 'libapt-pkg5.0' 'all' '1.1~exp9'  'unstable' 'Breaks: apt (<< 1.1~exp4), libapt-inst1.5 (<< 0.9.9~)'
+buildsimplenativepackage 'apt' 'all' '1.1~exp9' 'unstable' 'Depends: libapt-pkg5.0'
+
+setupaptarchive
+
+# Check with the APT name, aka essential
+testsuccess aptget install apt -t stable -y
+testsuccess aptget dist-upgrade -y
+
+testsuccess aptget install apt/stable -y --allow-downgrades -o Debug::pkgPackageManager=1 #-o Debug::pkgDpkgPM=1
+testdpkginstalled apt libapt-pkg4.16
+testdpkgnotinstalled libapt-pkg5.0
diff --git a/test/integration/skip-bug-796070-downgrade b/test/integration/test-bug-796070-downgrade-simulate
index a435cfbf1..0b4817d39 100755
--- a/test/integration/skip-bug-796070-downgrade
+++ b/test/integration/test-bug-796070-downgrade-simulate
@@ -49,8 +49,8 @@ The following packages will be REMOVED:
 The following packages will be DOWNGRADED:
   eapt
 0 upgraded, 0 newly installed, 1 downgraded, 1 to remove and 0 not upgraded.
+Inst eapt [1.1~exp9] (1.0.10.1 unstable [all]) [elibapt-pkg5.0:i386 on eapt:i386] [elibapt-pkg5.0:i386 ]
 Remv elibapt-pkg5.0 [1.1~exp9]
-Inst eapt [1.1~exp9] (1.0.10.1 unstable [all])
 Conf eapt (1.0.10.1 unstable [all])' apt install -s eapt=1.0.10.1
 
 
@@ -62,6 +62,6 @@ The following packages will be REMOVED:
 The following packages will be DOWNGRADED:
   apt
 0 upgraded, 0 newly installed, 1 downgraded, 1 to remove and 0 not upgraded.
+Inst apt [1.1~exp9] (1.0.10.1 unstable [all]) [libapt-pkg5.0:i386 on apt:i386] [libapt-pkg5.0:i386 ]
 Remv libapt-pkg5.0 [1.1~exp9]
-Inst apt [1.1~exp9] (1.0.10.1 unstable [all])
 Conf apt (1.0.10.1 unstable [all])' apt install -s apt=1.0.10.1