warn if apt-key is run unconditionally in maintainerscript

We want to stop hard-depending on gnupg and for this it is essential
that apt-key isn't used in any critical execution path, which
maintainerscript are. Especially as it is likely that these script call
apt-key either only for (potentially now outdated cleanup) or still not
use the much simpler trusted.gpg.d infrastructure.

1 files changed, 34 insertions, 0 deletions

diff --git a/test/integration/test-apt-key-used-in-maintainerscript b/test/integration/test-apt-key-used-in-maintainerscript
new file mode 100755
index 000000000..e5e96963f
--- /dev/null
+++ b/test/integration/test-apt-key-used-in-maintainerscript
@@ -0,0 +1,34 @@
+#!/bin/sh
+set -e
+
+TESTDIR="$(readlink -f "$(dirname "$0")")"
+. "$TESTDIR/framework"
+
+setupenvironment
+configarchitecture 'native'
+configdpkgnoopchroot
+
+buildingpkg() {
+	local PKG="$1"
+	shift
+	setupsimplenativepackage "$PKG" 'native' '1' 'unstable' "$@"
+	BUILDDIR="incoming/${PKG}-1"
+	echo '#!/bin/sh
+apt-key list' > "${BUILDDIR}/debian/postinst"
+	buildpackage "$BUILDDIR" 'unstable' 'main' 'native'
+	rm -rf "$BUILDDIR"
+}
+buildingpkg 'aptkeyuser-nodepends' 'Depends: unrelated'
+buildingpkg 'aptkeyuser-depends' 'Depends: gnupg'
+
+setupaptarchive
+
+insertinstalledpackage 'unrelated' 'native' '1'
+insertinstalledpackage 'gnupg' 'native' '1'
+
+testsuccess apt install aptkeyuser-depends -y
+testfailure grep '^Warning: This will BREAK' rootdir/tmp/testsuccess.output
+
+testsuccess apt install aptkeyuser-nodepends -y
+cp rootdir/tmp/testsuccess.output apt.output
+testsuccess grep '^Warning: This will BREAK' apt.output