jobqueue: Introduce jobqueue backed by a postgres database

Co-authored-by: sanne <sanne.raymaekers@gmail.com>

test/cases/base_tests.sh

@@ -14,6 +14,7 @@ TEST_CASES=(
   "osbuild-dnf-json-tests"
   "osbuild-composer-cli-tests"
   "osbuild-auth-tests"
+  "osbuild-composer-dbjobqueue-tests"
 )
 
 # Print out a nice test divider so we know when tests stop and start.
@@ -43,6 +44,27 @@ run_test_case () {
 # Provision the software under test.
 /usr/libexec/osbuild-composer-test/provision.sh
 
+# Set up a basic postgres db
+sudo dnf install -y go postgresql postgresql-server postgresql-contrib
+PWFILE=$(sudo -u postgres mktemp)
+cat <<EOF | sudo -u postgres tee "$PWFILE"
+foobar
+EOF
+PGSETUP_INITDB_OPTIONS="-A password -U postgres --pwfile=$PWFILE" \
+    sudo -E postgresql-setup --initdb --unit postgresql
+sudo systemctl start postgresql
+PGUSER=postgres PGPASSWORD=foobar PGHOST=localhost PGPORT=5432 \
+    sudo -E -u postgres psql -c "CREATE DATABASE osbuildcomposer;"
+
+# Initialize a module in a temp dir so we can get tern without introducing
+# vendoring inconsistency
+pushd "$(mktemp -d)"
+go mod init temp
+go get github.com/jackc/tern
+PGUSER=postgres PGPASSWORD=foobar PGDATABASE=osbuildcomposer PGHOST=localhost PGPORT=5432 \
+      go run github.com/jackc/tern migrate -m /usr/share/tests/osbuild-composer/schemas
+popd
+
 # Change to the working directory.
 cd $WORKING_DIRECTORY