Exclude ubuntu:bionic from the set of testing images supported as it …

…no longer exists at images.linuxcontainers.org. (#115)

.github/workflows/pkg-rust.yml

@@ -26,8 +26,8 @@
 #
 # DEB/RPM testing:
 # ================
-# DEB and RPM packages are tested inside LXC/LXD containers because Docker containers don't by default support init
-# managers such as systemd but we want to test systemd service unit installation and activation.
+# DEB and RPM packages are tested inside LXC/LXD (now Incus) containers because Docker containers don't by default
+# support init managers such as systemd but we want to test systemd service unit installation and activation.
 #
 # RHEL 8/CentOS 8 support:
 # ========================
@@ -426,7 +426,18 @@ jobs:
             MODIFIED_JSON=$(echo ${PACKAGE_TEST_RULES_PROCESSED_JSON} | jq -c 'del(.image[]? | select(. == "debian:stretch")) | del(.include[]? | select(.image == "debian:stretch"))')
             MODIFIED_JSON=$(echo ${MODIFIED_JSON} | jq -c 'del(.include[]? | select(.os == "debian:stretch"))')
             if [[ "${CONTROL_JSON}" != "${MODIFIED_JSON}" ]]; then
-              echo "::warning::Removed debian:stretch image from package_test_rules because the LXC image no longer exists"
+              echo "::warning::Removed debian:stretch image from package_test_rules because the LXC/Incus image no longer exists"
+              PACKAGE_TEST_RULES_PROCESSED_JSON="${MODIFIED_JSON}"
+            fi
+          fi
+
+          # Exclude ubuntu:bionic because the LXC image is no longer available.
+          if [[ "${PACKAGE_TEST_RULES_PROCESSED_JSON}" != "{}" ]]; then
+            CONTROL_JSON=$(echo ${PACKAGE_TEST_RULES_PROCESSED_JSON} | jq -c)
+            MODIFIED_JSON=$(echo ${PACKAGE_TEST_RULES_PROCESSED_JSON} | jq -c 'del(.image[]? | select(. == "ubuntu:bionic")) | del(.include[]? | select(.image == "debian:stretch"))')
+            MODIFIED_JSON=$(echo ${MODIFIED_JSON} | jq -c 'del(.include[]? | select(.os == "ubuntu:bionic"))')
+            if [[ "${CONTROL_JSON}" != "${MODIFIED_JSON}" ]]; then
+              echo "::warning::Removed ubuntu:bionic image from package_test_rules because the LXC/Incus image no longer exists"
               PACKAGE_TEST_RULES_PROCESSED_JSON="${MODIFIED_JSON}"
             fi
           fi