Provide option to apply Cleanroom to any Forge-like server type (#4338)

scripts/start-applyCleanroom

@@ -0,0 +1,48 @@
+#!/bin/bash
+
+: "${CLEANROOM_FORCE_REINSTALL:=false}"
+
+# shellcheck source=start-utils
+. "${SCRIPTS:-$(dirname "$0")}/start-utils"
+isDebugging && set -x
+resultsFile=/data/.run-cleanroom.env
+
+declare -a cleanroom_installer_options
+cleanroom_installer_options+=(--output-directory=/data)
+cleanroom_installer_options+=(--results-file="${resultsFile}")
+cleanroom_installer_options+=(--force-reinstall="${CLEANROOM_FORCE_REINSTALL}")
+
+if [[ ${CLEANROOM_LOADER_VERSION} ]]; then
+  cleanroom_installer_options+=(--loader-version="${CLEANROOM_LOADER_VERSION}")
+fi
+
+if [[ ${CLEANROOM_INSTALLER_VERSION} ]]; then
+  cleanroom_installer_options+=(--installer-version="${CLEANROOM_INSTALLER_VERSION}")
+fi
+
+if [[ ${CLEANROOM_FROM_FILE} ]]; then
+  cleanroom_installer_options+=(--from-local-file="${CLEANROOM_FROM_FILE}")
+fi
+
+if [[ ${CLEANROOM_FROM_URL} ]]; then
+  cleanroom_installer_options+=(--from-url="${CLEANROOM_FROM_URL}")
+fi
+
+if [[ ${CLEANROOM_MAVEN_URL} ]]; then
+  cleanroom_installer_options+=(--cleanroom-maven-url="${CLEANROOM_MAVEN_URL}")
+fi
+
+if ! mc-image-helper install-cleanroom "${cleanroom_installer_options[@]}" ; then
+    if [[ ${CLEANROOM_FROM_FILE} ]]; then
+      logError "Failed to install Cleanroom given installer ${CLEANROOM_FROM_FILE}"
+    elif [[ ${CLEANROOM_FROM_URL:-} ]]; then
+      logError "Failed to install Cleanroom from ${CLEANROOM_FROM_URL}"
+    else
+      logError "Failed to install Cleanroom"
+    fi
+    exit 1
+fi
+
+applyResultsFile ${resultsFile}
+
+export FAMILY=FORGE