Add modmanager hooks, fix indents

.editorconfig

@@ -15,6 +15,6 @@ trim_trailing_whitespace = false
 indent_style = space
 indent_size = 2
 
-[{**.sh,root/etc/cont-init.d/**,root/etc/services.d/**}]
+[{docker-mods.*}]
 indent_style = space
 indent_size = 4

docker-mods.v3

@@ -353,9 +353,9 @@ run_mods() {
             MOD_OFFLINE="true"
         else
             # Determine first and only layer of image
-            SHALAYER=$(get_blob_sha "${TOKEN}" "${MANIFEST_URL}" "${TAG}" "${ARCH:=-amd64}")
+            SHALAYER=$(get_blob_sha "${TOKEN}" "${MANIFEST_URL}" "${TAG}" "${ARCH:--amd64}")
             if [[ $? -eq 1 ]]; then
-                write_mod_error "No manifest available for arch ${ARCH:=-amd64}, cannot fetch mod"
+                write_mod_error "No manifest available for arch ${ARCH:--amd64}, cannot fetch mod"
                 continue
             elif [[ -z "${SHALAYER}" ]]; then
                 write_mod_info "${DOCKER_MOD} digest could not be fetched from ${REGISTRY}, checking local cache"
@@ -410,6 +410,7 @@ run_mods() {
             fi
             continue
         fi
+        if [[ -z "${MODMANAGER_MODONLY}" ]]; then
             write_mod_info "Installing ${DOCKER_MOD}"
             mkdir -p /tmp/mod
             tar xzf "/modcache/${FILENAME}.tar.xz" -C /tmp/mod
@@ -425,6 +426,9 @@ run_mods() {
             shopt -u dotglob
             rm -rf /tmp/mod
             echo "${SHALAYER}" >"/${FILENAME}"
+        else
+            write_mod_debug "Modmanager skipping mod application"
+        fi
         if [[ -f "/modcache/${FILENAME}.lock" ]]; then
             rm "/modcache/${FILENAME}.lock" || write_mod_error "Failed to delete lock file /modcache/${FILENAME}.lock"
         fi
@@ -512,6 +516,11 @@ run_branding() {
 }
 
 # Main script loop
+if [[ -n "${MODMANAGER_MODONLY}" ]]; then
+    run_mods
+    exit 0
+fi
+
 if grep -qEe ' / \w+ ro' /proc/mounts; then
     printf '1' > /run/s6/container_environment/LSIO_READ_ONLY_FS
     LSIO_READ_ONLY_FS=1