feat: add various system and theme icons, configuration files, and support assets

squashfs-root/usr/sbin/update-icon-caches

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+case "$1" in
+    ""|-h|--help)
+        echo "Usage: $0 directory [ ... ]"
+        exit 1
+        ;;
+esac
+
+for dir in "$@"; do
+    if [ ! -d "$dir" ]; then
+        continue
+    fi
+    if [ -f "$dir"/index.theme ]; then
+        # Generate or regenerate the cache    
+        if ! gtk-update-icon-cache --force --quiet "$dir"; then
+            echo "WARNING: icon cache generation failed for $dir"
+        fi
+    else
+        # No more index.theme, remove the cache if it exists
+        rm -f "$dir"/icon-theme.cache
+        rmdir -p --ignore-fail-on-non-empty "$dir"
+    fi
+done
+
+exit 0