updated launcher + autoupdate

update.sh

@@ -2,7 +2,7 @@
 set -euo pipefail
 
 BASE_URL="${BASE_URL:-https://git.jewguard.xyz/linusware/main/raw/branch/main}"
-INSTALL_DIR="${HOME}/linusware"
+INSTALL_DIR="${LINUSWARE_DIR:-${HOME}/linusware}"
 
 RED='\033[0;31m'
 GREEN='\033[0;32m'
@@ -35,7 +35,7 @@ update_edition() {
   local run_path="${INSTALL_DIR}/${edition}/linusware/run.sh"
   local ver_file="${INSTALL_DIR}/${edition}/version.txt"
 
-  [ -f "$run_path" ] || return
+  [ -f "$run_path" ] || return 0
 
   local cur_ver=""
   [ -f "$ver_file" ] && cur_ver=$(cat "$ver_file")
@@ -107,5 +107,51 @@ for dir in "${INSTALL_DIR}"/*/; do
   update_edition "$(basename "$dir")"
 done
 
+# --- self-update ---
+self_update() {
+  local script="$1"
+  local url="${BASE_URL}/${script}"
+  local cache="${INSTALL_DIR}/.scripts"
+
+  local remote_id
+  case "$url" in
+    file://*)
+      local filepath="${url#file://}"
+      remote_id=$(stat -c %Y "$filepath" 2>/dev/null) || return 0
+      ;;
+    *)
+      local headers; headers=$(curl -fsSL -I "$url" 2>/dev/null) || return 0
+      remote_id=$(echo "$headers" | grep -im1 '^etag:' | tr -d '\r') || true
+      remote_id="${remote_id#*: }"
+      if [ -z "$remote_id" ]; then
+        remote_id=$(echo "$headers" | grep -im1 '^last-modified:' | tr -d '\r') || true
+        remote_id="${remote_id#*: }"
+      fi
+      [ -n "$remote_id" ] || return 0
+      ;;
+  esac
+
+  local local_id
+  local_id=$(grep -F "$script " "$cache" 2>/dev/null | head -1 | cut -d' ' -f2-) || true
+
+  [ "$remote_id" = "$local_id" ] && { info "${script}: up-to-date"; return; }
+
+  info "${script}: updating..."
+  local tmp; tmp="$(mktemp)"
+  curl -fsSL -o "$tmp" "$url" || { rm -f "$tmp"; warn "${script}: download failed"; return; }
+  chmod +x "$tmp"
+  mv "$tmp" "${INSTALL_DIR}/${script}"
+
+  local tmp_cache; tmp_cache="$(mktemp)"
+  grep -vF "$script " "$cache" 2>/dev/null > "$tmp_cache" || true
+  echo "$script $remote_id" >> "$tmp_cache"
+  mv "$tmp_cache" "$cache"
+
+  info "${script}: updated"
+}
+
+self_update "launcher.sh"
+self_update "update.sh"
+
 echo ""
 info "Done."