version/update system: version.sh, --update flag, UPDATE_MODULES, auto-detect existing install

install.sh

@@ -13,9 +13,12 @@ source "$OMERON_ROOT/lib/tui-fs.sh"
 source "$OMERON_ROOT/lib/utils.sh"
 source "$OMERON_ROOT/lib/config.sh"
 source "$OMERON_ROOT/lib/modules.sh"
+source "$OMERON_ROOT/lib/version.sh"
 
 OMERON_FRESH_INSTALL="${OMERON_FRESH_INSTALL:-0}"
 export OMERON_FRESH_INSTALL
+OMERON_UPDATE_MODE="${OMERON_UPDATE_MODE:-0}"
+export OMERON_UPDATE_MODE
 
 DEFAULT_MODULES=(
   "core/preflight"
@@ -40,6 +43,17 @@ FRESH_MODULES=(
   "core/sddm"
 )
 
+UPDATE_MODULES=(
+  "core/packages"
+  "core/ags"
+  "core/dotfiles"
+  "core/services"
+  "homelab/setup"
+  "optional/install"
+  "post/apply-theme"
+  "core/sddm"
+)
+
 RUN_MODULES=()
 SKIP_MODULES=()
 WITH_SDDM=0
@@ -52,6 +66,7 @@ Usage: ./install.sh [OPTIONS]
 
 Options:
   --fresh            Full system setup (Hyprland + GPU drivers + all deps)
+  --update           Update existing installation (skip preflight + GPU setup)
   --modules m1,m2    Run only specific modules (comma-separated)
   --skip m1,m2       Skip specific modules (comma-separated)
   --skip-packages    Skip package installation
@@ -62,6 +77,7 @@ Options:
 Examples:
   ./install.sh                    Interactive (detects fresh install automatically)
   ./install.sh --fresh            Force full setup on a running system
+  ./install.sh --update           Update existing installation
   ./install.sh --modules core/dotfiles,post/apply-theme
   ./install.sh --skip core/packages
 EOF
@@ -85,7 +101,8 @@ list_modules() {
 parse_args() {
   while [[ $# -gt 0 ]]; do
     case "$1" in
-      --fresh) OMERON_FRESH_INSTALL=1; shift ;;
+      --fresh) OMERON_FRESH_INSTALL=1; OMERON_UPDATE_MODE=0; shift ;;
+      --update) OMERON_UPDATE_MODE=1; OMERON_FRESH_INSTALL=0; shift ;;
       --modules) IFS=',' read -ra RUN_MODULES <<< "$2"; shift 2 ;;
       --skip) IFS=',' read -ra SKIP_MODULES <<< "$2"; shift 2 ;;
       --skip-packages) SKIP_MODULES+=("core/packages"); shift ;;
@@ -111,6 +128,11 @@ detect_environment() {
     fi
   fi
 
+  if ((OMERON_UPDATE_MODE)); then
+    tui_fs_show_ok "Update mode — existing installation detected"
+    return
+  fi
+
   if ((!OMERON_FRESH_INSTALL)) && ((${#RUN_MODULES[@]} == 0)); then
     tui_fs_show_msg "Checking for fresh install..."
     if is_fresh_install; then
@@ -142,7 +164,9 @@ collect_modules() {
   fi
 
   local modules=()
-  if ((OMERON_FRESH_INSTALL)); then
+  if ((OMERON_UPDATE_MODE)); then
+    modules=("${UPDATE_MODULES[@]}")
+  elif ((OMERON_FRESH_INSTALL)); then
     modules=("${FRESH_MODULES[@]}")
   else
     modules=("${DEFAULT_MODULES[@]}")
@@ -168,7 +192,9 @@ collect_all_interactive() {
   exec 1>&2
 
   local modules=()
-  if ((OMERON_FRESH_INSTALL)); then
+  if ((OMERON_UPDATE_MODE)); then
+    modules=("${UPDATE_MODULES[@]}")
+  elif ((OMERON_FRESH_INSTALL)); then
     modules=("${FRESH_MODULES[@]}")
   else
     modules=("${DEFAULT_MODULES[@]}")
@@ -233,6 +259,16 @@ main() {
 
   tui_fs_init
 
+  if ((!OMERON_FRESH_INSTALL)) && ((!OMERON_UPDATE_MODE)) && ((${#RUN_MODULES[@]} == 0)); then
+    if version_read; then
+      if tui_fs_ask_update "${OMERON_INSTALL_DATE:-unknown}"; then
+        OMERON_UPDATE_MODE=1
+        export OMERON_UPDATE_MODE
+        tui_fs_show_ok "Update mode activated"
+      fi
+    fi
+  fi
+
   detect_environment
 
   local modules_to_run=()
@@ -285,6 +321,12 @@ main() {
 
   tui_fs_exit
 
+  if ((OMERON_UPDATE_MODE)); then
+    version_update
+  else
+    version_write
+  fi
+
   printf '\n'
   tui_header "O M E R O N  —  Done"
   tui_success "Installation Complete!"
@@ -292,17 +334,24 @@ main() {
   tui_info "Log: ${OMERON_LOG_FILE}"
   printf '\n'
 
-  if ((OMERON_FRESH_INSTALL)); then
+  if ((OMERON_UPDATE_MODE)); then
+    tui_bold "Update complete!"
+    tui_list \
+      "Reload config:   hyprctl reload" \
+      "Re-run updater:  ./install.sh --update"
+  elif ((OMERON_FRESH_INSTALL)); then
     tui_bold "Your system is ready for Hyprland!"
     tui_list \
       "Start Hyprland:  Hyprland" \
       "Or enable SDDM:  sudo systemctl enable --now sddm" \
-      "Reload config:   hyprctl reload"
+      "Reload config:   hyprctl reload" \
+      "Update later:    ./install.sh --update"
   else
     tui_bold "What next?"
     tui_list \
       "Reload config:   hyprctl reload" \
-      "Re-run installer: ./install.sh"
+      "Re-run installer: ./install.sh" \
+      "Update later:    ./install.sh --update"
   fi
   printf '\n'
 

lib/tui-fs.sh

@@ -182,3 +182,30 @@ tui_fs_confirm_start() {
   [[ "$response" =~ ^[yY](es)?$ ]]
   return $?
 }
+
+tui_fs_ask_update() {
+  local date="$1"
+  [[ "$TUI_FS_ACTIVE" -eq 0 ]] && return 1
+
+  tput cup 4 0 2>/dev/null || true
+  tput ed 2>/dev/null || true
+
+  printf '  \033[1;36m┌─\033[0m  \033[1;37mExisting Installation Found\033[0m\n'
+  printf '  \033[1;36m│\033[0m\n'
+  printf '  \033[1;36m│\033[0m  Installed: \033[1;37m%s\033[0m\n' "$date"
+  printf '  \033[1;36m│\033[0m  Update applies new dotfiles, packages and config\n'
+  printf '  \033[1;36m│\033[0m  without re-running GPU/fresh-install setup.\n'
+  printf '  \033[1;36m└─\033[0m\n'
+  printf '\n'
+  printf '  \033[1;36m?\033[0m  Update existing installation? \033[1m[Y/n]\033[0m '
+
+  if ((OMERON_HAS_GUM)); then
+    gum confirm "Update existing installation?"
+    return $?
+  fi
+
+  read -r response
+  response="${response:-Y}"
+  [[ "$response" =~ ^[yY](es)?$ ]]
+  return $?
+}

lib/version.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+
+OMERON_VERSION_DIR="${OMERON_VERSION_DIR:-$HOME/.local/share/omeron}"
+OMERON_VERSION_FILE="$OMERON_VERSION_DIR/version"
+
+version_read() {
+  if [[ -f "$OMERON_VERSION_FILE" ]]; then
+    source "$OMERON_VERSION_FILE"
+    return 0
+  fi
+  return 1
+}
+
+version_write() {
+  mkdir -p "$OMERON_VERSION_DIR"
+  cat > "$OMERON_VERSION_FILE" <<VERSION
+# Omeron Version File
+OMERON_VERSION=1
+OMERON_INSTALL_DATE="$(date '+%Y-%m-%d %H:%M:%S')"
+OMERON_LAST_UPDATE="$(date '+%Y-%m-%d %H:%M:%S')"
+VERSION
+}
+
+version_update() {
+  mkdir -p "$OMERON_VERSION_DIR"
+  if [[ -f "$OMERON_VERSION_FILE" ]]; then
+    local tmp
+    tmp="$(mktemp)"
+    while IFS= read -r line; do
+      case "$line" in
+        OMERON_LAST_UPDATE=*) printf 'OMERON_LAST_UPDATE="%s"\n' "$(date '+%Y-%m-%d %H:%M:%S')" ;;
+        *) printf '%s\n' "$line" ;;
+      esac
+    done < "$OMERON_VERSION_FILE" > "$tmp"
+    mv "$tmp" "$OMERON_VERSION_FILE"
+  else
+    version_write
+  fi
+}

modules/core/packages.sh

@@ -83,7 +83,7 @@ module_main() {
     return 0
   fi
 
-  if ((OMERON_FRESH_INSTALL)); then
+  if ((OMERON_FRESH_INSTALL || OMERON_UPDATE_MODE)); then
     tui_info "Running system update first..."
     sudo_run pacman -Syu --noconfirm 2>&1 | tail -3 || true
   fi