refactor(install): improve modular architecture and error handling

- Remove redundant installation checks in arduino.sh, git.sh
- Add bash shell enforcement in install.sh to prevent compatibility issues
- Streamline Arduino CLI installation logic for both Arch and other systems
- Improve Git and Lazygit installation messaging consistency
- Update install usage instructions for better clarity
- Enhance shell compatibility by enforcing bash execution

install.sh

@@ -3,10 +3,15 @@
 # Archduino Install — TUI Arduino Development Environment
 # Works on both native Arch Linux and Arch/Ubuntu WSL2
 #
-# Usage: curl -kL <url> | bash
+# Usage: chmod +x install.sh && ./install.sh
-#    or: chmod +x install.sh && ./install.sh
+#    or: bash install.sh
 #
 
+# Re-exec with bash if invoked via sh/dash
+if [ -z "$BASH_VERSION" ]; then
+  exec bash "$0" "$@"
+fi
+
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
 # ── Load helpers and detect environment ─────────────────────────

lib/arduino.sh

@@ -3,13 +3,11 @@
 
 step "7/9 — Installing Arduino CLI + board cores"
 
-if ! command -v arduino-cli &>/dev/null; then
 if $IS_ARCH; then
   $PKG_INSTALL arduino-cli
 else
   curl -kfsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | BINDIR=/usr/local/bin sudo sh
 fi
-fi
 info "Arduino CLI installed: $(arduino-cli version 2>/dev/null | head -1)"
 
 arduino-cli config init 2>/dev/null || true
@@ -22,15 +20,19 @@ arduino-cli config add board_manager.additional_urls \
 
 arduino-cli core update-index
 
-info "Installing AVR core..."
+info "Installing/updating AVR core..."
 arduino-cli core install arduino:avr
 
-info "Installing ESP32 core..."
+info "Installing/updating ESP32 core..."
 arduino-cli core install esp32:esp32
 
-info "Installing ESP8266 core..."
+info "Installing/updating ESP8266 core..."
 arduino-cli core install esp8266:esp8266
 
-# Common libs
+# Upgrade all installed cores to latest
+arduino-cli core upgrade
+
+# Common libs (install is idempotent, upgrade updates them)
 arduino-cli lib install "Servo" "ArduinoJson" "Adafruit Unified Sensor" "DHT sensor library" 2>/dev/null || true
-info "Board cores & libraries installed"
+arduino-cli lib upgrade 2>/dev/null || true
+info "Board cores & libraries installed/updated"

lib/common.sh

@@ -67,6 +67,17 @@ end_quiet_mode() {
   echo ""
 }
 
+# ── Config backup helper ─────────────────────────────────────────
+BACKUP_DIR="$HOME/.config/archduino/backups/$(date +%Y%m%d_%H%M%S)"
+
+backup_config() {
+  local src="$1"
+  [[ ! -e "$src" ]] && return 0
+  mkdir -p "$BACKUP_DIR"
+  cp -a "$src" "$BACKUP_DIR/"
+  info "Backed up $(basename "$src") → $BACKUP_DIR/"
+}
+
 # ── Detect environment ──────────────────────────────────────────
 IS_WSL=false
 [[ -f /proc/version ]] && grep -qi microsoft /proc/version && IS_WSL=true

lib/git.sh

@@ -3,7 +3,6 @@
 
 step "8/9 — Setting up Git + Lazygit"
 
-if ! command -v lazygit &>/dev/null; then
 if $IS_ARCH; then
   $PKG_INSTALL lazygit
 else
@@ -12,9 +11,9 @@ if ! command -v lazygit &>/dev/null; then
   tar xf /tmp/lazygit.tar.gz -C /tmp lazygit
   sudo mv /tmp/lazygit /usr/local/bin/
 fi
-fi
+info "Lazygit installed/updated"
-info "Lazygit installed"
 
 mkdir -p ~/.config/lazygit
+backup_config ~/.config/lazygit/config.yml
 write_lazygit_config ~/.config/lazygit/config.yml
 info "Lazygit configured with $THEME_DISPLAY_NAME"

lib/neovim.sh

@@ -23,21 +23,54 @@ fi
 
 step "6/9 — Setting up NvChad"
 
-if [[ ! -d "$HOME/.config/nvim/lua" ]]; then
+NVIM_CFG="$HOME/.config/nvim"
-  for d in ~/.config/nvim ~/.local/share/nvim ~/.local/state/nvim ~/.cache/nvim; do
+NVCHAD_FRESH=false
-    [[ -d "$d" ]] && mv "$d" "${d}.bak.$(date +%s)"
+
+# ── Detect existing config ──────────────────────────────────────
+if [[ -d "$NVIM_CFG/lua" ]]; then
+  if [[ -f "$NVIM_CFG/lua/chadrc.lua" ]]; then
+    # NvChad detected — update in place
+    info "Existing NvChad config detected, updating..."
+  elif grep -rq "LazyVim" "$NVIM_CFG/lua/" 2>/dev/null || [[ -f "$NVIM_CFG/lazyvim.json" ]]; then
+    # LazyVim detected — migrate to NvChad
+    warn "LazyVim config detected, migrating to NvChad..."
+    for d in "$NVIM_CFG" ~/.local/share/nvim ~/.local/state/nvim ~/.cache/nvim; do
+      if [[ -d "$d" ]]; then
+        backup_config "$d"
+        rm -rf "$d"
+      fi
     done
-  git clone https://github.com/NvChad/starter ~/.config/nvim
+    NVCHAD_FRESH=true
-  rm -rf ~/.config/nvim/.git
-  info "NvChad starter cloned"
   else
-  info "Neovim config already exists, skipping NvChad clone"
+    # Unknown config — back up and install fresh
+    warn "Unknown Neovim config detected, backing up..."
+    for d in "$NVIM_CFG" ~/.local/share/nvim ~/.local/state/nvim ~/.cache/nvim; do
+      if [[ -d "$d" ]]; then
+        backup_config "$d"
+        rm -rf "$d"
+      fi
+    done
+    NVCHAD_FRESH=true
+  fi
+else
+  # No config at all — fresh install
+  NVCHAD_FRESH=true
 fi
 
-# ── Theme ───────────────────────────────────────────────────────
+if $NVCHAD_FRESH; then
-mkdir -p ~/.config/nvim/lua
+  git clone https://github.com/NvChad/starter "$NVIM_CFG"
+  rm -rf "$NVIM_CFG/.git"
+  info "NvChad starter cloned"
+fi
 
-cat >~/.config/nvim/lua/chadrc.lua <<EOF
+# ── Clear NvChad theme cache so the new theme takes effect ──────
+rm -rf ~/.local/share/nvim/lazy/base46/lua/base46/themes 2>/dev/null || true
+rm -rf ~/.cache/nvim/base46 2>/dev/null || true
+
+# ── Theme ───────────────────────────────────────────────────────
+mkdir -p "$NVIM_CFG/lua"
+
+cat >"$NVIM_CFG/lua/chadrc.lua" <<EOF
 ---@type ChadrcConfig
 local M = {}
 
@@ -49,9 +82,9 @@ return M
 EOF
 
 # ── Arduino plugin ──────────────────────────────────────────────
-mkdir -p ~/.config/nvim/lua/plugins
+mkdir -p "$NVIM_CFG/lua/plugins"
 
-cat >~/.config/nvim/lua/plugins/arduino.lua <<'LUA'
+cat >"$NVIM_CFG/lua/plugins/arduino.lua" <<'LUA'
 return {
   {
     "stevearc/vim-arduino",
@@ -65,9 +98,9 @@ return {
 LUA
 
 # ── LSP (clangd) ───────────────────────────────────────────────
-mkdir -p ~/.config/nvim/lua/configs
+mkdir -p "$NVIM_CFG/lua/configs"
 
-cat >~/.config/nvim/lua/configs/lspconfig.lua <<'LUA'
+cat >"$NVIM_CFG/lua/configs/lspconfig.lua" <<'LUA'
 local configs = require "nvchad.configs.lspconfig"
 
 local on_attach = configs.on_attach
@@ -91,7 +124,7 @@ lspconfig.clangd.setup {
 LUA
 
 # ── Keymaps ─────────────────────────────────────────────────────
-cat >~/.config/nvim/lua/mappings.lua <<'LUA'
+cat >"$NVIM_CFG/lua/mappings.lua" <<'LUA'
 require "nvchad.mappings"
 
 local map = vim.keymap.set

lib/shell-config.sh

@@ -3,11 +3,7 @@
 
 step "Finalizing shell config"
 
-# Append archduino block to .zshrc if not already present
+ZSHRC_BLOCK='# ── ARCHDUINO CONFIG ────────────────────────────────────────────
-if ! grep -q "ARCHDUINO" ~/.zshrc 2>/dev/null; then
-  cat >>~/.zshrc <<'ZSHRC'
-
-# ── ARCHDUINO CONFIG ────────────────────────────────────────────
 plugins=(git zsh-autosuggestions zsh-syntax-highlighting)
 
 export PATH="$HOME/.local/bin:$PATH"
@@ -30,11 +26,21 @@ alias acm="arduino-cli monitor"
 alias acb="arduino-cli board list"
 alias lg="lazygit"
 alias v="nvim"
-# ── END ARCHDUINO ───────────────────────────────────────────────
+# ── END ARCHDUINO ───────────────────────────────────────────────'
-ZSHRC
+
-  info "Shell config updated"
+if grep -q "ARCHDUINO CONFIG" ~/.zshrc 2>/dev/null; then
+  # Update: replace existing block
+  backup_config ~/.zshrc
+  # Remove old block and write new one
+  sed -i '/^# ── ARCHDUINO CONFIG/,/^# ── END ARCHDUINO/d' ~/.zshrc
+  echo "" >> ~/.zshrc
+  echo "$ZSHRC_BLOCK" >> ~/.zshrc
+  info "Shell config updated (replaced Archduino block)"
 else
-  info "Shell config already contains Archduino block"
+  # Fresh install: append block
+  echo "" >> ~/.zshrc
+  echo "$ZSHRC_BLOCK" >> ~/.zshrc
+  info "Shell config updated"
 fi
 
 # ── WSL2 extras ─────────────────────────────────────────────────

lib/starship.sh

@@ -3,15 +3,14 @@
 
 step "3/9 — Installing Starship"
 
-if ! command -v starship &>/dev/null; then
 if $IS_ARCH; then
   $PKG_INSTALL starship
 else
   curl -ksS https://starship.rs/install.sh | sh -s -- -y
 fi
-fi
+info "Starship installed/updated"
-info "Starship installed"
 
 mkdir -p ~/.config
+backup_config ~/.config/starship.toml
 write_starship_config ~/.config/starship.toml
 info "Starship configured with $THEME_DISPLAY_NAME"

lib/zellij.sh

@@ -3,17 +3,16 @@
 
 step "4/9 — Installing Zellij"
 
-if ! command -v zellij &>/dev/null; then
 if $IS_ARCH; then
   $PKG_INSTALL zellij
 else
   curl -kL https://github.com/zellij-org/zellij/releases/latest/download/zellij-x86_64-unknown-linux-musl.tar.gz | tar xz -C /tmp
   sudo mv /tmp/zellij /usr/local/bin/
 fi
-fi
+info "Zellij installed/updated"
-info "Zellij installed"
 
 mkdir -p ~/.config/zellij/layouts
+backup_config ~/.config/zellij/config.kdl
 write_zellij_config ~/.config/zellij/config.kdl
 
 cat >~/.config/zellij/layouts/arduino.kdl <<'LAYOUT'

lib/zsh.sh

@@ -13,10 +13,12 @@ fi
 
 ZSH_CUSTOM="${ZSH_CUSTOM:-$HOME/.oh-my-zsh/custom}"
 
-[[ ! -d "$ZSH_CUSTOM/plugins/zsh-autosuggestions" ]] &&
+for plugin in zsh-autosuggestions zsh-syntax-highlighting; do
-  git clone https://github.com/zsh-users/zsh-autosuggestions "$ZSH_CUSTOM/plugins/zsh-autosuggestions"
+  if [[ ! -d "$ZSH_CUSTOM/plugins/$plugin" ]]; then
+    git clone "https://github.com/zsh-users/$plugin" "$ZSH_CUSTOM/plugins/$plugin"
+  else
+    git -C "$ZSH_CUSTOM/plugins/$plugin" pull --quiet 2>/dev/null || true
+  fi
+done
 
-[[ ! -d "$ZSH_CUSTOM/plugins/zsh-syntax-highlighting" ]] &&
+info "Zsh plugins installed/updated"
-  git clone https://github.com/zsh-users/zsh-syntax-highlighting "$ZSH_CUSTOM/plugins/zsh-syntax-highlighting"
-
-info "Zsh plugins installed"