# Bash Script Installer for Zsh, Go, Python, GNU GCC and .NET The "Bash Script Installer" simplifies the setup of Zsh, Go, Python, GNU GCC, and .NET on Unix-based systems, providing a user-friendly, automated installation process for developers. ## ZSH ``` bash -c "$(curl -fsSL https://gist.githubusercontent.com/weehongkoh/e56d8161fa47e3ac8416ad8340ee3f82/raw/zsh_ubuntu.sh)" ```

#!/bin/bash set -euo pipefail # ============================= # COLORS & LOGGING # ============================= RED='\033[0;31m' GREEN='\033[0;32m' YELLOW='\033[1;33m' BLUE='\033[0;34m' NC='\033[0m' log() { echo -e "${BLUE}[INFO]${NC} $*"; } ok() { echo -e "${GREEN}[OK]${NC} $*"; } warn() { echo -e "${YELLOW}[WARN]${NC} $*"; } err() { echo -e "${RED}[ERROR]${NC} $*" >&2; } # ============================= # FLAGS & CONFIG # ============================= SKIP_PACKAGES=false SKIP_GIT_CONFIG=false SKIP_SHELL_CHANGE=false # This flag is for non-interactive mode. # Interactive menu options will override this. CUSTOM_CONFIG=false SKIP_XCLIP=false INSTALL_HOMEBREW=false declare -A CONFIG_FILES=( [".alias"]="https://gist.githubusercontent.com/weehongkoh/72bdb76beacacf2ca3dd39a72395b9ee/raw/alias" [".func"]="https://gist.githubusercontent.com/weehongkoh/72bdb76beacacf2ca3dd39a72395b9ee/raw/func" [".pathrc"]="https://gist.githubusercontent.com/weehongkoh/72bdb76beacacf2ca3dd39a72395b9ee/raw/pathrc" [".sourcerc"]="https://gist.githubusercontent.com/weehongkoh/72bdb76beacacf2ca3dd39a72395b9ee/raw/sourcerc" [".vimrc"]="https://gist.githubusercontent.com/weehongkoh/72bdb76beacacf2ca3dd39a72395b9ee/raw/vimrc" [".zshrc"]="https://gist.githubusercontent.com/weehongkoh/72bdb76beacacf2ca3dd39a72395b9ee/raw/zshrc" ) # ============================= # OS DETECTION # ============================= detect_os() { if [ -f /etc/os-release ]; then . /etc/os-release echo "$ID" else echo "unknown" fi } # ============================= # REQUIREMENTS # ============================= check_requirements() { [[ $EUID -eq 0 ]] && err "Do not run as root" && exit 1 command -v sudo >/dev/null || { err "sudo required"; exit 1; } } # ============================= # INSTALLATION FUNCTIONS # ============================= update_system() { $SKIP_PACKAGES && return log "Updating system..." sudo apt-get update -y sudo apt-get upgrade -y ok "System updated" } install_packages() { $SKIP_PACKAGES && return log "Installing core packages..." sudo apt-get install -y \ zsh git vim curl wget unzip zip build-essential xz-utils ok "Packages installed" } set_timezone() { log "Setting timezone to Asia/Singapore..." sudo timedatectl set-timezone Asia/Singapore ok "Timezone set to Asia/Singapore" } install_xclip() { local os os=$(detect_os) [[ "$os" != "ubuntu" && "$os" != "debian" ]] && return 0 $SKIP_XCLIP && return 0 command -v xclip >/dev/null && ok "xclip already installed" && return 0 read -r -p "Install xclip? (y/N): " r case "$r" in [Yy]) sudo apt-get install -y xclip; ok "xclip installed" ;; *) log "Skipping xclip installation" ;; esac } configure_git() { $SKIP_GIT_CONFIG && return log "Configuring Git..." read -p "Git name (leave empty to skip): " name read -p "Git email (leave empty to skip): " email [[ -n "$name" ]] && git config --global user.name "$name" [[ -n "$email" ]] && git config --global user.email "$email" ok "Git configured" } install_homebrew() { ! $INSTALL_HOMEBREW && return command -v brew >/dev/null && ok "Homebrew already installed" && return log "Installing Homebrew..." /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" ok "Homebrew installed" } configure_shell() { $SKIP_SHELL_CHANGE && return log "Changing default shell to zsh..." local zsh_path zsh_path=$(command -v zsh) grep -qx "$zsh_path" /etc/shells || echo "$zsh_path" | sudo tee -a /etc/shells >/dev/null sudo chsh -s "$zsh_path" "$USER" ok "Shell changed (requires logout/login to take effect)" } install_oh_my_zsh() { [[ -d "$HOME/.oh-my-zsh" ]] && ok "Oh My Zsh already installed" && return log "Installing Oh My Zsh..." # Keep zshrc ensures we don't blow away configs if they exist RUNZSH=no CHSH=no KEEP_ZSHRC=yes \ sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)" ok "Oh My Zsh installed" } install_plugins() { log "Installing plugins..." local dir="${ZSH_CUSTOM:-$HOME/.oh-my-zsh/custom}/plugins" [[ -d "$dir/zsh-autosuggestions" ]] || git clone https://github.com/zsh-users/zsh-autosuggestions "$dir/zsh-autosuggestions" [[ -d "$dir/zsh-syntax-highlighting" ]] || git clone https://github.com/zsh-users/zsh-syntax-highlighting "$dir/zsh-syntax-highlighting" ok "Plugins installed" } install_theme() { log "Installing Spaceship theme..." local themes="${ZSH_CUSTOM:-$HOME/.oh-my-zsh/custom}/themes" local dir="$themes/spaceship-prompt" [[ -d "$dir" ]] || git clone https://github.com/spaceship-prompt/spaceship-prompt.git "$dir" --depth=1 ln -sf "$dir/spaceship.zsh-theme" "$themes/spaceship.zsh-theme" ok "Theme installed" } download_configs() { # Guard clause removed so menu selection works log "Downloading custom config files..." local backup="$HOME/.config_backup_$(date +%Y%m%d_%H%M%S)" mkdir -p "$backup" for f in "${!CONFIG_FILES[@]}"; do if [[ -f "$HOME/$f" ]]; then cp "$HOME/$f" "$backup/" fi log "Fetching $f ..." curl -fsSL "${CONFIG_FILES[$f]}" -o "$HOME/$f" || warn "Failed to download $f" done ok "Configs downloaded (Backup at $backup)" } update_zshrc() { local zshrc="$HOME/.zshrc" log "Updating .zshrc..." # Create zshrc if missing to prevent errors if [[ ! -f "$zshrc" ]]; then warn ".zshrc not found, creating new one..." touch "$zshrc" fi # Use || true to prevent 'set -e' from exiting if grep finds nothing grep -q 'ZSH_THEME="spaceship"' "$zshrc" || sed -i 's/ZSH_THEME=".*"/ZSH_THEME="spaceship"/' "$zshrc" grep -q 'zsh-autosuggestions' "$zshrc" || sed -i 's/plugins=(/plugins=(zsh-autosuggestions /' "$zshrc" grep -q 'zsh-syntax-highlighting' "$zshrc" || sed -i 's/plugins=(/plugins=(zsh-syntax-highlighting /' "$zshrc" ok ".zshrc updated with plugins and theme" } switch_shell() { $SKIP_SHELL_CHANGE && return log "Starting Zsh session..." echo -e "${YELLOW}Type 'exit' to return to this installer menu.${NC}" echo "----------------------------------------" # Run zsh as a subprocess, not exec zsh -l echo "----------------------------------------" ok "Returned from Zsh session" } # ============================= # INTERACTIVE MENU # ============================= show_menu() { echo "===========================================" echo "Zsh Installer - Choose what to do" echo "===========================================" echo " 1) Update system packages" echo " 2) Install core packages (zsh, git, vim, etc.)" echo " 3) Set Timezone (Asia/Singapore)" echo " 4) Install xclip" echo " 5) Configure Git" echo " 6) Install Homebrew" echo " 7) Configure shell (chsh - sets default shell)" echo " 8) Install Oh My Zsh" echo " 9) Install plugins (autosuggestions, syntax highlighting)" echo "10) Install Spaceship theme" echo "11) Download custom configs (~/.alias, .vimrc, etc.)" echo "12) Update ~/.zshrc for plugins & theme" echo "13) Switch to Zsh (Temporary Sub-shell)" echo "14) Quit" echo "===========================================" echo "You can enter multiple numbers at once (e.g., 2,3,7,8)" } run_choices() { local input read -p "Select: " input input="${input//,/ }" # replace commas with spaces for choice in $input; do case "$choice" in 1) update_system ;; 2) install_packages ;; 3) set_timezone ;; 4) install_xclip ;; 5) configure_git ;; 6) install_homebrew ;; 7) configure_shell ;; 8) install_oh_my_zsh ;; 9) install_plugins ;; 10) install_theme ;; 11) download_configs ;; 12) update_zshrc ;; 13) switch_shell ;; 14) log "Exiting..."; exit 0 ;; *) warn "Skipping invalid option: $choice" ;; esac echo done } # ============================= # MAIN # ============================= main() { check_requirements while true; do show_menu run_choices read -p "Do you want to run more options? (y/n): " again [[ "$again" =~ ^[Yy]$ ]] || break done ok "Zsh installation/configuration complete!" } main "$@"