add installation script

install.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+warn()    { printf '\E[33m'; echo "$@"; printf '\E[0m'; }
+error()   { printf '\E[31m'; echo "$@"; printf '\E[0m'; }
+success() { printf '\E[32m'; echo "$@"; printf '\E[0m'; }
+abort()   { warn "$@"; error "Installation aborted."; exit 1; }
+
+[[ -d "$HOME/.local/share/zsh" || -e "$HOME/.config/.zshrc" || -e "$HOME/.zshenv" ]] && abort ".local/share/zsh, .config/.zshrc and/or .zshenv found in $USER's home directory. Make sure these files don't already exist."
+
+if hash exa git nano zsh 2>/dev/null; then
+  success "exa git nano and zsh already installed, skipping installation."
+else
+  ls /root >/dev/null 2>&1  || abort "No root privileges. Run this script as sudo or install exa git nano and zsh manually."
+  hash apt-get 2>/dev/null  || abort "apt-get not found. Install exa git nano and zsh with your system's package manager."
+  apt-get update >/dev/null && apt-get -y install exa git nano zsh >/dev/null || abort "apt-get installation failed. After fixing the errors run 'apt-get install exa git nano zsh' or this script again."
+  success "Installation of exa git nano and zsh successfull."
+fi
+
+git clone --recurse -q https://git.sdf.org/michael/zsh "$HOME/.local/share/zsh" && success "git clone successfull." || abort "Could not clone git repository."
+cp "$HOME/.local/share/zsh/zshenv" "$HOME/.zshenv"
+mkdir -p "$HOME/.config"
+ln -fs ../.local/share/zsh/zshrc "$HOME/.config/.zshrc"
+test -x /bin/zsh && chsh -s /bin/zsh && success "Zsh set as default shell." || warn "Could not set Zsh as default shell. Run chsh or edit /etc/passwd."
+
+success "Installation complete."

readme.md

@@ -1,8 +1,14 @@
-### Install [exa](https://the.exa.website) and [nano](https://www.nano-editor.org)
+### Manual installation
 ```
 git clone --recurse https://git.sdf.org/michael/zsh ~/.local/share/zsh
-ln -s ../.local/share/zsh/zshrc ~/.config/.zshrc
 cp ~/.local/share/zsh/zshenv ~/.zshenv
-usermod --shell $(which zsh) $(whoami)
+mkdir -p ~/.config
+ln -s ../.local/share/zsh/zshrc ~/.config/.zshrc
 ```
+
+### Installation script
+```
+curl -s https://git.sdf.org/michael/zsh/raw/branch/master/install.sh | bash
+```
+
 ![Screenshot](https://michael.sdf.org/zsh.png)

zshrc

@@ -89,4 +89,4 @@ ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE=fg=024
 ZSH_AUTOSUGGEST_STRATEGY=(history completion)
 ZSH_HIGHLIGHT_STYLES[comment]=fg=245
 
-(( $+commands[fortune] && $+commands[cowsay] && $+commands[lolcat] )) && fortune -s | cowsay -f small | lolcat -r -v 1
+(( $+commands[fortune] && $+commands[cowsay] && $+commands[lolcat] )) && echo && fortune -s | cowsay -f small | lolcat -r -v 1