✨ added zsh and antigen install- and auto-configure- script

scripts/zsh_setup_install.sh

@@ -0,0 +1,64 @@
+#!/bin/bash
+
+# Variables
+USERNAME=isabell
+USER_HOME=$(getent passwd $SUDO_USER | cut -d: -f6)
+VERS_CONFIG_PATH=$(dirname "${BASH_SOURCE[0]}")/../home-directory/.zshrc
+HOME_CONFIG_PATH=$USER_HOME/.zshrc
+ANTIGEN_PATH=$USER_HOME/.antigen
+
+# check, if sudo
+if [[ "$EUID" = 0 ]]; then
+    echo "starting zsh setup install."
+else
+    sudo -k # make sure to ask for password on next sudo
+    if sudo false; then
+        echo "wrong password"
+        exit 1
+    fi
+fi
+
+# creating symlink for .zshrc config file
+if [[ -f "$VERS_CONFIG_PATH" ]] && echo "Creating symlink from $HOME_CONFIG_PATH to $VERS_CONFIG_PATH"; then
+    if [[ -f "$HOME_CONFIG_PATH" ]]; then
+        ln -s "$HOME_CONFIG_PATH" "$VERS_CONFIG_PATH"
+    else
+        echo "$HOME_CONFIG_PATH already exists. Overwrite? (y/n)"
+        read OVERWRITE
+        if [[ "$OVERWRITE" == "y" ]]; then
+            rm "$HOME_CONFIG_PATH"
+            ln -s "$HOME_CONFIG_PATH" "$VERS_CONFIG_PATH"
+        fi
+    fi
+else
+    echo "$VERS_CONFIG_PATH missing. abort."
+    exit 1
+fi
+
+# install software
+
+## install zsh
+if [ "$(dpkg -l | awk '/zsh/ {print }'|wc -l)" -ge 1 ]; then
+    echo "zsh already installed. skipping"
+else
+    sudo apt update
+    sudo apt install zsh -y
+fi
+
+## install antigen.zsh
+if [[ -d "$ANTIGEN_PATH" ]]; then
+    if [[ -f "$ANTIGEN_PATH/antigen.zsh" ]]; then
+        echo "antigen already installed. skipping"
+    else
+        curl -L git.io/antigen > "$ANTIGEN_PATH/antigen.zsh"
+    fi
+else
+    mkdir "$ANTIGEN_PATH"
+    curl -L git.io/antigen > "$ANTIGEN_PATH/antigen.zsh"
+fi
+
+# set zsh as default shell
+echo "setting zsh as default shell."
+sudo -u "$USERNAME" chsh -s $(which zsh)
+
+echo "done."