setup.sh

#!/bin/bash

## Bash settings
set -euo pipefail

## Script globals
script_name=$(basename "${BASH_SOURCE[0]}")
script_dir=$({ cd "$(dirname "${BASH_SOURCE[0]}")" || { echo "Failed to access script file directory" >&2; exit; } } && pwd)
script_dir_abs=$({ cd "$(dirname "${BASH_SOURCE[0]}")" || { echo "Failed to access script file directory" >&2; exit; } } && pwd -P)
script_file="${script_dir}/${script_name}"
if [ -L "${BASH_SOURCE[0]}" ]; then
    script_file_abs=$(readlink "${BASH_SOURCE[0]}")
else
    script_file_abs="${script_dir_abs}/${script_name}"
fi
export CURRENT_PARENT_BASH_SCRIPT_FILE="$script_file"
script_args=("$@")

## Script imports
lib_dir="${script_dir_abs}/lib"
bash_functions_script="${lib_dir}/bash_script_func.sh"

## Source imports
source "$bash_functions_script"


## Custom globals
config_dir="${script_dir_abs}/config"
config_fname_exclude_arr=( '.DS_Store' )
symlink_errors=false


# Create ~/.ssh directory, if it doesn't already exist, to ensure that
# the .ssh folder at shell-utils/config/.ssh is NOT symlinked into the home directory.
if [ -e "${config_dir}/.ssh" ] && [ ! -e "${HOME}/.ssh" ] && [ ! -L "${HOME}/.ssh" ]; then
    mkdir -m 700 "${HOME}/.ssh"
fi


echo "Restricting permissions of config files to read/write/execute only by owner..."
chmod -R u=rwX,g=,o= "$config_dir"

echo
while IFS= read -r config_file_new; do
    config_fname=$(basename "$config_file_new")
    config_file_old="${HOME}/${config_fname}"
    config_file_bak="${HOME}/${config_fname}_system_default"

    if [ "$(itemOneOf "$config_fname" "${config_fname_exclude_arr[@]}")" = true ]; then
        continue
    fi

    if [ -e "$config_file_old" ] || [ -L "$config_file_old" ]; then
        if [ -L "$config_file_old" ]; then
            config_file_old_target=$(readlink "$config_file_old")
            echo "Removing existing config file symlink from home dir (${config_file_old} -> ${config_file_old_target})"
            rm "$config_file_old"
        elif [ -d "$config_file_old" ]; then
            echo -e "\nWARNING: Will not tamper with existing directory:\n  ${config_file_old}"
            echo -e "** You may want to manually copy/link over contents of the following directory **\n${config_file_new}\n"
        elif [ -e "$config_file_bak" ] && [ ! -L "$config_file_bak" ]; then
            symlink_errors=true
            echo -e "\nERROR: Will not replace existing non-link backup config file:\n  ${config_file_bak}"
            echo -e "** Manually remove or backup this file and then rerun script **\n"
        else
            echo -e "\n** Backing up existing non-link config file: ${config_fname} **"
            mv -v "$config_file_old" "$config_file_bak"
            echo
        fi
    fi

    if [ ! -e "$config_file_old" ]; then
        echo "Symlinking shell-utils config file to home directory: ${config_fname}"
        ln -s "$config_file_new" "${HOME}/"
    fi
done <<< "$(find "$config_dir" -mindepth 1 -maxdepth 1)"

if [ -L "${HOME}/.bashrc" ]; then
    echo "Duplicating .bashrc_integrated symlink as .bashrc in home directory"
    cp -af "${HOME}/.bashrc_integrated" "${HOME}/.bashrc"
fi

if [ -L "${HOME}/.bash_profile" ]; then
    echo "Duplicating .bash_profile_integrated symlink as .bash_profile in home directory"
    cp -af "${HOME}/.bash_profile_integrated" "${HOME}/.bash_profile"
fi

echo -e "\nDone!"
if [ "$symlink_errors" = true ]; then
    echo -e "\n!! Errors symlinking one or more config files !!"
fi
echo -e "\nCheck the results of 'ls -la ~/' or 'find ~/ -maxdepth 1 -name \".*\" -ls' to verify symlinks"