setup.sh

#!/usr/bin/env bash

declare -r GITHUB_REPOSITORY="musq/dotfiles-system"

declare -r DOTFILES_ORIGIN="https://github.com/$GITHUB_REPOSITORY.git"
declare -r DOTFILES_TARBALL_URL="https://github.com/$GITHUB_REPOSITORY/tarball/master"
declare -r DOTFILES_UTILS_URL="https://raw.githubusercontent.com/$GITHUB_REPOSITORY/master/src/os/utils.sh"

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

declare dotfilesDirectory="$HOME/projects/dotfiles-system"
declare skipQuestions=false

# ----------------------------------------------------------------------
# | Helper Functions                                                   |
# ----------------------------------------------------------------------

download() {

    local url="$1"
    local output="$2"

    if command -v "curl" &> /dev/null; then

        curl -LsSo "$output" "$url" &> /dev/null
        #     │││└─ write output to file
        #     ││└─ show error messages
        #     │└─ don't show the progress meter
        #     └─ follow redirects

        return $?

    elif command -v "wget" &> /dev/null; then

        wget -qO "$output" "$url" &> /dev/null
        #     │└─ write output to file
        #     └─ don't show output

        return $?
    fi

    return 1

}

download_dotfiles() {

    local tmpFile=""

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    print_in_purple "\n ● Download and extract archive\n\n"

    tmpFile="$(mktemp /tmp/XXXXX)"

    download "$DOTFILES_TARBALL_URL" "$tmpFile"
    print_result $? "Download archive" "true"
    printf "\n"

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    if ! $skipQuestions; then

        ask_for_confirmation "Do you want to store the dotfiles in '$dotfilesDirectory'?"

        if ! answer_is_yes; then
            dotfilesDirectory=""
            while [ -z "$dotfilesDirectory" ]; do
                ask "Please specify another location for the dotfiles (path): "
                dotfilesDirectory="$(get_answer)"
            done
        fi

        # Ensure the `dotfiles` directory is available

        while [ -e "$dotfilesDirectory" ]; do
            ask_for_confirmation "'$dotfilesDirectory' already exists, do you want to overwrite it?"
            if answer_is_yes; then
                rm -rf "$dotfilesDirectory"
                break
            else
                dotfilesDirectory=""
                while [ -z "$dotfilesDirectory" ]; do
                    ask "Please specify another location for the dotfiles (path): "
                    dotfilesDirectory="$(get_answer)"
                done
            fi
        done

        printf "\n"

    else

        rm -rf "$dotfilesDirectory" &> /dev/null

    fi

    mkdir -p "$dotfilesDirectory"
    print_result $? "Create '$dotfilesDirectory'" "true"

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    # Extract archive in the `dotfiles` directory.

    extract "$tmpFile" "$dotfilesDirectory"
    print_result $? "Extract archive" "true"

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    rm -rf "$tmpFile"
    print_result $? "Remove archive"

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    cd "$dotfilesDirectory/src/os" \
        || return 1

}

download_utils() {

    local tmpFile=""

    tmpFile="$(mktemp /tmp/XXXXX)"

    download "$DOTFILES_UTILS_URL" "$tmpFile" \
        && . "$tmpFile" \
        && rm -rf "$tmpFile" \
        && return 0

   return 1

}

extract() {

    local archive="$1"
    local outputDir="$2"

    if command -v "tar" &> /dev/null; then
        tar -zxf "$archive" --strip-components 1 -C "$outputDir"
        return $?
    fi

    return 1

}

# ----------------------------------------------------------------------
# | Main                                                               |
# ----------------------------------------------------------------------

main() {

    # Set appropriate umask
    umask 022

    # Ensure that the following actions
    # are made relative to this file's path.

    cd "$(dirname "${BASH_SOURCE[0]}")" \
        || exit 1

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    # Load utils

    if [ -x "utils.sh" ]; then
        . "utils.sh" || exit 1
    else
        download_utils || exit 1
    fi

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    printf "\n\n\n"
    print_in_color "  ██████╗  ██████╗ ████████╗███████╗██╗██╗     ███████╗███████╗                    \n" 6 # cyan
    print_in_color "  ██╔══██╗██╔═══██╗╚══██╔══╝██╔════╝██║██║     ██╔════╝██╔════╝      ██╗      ██╗  \n" 6 # cyan
    print_in_color "  ██║  ██║██║   ██║   ██║   █████╗  ██║██║     █████╗  ███████╗    ██████╗  ██████╗\n" 6 # cyan
    print_in_color "  ██║  ██║██║   ██║   ██║   ██╔══╝  ██║██║     ██╔══╝  ╚════██║    ╚═██╔═╝  ╚═██╔═╝\n" 6 # cyan
    print_in_color "  ██████╔╝╚██████╔╝   ██║   ██║     ██║███████╗███████╗███████║      ╚═╝      ╚═╝  \n" 6 # cyan
    print_in_color "  ╚═════╝  ╚═════╝    ╚═╝   ╚═╝     ╚═╝╚══════╝╚══════╝╚══════╝                    \n" 6 # cyan
    printf "\n"

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    skip_questions "$@" \
        && skipQuestions=true

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    if [ "$(user_has_sudo)" != "no_sudo" ]; then
        ask_for_sudo
    fi

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    # Check if this script was run directly (./<path>/setup.sh),
    # and if not, it most likely means that the dotfiles were not
    # yet set up, and they will need to be downloaded.

    printf "%s" "${BASH_SOURCE[0]}" | grep "setup.sh" &> /dev/null \
        || download_dotfiles

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    ./create_backup.sh

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    ./create_symbolic_links.sh "$@"

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    ./create_configs.sh

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    ./contract/main-before.sh

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    ./install/main.sh "$@"

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    ./contract/main-after.sh

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    # Source /etc/profile to load nix in PATH
    . /etc/profile

    # Initialize git repository
    if cmd_exists "git"; then

        if [ "$(git config --get remote.origin.url)" != "$DOTFILES_ORIGIN" ]; then
            ./initialize_git_repository.sh "$DOTFILES_ORIGIN"
        fi

    fi

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    print_in_yellow "\n You should probably run these commands -\n"
    print_in_yellow " - sudo systemctl restart sshd\n"
    print_in_yellow " - sudo systemctl enable nginx\n"
    print_in_yellow "\n"

}

main "$@"