dotfiles/install

#!/bin/bash

set -ueo pipefail
shopt -s nullglob

readonly TARGET_PATH="$HOME"

readonly SUB="$(pwd)/home/user"


declare -A TARGETS=(
    ["bash"]=".config/bash .bashrc .profile"
    ["zsh"]="%bash .config/zsh .zshrc .zprofile .zlogout .inputrc"
    ["tmux"]=".tmux.conf"
    ["alacritty"]=".config/alacritty"
    ["nvim"]=".config/nvim .local/bin/vim_askpass_helper .local/bin/vim_askpass_helper_python"
    ["ssh"]=""
    ["git"]=".config/git"
    ["ranger"]=".config/ranger"
    ["gpg"]=""
    ["i3"]=".xinitrc .config/i3 .config/i3status .local/bin/i3status_wrapper .config/picom .local/bin/slm"
    ["bat"]=".config/bat"
    ["font"]=""
    ["termux"]=""
    ["arch"]=""
    ["psql"]=".psqlrc"
    ["docker"]=".docker/cli-plugins"
    ["ipython"]=".ipython/profile_default/ipython_config.py"
)

_die() {
    echo "$0: $1" >&2
    exit "$2"
}

test "$0" = "./install" || _die "Error: Please, run this file from root of dotfiles, like this './install.sh TARGET" 1


_die_if_installed() {
    if [ -e "$1" ]; then
        _die "Already installed" 1
    fi
}

_link_files_in_sandbox() {
    local targetfile
    for targetfile in "$@"
    do
        echo "installing: $targetfile"
        if [ "${targetfile::1}" = "%" ]; then
            _link_files_in_sandbox ${TARGETS["${targetfile:1}"]}
        else
            if [ ! "$(dirname "$targetfile")" = "." ]; then
                mkdir -p "$SANDBOX_PATH/$(dirname "$targetfile")"
            fi
            ln -sT "$SUB/$targetfile" "$SANDBOX_PATH/$targetfile"
        fi
    done
}

_compare_sandbox_to_home() {
    local comparisons
    comparisons="$(diff -rq "$SANDBOX_PATH" "$TARGET_PATH")"
    echo "$comparisons" | grep -vE "^Only in .+"
}

_merge_sandbox_to_home() {
    set +e
    cp -RTnP "$SANDBOX_PATH" "$TARGET_PATH"
    set -e
}

__install_from_sandbox() {

    local comparisons="$(_compare_sandbox_to_home)"

    if [ -n "$comparisons" ]; then
        echo "$comparisons" >&2
        echo "Reverting..." >&2
        _die "Found conflicting files. Exiting" 1
    fi

    echo "Merging to home..."
    _merge_sandbox_to_home
    echo "Successfully installed"
}

cmd_bash() {
    _link_files_in_sandbox ${TARGETS["bash"]}
    __install_from_sandbox
}

cmd_zsh() {
    _link_files_in_sandbox ${TARGETS["zsh"]}
    __install_from_sandbox
}


cmd_tmux() {
    _link_files_in_sandbox ${TARGETS["tmux"]}
    __install_from_sandbox
}

cmd_alacritty() {
    _link_files_in_sandbox ${TARGETS["alacritty"]}
    __install_from_sandbox
}

cmd_nvim() {
    echo "sudo pacman -S npm ctags fzf glow; mkdir ~/.npm-global; npm config set prefix '~/.npm-global'"

    _link_files_in_sandbox ${TARGETS["nvim"]}
    __install_from_sandbox
}

cmd_ssh() {
    cat "$SUB/.ssh/config" >> "$HOME/.ssh/config"
}

cmd_git() {
    _link_files_in_sandbox ${TARGETS["git"]}
    __install_from_sandbox
}

cmd_ranger() {
    echo "sudo pacman -S highlight ttf-joypixels noto-fonts-emoji ueberzug poppler"

    _link_files_in_sandbox ${TARGETS["ranger"]}

    mkdir -p "$SANDBOX_PATH/.config/ranger/plugins"
    git clone https://github.com/alexanderjeurissen/ranger_devicons "$SANDBOX_PATH/.config/ranger/plugins/ranger_devicons"
    __install_from_sandbox
    ranger --copy-config=all
}

cmd_gpg() {
    _die_if_installed "$HOME/.gnupg"

    cat "$SUB/.gnupg/gpg.conf" >> "$HOME/.gnupg/gpg.conf"
    echo -e "default-cache-ttl 1\nmax-cache-ttl 1" > "$HOME/.gnupg/gpg-agent.conf"; echo RELOADAGENT | gpg-connect-agent
}

cmd_i3() {
    echo "sudo pacman -S nitrogen picom compton ttf-font-awesome xdotool xclip maim playerctl"
    _link_files_in_sandbox ${TARGETS["i3"]}
    __install_from_sandbox
}

cmd_bat() {
    _link_files_in_sandbox ${TARGETS["bat"]}
    __install_from_sandbox
}

cmd_ipython() {
    _link_files_in_sandbox ${TARGETS["ipython"]}
    __install_from_sandbox
}

cmd_font() {
    local sub
    sub="$HOME/.local/share/fonts"

    mkdir -p "$sub"
    cd "$sub"
    wget 'https://github.com/ryanoasis/nerd-fonts/releases/download/v2.1.0/FiraCode.zip'
    unzip FiraCode.zip -d "$sub"
    git clone 'https://github.com/powerline/fonts.git' --depth=1
    cd fonts
    ./install.sh
}

cmd_termux() {
    echo "apt install termux-api tsu"
}

cmd_arch() {
    echo 'echo "ParallelDownloads = 5" >> /etc/pacman.conf'
    echo 'sudo systemctl enable --now gpm'
}

cmd_psql() {
    _link_files_in_sandbox ${TARGETS["psql"]}
    __install_from_sandbox
}

cmd_docker() {
    _link_files_in_sandbox ${TARGETS["docker"]}
    __install_from_sandbox
}

is_target_installed() {
    local not_fully_installed=0

    local targetfile
    for targetfile in ${TARGETS["$1"]}
    do
        if [ "${targetfile::1}" = "%" ]; then
            is_target_installed "${targetfile:1}" || not_fully_installed=1
        else
            if [ ! -e "$TARGET_PATH/$targetfile" ]; then
                echo "$targetfile not linked"
                not_fully_installed=1
            fi
        fi
    done
    if (( not_fully_installed != 0 )); then
        echo "Target '$1' not fully installed"
        echo
        return 1
    fi
    return 0
}

find_targets_that_depend_on() {
    local target
    for target in "${!TARGETS[@]}"
    do
        if [[ " ${TARGETS["$target"]} " =~ %$1 ]]; then
            echo "$target"
        fi
    done
}

die_if_installed_targets_depend_on() {
    for reverse_dependecy in $(find_targets_that_depend_on "$1")
    do
        if is_target_installed "$reverse_dependecy" >/dev/null; then
            _die "target '$reverse_dependecy' is depends on installed target '$1'. Exiting..." 1
        fi
    done
}

cmd_unlink() {
    local target targetfile
    for target in "$@"
    do
        die_if_installed_targets_depend_on "$target"

        for targetfile in ${TARGETS["$target"]}
        do
            if [ "${targetfile::1}" = "%" ]; then
                continue
            fi

            if [ -e "$TARGET_PATH/$targetfile" ]; then
                unlink "$TARGET_PATH/$targetfile"
            fi
        done
    done
}

cmd_no_target() {
    _die "TARGET not exists" 1
}


cmd_list() {
    echo "${!TARGETS[@]}"
}

cmd_install() {
    local target
    for target in "$@"
    do
        SANDBOX_PATH="$(mktemp -td "${USER:=user}.dotfiles_XXXXXXX")"
        case "$target" in
            bash) shift;       cmd_bash        "$@" ;;
            zsh) shift;        cmd_zsh         "$@" ;;
            tmux) shift;       cmd_tmux        "$@" ;;
            alacritty) shift;  cmd_alacritty   "$@" ;;
            nvim) shift;       cmd_nvim        "$@" ;;
            ssh) shift;        cmd_ssh         "$@" ;;
            git) shift;        cmd_git         "$@" ;;
            ranger) shift;     cmd_ranger      "$@" ;;
            gpg) shift;        cmd_gpg         "$@" ;;
            i3) shift;         cmd_i3          "$@" ;;
            bat) shift;        cmd_bat         "$@" ;;
            font) shift;       cmd_font        "$@" ;;
            termux) shift;     cmd_termux      "$@" ;;
            arch) shift;       cmd_arch        "$@" ;;
            psql) shift;       cmd_psql        "$@" ;;
            docker) shift;     cmd_docker      "$@" ;;
            ipython) shift;    cmd_ipython     "$@" ;;
            *) shift;          cmd_no_target   "$@" ;;
        esac
        rm -rf "$SANDBOX_PATH"
    done
}

cmd_help() {
    echo "Dotfiles installation script:
Usage: ./install TARGET...
Usage: ./install unlink TARGET...
Usage: ./install check TARGET
Usage: ./install list"
}

unset executed_command
readonly executed_command="$1"

case "$executed_command" in
    unlink) shift;   cmd_unlink             "$@" ;;
    check) shift;    is_target_installed    "$@" ;;
    list) shift;     cmd_list               "$@" ;;
    help) shift;     cmd_help               "$@" ;;
    *) shift;        cmd_install "$executed_command" "$@" ;;
esac
exit 0