install

#!/bin/sh

set -eu

NIX_INSTALL_URL="${NIX_INSTALL_URL:-https://nixos.org/nix/install}"

TOOLBOX_CHANNEL_URL="${1:-https://github.com/Caascad/toolbox/archive/master.tar.gz}"

log() {
    args="$*"
    printf "\033[32m[toolbox]:\033[0m %s\n" "$args"
}

log_warning() {
    args="$*"
    printf "\033[33m[toolbox]:\033[0m %s\n" "$args"
}

log_run() {
    cmd="$1"
    log "Running: $cmd"
    eval "$cmd"
}

_sourceNix() {
    NIX_SH="$HOME/.nix-profile/etc/profile.d/nix.sh"
    if [ -f "$NIX_SH" ]; then
        # shellcheck source=/dev/null
        . "$NIX_SH"
    fi
}

_isNixInstalled() {
    nix --version >/dev/null 2>&1
}

_isSubstituterConfigured() {
    nix show-config | grep -q "toolbox.cachix.org"
}

_isChannelInstalled() {
    nix-channel --list | grep -q toolbox
}

_addCacheConfig() {
    if test -f ~/.config/nix/nix.conf
    then
        log_warning "$HOME/.config/nix/nix.conf exists."
        log "Please make sure the following options are properly set:"
        log " substituters = https://cache.nixos.org https://toolbox.cachix.org"
        log " trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= toolbox.cachix.org-1:ZFzO+86jD4G5ukgmLOnQRxjVmMcqu+60JTusH6pv8/8="
        log " experimental-features = nix-command"
    else
        mkdir -p "$HOME"/.config/nix/
        cat << EOF > "$HOME"/.config/nix/nix.conf
substituters = https://cache.nixos.org https://toolbox.cachix.org
trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= toolbox.cachix.org-1:ZFzO+86jD4G5ukgmLOnQRxjVmMcqu+60JTusH6pv8/8=
experimental-features = nix-command
EOF
    fi
}

log "Initializing setup ..."

if _isNixInstalled ; then
    log "Nix is already installed"
else
    log "Looks like nix is not installed yet"
    log_run "curl -L \"$NIX_INSTALL_URL\" | sh"
    _sourceNix
fi

if _isSubstituterConfigured; then
    log "Cache is already configured"
else
    log "Adding toolbox binary cache"
    _addCacheConfig
fi

if _isChannelInstalled; then
  log "Channel is already configured"
else
  log "Adding toolbox channel"
  log_run "nix-channel --add $TOOLBOX_CHANNEL_URL toolbox"
fi

log "Updating channel"
log_run "nix-channel --update toolbox"

log "Installing toolbox"
log_run "nix build -f '<toolbox>' toolbox --no-link"
log_run "nix-env -f '<toolbox>' -iA toolbox"

log "Installation finished !"
log "Don't forget to configure your .bashrc with:"

echo ""
cat <<EOF
. /home/$USER/.nix-profile/etc/profile.d/nix.sh
EOF