setup

#!/bin/bash
# shellcheck disable=SC1090
set -o errexit
set -o pipefail
set -o nounset

DOTFILES_SETUP_SCRIPT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &>/dev/null && pwd)
export DOTFILES_SETUP_SCRIPT_DIR

source "$DOTFILES_SETUP_SCRIPT_DIR/bashrc.d/010-colors.sh"

usage() {
    echo "Usage: $0 [--help] [[SETUP_STEP] ...]"
    echo
    echo "  --help, -h      Show this help and exit"
    echo
    echo "  SETUP_STEP      Optional path(s) to individual setup steps to run"
    echo "                  By default, all steps in setup.d/ will run in order"
}

prompt_default_no() {
    local prompt="$1"

    read -p "${BOLD}${YELLOW}${prompt}${RESET} [y/N]: " -r

    if [[ $REPLY =~ ^[Nn]$ || -z "$REPLY" ]]; then
        return 1
    fi
    return 0
}

prompt_default_yes() {
    local prompt="$1"

    read -p "${BOLD}${YELLOW}${prompt}${RESET} [Y/n]: " -r

    if [[ $REPLY =~ ^[Yy]$ || -z "$REPLY" ]]; then
        return 0
    fi
    return 1
}

github_latest_release_tag() {
    local repo="$1"
    local response
    local tag

    if ! response=$(curl --silent --show-error --fail "https://api.github.com/repos/$repo/releases/latest" 2>&1); then
        error "Failed to fetch latest release for $repo: $response"
        return 1
    fi

    if ! tag=$(printf '%s' "$response" | grep --only-matching --perl-regexp '"tag_name": "\K(.*)(?=")'); then
        error "Could not parse tag_name from GitHub response for $repo"
        return 1
    fi

    printf '%s\n' "$tag"
}

github_download_release() {
    local repo="$1"
    local version="$2"
    local artifact="$3"
    local output="${4:-$artifact}"
    local url="https://github.com/$repo/releases/download/$version/$artifact"

    if ! curl \
        --fail \
        --show-error \
        --location \
        --output "$output" \
        --remote-name "$url"; then
        error "Failed to download release artifact $artifact from $repo ($url)"
        return 1
    fi
}

debug() {
    echo "${BLUE}DEBUG:${RESET} $*"
}

info() {
    echo "${GREEN}INFO:${RESET} $*"
}

error() {
    echo "${RED}ERROR:${RESET} $*" >&2
}

main() {
    local setup_steps=()

    while [[ $# -gt 0 ]]; do
        case $1 in
        --help | -h)
            usage
            exit 0
            ;;
        -*)
            error "Unknown option: '$1'"
            exit 1
            ;;
        *)
            setup_steps+=("$1")
            ;;
        esac
        shift
    done

    # GLOBIGNORE needs to have the same directory prefix as the glob down below
    local glob_prefix="$DOTFILES_SETUP_SCRIPT_DIR/setup.d"
    if grep -i ubuntu /etc/os-release &>/dev/null; then
        debug "Detected Ubuntu"
        export GLOBIGNORE="$glob_prefix/*fedora*:$glob_prefix/.*"
    elif grep -i fedora /etc/os-release &>/dev/null; then
        debug "Detected Fedora"
        export GLOBIGNORE="$glob_prefix/*ubuntu*:$glob_prefix/.*"
    else
        error "Unknown OS detected from /etc/os-release"
        exit 1
    fi

    if [[ "${#setup_steps[@]}" -gt 0 ]]; then
        for setup_step in "${setup_steps[@]}"; do
            if [[ ! -f "$setup_step" ]]; then
                error "Step: '$setup_step' doesn't exist..."
                exit 1
            fi

            debug "Running: $setup_step ..."
            source "$setup_step"
        done
    else
        for setup_step in "$glob_prefix"/*; do
            debug "Running: $setup_step ..."
            source "$setup_step"
        done
    fi
    info "Finished running setup steps."
}

main "$@"