#!/usr/bin/env bash
# Firelink installer: https://firelink.estuslabs.com
#
#   curl -fsSL https://firelink.estuslabs.com/install | bash
#
# Clones Firelink into ~/.local/share/firelink (or updates it if it's already
# there), then runs its install.sh. Read that script first if you like:
# https://github.com/rwhitmire/firelink/blob/master/install.sh
#
# Everything is inside main(), so a partly downloaded script doesn't run.

main() {
    set -euo pipefail
    local repo=https://github.com/rwhitmire/firelink.git
    local dir=$HOME/.local/share/firelink

    if [ "$(id -u)" -eq 0 ]; then
        echo "firelink: run this as your normal user, not root" >&2
        exit 1
    fi
    if ! grep -q '^ID=fedora$' /etc/os-release 2>/dev/null; then
        echo "firelink: Firelink is for Fedora" >&2
        exit 1
    fi

    if ! command -v git >/dev/null; then
        echo "firelink: installing git"
        sudo dnf install -y git </dev/tty
    fi

    if [ -d "$dir/.git" ]; then
        echo "firelink: updating $dir"
        git -C "$dir" pull --ff-only
    elif [ -e "$dir" ]; then
        echo "firelink: $dir exists but isn't a Firelink checkout; move it aside and retry" >&2
        exit 1
    else
        echo "firelink: cloning into $dir"
        git clone --depth 1 "$repo" "$dir"
    fi

    # This script arrives on stdin, so give the installer the terminal back
    # for sudo's password prompt
    exec "$dir/install.sh" </dev/tty
}

main "$@"