#!/bin/sh
# 安装当前发布的 LOCUS。
#   curl -fsSL https://locus.casa/releases/install | sh
# 把参数交给安装器：
#   curl -fsSL https://locus.casa/releases/install | sh -s -- install -y
# 固定版本：
#   LOCUS_VERSION=0.1.0 curl -fsSL https://locus.casa/releases/install | sh
set -eu

BASE="${LOCUS_RELEASE_BASE:-https://locus.casa/releases}"
VERSION="${LOCUS_VERSION:-}"

fail() {
  printf '%s\n' "$1" >&2
  exit 1
}

command -v curl >/dev/null 2>&1 || fail "需要 curl / curl is required"
command -v sha256sum >/dev/null 2>&1 || fail "需要 sha256sum / sha256sum is required"

if [ -z "$VERSION" ]; then
  VERSION=$(curl -fsSL "$BASE/latest/version" | tr -d '[:space:]')
fi

printf '%s' "$VERSION" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+(\.[0-9A-Fa-f]+)?$' \
  || fail "版本号无效 / invalid version: $VERSION"

work=$(mktemp -d)
cleanup() { rm -rf "$work"; }
trap cleanup EXIT

curl -fsSL "$BASE/$VERSION/SHA256SUMS" -o "$work/SHA256SUMS"
curl -fsSL "$BASE/$VERSION/linux-install.sh" -o "$work/linux-install.sh"
grep '  linux-install.sh$' "$work/SHA256SUMS" >"$work/check" \
  || fail "SHA256SUMS 里没有 linux-install.sh / SHA256SUMS has no linux-install.sh"
(cd "$work" && sha256sum -c check) || fail "校验失败，请重新下载 / checksum mismatch, download again"
chmod 755 "$work/linux-install.sh"

# 安装器要从自己的文件里读出内嵌的包，所以必须落在磁盘上再执行。
# 它还会用 sudo 重新执行同一个路径，这里不能在退出时删掉。
trap - EXIT
# 从管道执行时没有控制终端，/dev/tty 打不开。有终端才把向导的输入接回去。
if (: <>/dev/tty) >/dev/null 2>&1; then
  exec bash "$work/linux-install.sh" "$@" </dev/tty
fi
exec bash "$work/linux-install.sh" "$@"