#!/usr/bin/env bash
set -euo pipefail

repo_root="$(cd "$(dirname "$0")/.." && pwd)"
output_dir="${OUTPUT_DIR:-$repo_root/build}"
zig_bin="${ZIG_BIN:-zig}"

if ! command -v "$zig_bin" >/dev/null 2>&1; then
    echo "Zig not found. Set ZIG_BIN=/absolute/path/to/zig." >&2
    exit 1
fi

mkdir -p "$output_dir"
echo "Using: $($zig_bin version)"

"$zig_bin" cc \
    -target arm-linux-musleabi \
    -static -O0 -marm -pthread -fno-stack-protector \
    -I"$repo_root/src/exploit/stub" \
    -I"$repo_root/src/exploit/common" \
    -I"$repo_root/src/exploit/expIov" \
    "$repo_root/src/exploit/root-main.c" \
    "$repo_root/src/exploit/expIov/iov_exp_main.c" \
    "$repo_root/src/exploit/common/kallsyms.c" \
    "$repo_root/src/exploit/common/exp_sys_call.c" \
    "$repo_root/src/exploit/common/getroot.c" \
    -o "$output_dir/hp-slate7-cve-2015-1805-root"

"$zig_bin" cc \
    -target arm-linux-musleabi \
    -static -Os -marm -s \
    "$repo_root/src/installer/install-root.c" \
    -o "$output_dir/hp-slate7-install-root"

"$zig_bin" cc \
    -target arm-linux-musleabi \
    -static -nostdlib -Wl,-e,_start -Wl,--build-id=none -s \
    "$repo_root/src/su/rootsh.S" \
    -o "$output_dir/hp-slate7-su"

chmod 755 "$output_dir"/hp-slate7-*

if command -v shasum >/dev/null 2>&1; then
    shasum -a 256 "$output_dir"/hp-slate7-*
else
    sha256sum "$output_dir"/hp-slate7-*
fi