#!/usr/bin/env bash
# Copyright (c) 2000-2020 Synology Inc. All rights reserved.

# shellcheck source=/dev/null
source "SynoBuildConf/_env"
source "SynoBuildConf/_kconfig"

unset ARCH CROSS_COMPILE

ci_help()
{
    cat <<-EOF
Usage:
    $(basename "$0") <command>

Commands:
    config
    prepare
    check-patch
    check-sparse
    check-smatch
    check-syno-macro
    check-syno-script
    check-clang-format-diff
    build-tools
    build-ci-image
    build-btf-image
EOF
}

ci_config()
{
    cp -f "synology/synoconfigs/fst-ci-config" .config
    make olddefconfig
}

ci_prepare()
{
    [ -f ".config" ] || return 1

    make prepare
}

ci_check_sparse()
{
    env_check_command "sparse" || return

    make C=2 CHECK="$(command -v 'sparse')" -j "$(nproc)"
}

ci_check_patch()
{
    if git remote show origin &>/dev/null; then
        ./scripts/checkpatch.pl -g origin/HEAD..HEAD
    else
        ./scripts/checkpatch.pl -g HEAD~1..HEAD
    fi
}

ci_check_smatch()
{
    env_check_command "smatch" || return

    make C=2 CHECK="$(command -v 'smatch') -p=kernel" -j "$(nproc)"
}

ci_check_coccinelle()
{
    env_check_command "spatch" || return

    make coccicheck MODE=report
}

ci_check_syno_script()
{
    local _f

    env_check_command "shellcheck" || return

    while IFS= read -r _f; do
        if ! shellcheck "$_f"; then
            ERROR "'$_f' doesn't honor shellcheck"
            return 1
        fi
    done < <(find SynoBuildConf/ -regex '.*/\(gitlab-ci\|build.*\|install.*\|_.*\)';
             find synology/systemd/ -regex '.*/.*\.sh';)
}

ci_check_syno_macro()
{
    kconfig_check_syno_macro
}

ci_check_clang_format_diff()
{
    env_check_command "clang-format-diff" || return

    local _diff

    if git remote show origin &>/dev/null; then
        _diff="$(git diff -U0 --no-color origin/HEAD..HEAD | clang-format-diff -p1)"
    else
        _diff="$(git diff -U0 --no-color HEAD~1..HEAD | clang-format-diff -p1)"
    fi


    if [ -n "$_diff" ]; then
        echo "$_diff"
        return 1
    fi
}

ci_build_tools()
{
    local _tools _tool _failed

    # you need to install lots of dependency ...
    _tools="
        acpi
        bpf
        cgroup
        cpupower
        debugging
        firewire
        firmware
        freefall
        gpio
        hv
        iio
        intel-speed-select
        leds
        #liblockdep
        objtool
        pci
        perf
        #selftests
        spi
        tmon
        turbostat
        usb
        #virtio
        libapi
        vm
        wmi
        x86_energy_perf_policy
    "

    if env_detect_clang && env_detect_llvm; then
        env_enable_clang
        env_enable_llvm
        INFO "Build with LLVM/Clang"
    fi

    # FIXME: workaround for tools/bpf/runqslower bad detection
    export VMLINUX_BTF="../../../vmlinux"

    while read -r _tool; do
        [[ "$_tool" =~ ^[[:blank:]]*(#.*)?$ ]] && continue

        INFO "Build tools/$_tool"
        if ! make "tools/$_tool"; then
            _failed="$_failed $_tool"
        fi
    done <<< "$_tools"

    if [ -n "$_failed" ]; then
        ERROR "failed to build tools: $_failed"
        return 1
    fi
}

ci_build_ci_image()
{
    make olddefconfig
    make vmlinux modules -j "$(nproc)"
}

ci_build_btf_image()
{
    if env_detect_clang && env_detect_llvm; then
        env_enable_clang
        env_enable_llvm
        INFO "Build with LLVM/Clang"
    fi

    # vmlinux with BTF is required for tools/bpf
    ./scripts/config --enable CONFIG_DEBUG_INFO_BTF

    make olddefconfig
    make vmlinux modules -j "$(nproc)"
}

if [ -z "$1" ]; then
    ci_help
elif type -p "ci_${1//-/_}"; then
    cmd="${1//-/_}"; shift
    ci_"$cmd" "$@"
else
    ERROR "Command $1 not found"
fi