Crafter.Build/tests/ShaderDep/ShaderDep.cpp

/*
Crafter® Build
Copyright (C) 2026 Catcrafts®
Catcrafts.net

LGPL-3.0-only.

Verifies that when an executable consumes a library that registers shaders
or asset files, those runtime artifacts ship in the executable's bin dir
alongside the binary — not just in the lib's own bin dir, where the runtime
exe wouldn't find them. Covers a .spv (cfg.shaders), a flat asset
(cfg.files file), and a directory tree (cfg.files dir).

Also verifies cfg.buildFiles' include-path semantic: the consumer's own
shader compile resolves `#include "ui-shared.glsl"` against the lib's
buildFiles in-place from the dep's source tree (no copy), and the file is
NOT mirrored into any build/bin dir.
*/

import std;
import Crafter.Build;
#include "../_shared/TestUtil.h"
namespace fs = std::filesystem;
using namespace TestUtil;
using namespace Crafter;

int main() {
    try {
        fs::path src = fs::current_path() / "tests" / "ShaderDep" / "inner";
        Configuration cfg = LoadFixture("ShaderDep", src);

        auto br = BuildOnce(cfg);
        if (!br.result.empty()) {
            std::println(std::cerr, "build failed:\n{}", br.result);
            return 1;
        }

        fs::path libSpv = cfg.dependencies[0]->BinDir() / "triangle.spv";
        fs::path appSpv = cfg.BinDir() / "triangle.spv";

        if (!fs::exists(libSpv)) {
            std::println(std::cerr, "lib .spv missing at {}", libSpv.string());
            return 1;
        }
        if (!fs::exists(appSpv)) {
            std::println(std::cerr, "exe .spv missing at {}", appSpv.string());
            return 1;
        }

        std::ifstream f(appSpv, std::ios::binary);
        unsigned char magic[4] = {};
        f.read(reinterpret_cast<char*>(magic), 4);
        if (magic[0] != 0x03 || magic[1] != 0x02 || magic[2] != 0x23 || magic[3] != 0x07) {
            std::println(std::cerr,
                "SPIR-V magic mismatch in exe-side copy: got {:#04x} {:#04x} {:#04x} {:#04x}",
                magic[0], magic[1], magic[2], magic[3]);
            return 1;
        }

        fs::path appAsset = cfg.BinDir() / "asset.txt";
        if (!fs::exists(appAsset)) {
            std::println(std::cerr, "exe-side asset.txt missing at {}", appAsset.string());
            return 1;
        }
        if (ReadFile(appAsset) != "crafter-build asset\n") {
            std::println(std::cerr, "asset.txt content mismatch at {}", appAsset.string());
            return 1;
        }

        fs::path appNested = cfg.BinDir() / "data" / "nested.txt";
        if (!fs::exists(appNested)) {
            std::println(std::cerr, "exe-side data/nested.txt missing at {}", appNested.string());
            return 1;
        }
        if (ReadFile(appNested) != "nested asset\n") {
            std::println(std::cerr, "data/nested.txt content mismatch at {}", appNested.string());
            return 1;
        }

        // The consumer shader includes a header from the lib's buildFiles.
        // Successful build (above) means glslang resolved the include
        // in-place from the dep's source tree — verify the resulting .spv
        // and the SPIR-V magic, same as for the lib's shader.
        fs::path consumerSpv = cfg.BinDir() / "consumer.spv";
        if (!fs::exists(consumerSpv)) {
            std::println(std::cerr, "consumer .spv missing at {}", consumerSpv.string());
            return 1;
        }
        std::ifstream cf(consumerSpv, std::ios::binary);
        unsigned char cmagic[4] = {};
        cf.read(reinterpret_cast<char*>(cmagic), 4);
        if (cmagic[0] != 0x03 || cmagic[1] != 0x02 || cmagic[2] != 0x23 || cmagic[3] != 0x07) {
            std::println(std::cerr,
                "SPIR-V magic mismatch in consumer.spv: got {:#04x} {:#04x} {:#04x} {:#04x}",
                cmagic[0], cmagic[1], cmagic[2], cmagic[3]);
            return 1;
        }

        // buildFiles must NOT be copied anywhere — they're read in place.
        for (fs::path probe : {
                cfg.BinDir() / "ui-shared.glsl",
                cfg.BuildDir() / "ui-shared.glsl",
                cfg.dependencies[0]->BinDir() / "ui-shared.glsl",
                cfg.dependencies[0]->BuildDir() / "ui-shared.glsl",
            }) {
            if (fs::exists(probe)) {
                std::println(std::cerr, "ui-shared.glsl unexpectedly copied to {}", probe.string());
                return 1;
            }
        }

        return 0;
    } catch (const std::exception& e) {
        std::println(std::cerr, "test exception: {}", e.what());
        return 1;
    }
}