When generate CMakeLists.txt files with some libraries like fontconfig or zlib, they add the 'module' prefix in find_package().

[steveriemannx]

When some libraries like fontconfig or zlib generate CMakeLists.txt files, they add the 'module' prefix in find_package(). Some errors:

CMake Error at CMakeLists.txt:18 (find_package):
  By not providing "Findmodule-ZLIB.cmake" in CMAKE_MODULE_PATH this project
  has asked CMake to find a package configuration file provided by
  "module-ZLIB", but CMake did not find one.

  Could not find a package configuration file provided by "module-ZLIB" with
  any of the following names:

    module-ZLIBConfig.cmake
    module-zlib-config.cmake

  Add the installation prefix of "module-ZLIB" to CMAKE_PREFIX_PATH or set
  "module-ZLIB_DIR" to a directory containing one of the above files.  If
  "module-ZLIB" provides a separate development package or SDK, be sure it
  has been installed.


-- Configuring incomplete, errors occurred!
          error config cmake failed

This is the content in toml file

[package]
name = "learning"
version = "0.1.0"
std = 20

[dependencies]
zlib = "1.3.1"

This is the content in CMakeList.txt when running "cppship run"

# Package finders
find_package(module-ZLIB REQUIRED)

When running "cppship cmake" to generate CMakeLists.txt, the problems also appears. If I delete the "module" prefix, it can be build and run well.

How to fix the bug?

This is the main.cpp example content.

#include <iostream>
#include <string>
#include <zlib.h>

// 简单封装一下，方便调用
std::string compress_string(const std::string& str)
{
    z_stream zs{};
    zs.zalloc = Z_NULL;
    zs.zfree  = Z_NULL;
    zs.opaque = Z_NULL;

    // 推荐用 ZLIB_DEFAULT_COMPRESSION，或者 1~9 自定义级别
    if (deflateInit(&zs, Z_BEST_COMPRESSION) != Z_OK) {
        throw std::runtime_error("deflateInit failed");
    }

    zs.next_in  = (Bytef*)str.data();
    zs.avail_in = (uInt)str.size();

    int ret;
    char outbuffer[32768];
    std::string outstring;

    do {
        zs.next_out  = (Bytef*)outbuffer;
        zs.avail_out = sizeof(outbuffer);

        ret = deflate(&zs, Z_FINISH);

        if (outstring.size() < zs.total_out) {
            outstring.append(outbuffer, zs.total_out - outstring.size());
        }
    } while (ret == Z_OK);

    deflateEnd(&zs);

    if (ret != Z_STREAM_END) {
        throw std::runtime_error("deflate failed");
    }

    return outstring;
}

std::string decompress_string(const std::string& str)
{
    z_stream zs{};
    zs.zalloc = Z_NULL;
    zs.zfree  = Z_NULL;
    zs.opaque = Z_NULL;

    if (inflateInit(&zs) != Z_OK) {
        throw std::runtime_error("inflateInit failed");
    }

    zs.next_in  = (Bytef*)str.data();
    zs.avail_in = (uInt)str.size();

    int ret;
    char outbuffer[32768];
    std::string outstring;

    do {
        zs.next_out  = (Bytef*)outbuffer;
        zs.avail_out = sizeof(outbuffer);

        ret = inflate(&zs, Z_NO_FLUSH);

        if (outstring.size() < zs.total_out) {
            outstring.append(outbuffer, zs.total_out - outstring.size());
        }
    } while (ret == Z_OK);

    inflateEnd(&zs);

    if (ret != Z_STREAM_END) {
        throw std::runtime_error("inflate failed");
    }

    return outstring;
}

int main()
{
    std::string original = R"(Hello zlib!
这是一个超长测试字符串，重复很多很多很多很多很多很多很多很多很多很多很多很多很多很多很多很多很多很多很多很多很多很多次！
用来验证压缩率是否真的很高。)";

    std::cout << "原始大小: " << original.size() << " 字节\n";

    auto compressed = compress_string(original);
    std::cout << "压缩后: " << compressed.size() << " 字节 ("
              << 100.0 * compressed.size() / original.size() << "%)\n";

    auto decompressed = decompress_string(compressed);
    std::cout << "解压后大小: " << decompressed.size() << " 字节\n";
    std::cout << "解压是否一致: " << (original == decompressed ? "YES" : "NO") << "\n\n";

    std::cout << "原文预览:\n" << original << "\n";
    return 0;
}

[steveriemannx]

Genimi 3 pro thinking edition gives the answer to fix the bug and it works.

fix the cppship/lib/cmake/generator.cpp file.

#include <string_view> // 确保包含此头文件

void CmakeGenerator::emit_package_finders_()
{
    mOut << "\n# Package finders\n";

    for (const auto& dep : mDeps) {
        // --- 修改开始 ---
        std::string_view pkg_name = dep.cmake_package;
        if (pkg_name.starts_with("module-")) {
            pkg_name.remove_prefix(7); // 移除 "module-" (长度为7)
        }
        mOut << fmt::format("find_package({} REQUIRED)\n", pkg_name);
        // --- 修改结束 ---
    }

    if (!mDeps.empty()) {
        mOut << '\n';
    }

    mOut << fmt::format("add_library({}_deps INTERFACE)\n", mName);

    for (const auto& dep : mDeps) {
        mOut << fmt::format(
            "target_link_libraries({}_deps INTERFACE {})\n", mName, boost::join(dep.cmake_targets, " "));
    }

    mDeps = {
        {
            .cmake_package = "",
            .cmake_targets = { fmt::format("{}_deps", mName) },
        },
    };
}

void CmakeGenerator::emit_dev_package_finders_()
{
    mOut << "\n# Dev Package finders\n";

    for (const auto& dep : mDevDeps) {
        // --- 修改开始 ---
        std::string_view pkg_name = dep.cmake_package;
        if (pkg_name.starts_with("module-")) {
            pkg_name.remove_prefix(7); // 移除 "module-"
        }
        mOut << fmt::format("find_package({} REQUIRED)\n", pkg_name);
        // --- 修改结束 ---
    }

    if (!mDevDeps.empty()) {
        mOut << '\n';
    }

    mOut << fmt::format("add_library({}_dev_deps INTERFACE)\n", mName);

    for (const auto& dep : concat(mDeps, mDevDeps)) {
        mOut << fmt::format(
            "target_link_libraries({}_dev_deps INTERFACE {})\n", mName, boost::join(dep.cmake_targets, " "));
    }

    mDevDeps = {
        {
            .cmake_package = "",
            .cmake_targets = { fmt::format("{}_dev_deps", mName) },
        },
    };
}