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path: root/src/CmakeModule.cpp
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#include "../include/CmakeModule.hpp"
#include "../include/Exec.hpp"
#include "../include/GlobalLib.hpp"
#include "../include/PkgConfig.hpp"

#if OS_FAMILY == OS_FAMILY_POSIX
#define nprintf printf
#else
#define nprintf wprintf
#endif

using namespace std;

namespace sibs
{
    Result<bool> CmakeModule::compile(const SibsConfig &config, const FileString &buildPath, LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc, LinkerFlagCallbackFunc dynamicLinkerFlagCallbackFunc, GlobalIncludeDirCallbackFunc globalIncludeDirCallback)
    {
        Result<FileString> globalLibDirResult = getHomeDir();
        if (!globalLibDirResult)
            return Result<bool>::Err(globalLibDirResult);
        FileString globalLibDir = globalLibDirResult.unwrap();
        globalLibDir += TINYDIR_STRING("/.sibs/lib");
        Result<bool> createGlobalLibDirResult = createDirectoryRecursive(globalLibDir.c_str());
        if(createGlobalLibDirResult.isErr())
            return createGlobalLibDirResult;
        
// TODO: This code was copied from Ninja.cpp, convert it to work for CMake
#if OS_TYPE == OS_TYPE_LINUX
        // TODO: Allow configuring default linking flags. Maybe have `package.useThreads = false` to disable this flag
        string allLinkerFlags = "-pthread";
#else
        string allLinkerFlags = "";
#endif

#if 0
        // TODO: Somehow check loading order, because it has to be correct to work.. Or does it for dynamic libraries?
        // Anyways it's required for static libraries (especially on Windows)
        for (const string &binaryDependency : binaryDependencies)
        {
            allLinkerFlags += " ";
            allLinkerFlags += binaryDependency;
        }
#endif
        if (!staticLinkerFlagCallbackFunc || (config.getPackageType() == PackageType::DYNAMIC || config.getPackageType() == PackageType::LIBRARY))
        {
            staticLinkerFlagCallbackFunc = [&allLinkerFlags](const string &linkerFlag)
            {
                allLinkerFlags += " ";
                allLinkerFlags += linkerFlag;
            };
        }

        // TODO: If project contains no source files, then we shouldn't override this function
        dynamicLinkerFlagCallbackFunc = [&allLinkerFlags](const string &linkerFlag)
        {
            allLinkerFlags += " ";
            allLinkerFlags += linkerFlag;
        };
        
        // TODO: Create a cmake module that contains library/include path for the dependencies (https://cmake.org/Wiki/CMake:How_To_Find_Libraries).
        // Modify the project CMakeLists.txt and add: list(APPEND CMAKE_MODULE_PATH "PathToDependenciesCmakeModulesGoesHere").
        // CMakeLists.txt may contain: set(CMAKE_MODULE_PATH "PathToModules"). This needs to be replaced with list append,
        // otherwise our added module path is replaced.
        // It may work to do like vcpkg instead - to use -DCMAKE_TOOLCHAIN_FILE program argument to specify path to script (https://github.com/Microsoft/vcpkg/blob/master/docs/examples/using-sqlite.md)
        vector<PackageListDependency*> globalLibDependencies;
#if OS_FAMILY == OS_FAMILY_POSIX
        vector<PackageListDependency*> pkgConfigDependencies;
        for(PackageListDependency *dependency : config.getPackageListDependencies())
        {
            Result<bool> pkgConfigDependencyValidation = PkgConfig::validatePkgConfigPackageVersionExists(dependency);
            if(pkgConfigDependencyValidation.isOk())
            {
                pkgConfigDependencies.push_back(dependency);
            }
            else
            {
                globalLibDependencies.push_back(dependency);
            }
        }

        // TODO: Use getDynamicLibsFlags instead which includes cflags?
        Result<string> pkgConfigLinkerFlagsResult = PkgConfig::getDynamicLibsLinkerFlags(pkgConfigDependencies);
        if (pkgConfigLinkerFlagsResult.isErr())
        {
            printf("%s, using global lib...\n", pkgConfigLinkerFlagsResult.getErrMsg().c_str());
            globalLibDependencies.reserve(globalLibDependencies.size() + pkgConfigDependencies.size());
            for (PackageListDependency *pkgConfigDependency : pkgConfigDependencies)
            {
                globalLibDependencies.push_back(pkgConfigDependency);
            }
            pkgConfigDependencies.clear();
        }
        else
        {
            if (!pkgConfigLinkerFlagsResult.unwrap().empty())
                dynamicLinkerFlagCallbackFunc(pkgConfigLinkerFlagsResult.unwrap());
        }
#else
        for (const Dependency &dependency : dependencies)
        {
            globalLibDependencies.push_back(dependency);
        }
#endif

        Result<bool> globalLibResult = GlobalLib::getLibs(globalLibDependencies, config, globalLibDir, staticLinkerFlagCallbackFunc, dynamicLinkerFlagCallbackFunc, globalIncludeDirCallback);
        if(!globalLibResult)
            return globalLibResult;
            
        Result<bool> createBuildDirResult = createDirectoryRecursive(buildPath.c_str());
        if (createBuildDirResult.isErr())
            return createBuildDirResult;
        
        FileString cmd = TINYDIR_STRING("cmake ");
        switch(config.getPackageType())
        {
            case PackageType::EXECUTABLE:
            {
                cmd += config.getCmakeArgs();
                break;
            }
            case PackageType::STATIC:
            {
                cmd += config.getCmakeArgsStatic();
                break;
            }
            case PackageType::DYNAMIC:
            case PackageType::LIBRARY:
            {
                cmd += config.getCmakeArgsDynamic();
                break;
            }
        }
        cmd += TINYDIR_STRING(" \"-B");
        cmd += buildPath;
        cmd += TINYDIR_STRING("\" \"-H");
        switch(config.getPackageType())
        {
            case PackageType::EXECUTABLE:
            {
                cmd += config.getCmakeDir();
                break;
            }
            case PackageType::STATIC:
            {
                cmd += config.getCmakeDirStatic();
                break;
            }
            case PackageType::DYNAMIC:
            case PackageType::LIBRARY:
            {
                cmd += config.getCmakeDirDynamic();
                break;
            }
        }
        cmd += TINYDIR_STRING("\"");
        nprintf("Compiling with cmake with arguments: %s\n", cmd.c_str());
        
        Result<ExecResult> execResult = exec(cmd.c_str(), true);
        if(execResult.isOk())
        {
            if(execResult.unwrap().exitCode != 0)
                return Result<bool>::Err(execResult.unwrap().execStdout);
        }
        else
            return Result<bool>::Err(execResult);
        
        FileString ninjaCommand = TINYDIR_STRING("ninja -C \"");
        ninjaCommand += buildPath;
        ninjaCommand += TINYDIR_STRING("\"");
        nprintf("Compiling cmake generated ninja file: %s\n", ninjaCommand.c_str());
        execResult = exec(ninjaCommand.c_str(), true);
        if(execResult.isOk())
        {
            if(execResult.unwrap().exitCode != 0)
                return Result<bool>::Err(execResult.unwrap().execStdout);
        }
        else
            return Result<bool>::Err(execResult);
        
        if(config.getPackageType() != PackageType::EXECUTABLE)
        {
            string buildPathUtf8 = toUtf8(buildPath);
            nprintf("Searching for libraries generate by cmake in build path: %s\n", buildPathUtf8.c_str());
            walkDirFilesRecursive(buildPath.c_str(), 
                [&config, &staticLinkerFlagCallbackFunc, &dynamicLinkerFlagCallbackFunc](tinydir_file *file) 
            {
                if(_tinydir_strcmp(file->extension, CONFIG_DYNAMIC_LIB_FILE_EXTENSION) == 0 || _tinydir_strcmp(file->extension, CONFIG_STATIC_LIB_FILE_EXTENSION) == 0)
                {
                    string libFileUtf8 = toUtf8(file->path);
                    nprintf("Library generated by cmake: %s\n", libFileUtf8.c_str());
                    
                    switch(config.getPackageType())
                    {
                        case PackageType::STATIC:
                        {
                            string libFileCmd = "\"";
                            libFileCmd += libFileUtf8;
                            libFileCmd += "\"";
                            staticLinkerFlagCallbackFunc(libFileCmd);
                            break;
                        }
                        case PackageType::DYNAMIC:
                        case PackageType::LIBRARY:
                        {
                            string libFileCmd = "\"";
                            libFileCmd += libFileUtf8;
                            libFileCmd += "\"";
                            dynamicLinkerFlagCallbackFunc(libFileCmd);
                            break;
                        }
                    }
                }
            });
            
            // TODO: Clean this up. The below code is indentical to code in Ninja.cpp.......
            string projectPathUtf8 = toUtf8(config.getProjectPath());
            for (const string &globalIncludeDir : config.getGlobalIncludeDirs())
            {
                string globalIncludeDirFull = projectPathUtf8;
                globalIncludeDirFull += "/";
                globalIncludeDirFull += globalIncludeDir;
                if(globalIncludeDirCallback)
                    globalIncludeDirCallback(globalIncludeDirFull);
            }
        }
        
        return Result<bool>::Ok(true);
    }
}