//--------------------------------------------------------------------------------------------------
static void BuildAndBundleComponent
(
legato::Component& component,
ComponentBuilder_t componentBuilder,
const std::string& appWorkingDir
)
//--------------------------------------------------------------------------------------------------
{
if (component.IsBuilt() == false)
{
// Do sub-components first.
for (auto& mapEntry : component.SubComponents())
{
auto subComponentPtr = mapEntry.second;
BuildAndBundleComponent(*subComponentPtr, componentBuilder, appWorkingDir);
}
// Each component gets its own object file dir.
std::string objOutputDir = legato::CombinePath(appWorkingDir,
"component/" + component.Name());
// Build the component.
// NOTE: This will detect if the component doesn't actually need to be built, either because
// it doesn't have any source files that need to be compiled, or because they have
// already been compiled.
componentBuilder.Build(component, objOutputDir);
// Copy all the bundled files and directories from the component into the staging area.
componentBuilder.Bundle(component);
}
}
//--------------------------------------------------------------------------------------------------
void GetComponentLibLinkDirectives
(
std::ostream& outputStream,
const legato::Component& component
)
//--------------------------------------------------------------------------------------------------
{
// Link with required libraries.
for (auto lib : component.RequiredLibs())
{
outputStream << " -l" << lib;
}
// Link with bundled libraries.
for (auto lib : component.BundledLibs())
{
mk::GetLinkDirectiveForLibrary(outputStream, lib);
}
// For each sub-component,
for (const auto& mapEntry : component.SubComponents())
{
auto componentPtr = mapEntry.second;
// If the component has itself been built into a library, link with that.
if (componentPtr->Lib().Exists())
{
outputStream << " -l" << componentPtr->Lib().ShortName();
}
// Link with whatever this component depends on, bundles, or requires.
GetComponentLibLinkDirectives(outputStream, *componentPtr);
}
}
//--------------------------------------------------------------------------------------------------
static void BuildStandAlone
(
void
)
//--------------------------------------------------------------------------------------------------
{
// Create an Interface Builder object.
InterfaceBuilder_t interfaceBuilder(BuildParams);
// Build the IPC API libs.
for (auto& mapEntry : Component.ProvidedApis())
{
auto& interface = mapEntry.second;
// We want the generated code and other intermediate output files to go into a separate
// interface-specific directory to avoid confusion.
interfaceBuilder.Build(interface, legato::CombinePath(BuildParams.ObjOutputDir(),
interface.InternalName()));
// Add the interface instance library to the list of libraries to link the component
// library with.
Component.AddRequiredLib(interface.Lib().ShortName());
}
for (auto& mapEntry : Component.RequiredApis())
{
auto& interface = mapEntry.second;
if (!interface.TypesOnly()) // If only using types, don't need a library.
{
// We want the generated code and other intermediate output files to go into a separate
// interface-specific directory to avoid confusion.
interfaceBuilder.Build(interface, legato::CombinePath(BuildParams.ObjOutputDir(),
interface.InternalName()));
// Add the interface instance library to the list of libraries to link the component
// library with.
Component.AddRequiredLib(interface.Lib().ShortName());
}
}
// Build the component library.
Build();
}
//--------------------------------------------------------------------------------------------------
static void GetCommandLineArgs
(
int argc,
const char** argv
)
//--------------------------------------------------------------------------------------------------
{
// The target device (e.g., "ar7").
std::string target = "localhost";
// Non-zero = say what we are doing on stdout.
bool isVerbose = false;
// Full path of the library file to be generated. "" = use default file name.
std::string buildOutputPath = "";
// Path to the directory where generated runtime libs should be put.
std::string libOutputDir = ".";
// Path to the directory where intermediate build output files (such as generated
// source code and object code files) should be put.
std::string objOutputDir = ".";
std::string cFlags; // C compiler flags.
std::string cxxFlags; // C++ compiler flags.
std::string ldFlags; // Linker flags.
// Lambda function that gets called once for each occurence of the --cflags (or -C)
// argument on the command line.
auto cFlagsPush = [&](const char* arg) { cFlags += " "; cFlags += arg; };
// Lambda function that gets called for each occurence of the --cxxflags, (or -X) argument on
// the command line.
auto cxxFlagsPush = [&](const char* arg) { cxxFlags += " "; cxxFlags += arg; };
// Lambda function that gets called once for each occurence of the --ldflags (or -L)
// argument on the command line.
auto ldFlagsPush = [&](const char* arg) { ldFlags += " "; ldFlags += arg; };
// Lambda functions for handling arguments that can appear more than once on the
// command line.
auto interfaceDirPush = [&](const char* path)
{
BuildParams.AddInterfaceDir(path);
};
auto sourceDirPush = [&](const char* path)
{
BuildParams.AddSourceDir(path);
};
// Lambda function that gets called once for each occurence of a component path on the
// command line.
auto componentPathSet = [&](const char* param)
{
static bool matched = false;
if (matched)
{
throw legato::Exception("Only one component allowed. First is '" + Component.Path()
+ "'. Second is '" + param + "'.");
}
matched = true;
Component.Path(param);
};
// Register all our arguments with the argument parser.
le_arg_AddOptionalString(&buildOutputPath,
"",
'o',
"output-path",
"Specify the complete path name of the component library to be built.");
le_arg_AddOptionalString(&libOutputDir,
".",
'l',
"lib-output-dir",
"Specify the directory into which any generated runtime libraries"
" should be put. (This option ignored if -o specified.)");
le_arg_AddOptionalString(&objOutputDir,
"./_build",
'w',
"object-dir",
"Specify the directory into which any intermediate build artifacts"
" (such as .o files and generated source code files) should be put.");
le_arg_AddOptionalString(&target,
"localhost",
't',
"target",
"Specify the target device to build for (localhost | ar7).");
le_arg_AddMultipleString('i',
"interface-search",
"Add a directory to the interface search path.",
interfaceDirPush);
le_arg_AddMultipleString('c',
"component-search",
"(DEPRECATED) Add a directory to the source search path (same as -s).",
sourceDirPush);
le_arg_AddMultipleString('s',
"source-search",
"Add a directory to the source search path.",
sourceDirPush);
le_arg_AddOptionalFlag(&isVerbose,
'v',
"verbose",
"Set into verbose mode for extra diagnostic information.");
le_arg_AddMultipleString('C',
"cflags",
"Specify extra flags to be passed to the C compiler.",
cFlagsPush);
le_arg_AddMultipleString('X',
"cxxflags",
"Specify extra flags to be passed to the C++ compiler.",
cxxFlagsPush);
le_arg_AddMultipleString('L',
"ldflags",
"Specify extra flags to be passed to the linker when linking "
"executables.",
ldFlagsPush);
le_arg_AddOptionalFlag(&IsStandAlone,
'a',
"stand-alone",
"Create IPC interface instance libraries for APIs required by"
" the component and link the component library with those interface"
" libraries, so that the component library can be loaded and run"
" without the help of mkexe or mkapp. This is useful when integrating"
" with third-party code that uses some other build system." );
// Any remaining parameters on the command-line are treated as a component path.
// Note: there should only be one.
le_arg_SetLooseParamHandler(componentPathSet);
// Scan the arguments now.
le_arg_Scan(argc, argv);
// Were we given a component?
if (Component.Name() == "")
{
throw std::runtime_error("A component must be supplied on the command line.");
}
// Add the current working directory to the list of source search directories and the
// list of interface search directories.
BuildParams.AddSourceDir(".");
BuildParams.AddInterfaceDir(".");
// Store other build params specified on the command-line.
if (isVerbose)
{
BuildParams.SetVerbose();
}
BuildParams.SetTarget(target);
BuildParams.LibOutputDir(libOutputDir);
BuildParams.ObjOutputDir(objOutputDir);
BuildParams.CCompilerFlags(cFlags);
BuildParams.CxxCompilerFlags(cxxFlags);
BuildParams.LinkerFlags(ldFlags);
if (buildOutputPath != "")
{
Component.Lib().BuildOutputPath(buildOutputPath);
}
}
//--------------------------------------------------------------------------------------------------
void ComponentBuilder_t::GenerateInterfaceCode
(
legato::Component& component
)
//--------------------------------------------------------------------------------------------------
{
// Don't do anything if the component doesn't import or export any interfaces.
if (component.ImportedInterfaces().empty() && component.ExportedInterfaces().empty())
{
return;
}
// Generate the path to the directory in which the generated files will go.
std::string dirPath = m_Params.ObjOutputDir()
+ "/components/"
+ component.Name();
if (m_Params.IsVerbose())
{
std::cout << "Generating interface code for '" << component.Name()
<< "' in directory '" << dirPath << "'." << std::endl;
}
// Make sure the directory exists.
legato::MakeDir(dirPath);
// Open the interface.h file for writing.
std::string interfacesHeaderFilePath = legato::CombinePath(dirPath, "interfaces.h");
std::ofstream interfaceHeaderFile(interfacesHeaderFilePath, std::ofstream::trunc);
if (!interfaceHeaderFile.is_open())
{
throw legato::Exception("Failed to open file '" + interfacesHeaderFilePath + "'.");
}
// For each interface imported by the component, generate the client-side IPC code.
const auto& importMap = component.ImportedInterfaces();
for (auto i = importMap.cbegin(); i != importMap.cend(); i++)
{
const legato::ImportedInterface& interface = std::get<1>(*i);
if (m_Params.IsVerbose())
{
std::cout << " Generating code for imported interface '" << interface.InstanceName()
<< "'." << std::endl;
}
mk::GenerateApiClientCode(interface.InstanceName(),
interface.ApiFilePath(),
dirPath,
m_Params.IsVerbose());
// Add the generated code to the component.
std::string cFilePath(legato::AbsolutePath(legato::CombinePath(dirPath,
interface.InstanceName()
+ "_client.c")));
component.AddSourceFile(cFilePath);
// Add the interface code's header to the component's interface.h file.
interfaceHeaderFile << "#include \"" << interface.InstanceName() << "_interface.h" << "\""
<< std::endl;
}
// For each interface exported by the component, generate the server-side IPC code.
const auto& exportMap = component.ExportedInterfaces();
for (auto i = exportMap.cbegin(); i != exportMap.cend(); i++)
{
const legato::Interface& interface = std::get<1>(*i);
if (m_Params.IsVerbose())
{
std::cout << " Generating code for exported interface '" << interface.InstanceName()
<< "'." << std::endl;
}
mk::GenerateApiServerCode(interface.InstanceName(),
interface.ApiFilePath(),
dirPath,
m_Params.IsVerbose());
// Add the generated code to the component.
std::string cFilePath(legato::AbsolutePath(legato::CombinePath(dirPath,
interface.InstanceName()
+ "_server.c")));
component.AddSourceFile(cFilePath);
// Add the interface code's header to the component's interface.h file.
interfaceHeaderFile << "#include \"" << interface.InstanceName() << "_server.h" << "\""
<< std::endl;
}
// Add the directory to the include search path so the compiler can find the "interface.h" file.
component.AddIncludeDir(dirPath);
}
//--------------------------------------------------------------------------------------------------
void ComponentBuilder_t::Build
(
const legato::Component& component ///< The component whose library is to be built.
)
//--------------------------------------------------------------------------------------------------
{
// Essentially, when we build a component, we use gcc to build a library (.so) from a bunch
// of C source code files. The library goes into the component's library output directory.
// TODO: Check if files need recompiling. Maybe change to use intermediate .o files
// to break up compiling so it runs faster for large components that have had
// only small changes to them.
std::stringstream commandLine;
commandLine << mk::GetCompilerPath(m_Params.Target());
// Specify the output file path.
// TODO: Add a version number to the library.
std::string libPath = m_Params.LibOutputDir() + "/lib" + component.Name() + ".so";
if (m_Params.IsVerbose())
{
std::cout << "Building component library '" << libPath << "'." << std::endl;
}
commandLine << " -o " << libPath
<< " -shared"
<< " -fPIC"
<< " -Wall"
<< " -Werror";
// Add the include paths specified on the command-line.
for (auto i : m_Params.InterfaceDirs())
{
commandLine << " -I" << i;
}
// Add the include paths specific to the component.
for (auto i : component.IncludePath())
{
commandLine << " -I" << i;
}
// Define the component name, log session variable, and log filter variable.
commandLine << " -DLEGATO_COMPONENT=" << component.CName();
commandLine << " -DLE_LOG_SESSION=" << component.Name() << "_LogSession ";
commandLine << " -DLE_LOG_LEVEL_FILTER_PTR=" << component.Name() << "_LogLevelFilterPtr ";
// Define the COMPONENT_INIT.
commandLine << " \"-DCOMPONENT_INIT=void " << mk::GetComponentInitName(component) << "()\"";
// Add the CFLAGS to the command-line.
commandLine << " " << m_Params.CCompilerFlags();
// Add the list of C source code files.
if (component.CSourcesList().empty())
{
throw legato::Exception("Component '" + component.Name() + "' has no source files.");
}
for (const auto& sourceFile : component.CSourcesList())
{
commandLine << " \"" ;
if ((component.Path() != "") && (!legato::IsAbsolutePath(sourceFile)))
{
commandLine << component.Path() << "/" << sourceFile;
}
else
{
commandLine << sourceFile;
}
commandLine << "\"" ;
}
// Run the command.
if (m_Params.IsVerbose())
{
std::cout << commandLine.str() << std::endl;
}
mk::ExecuteCommandLine(commandLine);
}