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#include <vector>
#include <string>
#include <filesystem>
#include <iostream>
#include <utility>
#include <list>
#include <chrono>
#include <thread>
#include "libcppbuild.h"
#include "task.h"
#include "settings.h"
#include <unistd.h>
using namespace std::chrono_literals;
int main(int argc, const char* argv[])
{
Settings settings;
// TODO: Set from commandline
settings.builddir = "build/foo";
settings.parallel_processes =
std::max(1u, std::thread::hardware_concurrency() * 3);
std::filesystem::path builddir(settings.builddir);
std::filesystem::create_directories(builddir);
auto config = configs();
std::string output = builddir / config.target;
const auto& files = config.sources;
std::vector<std::string> objects;
std::vector<Task> tasks;
for(const auto& file : files)
{
tasks.emplace_back(config, settings, file);
objects.push_back(tasks.back().target());
}
if(argc == 2 && std::string(argv[1]) == "clean")
{
std::cout << "Cleaning\n";
//std::filesystem::remove_all(builddir);
for(auto& task : tasks)
{
if(task.clean() != 0)
{
return 1;
}
}
std::filesystem::remove(output);
return 0;
}
std::cout << "Building\n";
std::list<std::future<int>> processes;
// Start all tasks
auto task = tasks.begin();
while(task != tasks.end())
{
while(processes.size() < settings.parallel_processes &&
task != tasks.end())
{
if(!task->dirty())
{
++task;
continue;
}
processes.emplace_back(
std::async(std::launch::async,
[task]()
{
return task->run();
}));
++task;
std::this_thread::sleep_for(10ms);
}
for(auto process = processes.begin();
process != processes.end();
++process)
{
if(process->valid())
{
if(process->get() != 0)
{
return 1;
}
processes.erase(process);
break;
}
}
std::this_thread::sleep_for(10ms);
}
for(auto process = processes.begin();
process != processes.end();
++process)
{
process->wait();
if(process->get() != 0)
{
return 1;
}
}
std::cout << "Linking\n";
bool dolink{false};
if(!std::filesystem::exists(output))
{
dolink = true;
}
else
{
for(const auto& object : objects)
{
if(std::filesystem::last_write_time(output) <=
std::filesystem::last_write_time(object))
{
dolink = true;
break;
}
}
}
if(!dolink)
{
std::cout << "No linking needed\n";
return 0;
}
std::string objectlist;
for(const auto& object : objects)
{
objectlist += object + " ";
}
std::string compiler = "g++ " + objectlist + " " +
config.ldflags + " " +
"-o " + output;
std::cout << compiler << "\n";
if(system(compiler.data()))
{
return 1;
}
return 0;
}
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