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#include "task_ld.h"
#include <iostream>
#include <fstream>
#include "libcppbuild.h"
#include "settings.h"
#include "execute.h"
namespace
{
std::string readFile(const std::string &fileName)
{
std::ifstream ifs(fileName.c_str(), std::ios::in | std::ios::binary | std::ios::ate);
std::ifstream::pos_type fileSize = ifs.tellg();
ifs.seekg(0, std::ios::beg);
std::vector<char> bytes(fileSize);
ifs.read(bytes.data(), fileSize);
return std::string(bytes.data(), fileSize);
}
} // namespace ::
TaskLD::TaskLD(const BuildConfiguration& config,
const Settings& settings,
const std::string& target,
const std::vector<std::string>& objects)
: config(config)
, settings(settings)
{
targetFile = settings.builddir;
targetFile /= target;
for(const auto& object : objects)
{
std::filesystem::path objectFile = object;
objectFiles.push_back(objectFile);
}
flagsFile = settings.builddir / targetFile.stem();
flagsFile += ".flags";
}
bool TaskLD::dirty()
{
if(!std::filesystem::exists(targetFile))
{
return true;
}
if(!std::filesystem::exists(flagsFile))
{
return true;
}
for(const auto& objectFile : objectFiles)
{
if(std::filesystem::last_write_time(targetFile) <=
std::filesystem::last_write_time(objectFile))
{
return true;
}
}
{
auto lastFlags = readFile(flagsFile);
if(flagsString() != lastFlags)
{
//std::cout << "The compiler flags changed\n";
return true;
}
}
return false;
}
int TaskLD::run()
{
std::string objectlist;
for(const auto& objectFile : objectFiles)
{
if(!objectlist.empty())
{
objectlist += " ";
}
objectlist += std::string(objectFile);
}
std::vector<std::string> args;
for(const auto& objectFile : objectFiles)
{
args.push_back(std::string(objectFile));
}
for(const auto& flag : config.ldflags)
{
args.push_back(flag);
}
args.push_back("-o");
args.push_back(std::string(targetFile));
{ // Write flags to file.
std::ofstream flagsStream(flagsFile);
flagsStream << flagsString();
}
return execute("/usr/bin/g++", args);
}
int TaskLD::clean()
{
if(std::filesystem::exists(targetFile))
{
std::cout << "Removing " << std::string(targetFile) << "\n";
std::filesystem::remove(targetFile);
}
if(std::filesystem::exists(flagsFile))
{
std::cout << "Removing " << std::string(flagsFile) << "\n";
std::filesystem::remove(flagsFile);
}
return 0;
}
std::vector<std::string> TaskLD::depends() const
{
return {};
}
std::string TaskLD::target() const
{
return std::string(targetFile);
}
std::string TaskLD::flagsString() const
{
std::string flagsStr;
for(const auto& flag : config.ldflags)
{
if(!flagsStr.empty())
{
flagsStr += " ";
}
flagsStr += flag;
}
return flagsStr;
}
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