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#include "xmake.h"
#include <cstdlib>
#include <filesystem>
#include <iostream>
#include <sstream>
#include <stdexcept>
#include <string>
#include <vector>
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/xml_parser.hpp>
#include <boost/process.hpp>
#include <fmt/format.h>
namespace fs = std::filesystem;
namespace bp = boost::process;
namespace pt = boost::property_tree;
using namespace std::string_literals;
namespace {
const fs::path XMakefile{"XMakefile"};
void usage()
{
std::cout << "Usage: xmake <target>" << std::endl;
}
fs::path get_target(const pt::ptree& ptree) {
return ptree.get<std::string>("xmake.build.name");
}
std::vector<fs::path> get_sources(const pt::ptree& ptree) {
std::vector<fs::path> sources;
for (const pt::ptree::value_type &v: ptree.get_child("xmake.build")) {
if (v.first == "source")
sources.push_back(v.second.data());
}
return sources;
}
std::vector<fs::path> get_objects(const pt::ptree& ptree) {
std::vector<fs::path> objects{get_sources(ptree)};
for (auto &i: objects) {
i.replace_extension("o");
}
return objects;
}
// both need to exist
bool is_older(const fs::path& p, const fs::path& other) {
auto t_p{fs::last_write_time(p)};
auto t_other{fs::last_write_time(other)};
return t_p < t_other;
}
bool is_outdated(const fs::path& p, const std::vector<fs::path> &dependencies) {
if (!fs::exists(p))
return true;
for (auto& dep: dependencies) {
if (!exists(dep) || is_older(p, dep)) {
return true;
}
}
return false;
}
void build(const pt::ptree& ptree) {
fs::path target{get_target(ptree)};
std::vector<fs::path> sources{get_sources(ptree)};
std::cout << "Target: " << target << std::endl;
std::cout << "Sources: " << std::endl;
for (auto &i: sources) {
std::cout << " " << i << std::endl;
}
std::vector<std::string> commands;
// compile
for (auto &p: sources) {
fs::path p_obj{p};
p_obj.replace_extension("o");
if (is_outdated(p_obj, std::vector<fs::path>{p})) {
commands.push_back(fmt::format("g++ -std=c++17 -c {} -o {}", p.string(), p_obj.string()));
}
}
// link
std::vector<fs::path> objects{get_objects(ptree)};
std::vector<fs::path> dependencies{sources};
if (is_outdated(target, dependencies)) {
std::string link_command{"g++"};
for (auto &i: objects) {
link_command += fmt::format(" {}", i.string());
}
link_command += " -lfmt";
link_command += fmt::format(" -o {}", target.string());
commands.push_back(link_command);
}
std::cout << "Commands: " << std::endl;
for (auto &i: commands) {
std::cout << " " << i << std::endl;
}
if (commands.size() == 0) {
std::cout << "Everything up to date." << std::endl;
} else {
std::cout << "Running commands: " << std::endl;
for (auto &i: commands) {
std::cout << i << std::endl;
int result{system(i.c_str())};
if (result != 0) {
throw std::runtime_error(fmt::format("Error {}", result));
}
}
}
}
void clean(const pt::ptree& ptree) {
std::vector<fs::path> cleanlist{get_objects(ptree)};
cleanlist.push_back(get_target(ptree));
std::vector<std::string> commands;
for (auto &i: cleanlist) {
commands.push_back(fmt::format("rm -f {}", i.string()));
}
std::cout << "Running commands: " << std::endl;
for (auto &i: commands) {
std::cout << i << std::endl;
int result{system(i.c_str())};
if (result != 0) {
throw std::runtime_error(fmt::format("Error {}", result));
}
}
}
}
int xmake(int argc, char* argv[])
{
try {
pt::ptree ptree;
pt::read_xml(XMakefile, ptree, pt::xml_parser::no_comments | pt::xml_parser::trim_whitespace);
std::string action{"default"};
if (argc == 1) { // default action
} else if (argc == 2) {
action = argv[1];
} else {
std::cerr << "Invalid arguments." << std::endl;
usage;
exit(1);
}
if (action == "default"s || action == "build") { // build
build(ptree);
} else if (action == "clean") {
clean(ptree);
} else if (action == "install") {
throw std::runtime_error("unimplemented");
} else if (action == "rebuild") {
throw std::runtime_error("unimplemented");
} else if (action == "run") {
throw std::runtime_error("unimplemented");
} else {
std::cerr << "Invalid action: " << action << std::endl;
usage;
exit(1);
}
} catch (const std::exception& ex) {
std::cerr << "xmake: " << ex.what() << std::endl;
return 1;
}
return 0;
}
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