From 6e3070181fadbe47511b52c12af5e1409a9a70b0 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Fri, 11 Jun 2021 21:22:21 +0200
Subject: Refactor at 4'o clock

---
 libcppbuild.cc | 176 +++++++++------------------------------------------------
 1 file changed, 27 insertions(+), 149 deletions(-)

(limited to 'libcppbuild.cc')

diff --git a/libcppbuild.cc b/libcppbuild.cc
index ddc0b66..46f1bfc 100644
--- a/libcppbuild.cc
+++ b/libcppbuild.cc
@@ -2,182 +2,60 @@
 #include <string>
 #include <filesystem>
 #include <iostream>
-#include <fstream>
-#include <regex>
 #include <utility>
-//#include <thread>
-#include <future>
 
 #include "libcppbuild.h"
+#include "task.h"
+#include "settings.h"
 
-namespace
-{
-std::string readFile(const std::string &fileName)
+int main(int argc, const char* argv[])
 {
-	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);
+	Settings settings;
+	settings.builddir = "build/foo";
+	std::filesystem::path builddir(settings.builddir);
+	std::filesystem::create_directories(builddir);
 
-	std::vector<char> bytes(fileSize);
-	ifs.read(bytes.data(), fileSize);
+	auto project = configs();
+	std::string output = builddir / project.target;
+	const auto& files = project.sources;
+	std::vector<std::string> objects;
 
-	return std::string(bytes.data(), fileSize);
-}
+	std::vector<Task> tasks;
 
-std::vector<std::string> readDeps(const std::string& depFile)
-{
-	if(!std::filesystem::exists(depFile))
+	for(const auto& file : files)
 	{
-		return {};
+		tasks.emplace_back(project, settings, file);
+		objects.push_back(tasks.back().targetFile);
 	}
 
-	auto str = readFile(depFile);
-
-	std::vector<std::string> output;
-	std::string tmp;
-	bool start{false};
-	bool in_whitespace{false};
-	for(const auto& c : str)
+	if(argc == 2 && std::string(argv[1]) == "clean")
 	{
-		if(c == '\\' || c == '\n')
-		{
-			continue;
-		}
-
-		if(c == ':')
-		{
-			start = true;
-			continue;
-		}
-
-		if(!start)
+		std::cout << "Cleaning\n";
+		//std::filesystem::remove_all(builddir);
+		for(auto& task : tasks)
 		{
-			continue;
-		}
-
-		if(c == ' ' || c == '\t')
-		{
-			if(in_whitespace)
-			{
-				continue;
-			}
-
-			if(!tmp.empty())
+			if(task.clean() != 0)
 			{
-				output.push_back(tmp);
+				return 1;
 			}
-			tmp.clear();
-			in_whitespace = true;
-		}
-		else
-		{
-			in_whitespace = false;
-			tmp += c;
 		}
-	}
-
-	if(!tmp.empty())
-	{
-		output.push_back(tmp);
-	}
-
-	return output;
-}
-} // namespace ::
 
+		std::filesystem::remove(output);
 
-
-int main(int argc, const char* argv[])
-{
-	if(argc == 2 && std::string(argv[1]) == "clean")
-	{
-		system("rm -Rf build");
 		return 0;
 	}
 
-	std::filesystem::path builddir("build/");
-	std::filesystem::create_directory(builddir);
-
-	auto project = configs();
-	std::string output = "build/" + project.target;
-	const auto& files = project.sources;
-	std::vector<std::string> objects;
-
-	std::vector<std::future<int>> tasks;
-
 	std::cout << "Building\n";
-	for(const auto& file : files)
+	// Start all tasks
+	for(auto& task : tasks)
 	{
-		auto path = std::filesystem::path(file);
-		std::string object = builddir / path.stem();
-		object += ".o";
-		objects.push_back(object);
-
-		std::string deps = builddir / path.stem();
-		deps += ".d";
-
-		if(!std::filesystem::exists(file))
-		{
-			std::cout << "Missing source file: " << file << "\n";
-			return 1;
-		}
-
-		bool recompile{false};
-
-		if(!std::filesystem::exists(object) ||
-		   !std::filesystem::exists(deps))
-		{
-			recompile = true;
-		}
-
-		if(!recompile &&
-		   std::filesystem::last_write_time(file) >
-		   std::filesystem::last_write_time(deps))
-		{
-			recompile = true;
-		}
-
-		if(!recompile)
-		{
-			auto depList = readDeps(deps);
-			for(const auto& dep : depList)
-			{
-				if(!std::filesystem::exists(dep) ||
-				   std::filesystem::last_write_time(object) <
-				   std::filesystem::last_write_time(dep))
-				{
-					recompile = true;
-					break;
-				}
-			}
-		}
-
-		if(recompile ||
-		   !std::filesystem::exists(object) ||
-		   std::filesystem::last_write_time(file) >
-		   std::filesystem::last_write_time(object))
-		{
-
-			tasks.emplace_back(
-				std::async(std::launch::async,
-				           [file, object]()
-				           {
-					           std::string compiler = "g++ -MMD -c " + file + " -o " + object;
-					           std::cout << compiler << "\n";
-					           if(system(compiler.data()))
-					           {
-						           return 1;
-					           }
-					           return 0;
-				           }));
-		}
+		task.start();
 	}
 
+	// Wait for all tasks
 	for(auto& task : tasks)
 	{
-		task.wait();
-		if(task.get() != 0)
+		if(task.wait() != 0)
 		{
 			return 1;
 		}
-- 
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