From 752e7c7bbd98f79c123784e5fb40b279d10f82a9 Mon Sep 17 00:00:00 2001
From: Raimon Zamora <jaildoctor@gmail.com>
Date: Mon, 30 Sep 2024 11:11:42 +0200
Subject: [PATCH] - First commit

---
 .gitignore    |   2 +
 lagueirtofile |   5 +
 main.cpp      | 252 ++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 259 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 lagueirtofile
 create mode 100644 main.cpp

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..66a4031
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+lagueirto
+.vscode/*
diff --git a/lagueirtofile b/lagueirtofile
new file mode 100644
index 0000000..712f892
--- /dev/null
+++ b/lagueirtofile
@@ -0,0 +1,5 @@
+libs = -lSDL2 -lSDL2_mixer
+cppflags = -D DEBUG -g
+executable = thepool_debug
+sourcepath = source
+buildpath = build
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..9a2bfb8
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,252 @@
+#include <string>
+#include <iostream>
+#include <filesystem>
+#include <vector>
+#include <chrono>
+
+#include <string.h>
+
+std::string libs = "";
+std::string cppflags = "";
+std::string executable = "out";
+std::string source_path = "";
+std::string build_path = "";
+
+std::vector<std::string> keys = {"libs", "cppflags", "executable", "sourcepath", "buildpath"};
+enum tokens {LIBS, CPPFLAGS, EXECUTABLE, SOURCEPATH, BUILDPATH};
+
+char *getBufferFromFile(const char* filename)
+{
+    FILE *f = fopen(filename, "rb");
+    fseek(f, 0, SEEK_END);
+    long size = ftell(f);
+    fseek(f, 0, SEEK_SET);
+    char *buffer = (char*)malloc(size+1);
+    fread(buffer, size, 1, f);
+    buffer[size] = 0;
+    return buffer;
+}
+
+#define IGNOREWHITESPACE while (*p!=0 && *p <= 32) { p++; }
+void loadLagueirtoFile()
+{
+    char *buffer = getBufferFromFile("lagueirtofile");
+    char *p = buffer;
+    char token[255];
+    while (*p!=0)
+    {
+        IGNOREWHITESPACE;  // Ignore whitespace
+        int i=0;
+        while (*p>32 && *p!='=') { token[i]=*p; i++; p++; }
+        IGNOREWHITESPACE
+        if (*p=='=')
+        {
+            token[i]=0;
+            int tokennum = -1;
+            for (int j=0;j<keys.size();++j) if (keys[j]==token) tokennum = j;
+            if (tokennum!=-1)
+            {
+                p++;
+                IGNOREWHITESPACE
+                i=0;
+                while (*p!='\r' && *p!='\n' && *p!=0) { token[i]=*p; i++; p++; }
+                token[i]=0;
+                switch (tokennum)
+                {
+                    case LIBS:
+                        libs = token;
+                        std::cout << "LIBS: " << libs << std::endl;
+                        break;
+                    case CPPFLAGS:
+                        cppflags = token;
+                        std::cout << "CPPFLAGS: " << cppflags << std::endl;
+                        break;
+                    case EXECUTABLE:
+                        executable = token;
+                        std::cout << "EXECUTABLE: " << executable << std::endl;
+                        break;
+                    case SOURCEPATH:
+                        source_path = token;
+                        std::cout << "SOURCEPATH: " << source_path << std::endl;
+                        break;
+                    case BUILDPATH:
+                        build_path = token;
+                        std::cout << "BUILDPATH: " << build_path << std::endl;
+                        break;
+                }
+            }
+        }
+    }
+    free(buffer);
+}
+
+std::string getFileExtension(std::string path)
+{
+    std::size_t dotpos = path.find_last_of(".");
+    return dotpos <= 0 ? "" : path.substr(dotpos + 1);
+}
+
+std::string getFileNameWithoutExtension(std::string path)
+{
+    std::size_t slashpos = path.find_last_of("/");
+    std::string filename = path.substr(slashpos+1);
+
+    std::size_t dotpos = filename.find_last_of(".");
+    if (dotpos <= 0) return filename;
+
+    return filename.substr(0, dotpos);
+}
+
+
+const bool textFound(char *buffer, const char *text)
+{
+    const int strsize = strlen(text);
+    int i = 0;
+    bool equal=true;
+    while (equal && i<strsize)
+    {
+        if (buffer[i]!=text[i]) equal = false;
+        ++i;
+    }
+    return equal;
+}
+
+
+std::vector<std::string> getIncludes(std::string filename)
+{
+    char *buffer = getBufferFromFile(filename.c_str());
+
+    std::vector<std::string> includes;
+
+    char *p = buffer;
+    while (*p != 0)
+    {
+        if (*p=='#')
+        {
+            if (textFound(buffer, "#include"))
+            {
+                p+=8;
+                while(strchr(" \t", *p)) p++;   // Ignore whitespace (spaces and tabs)
+                if (*p == '"')
+                {
+                    p++;
+                    char *p2 = p;
+                    while (*p2!='"' && *p2!=0 ) p2++;
+                    if (*p2!=0) {
+                        *p2=0;
+                        includes.push_back(std::string(p));
+                        p = p2+1;
+                    }
+                }
+            }
+        }
+        p++;
+    }
+    
+    free(buffer);
+    return includes;
+}
+
+int main()
+{
+    loadLagueirtoFile();
+    bool must_link = false;
+    if (!std::filesystem::is_directory(source_path))
+    {
+        std::cout << "ERROR: Directory '" << source_path <<"' does not exists." << std::endl;
+        exit(1);
+    }
+
+    std::chrono::steady_clock::time_point begin_all = std::chrono::steady_clock::now();
+
+    if (!std::filesystem::is_directory(build_path))
+    {
+        std::filesystem::create_directory(build_path);
+    }
+
+    std::string path = "./" + source_path;
+    for (const auto & entry : std::filesystem::directory_iterator(path))
+    {
+        std::string source_file = entry.path();
+        if (getFileExtension(source_file)=="cpp")
+        {
+            bool must_recompile = false;
+            std::string object_file = build_path + "/" + getFileNameWithoutExtension(source_file)+".o";
+
+            // si el objecte no existeix, fa falta recompilar
+            if (!std::filesystem::exists(object_file))
+            {
+                must_recompile = true;
+                //std::cout << "'" << object_file << "' No existeix. ";
+
+            }
+            else
+            {
+                // Si sí que existeix, agafem la data de modificació
+                auto object_file_write_time = std::filesystem::last_write_time(object_file);
+                
+                // Si la data de modificació del cpp es major que la del objecte, fa falta recompilar
+                auto source_file_write_time = std::filesystem::last_write_time(source_file);
+                if (source_file_write_time > object_file_write_time)
+                {
+                    //std::cout << "'" << source_file << "' es més nou. ";
+                    must_recompile = true;
+                }
+                else
+                {
+                    // Sino, mirem els includes
+                    auto include_files = getIncludes(source_file);
+                    for (auto include : include_files)
+                    {
+                        std::string include_file = source_path + "/" + include;
+                        if (!std::filesystem::exists(include_file))
+                        {
+                            std::cout << "WARNING: Include file '" << include_file << "' not found." << std::endl;
+                        }
+                        else
+                        {
+                            auto include_file_write_time = std::filesystem::last_write_time(include_file);
+                            if (include_file_write_time > object_file_write_time)
+                            {
+                                //std::cout << "El include '" << include_file << "' es més nou. ";
+                                must_recompile = true;
+                                break;
+                            }
+                        }
+                    }
+
+                }
+            }
+            if (must_recompile)
+            {
+                must_link = true;
+                //std::cout << object_file << " s'ha de reompilar" << std::endl;
+                std::string command = "g++ " + source_file + " " + cppflags + " -c -o " + object_file;
+                std::cout << command << std::endl;
+
+                std::chrono::steady_clock::time_point begin = std::chrono::steady_clock::now();
+                system(command.c_str());
+                std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();
+                float t = float(std::chrono::duration_cast<std::chrono::microseconds>(end - begin).count())/1000000;
+                std::cout << "(" << t << " seconds)" << std::endl;
+            }
+            else
+            {
+                //std::cout << object_file << " està actualitzat" << std::endl;
+            }
+        }
+    }
+    if (must_link)
+    {
+        std::string command = "g++ " + build_path + "/*.o " + libs + " -o " + executable;
+        std::cout << command << std::endl;
+        system(command.c_str());
+        std::chrono::steady_clock::time_point end_all = std::chrono::steady_clock::now();
+        float t = float(std::chrono::duration_cast<std::chrono::microseconds>(end_all - begin_all).count())/1000000;
+        std::cout << "(" << t << " seconds)" << std::endl;
+    }
+    else
+    {
+        std::cout << "Everything is up to date. Nothing to do." << std::endl;
+    }
+}
\ No newline at end of file