Add change config file and run config file

src/clippy/project_list.cpp

@@ -4,14 +4,72 @@
 
 #include <fstream>
 #include <mutex>
+#include <random>
+#include <chrono>
 
-#include <iostream>
+Config ProjectList::GetNewConfig(
+    const std::filesystem::path& config_directory) {
+  std::lock_guard guard(lock_file_);
 
-void ProjectList::LoadFrom(const std::string& path) {
-  utils::filesystem::LockFile lock(path);
-  std::lock_guard guard(lock);
+  LoadWithouLock();
 
-  std::ifstream in(path);
+  std::mt19937 rnd(std::chrono::system_clock::now().time_since_epoch().count());
+
+  auto RandomSymbol = [&rnd]() {
+    int n = rnd() % (26 + 26 + 10);
+    if (n < 26) {
+      return 'a' + n;
+    } else if (n < 26 + 26) {
+      return 'A' + n - 26;
+    } else {
+      return '0' + n - 26 - 26;
+    }
+  };
+
+  auto GenerateFilename = [&rnd, &RandomSymbol]() {
+    std::string filename;
+    for (size_t i = 0; i < 6; ++i) {
+      filename += RandomSymbol();
+    }
+
+    return filename;
+  };
+
+  auto filename = GenerateFilename();
+  while (true) {
+    bool exist_config = false;
+    for (auto& project : projects_) {
+      if (filename == project.configuration_file.filename()) {
+        exist_config = true;
+        break;
+      }
+    }
+    if (!exist_config) {
+      break;
+    }
+
+    filename = GenerateFilename();
+  }
+
+  auto path_to_config = config_directory / filename;
+
+  std::ofstream out(path_, std::ios::ate);
+  out << std::filesystem::current_path() << " " << path_to_config << std::endl;
+  out.close();
+
+  projects_.emplace_back(std::filesystem::current_path(), path_to_config);
+
+  return {path_to_config};
+}
+
+void ProjectList::Load() {
+  std::lock_guard guard(lock_file_);
+
+  LoadWithouLock();
+}
+
+void ProjectList::LoadWithouLock() {
+  std::ifstream in(path_);
 
   Project current;