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Very simple and minimal todo list CLI.
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| #include <iostream> | |
| #include <fstream> | |
| #include <string> | |
| #include <cstring> | |
| /* Installation: | |
| * Compile from source: g++ todo.cpp -o todo -O3 | |
| * Put it into path: sudo mv ./todo /usr/local/bin | |
| * | |
| * Usage: | |
| * todo add <some task> (Multiple word tasks supported, no quotes needed) | |
| * todo list (List the tasks) | |
| * todo done <num> (Complete the task number shown in "todo list") | |
| * | |
| * Tasks are stored in a plaintext file at $HOME/.todo | |
| * | |
| */ | |
| const string HOME = getenv("HOME"); | |
| void ensure_file_exists(){ | |
| std::ifstream file(HOME + "/.todo"); | |
| if (!file){ | |
| file.close(); | |
| std::ofstream file(HOME + "/.todo"); | |
| file.close(); | |
| } | |
| } | |
| void list_tasks(){ | |
| std::ifstream file(HOME + "/.todo"); | |
| std::string task; | |
| int num = 1; | |
| while (std::getline(file, task)){ | |
| std::cout << '[' << num << "] " << task << '\n'; | |
| ++num; | |
| } | |
| file.close(); | |
| } | |
| void add_task(int argc, char** argv){ | |
| std::ofstream file(HOME + "/.todo", std::ios::app); | |
| for (int i=2; i<argc; ++i){ | |
| file.write(argv[i], strlen(argv[i])); | |
| file << ' '; | |
| } | |
| file << '\n'; | |
| file.close(); | |
| } | |
| bool remove_task(int task){ | |
| if (task < 1) | |
| return false; | |
| std::ifstream file(HOME + "/.todo"); | |
| std::ofstream tmp(HOME + "/.todotmp"); | |
| int i = 0; | |
| std::string line; | |
| while (std::getline(file, line)){ | |
| ++i; | |
| if (i != task) | |
| tmp << line << '\n'; | |
| } | |
| file.close(); | |
| tmp.close(); | |
| std::remove((HOME + "/.todo").c_str()); | |
| std::rename((HOME + "/.todotmp").c_str(), (HOME + "/.todo").c_str()); | |
| return i >= task; | |
| } | |
| int main(int argc, char** argv){ | |
| ensure_file_exists(); | |
| if (argc==1){ | |
| std::cout << "todo: Command requires an action\n"; | |
| } else { | |
| if (!strcmp(argv[1], "add")){ | |
| add_task(argc, argv); | |
| std::cout << "todo: Add successful\n"; | |
| } else if (!strcmp(argv[1], "list")){ | |
| std::cout << "todo:\n"; | |
| list_tasks(); | |
| } else if (!strcmp(argv[1], "done")){ | |
| if (remove_task(atoi(argv[2]))){ | |
| std::cout << "todo: Task completion successful\n"; | |
| } else { | |
| std::cout << "todo: Task completion failed (Task # does not exist)\n"; | |
| } | |
| } else { | |
| std::cout << "todo: Invalid action\n"; | |
| } | |
| } | |
| } |
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