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Add command line flags to link to information

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This patch provides command line flags `--help` and `--license` as well as the corresponding `help` and `license` commands.

```
$ ./stockfish --help
Stockfish 200522 by the Stockfish developers (see AUTHORS file)

Stockfish is a powerful chess engine and free software licensed under the GNU GPLv3.
Stockfish is normally used with a separate graphical user interface (GUI).
Stockfish implements the universal chess interface (UCI) to exchange information.
For further information see https://github.com/official-stockfish/Stockfish#readme
or the corresponding README.md and Copying.txt files distributed with this program.

```

The idea is to provide a minimal help that links to the README.md file,
not replicating information that is already available elsewhere.

We use this opportunity to explicitly report the license as well.

closes https://github.com/official-stockfish/Stockfish/pull/4027

No functional change.
This commit is contained in:
Joost VandeVondele 2022-05-20 07:42:33 +02:00
parent f7d1491b3d
commit 48df0754bc
1 changed files with 7 additions and 1 deletions
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8
src/uci.cpp
View file

@ -285,8 +285,14 @@ void UCI::loop(int argc, char* argv[]) {
filename = f;
Eval::NNUE::save_eval(filename);
}
else if (token == "--help" || token == "help" || token == "--license" || token == "license")
sync_cout << "\nStockfish is a powerful chess engine and free software licensed under the GNU GPLv3."
"\nStockfish is normally used with a separate graphical user interface (GUI)."
"\nStockfish implements the universal chess interface (UCI) to exchange information."
"\nFor further information see https://github.com/official-stockfish/Stockfish#readme"
"\nor the corresponding README.md and Copying.txt files distributed with this program.\n" << sync_endl;
else if (!token.empty() && token[0] != '#')
sync_cout << "Unknown command: " << cmd << sync_endl;
sync_cout << "Unknown command: '" << cmd << "'. Type help for more information." << sync_endl;
} while (token != "quit" && argc == 1); // Command line args are one-shot
}