The problem#

Java and JavaScript are insufficiently easily confused. I had some code I wanted to run on the user's computer and not the server, and it specifically had to be in Java to reference a library written in Java. I found¹ Doppio, a JVM written in TypeScript, but it had bitrotted enough that I was having trouble getting it to run, despite confirming it did what I wanted using the official demo, which provides an in-browser console-like interface.

The solution#

I was able to piece together a working simple page using Doppio, modified from the official example. It's in a repository on GitHub and should be straightforward to modify for your needs.

The details#

The problem#

Tametsi (available on Steam¹) is a great logic puzzle game that is a collection of Minesweeper puzzles that can be solved without guessing. The game consists of 100 puzzles plus 60 "bonus" puzzles. The bonus puzzles are in the game directory in an XML-based format that another player has documented well enough that they have even created some puzzles of their own and a viewer for those files. But the base 100 puzzles are nowhere to be found in the puzzle directory, and I had ideas for

The solution#

Given the file DumpPuzzles.java:

public class DumpPuzzles {
    public static void main(String[] args) {
        // Loading puzzles sets the graph on
        //  Game's MouseHandler, so it has to exist.
        game.Game.mh = new io.MouseHandler(null);

        for (int i = 1; i <= 111; i++) {
            puzzle.PuzzleOut.writePuzzle(
                new puzzle.Puzzle(i),
                String.format("puzzle_%03d.puz", i));
        }
    }
}

put it in the same directory as tametsi.exe² and run

$ javac -classpath tametsi.exe DumpPuzzles.java 
$ java -classpath tametsi.exe:. DumpPuzzles

Then the puzzles/ directory will be full of files named puzzle_001.puz, etc.

The details#