Added option to compress file backups

[Pesekjak]

Problem

Backups of variables.csv can take up a lot of space for some users.

Solution

There is now an option in config to turn on automatic compression of those files. This also applies to other file backups (lang and config). I also refactored the backup method to replace the legacy code.

Testing Completed

I tested this manually, I believe we don't need automated test for this.

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Completes: #8083
Related: none
AI assistance: none

[3add]

iirc Skript's contribution requirements requires that all {} are placed after if, else, for, etc

Edit: just for for appearantly

[sovdeeth]

iirc Skript's contribution requirements requires that all {} are placed after if, else, for, etc

They can be omitted for single line ifs without elses

[Efnilite]

.zip is more accessible, why pick gz?

[Fusezion]

are they not both equally accessible?

[Pesekjak]

I agree with fusezion, also gzip is better suited for compression of single files

[TheLimeGlass]

Mojang uses .gz for the log files

[Efnilite]

what are the downsides of setting this to true by default?

[Pesekjak]

none (except you don't have to decompress to access) but I mainly wanted to keep the default behaviour the same as before. would you change it to true by default?

[3add]

I would change it true by default, if you're trying to access and/or modify the variables file you'd have to know what you're doing in which case unzipping the file isn't an issue.

[TheLimeGlass]

I recommend throwing some compression onto the GZip because the default compression isn't going to do much.

private static class GZIPOutputStreamWithLevel extends GZIPOutputStream {
	public GZIPOutputStreamWithLevel(OutputStream out, int level) throws IOException {
		super(out);
		this.def.setLevel(level);
	}
}

try (OutputStream os = Files.newOutputStream(backup); GZIPOutputStreamWithLevel gzipOs = new GZIPOutputStreamWithLevel(os, Deflater.BEST_COMPRESSION)) {
	Files.copy(source, gzipOs);
}

You can also use Apache's GzipCompressorOutputStream or TarArchiveOutputStream

Mojang uses the TarArchiveOutputStream for large files