[5.x] Unix compress (.Z)

Read-only: Compress4J can extract this format but cannot create it.

Select it with Compression.unixZ(); Decompressor and the tar extractor detect it from its magic number. It needs no extra dependency and has no options.

The .Z format has no end marker, so a truncated file decompresses to a shorter output without an error. .tar.Z extraction fails when the truncation cuts a tar entry short. A cut that falls between entries reads as the end of the archive.

Decompressor enforces the default limits; a stream that expands past a ratio of 100 after the first MiB throws LimitExceededException.

Example Usage

Unix compress Decompression

try (Decompressor decompressor =
        Decompressor.builder(Path.of("example.Z"), Compression.unixZ()).build()) {
    decompressor.write(Path.of("path/to/file.txt"));
}

The tar extractor reads .tar.Z too; see tar.