aspiesoft/docker-xz2gz

Convert all `tar.xz` files in a specified directory to `tar.gz` through a docker container acting as a virtual machine.

XZ to GZ

Convert all tar.xz files in a specified directory to tar.gz through a docker container acting as a virtual machine.

DockerHub

Usage

docker run -v <My Input Directory>:/input aspiesoft/xz2gz:latest

# example
docker run -v ./dir:/input aspiesoft/xz2gz:latest

How To Handle Output (Optional)

docker run -v <My Input Directory>:/input -e XZMODE="<Choose Method>" aspiesoft/xz2gz:latest

# example
docker run -v ./dir:/input -e XZMODE="remove" aspiesoft/xz2gz:latest

XZMODE Methods

• remove: (default) removes <file>.tar.xz after successfully creating <file>.tar.gz
• keep: keeps <file>.tar.xz without touching it
• rename: removes <file>.tar.xz, then renames <file>.tar.gz to <file>.tar.xz
• link: removes <file>.tar.xz, then creates a symlink to <file>.tar.gz named <file>.tar.xz
• rename-link: removes <file>.tar.xz, then renames <file>.tar.gz to <file>.tar.xz, then creates a symlink to <file>.tar.xz named <file>.tar.gz

Why rename a .tar.gz file to .tar.xz?

For the tar command in linux, it is considered a best practice to use tar -xf and not tar -xJf or tar -xzf. This means it is more common not to specify a compression algorithm when decompressing archives, and to instead let the tar command handle it. The tar command in linux does not care what the file extension is, and actually reads the headers of the file to determine whether it is .xz or .gz that should be used for decompression.

If you need to convert a .tar.xz file to .tar.gz, and cannot change a program to look for .gz instead of .xz, if that program happens to follow the linux best practice, then we can force the .tar.gz file to be compatible, by renaming it to .tar.xz. It will still use the .gz algorithm, but the program will still find its expected .xz file.

Note: If a specific program does not follow the linux best practice, and chose to specify a decompression algorithm like tar -xJf, then the program may run into errors.