docker:warp:1c5259d0e7be3161b8df9b1a488caf4d

This command is used to create a new Docker volume, copy the contents of an old volume to the new volume using an Alpine container, and then remove the old volume.

Here is a breakdown of the command:

1. docker volume create --name ${new_volume} - This command creates a new Docker volume with the specified name ${new_volume}. The docker volume create command is used to create new volumes in Docker.

2. && - This is a shell operator used to run commands sequentially. It ensures that the next command is executed only if the previous command is successful.

3. docker run --rm -it -v ${old_volume}:/from -v ${new_volume}:/to alpine ash -c 'cd /from ; cp -av . /to' - This command runs an Alpine container and mounts two volumes (${old_volume} and ${new_volume}). It then executes the command cd /from ; cp -av . /to which changes the directory to /from and copies all the contents (including subdirectories and files) from the /from volume to the /to volume. The options -rm are used to automatically remove the container after it exits, and -it is used to allocate a pseudo-TTY for interaction.

4. && - This operator is used again to ensure the next command is executed only if the previous command is successful.

5. docker volume rm ${old_volume} - This command removes the old volume ${old_volume}. The docker volume rm command is used to remove volumes in Docker.

Overall, this command creates a new volume, copies the contents from an old volume to the new volume, and then removes the old volume.