dext

A CLI tool to extract the layers of a local docker image and overlay the contents of them into a specified folder.

``` Extracts a docker image's layers to a specified location.

USAGE: dext [FLAGS] [OPTIONS]

FLAGS: -h, --help Prints help information -e, --entrypoint Write entrypoint?

OPTIONS: -f, --entry-file Entrypoint file name, relative to out_path [default: entrypoint.sh] -v, --version Docker image version [default: latest]

ARGS: Docker image name Output folder ```

Installation

$ cargo install dext

Usage

To write out the contents of the rust image:

``` $ docker pull rust

...

$ mkdir rustimage $ dext rust rustimage ```

To write the contents of an image (image), including a script to invoke it:

$ mkdir my_image $ dext -e image my_image

This will create the file my_image/entrypoint.sh that when invoked with my_image as root (e.g. in a VM or chroot environment) will invoke the image entrypoint.

Logging

Debug logging can be enabled with the RUST_LOG environment variable.

$ RUST_LOG=dext=debug dext ...