iAklis / stereoscope

go library for processing container images and simulating a squash filesystem

stereoscope

A library for working with container image contents, layer file trees, and squashed file trees.

Getting Started

See examples/basic.go

docker image save centos:8 -o centos.tar
go run examples/basic.go ./centos.tar

Note: To run tests you will need skopeo installed.

Overview

This library provides the means to:

• parse and read images from multiple sources, supporting:
  • docker V2 schema images from the docker daemon, podman, or archive
  • OCI images from disk, directory, or registry
  • singularity formatted image files
• build a file tree representing each layer blob
• create a squashed file tree representation for each layer
• search one or more file trees for selected paths
• catalog file metadata in all layers
• query the underlying image tar for content (file content within a layer)