52 lines
2.4 KiB
Markdown
52 lines
2.4 KiB
Markdown
[](https://godoc.org/github.com/containers/image) [](https://travis-ci.org/containers/image)
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`image` is a set of Go libraries aimed at working in various way with
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containers' images and container image registries.
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The containers/image library allows application to pull and push images from
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container image registries, like the upstream docker registry. It also
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implements "simple image signing".
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The containers/image library also allows you to inspect a repository on a
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container registry without pulling down the image. This means it fetches the
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repository's manifest and it is able to show you a `docker inspect`-like json
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output about a whole repository or a tag. This library, in contrast to `docker
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inspect`, helps you gather useful information about a repository or a tag
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without requiring you to run `docker pull`.
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The containers/image library also allows you to translate from one image format
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to another, for example docker container images to OCI images. It also allows
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you to copy container images between various registries, possibly converting
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them as necessary, and to sign and verify images.
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The [skopeo](https://github.com/projectatomic/skopeo) tool uses the
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containers/image library and takes advantage of its many features.
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## Dependencies
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Dependencies that this library prefers will not be found in the `vendor`
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directory. This is so you can make well-informed decisions about which
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libraries you should use with this package in your own projects.
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What this project tests against dependencies-wise is located
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[here](https://github.com/containers/image/blob/master/vendor.conf).
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## Building
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For ordinary use, `go build ./...` is sufficient.
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When developing this library, please use `make` to take advantage of the tests and validation.
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Optionally, you can use the `containers_image_openpgp` build tag (using `go build -tags …`, or `make … BUILDTAGS=…`).
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This will use a Golang-only OpenPGP implementation for signature verification instead of the default cgo/gpgme-based implementation;
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the primary downside is that creating new signatures with the Golang-only implementation is not supported.
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## License
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ASL 2.0
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## Contact
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- Mailing list: [containers-dev](https://groups.google.com/forum/?hl=en#!forum/containers-dev)
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- IRC: #[container-projects](irc://irc.freenode.net:6667/#container-projects) on freenode.net
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