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# `crane`
[`crane`](doc/crane.md) is a tool for interacting with remote images
and registries.
<img src="../../images/crane.png" width="40%">
A collection of useful things you can do with `crane` is [here](recipes.md).
## Installation
### Install from Releases
1. Get the [latest release](https://github.com/google/go-containerregistry/releases/latest) version.
```sh
$ VERSION=$(curl -s "https://api.github.com/repos/google/go-containerregistry/releases/latest" | jq -r '.tag_name')
```
or set a specific version:
```sh
$ VERSION=vX.Y.Z # Version number with a leading v
```
1. Download the release.
```sh
$ OS=Linux # or Darwin, Windows
$ ARCH=x86_64 # or arm64, x86_64, armv6, i386, s390x
$ curl -sL "https://github.com/google/go-containerregistry/releases/download/${VERSION}/go-containerregistry_${OS}_${ARCH}.tar.gz" > go-containerregistry.tar.gz
```
1. Verify the signature. We generate [SLSA 3 provenance](https://slsa.dev) using
the OpenSSF's [slsa-framework/slsa-github-generator](https://github.com/slsa-framework/slsa-github-generator).
To verify our release, install the verification tool from [slsa-framework/slsa-verifier#installation](https://github.com/slsa-framework/slsa-verifier#installation)
and verify as follows:
```sh
$ curl -sL https://github.com/google/go-containerregistry/releases/download/${VERSION}/multiple.intoto.jsonl > provenance.intoto.jsonl
$ # NOTE: You may be using a different architecture.
$ slsa-verifier-linux-amd64 verify-artifact go-containerregistry.tar.gz --provenance-path provenance.intoto.jsonl --source-uri github.com/google/go-containerregistry --source-tag "${VERSION}"
PASSED: Verified SLSA provenance
```
1. Unpack it in the PATH.
```sh
$ tar -zxvf go-containerregistry.tar.gz -C /usr/local/bin/ crane
```
### Install manually
Install manually:
```sh
go install github.com/google/go-containerregistry/cmd/crane@latest
```
### Install via brew
If you're macOS user and using [Homebrew](https://brew.sh/), you can install via brew command:
```sh
$ brew install crane
```
### Install on Arch Linux
If you're an Arch Linux user you can install via pacman command:
```sh
$ pacman -S crane
```
### Setup on GitHub Actions
You can use the [`setup-crane`](https://github.com/imjasonh/setup-crane) action
to install `crane` and setup auth to [GitHub Container
Registry](https://github.com/features/packages) in a GitHub Action workflow:
```
steps:
- uses: imjasonh/setup-crane@v0.1
```
## Images
You can also use crane as docker image
```sh
$ docker run --rm gcr.io/go-containerregistry/crane ls ubuntu
10.04
12.04.5
12.04
12.10
```
And it's also available with a shell, at the `:debug` tag:
```sh
docker run --rm -it --entrypoint "/busybox/sh" gcr.io/go-containerregistry/crane:debug
```
Tagged debug images are available at `gcr.io/go-containerregistry/crane/debug:[tag]`.
### Using with GitLab
```yaml
# Tags an existing Docker image which was tagged with the short commit hash with the tag 'latest'
docker-tag-latest:
stage: latest
only:
refs:
- main
image:
name: gcr.io/go-containerregistry/crane:debug
entrypoint: [""]
script:
- crane auth login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
- crane tag $CI_REGISTRY_IMAGE:$CI_COMMIT_SHORT_SHA latest
```
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