This action parses the metadata output of https://github.com/docker/build-push-action.
To build a container image and get the image URI,
jobs:
build:
runs-on: ubuntu-latest
outputs:
image-uri: ${{ steps.build-metadata.outputs.image-uri }}
steps:
- uses: docker/metadata-action@v5
id: metadata
with:
images: ghcr.io/${{ github.repository }}
- uses: docker/login-action@v3
with:
registry: ghcr.io
username: ${{ github.actor }}
password: ${{ secrets.GITHUB_TOKEN }}
- uses: docker/build-push-action@v6
id: build
with:
push: true
tags: ${{ steps.metadata.outputs.tags }}
labels: ${{ steps.metadata.outputs.labels }}
- uses: int128/docker-build-metadata-action@v1
id: build-metadata
with:
metadata: ${{ steps.build.outputs.metadata }}This action assumes that the metadata output of docker/build-push-action has the following format.
{
"containerimage.digest": "sha256:550ca2b897799d1ba9f799ca535bde988cd1427d039b34d583eba24ce5fc6c98",
"image.name": "ghcr.io/int128/kubebuilder-updates:main"
}The output image-uri is ghcr.io/int128/kubebuilder-updates:main@sha256:550ca2b897799d1ba9f799ca535bde988cd1427d039b34d583eba24ce5fc6c98.
If the metadata has multiple image names, the action returns the image URI with the first image name. For example,
{
"containerimage.digest": "sha256:550ca2b897799d1ba9f799ca535bde988cd1427d039b34d583eba24ce5fc6c98",
"image.name": "ghcr.io/int128/kubebuilder-updates:v1.0.0,ghcr.io/int128/kubebuilder-updates:latest"
}The output image-uri is ghcr.io/int128/kubebuilder-updates:v1.0.0@sha256:550ca2b897799d1ba9f799ca535bde988cd1427d039b34d583eba24ce5fc6c98.
If any of the metadata is missing, the action returns no output.
| Name | Default | Description |
|---|---|---|
metadata |
(required) | Output metadata of docker/build-push-action |
| Name | Description |
|---|---|
image-uri |
Image URI |