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+#
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+name: Create and publish a Docker image
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+
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+# Configures this workflow to run every time a change is pushed to the branch called `release`.
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+on:
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+ push:
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+ tags:
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+ - v*
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+
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+# Defines two custom environment variables for the workflow. These are used for the Container registry domain, and a name for the Docker image that this workflow builds.
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+env:
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+ REGISTRY: ghcr.io
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+ IMAGE_NAME: ${{ github.repository }}
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+
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+# There is a single job in this workflow. It's configured to run on the latest available version of Ubuntu.
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+jobs:
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+ build-and-push-image:
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+ runs-on: ubuntu-latest
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+ # Sets the permissions granted to the `GITHUB_TOKEN` for the actions in this job.
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+ permissions:
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+ contents: read
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+ packages: write
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+ #
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+ steps:
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+ - name: Checkout repository
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+ uses: actions/checkout@v4
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+ # Uses the `docker/login-action` action to log in to the Container registry registry using the account and password that will publish the packages. Once published, the packages are scoped to the account defined here.
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+ - name: Log in to the Container registry
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+ uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
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+ with:
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+ registry: ${{ env.REGISTRY }}
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+ username: ${{ github.actor }}
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+ password: ${{ secrets.GITHUB_TOKEN }}
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+ # This step uses [docker/metadata-action](https://github.com/docker/metadata-action#about) to extract tags and labels that will be applied to the specified image. The `id` "meta" allows the output of this step to be referenced in a subsequent step. The `images` value provides the base name for the tags and labels.
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+ - name: Extract metadata (tags, labels) for Docker
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+ id: meta
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+ uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
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+ with:
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+ images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
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+ # This step uses the `docker/build-push-action` action to build the image, based on your repository's `Dockerfile`. If the build succeeds, it pushes the image to GitHub Packages.
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+ # It uses the `context` parameter to define the build's context as the set of files located in the specified path. For more information, see "[Usage](https://github.com/docker/build-push-action#usage)" in the README of the `docker/build-push-action` repository.
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+ # It uses the `tags` and `labels` parameters to tag and label the image with the output from the "meta" step.
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+ - name: Build and push Docker image
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+ uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
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+ with:
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+ context: .
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+ push: true
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+ tags: ${{ steps.meta.outputs.tags }}
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+ labels: ${{ steps.meta.outputs.labels }}
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