Initial commit

.github/dependabot.yml

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+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/build.yml

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+---
+name: build-ublue-custom
+on:
+  pull_request:
+    branches:
+      - main
+  schedule:
+    - cron: '05 10 * * *'  # 10:05am UTC everyday
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - '**/README.md'
+  workflow_dispatch:
+
+env:
+  MY_IMAGE_NAME: "${{ github.event.repository.name }}"  # the name of the image produced by this build, matches repo names
+  MY_IMAGE_DESC: "My Customized Universal Blue Image"
+  IMAGE_REGISTRY: "ghcr.io/${{ github.repository_owner }}"  # do not edit
+
+jobs:
+  build_push:
+    name: Build and push image
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+
+    steps:
+      # Checkout push-to-registry action GitHub repository
+      - name: Checkout Push to Registry action
+        uses: actions/checkout@v4
+
+      - name: Generate tags
+        id: generate-tags
+        shell: bash
+        run: |
+          # Generate a timestamp for creating an image version history
+          TIMESTAMP="$(date +%Y%m%d)"
+          COMMIT_TAGS=()
+          BUILD_TAGS=()
+
+          # Have tags for tracking builds during pull request
+          SHA_SHORT="${GITHUB_SHA::7}"
+          COMMIT_TAGS+=("pr-${{ github.event.number }}")
+          COMMIT_TAGS+=("${SHA_SHORT}")
+
+          # Append matching timestamp tags to keep a version history
+          for TAG in "${BUILD_TAGS[@]}"; do
+              BUILD_TAGS+=("${TAG}-${TIMESTAMP}")
+          done
+
+          BUILD_TAGS+=("${TIMESTAMP}")
+          BUILD_TAGS+=("latest")
+
+          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
+              echo "Generated the following commit tags: "
+              for TAG in "${COMMIT_TAGS[@]}"; do
+                  echo "${TAG}"
+              done
+
+              alias_tags=("${COMMIT_TAGS[@]}")
+          else
+              alias_tags=("${BUILD_TAGS[@]}")
+          fi
+
+          echo "Generated the following build tags: "
+          for TAG in "${BUILD_TAGS[@]}"; do
+              echo "${TAG}"
+          done
+
+          echo "alias_tags=${alias_tags[*]}" >> $GITHUB_OUTPUT
+
+      # Build metadata
+      - name: Image Metadata
+        uses: docker/metadata-action@v5
+        id: meta
+        with:
+          images: |
+            ${{ env.MY_IMAGE_NAME }}
+
+          labels: |
+            io.artifacthub.package.readme-url=https://raw.githubusercontent.com/${{ github.repository }}/main/README.md
+            org.opencontainers.image.description=${{ env.MY_IMAGE_DESC }}
+            org.opencontainers.image.title=${{ env.MY_IMAGE_NAME }}
+
+      # Build image using Buildah action
+      - name: Build Image
+        id: build_image
+        uses: redhat-actions/buildah-build@v2
+        with:
+          containerfiles: |
+            ./Containerfile
+          # Postfix image name with -custom to make it a little more descriptive
+          # Syntax: https://docs.github.com/en/actions/learn-github-actions/expressions#format
+          image: ${{ env.MY_IMAGE_NAME }}
+          tags: |
+            ${{ steps.generate-tags.outputs.alias_tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          oci: false
+
+      # Workaround bug where capital letters in your GitHub username make it impossible to push to GHCR.
+      # https://github.com/macbre/push-to-ghcr/issues/12
+      - name: Lowercase Registry
+        id: registry_case
+        uses: ASzc/change-string-case-action@v6
+        with:
+          string: ${{ env.IMAGE_REGISTRY }}
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Push Image to GHCR
+        uses: redhat-actions/push-to-registry@v2
+        id: push
+        env:
+          REGISTRY_USER: ${{ github.actor }}
+          REGISTRY_PASSWORD: ${{ github.token }}
+        with:
+          image: ${{ steps.build_image.outputs.image }}
+          tags: ${{ steps.build_image.outputs.tags }}
+          registry: ${{ steps.registry_case.outputs.lowercase }}
+          username: ${{ env.REGISTRY_USER }}
+          password: ${{ env.REGISTRY_PASSWORD }}
+          extra-args: |
+            --disable-content-trust
+
+      # This section is optional and only needs to be enabled in you plan on distributing
+      # your project to others to consume. You will need to create a public and private key
+      # using Cosign and save the private key as a repository secret in Github for this workflow
+      # to consume. For more details, review the image signing section of the README.
+
+      # Sign container
+      - uses: sigstore/cosign-installer@v3.5.0
+        if: github.event_name != 'pull_request'
+
+      - name: Sign container image
+        if: github.event_name != 'pull_request'
+        run: |
+          cosign sign -y --key env://COSIGN_PRIVATE_KEY ${{ steps.registry_case.outputs.lowercase }}/${{ steps.build_image.outputs.image }}@${TAGS}
+        env:
+          TAGS: ${{ steps.push.outputs.digest }}
+          COSIGN_EXPERIMENTAL: false
+          COSIGN_PRIVATE_KEY: ${{ secrets.SIGNING_SECRET }}

.gitignore

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+cosign.key

Containerfile

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+## 1. BUILD ARGS
+# These allow changing the produced image by passing different build args to adjust
+# the source from which your image is built.
+# Build args can be provided on the commandline when building locally with:
+#   podman build -f Containerfile --build-arg FEDORA_VERSION=40 -t local-image
+
+# SOURCE_IMAGE arg can be anything from ublue upstream which matches your desired version:
+# See list here: https://github.com/orgs/ublue-os/packages?repo_name=main
+# - "silverblue"
+# - "kinoite"
+# - "sericea"
+# - "onyx"
+# - "lazurite"
+# - "vauxite"
+# - "base"
+#
+#  "aurora", "bazzite", "bluefin" or "ucore" may also be used but have different suffixes.
+ARG SOURCE_IMAGE="silverblue"
+
+## SOURCE_SUFFIX arg should include a hyphen and the appropriate suffix name
+# These examples all work for silverblue/kinoite/sericea/onyx/lazurite/vauxite/base
+# - "-main"
+# - "-nvidia"
+# - "-asus"
+# - "-asus-nvidia"
+# - "-surface"
+# - "-surface-nvidia"
+#
+# aurora, bazzite and bluefin each have unique suffixes. Please check the specific image.
+# ucore has the following possible suffixes
+# - stable
+# - stable-nvidia
+# - stable-zfs
+# - stable-nvidia-zfs
+# - (and the above with testing rather than stable)
+ARG SOURCE_SUFFIX="-main"
+
+## SOURCE_TAG arg must be a version built for the specific image: eg, 39, 40, gts, latest
+ARG SOURCE_TAG="latest"
+
+
+### 2. SOURCE IMAGE
+## this is a standard Containerfile FROM using the build ARGs above to select the right upstream image
+FROM ghcr.io/ublue-os/${SOURCE_IMAGE}${SOURCE_SUFFIX}:${SOURCE_TAG}
+
+
+### 3. MODIFICATIONS
+## make modifications desired in your image and install packages by modifying the build.sh script
+## the following RUN directive does all the things required to run "build.sh" as recommended.
+
+COPY build.sh /tmp/build.sh
+
+RUN mkdir -p /var/lib/alternatives && \
+    /tmp/build.sh && \
+    ostree container commit
+## NOTES:
+# - /var/lib/alternatives is required to prevent failure with some RPM installs
+# - All RUN commands must end with ostree container commit
+#   see: https://coreos.github.io/rpm-ostree/container/#using-ostree-container-commit