Implemented first version

.envrc

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+# Automatically sets up your devbox environment whenever you cd into this
+# directory via our direnv integration:
+
+eval "$(devbox generate direnv --print-envrc)"
+
+# check out https://www.jetpack.io/devbox/docs/ide_configuration/direnv/
+# for more details

.github/workflows/release.yml

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+name: release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+permissions:
+  contents: write
+  packages: write
+
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      -
+        name: Fetch all tags
+        run: git fetch --force --tags
+      - name: Docker Login
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Set up Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: 1.22.x
+      -
+        name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v2
+        with:
+          distribution: goreleaser
+          version: latest
+          args: release --rm-dist
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/test.yml

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+on:
+  push:
+    tags:
+      - v*
+    branches:
+      - main
+  pull_request:
+
+name: run tests
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: 1.22.x
+      - name: Checkout code
+        uses: actions/checkout@v3
+      - name: Run linters
+        uses: golangci/golangci-lint-action@v3
+
+  test:
+    strategy:
+      matrix:
+        go-version: [ '1.22.x' ]
+        os: [ 'ubuntu-latest', 'macos-latest' ]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Install Go
+        if: success()
+        uses: actions/setup-go@v3
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Checkout code
+        uses: actions/checkout@v3
+      - name: Run tests
+        run: go test -v ./...
+
+#  coverage:
+#    runs-on: ubuntu-latest
+#    steps:
+#      - name: Install Go
+#        if: success()
+#        uses: actions/setup-go@v2
+#        with:
+#          go-version: 1.15.x
+#      - name: Checkout code
+#        uses: actions/checkout@v2
+#      - name: Calc coverage
+#        run: |
+#          go test -v -covermode=count -coverprofile=coverage.out ./...
+#      - name: Convert coverage.out to coverage.lcov
+#        uses: jandelgado/[email protected]
+#      - name: Coveralls
+#        uses: coverallsapp/[email protected]
+#        with:
+#          github-token: ${{ secrets.github_token }}
+#          path-to-lcov: coverage.lcov
+#

.gitignore

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+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# devbox
+.devbox
+
+/tmp

.goreleaser.yml

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+before:
+  hooks:
+    - go mod tidy
+builds:
+  - env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+    goarch:
+      - amd64
+      - arm64
+    main: ./cmd
+archives:
+  - name_template: >-
+      {{ .ProjectName }}_
+      {{ .Version }}_
+      {{- title .Os }}_
+      {{- if eq .Arch "amd64" }}x86_64
+      {{- else if eq .Arch "386" }}i386
+      {{- else }}{{ .Arch }}{{ end }}
+dockers:
+  - image_templates:
+      - ghcr.io/networkteam/{{ .ProjectName }}:{{ .Version }}-amd64
+    dockerfile: Dockerfile
+    use: buildx
+    build_flag_templates:
+      - --platform=linux/amd64
+      - --label=org.opencontainers.image.title={{ .ProjectName }}
+      - --label=org.opencontainers.image.description={{ .ProjectName }}
+      - --label=org.opencontainers.image.url=https://github.com/networkteam/{{ .ProjectName }}
+      - --label=org.opencontainers.image.source=https://github.com/networkteam/{{ .ProjectName }}
+      - --label=org.opencontainers.image.version={{ .Version }}
+      - --label=org.opencontainers.image.created={{ time "2006-01-02T15:04:05Z07:00" }}
+      - --label=org.opencontainers.image.revision={{ .FullCommit }}
+      - --label=org.opencontainers.image.licenses=MIT
+  - image_templates:
+      - ghcr.io/networkteam/{{ .ProjectName }}:{{ .Version }}-arm64v8
+    goarch: arm64
+    dockerfile: Dockerfile
+    use: buildx
+    build_flag_templates:
+      - --platform=linux/arm64/v8
+      - --label=org.opencontainers.image.title={{ .ProjectName }}
+      - --label=org.opencontainers.image.description={{ .ProjectName }}
+      - --label=org.opencontainers.image.url=https://github.com/networkteam/{{ .ProjectName }}
+      - --label=org.opencontainers.image.source=https://github.com/networkteam/{{ .ProjectName }}
+      - --label=org.opencontainers.image.version={{ .Version }}
+      - --label=org.opencontainers.image.created={{ time "2006-01-02T15:04:05Z07:00" }}
+      - --label=org.opencontainers.image.revision={{ .FullCommit }}
+      - --label=org.opencontainers.image.licenses=MIT
+docker_manifests:
+  - name_template: ghcr.io/networkteam/{{ .ProjectName }}:{{ .Version }}
+    image_templates:
+      - ghcr.io/networkteam/{{ .ProjectName }}:{{ .Version }}-amd64
+      - ghcr.io/networkteam/{{ .ProjectName }}:{{ .Version }}-arm64v8
+  - name_template: ghcr.io/networkteam/{{ .ProjectName }}:latest
+    image_templates:
+      - ghcr.io/networkteam/{{ .ProjectName }}:{{ .Version }}-amd64
+      - ghcr.io/networkteam/{{ .ProjectName }}:{{ .Version }}-arm64v8
+checksum:
+  name_template: "checksums.txt"
+snapshot:
+  name_template: "{{ incpatch .Tag }}-next"
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - "^docs:"
+      - "^test:"

Dockerfile

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+FROM alpine:3.19
+ENTRYPOINT ["/stacker"]
+STOPSIGNAL SIGINT
+COPY stacker /stacker

LICENSE

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+MIT License
+
+Copyright (c) 2024 networkteam
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# Stacker
+
+A tool to rebase container (Docker) images instead of rebuilding them.
+
+It is based around the idea of OCI annotations for base images to just change the layers of the base image if a newer version is available.
+
+## Acknowledgements
+
+This tool heavily uses https://github.com/google/go-containerregistry/tree/main/cmd/crane for the image manipulation.
+
+## License
+
+[MIT](./LICENSE)