Merge pull request #1 from classabbyamp/docker

add Dockerfile, CI

.github/workflows/build.yaml

@@ -0,0 +1,70 @@
+---
+name: 'Build container'
+
+on:
+  workflow_dispatch:
+  pull_request:
+    branches:
+      - main
+    paths-ignore:
+      - LICENSE
+      - README.md
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - LICENSE
+      - README.md
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout
+        uses: classabbyamp/treeless-checkout-action@v1
+
+      - name: Docker metadata
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: |
+            ghcr.io/${{ github.repository }}
+          tags: |
+            type=sha,prefix=
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=raw,value={{date 'YYYYMMDD'}},enable={{is_default_branch}},priority=1000
+          flavor: latest=false
+          labels: |
+            org.opencontainers.image.source=https://github.com/${{ github.repository }}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to GCHR
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push images
+        id: build_and_push
+        uses: docker/build-push-action@v3
+        with:
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          platforms: linux/amd64,linux/arm64

Dockerfile

@@ -0,0 +1,10 @@
+FROM golang:1.21-alpine as build
+WORKDIR /app
+COPY go.mod go.sum main.go .
+RUN go build -v -o xbps-legacy-sign
+
+FROM scratch
+COPY --from=build /app/xbps-legacy-sign /xbps-legacy-sign
+ENTRYPOINT [ "/xbps-legacy-sign", "-private-key", "/secrets/id_rsa", \
+	"-passphrase-file", "/secrets/id_rsa_passphrase", "-watch" ]
+CMD [ "/pkgs" ]