ci: add GitHub Actions workflow

.github/workflows/ci-earthly.yml

@@ -0,0 +1,108 @@
+name: CI
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - v*
+  pull_request:
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+
+  lint:
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Setup Earthly
+        uses: earthly/actions/setup-earthly@v1
+        with:
+          version: v0.8.8
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          # Needed for `golangci-lint --new-from-rev`
+          fetch-depth: 0
+      # Needed for Earthly tagging to work
+      - name: Put back the git branch into git
+        run: |
+          branch=""
+          if [ -n "$GITHUB_HEAD_REF" ]; then
+            branch="$GITHUB_HEAD_REF"
+          else
+            branch="${GITHUB_REF##*/}"
+          fi
+          git checkout -b "$branch" || true
+      - name: Run +lint target
+        env:
+          EARTHLY_TOKEN: ${{ secrets.EARTHLY_TOKEN }}
+          EARTHLY_ORG: ${{ secrets.EARTHLY_ORG }}
+        run: earthly --ci --output --sat disco --push +lint
+      - name: Upload golangci-lint report
+        uses: actions/upload-artifact@v4
+        with:
+          name: golangci-lint-${{ github.run_id }}_${{ github.run_attempt }}
+          retention-days: 30
+          path: golangci-lint-*.txt
+
+  test:
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Setup Earthly
+        uses: earthly/actions/setup-earthly@v1
+        with:
+          version: v0.8.8
+      - name: Checkout code
+        uses: actions/checkout@v4
+      # Needed for Earthly tagging to work
+      - name: Put back the git branch into git
+        run: |
+          branch=""
+          if [ -n "$GITHUB_HEAD_REF" ]; then
+            branch="$GITHUB_HEAD_REF"
+          else
+            branch="${GITHUB_REF##*/}"
+          fi
+          git checkout -b "$branch" || true
+      - name: Run +test target
+        env:
+          EARTHLY_TOKEN: ${{ secrets.EARTHLY_TOKEN }}
+          EARTHLY_ORG: ${{ secrets.EARTHLY_ORG }}
+        run: earthly --ci --output --sat disco --push +test
+
+  publish:
+    if: ${{ startsWith(github.ref, 'refs/tags/v') || github.ref_name == 'main' }}
+    needs: [lint, test]
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Setup Earthly
+        uses: earthly/actions/setup-earthly@v1
+        with:
+          version: v0.8.8
+      - name: Checkout code
+        uses: actions/checkout@v4
+      # Needed for Earthly tagging to work
+      - name: Put back the git branch into git
+        run: |
+          branch=""
+          if [ -n "$GITHUB_HEAD_REF" ]; then
+            branch="$GITHUB_HEAD_REF"
+          else
+            branch="${GITHUB_REF##*/}"
+          fi
+          git checkout -b "$branch" || true
+      - name: Docker Login
+        run: docker login --username "${{ secrets.DOCKERHUB_USERNAME }}" --password "${{ secrets.DOCKERHUB_TOKEN }}"
+      - name: Run +publish target
+        env:
+          EARTHLY_TOKEN: ${{ secrets.EARTHLY_TOKEN }}
+          EARTHLY_ORG: ${{ secrets.EARTHLY_ORG }}
+        run: earthly --ci --output --push --secret GH_TOKEN="${{ secrets.EARTHLY_GH_TOKEN }}" --sat disco +publish
+      - name: Upload packages
+        uses: actions/upload-artifact@v4
+        with:
+          name: packages
+          path: dist/
+          retention-days: 7