base layout and CI

.gitea/workflows/build-linux.yml

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+name: build-linux
+
+on:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.GITEA_TOKEN }}
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.22"
+
+      - name: Build Linux executable
+        run: |
+          mkdir -p dist
+          CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -trimpath -ldflags="-s -w" -o dist/infra-map-linux-amd64 .
+
+      - name: PR build complete
+        if: github.event_name == 'pull_request'
+        run: echo "PR build succeeded; release creation is skipped on pull requests."
+
+      - name: Generate dev tag
+        if: github.event_name != 'pull_request'
+        id: dev_tag
+        run: |
+          tag="dev-$(date -u +%Y%m%d-%H%M%S)-${GITHUB_SHA::7}"
+          echo "tag=$tag" >> "$GITHUB_OUTPUT"
+          echo "tag=$tag"
+
+      - name: Create and push tag
+        if: github.event_name != 'pull_request'
+        env:
+          TAG: ${{ steps.dev_tag.outputs.tag }}
+        run: |
+          git config user.name "gitea-actions"
+          git config user.email "gitea-actions@localhost"
+          git tag "$TAG" "$GITHUB_SHA"
+          git push origin "$TAG"
+
+      - name: Create dev release and upload binary
+        if: github.event_name != 'pull_request'
+        env:
+          TAG: ${{ steps.dev_tag.outputs.tag }}
+          GITHUB_TOKEN: ${{ secrets.GITEA_TOKEN }}
+        run: |
+          api_url="${GITHUB_API_URL:-${GITHUB_SERVER_URL}/api/v1}"
+
+          release_json="$(curl -fsS \
+            -X POST \
+            -H "Authorization: token ${GITHUB_TOKEN}" \
+            -H "Content-Type: application/json" \
+            "${api_url}/repos/${GITHUB_REPOSITORY}/releases" \
+            -d "{\"tag_name\":\"${TAG}\",\"target_commitish\":\"${GITHUB_SHA}\",\"name\":\"${TAG}\",\"prerelease\":true,\"body\":\"Automated dev build for ${GITHUB_SHA}\"}")"
+
+          release_id="$(echo "$release_json" | grep -oE '"id":[[:space:]]*[0-9]+' | head -n1 | tr -dc '0-9')"
+          if [ -z "$release_id" ]; then
+            echo "failed to parse release id"
+            echo "$release_json"
+            exit 1
+          fi
+
+          curl -fsS \
+            -X POST \
+            -H "Authorization: token ${GITHUB_TOKEN}" \
+            -H "Content-Type: application/octet-stream" \
+            --data-binary @dist/infra-map-linux-amd64 \
+            "${api_url}/repos/${GITHUB_REPOSITORY}/releases/${release_id}/assets?name=infra-map-linux-amd64"

go.mod

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+module inframap
+
+go 1.22