name: Build
run-name: ${{ gitea.actor }} is building mapsyncer-paper 🗺️
on:
  push:
    branches: [main]
    tags: ['v*']
  pull_request:
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Check out repository code
        uses: actions/checkout@v4

      - name: Set up JDK
        uses: actions/setup-java@v4
        with:
          distribution: temurin
          # Must be >= the `javaRelease` in gradle.properties (the class-file
          # target that matches the Minecraft server's own JVM). Newer is fine:
          # javac's --release pins the output regardless.
          java-version: '25'

      - name: Cache Gradle
        uses: actions/cache@v4
        with:
          # The paperweight dev bundle is decompiled/remapped into
          # ~/.gradle/caches/paperweight on first use; it is several minutes of
          # work, so keep it between runs.
          path: |
            ~/.gradle/caches
            ~/.gradle/wrapper
          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle.kts', 'gradle/wrapper/gradle-wrapper.properties', 'gradle.properties') }}
          restore-keys: |
            ${{ runner.os }}-gradle-

      - name: Build and test
        run: ./gradlew --no-daemon build

      - name: Name the artifact
        id: jar
        run: |
          set -euo pipefail
          path="$(ls build/libs/mapsyncer-paper-*.jar | grep -vE -- '-(sources|thin)\.jar$' | head -1)"
          echo "path=$path"           >> "$GITHUB_OUTPUT"
          echo "name=$(basename "$path")" >> "$GITHUB_OUTPUT"
          ls -la build/libs/

      - name: Upload the plugin jar
        # v3, not v4, deliberately. v4 needs the artifact service v2, which only
        # some runners in this fleet advertise; `runs-on: ubuntu-latest` can land
        # on any of them, and v4 fails there with GHESNotSupportedError. v3 uses
        # the older protocol, which every runner still serves.
        uses: actions/upload-artifact@v3
        with:
          name: mapsyncer-paper
          path: build/libs/mapsyncer-paper-*.jar
          retention-days: 90

      - name: Publish a release for a tag
        if: startsWith(gitea.ref, 'refs/tags/v')
        env:
          # Injected by Gitea Actions for the running repository.
          TOKEN: ${{ secrets.GITHUB_TOKEN }}
          API: ${{ gitea.server_url }}/api/v1/repos/${{ gitea.repository }}
          TAG: ${{ gitea.ref_name }}
          JAR: ${{ steps.jar.outputs.path }}
          JAR_NAME: ${{ steps.jar.outputs.name }}
        run: |
          set -euo pipefail
          # Reuse the release if the tag was built before, so a re-run does not
          # fail on "already exists".
          id="$(curl -sS -H "Authorization: token $TOKEN" "$API/releases/tags/$TAG" \
                | sed -n 's/.*"id":[[:space:]]*\([0-9]\+\).*/\1/p' | head -1 || true)"
          if [ -z "$id" ]; then
            id="$(curl -sS -X POST -H "Authorization: token $TOKEN" \
                    -H 'Content-Type: application/json' \
                    -d "{\"tag_name\":\"$TAG\",\"name\":\"$TAG\"}" "$API/releases" \
                  | sed -n 's/.*"id":[[:space:]]*\([0-9]\+\).*/\1/p' | head -1)"
          fi
          curl -sS -X POST -H "Authorization: token $TOKEN" \
            -F "attachment=@$JAR" \
            "$API/releases/$id/assets?name=$JAR_NAME" > /dev/null
          echo "Attached $JAR_NAME to release $TAG"