# 构建阶段：Maven + JDK 17 编译，生成薄 jar 及依赖
FROM maven:3.9-eclipse-temurin-17-alpine AS builder
WORKDIR /app

# 优先复制 pom.xml 利用 Docker 层缓存（依赖不变时跳过 go-offline）
COPY pom.xml .
RUN mvn dependency:go-offline -q

COPY src ./src
RUN mvn clean package -DskipTests -q

# 运行阶段：仅含 JRE 的精简镜像
FROM eclipse-temurin:17-jre-alpine
WORKDIR /app

# 复制部署结构：bin/ libs/ etc/
COPY --from=builder /app/src/main/scripts/start.sh        bin/start.sh
COPY --from=builder /app/target/libs/                      libs/
COPY --from=builder /app/src/main/resources/application.yml etc/application.yml
COPY --from=builder /app/src/main/resources/logback.xml    etc/logback.xml

RUN mkdir -p logs && chmod +x bin/start.sh

EXPOSE 8080

# start.sh 检测到 /.dockerenv 后以 exec 前台方式运行
ENTRYPOINT ["bin/start.sh"]