我尝试了 DOCKER_BUILDKIT=1，但如果源代码发生更改，仍然会下载 mvn 库。我做错了什么？请注意多个 pom.xml 文件。
# syntax=docker/dockerfile:experimental
FROM maven:3-eclipse-temurin-11 AS build
WORKDIR /workdir
COPY pom.xml /workdir
COPY sub_project/pom.xml /workdir/sub_project/
COPY src /workdir/src
COPY config/settings.xml /root/.m2/settings.xml
RUN --mount=type=cache,target=/root/.m2 mvn clean package -Dmaven.test.skip
FROM eclipse-temurin:11.0.13_8-jdk-focal AS run
<other code>
我这样运行
COMPOSE_DOCKER_CLI_BUILD=1 DOCKER_BUILDKIT=1 docker-compose build my-project