# syntax=docker/dockerfile:1
#
# Multi-stage GraalVM native image for a Spring Boot Gradle project (Groovy or Kotlin DSL).
# Adapted from jdubois/dr-jskill (Apache-2.0); see references/PROVENANCE.md.
# Requires the `native` dependency (org.graalvm.buildtools.native plugin).
#
#   docker build -f Dockerfile-native-gradle -t my-spring-app-native .
#   docker run --rm -p 8080:8080 my-spring-app-native

FROM ghcr.io/graalvm/graalvm-community:25 AS build

WORKDIR /app

COPY gradlew .
COPY gradle gradle
COPY settings.gradle* build.gradle* ./
RUN chmod +x gradlew && ./gradlew --no-daemon dependencies > /dev/null

COPY src ./src

ENV NATIVE_IMAGE_OPTIONS="-H:+StaticExecutableWithDynamicLibC"

RUN ./gradlew --no-daemon nativeCompile

# The executable is named after the project; copy it to a fixed name.
# GraalVM 25 also drops executable libjava.so/libjvm.so stubs next to it: skip them.
RUN native_exe=$(find build/native/nativeCompile -maxdepth 1 -type f -executable ! -name '*.jar' ! -name '*.original' ! -name '*.so' | head -1) && \
    test -n "$native_exe" && cp "$native_exe" native-app

FROM gcr.io/distroless/base-debian12:nonroot

WORKDIR /app

COPY --from=build --chown=nonroot:nonroot /app/native-app native-app

USER nonroot

EXPOSE 8080

ENTRYPOINT ["./native-app"]