picocli grpc CLI in scala build with native-image

build-native-image.sh

#!/usr/bin/env bash

scala-cli \
  --power \
  package \
  --native-image \
  --graalvm-java-version 21 \
  --graalvm-version 21.0.2 \
  ./main \
  -o sbadmin2 \
  --force \
  --main-class sbadmin2.Main \
  -- \
  -H:ReflectionConfigurationFiles=picocli-reflect.json,io.grpc-grpc-netty-reflect-config.json,io.netty-netty-common-reflect-config.json \
  --initialize-at-run-time=io.grpc.netty.shaded.io.netty \
  --initialize-at-build-time=ch.qos.logback \
  --initialize-at-build-time=org.slf4j

build-picocli-reflect-json.sh

#!/usr/bin/env bash

# Generates json file with config of reflective accesses required by picocli
# uses utils provided by picocli: https://picocli.info/picocli-on-graalvm.html

scala-cli run \
  --dep info.picocli:picocli-codegen:4.7.6 \
  ./main \
  --main-class picocli.codegen.aot.graalvm.ReflectionConfigGenerator \
  -- \
  sbadmin2.commands.MainCmd \
  sbadmin2.commands.utils.EchoCmd \
  > picocli-reflect.json

build-reflect-jsons.sh

#!/usr/bin/env bash

# those files are required because grpc-java have a shaded netty with broken native-image config.
# We need to take native netty config available here: https://github.com/oracle/graalvm-reachability-metadata/tree/master/metadata/io.netty
# and adjust packages for grpc-shaded ones.

curl \
  https://raw.githubusercontent.com/oracle/graalvm-reachability-metadata/master/metadata/io.grpc/grpc-netty/1.51.0/reflect-config.json \
  | sed -e 's/"io.grpc.netty\./"io.grpc.netty.shaded.io.grpc.netty./g' \
  | sed -e 's/"io\.netty\./"io.grpc.netty.shaded.io.netty./g' \
  > io.grpc-grpc-netty-reflect-config.json


curl \
  https://raw.githubusercontent.com/oracle/graalvm-reachability-metadata/master/metadata/io.netty/netty-common/4.1.80.Final/reflect-config.json \
  | sed -e 's/"io\.netty\./"io.grpc.netty.shaded.io.netty./g' \
  > io.netty-netty-common-reflect-config.json