#!/usr/bin/env bash
# Who is migrating? Look inside spring-core's published jar instead of trusting a blog.
#   JDK25=/path/to/jdk-25 ./scripts/spring-core-probe.sh [spring-core-version]   -> output/14-spring-core-probe.txt
set -uo pipefail
unset JAVA_TOOL_OPTIONS
HERE="$(cd "$(dirname "$0")/.." && pwd)"; JDK25="${JDK25:-/opt/jdks/jdk-25.0.5+8}"; V="${1:-7.0.10}"
W="$(mktemp -d)"; trap 'rm -rf "$W"' EXIT
URL="https://repo1.maven.org/maven2/org/springframework/spring-core/$V/spring-core-$V.jar"
for i in 1 2 3 4 5 6; do c=$(curl -s -o "$W/sc.jar" -w '%{http_code}' "$URL"); [ "$c" = 200 ] && break; sleep 20; done
[ "$c" = 200 ] || { echo "download failed ($c)"; exit 1; }
{
  echo "\$ unzip -l spring-core-$V.jar | grep 'META-INF/versions/24/.*\\.class' | wc -l"
  unzip -l "$W/sc.jar" | grep -E 'META-INF/versions/24/.*\.class' | wc -l
  echo; echo "\$ unzip -l spring-core-$V.jar | grep 'versions/24.*ClassFile'"
  unzip -l "$W/sc.jar" | grep -E 'versions/24/.*ClassFile' | awk '{print $4}'
  echo; echo "\$ unzip -l spring-core-$V.jar | grep -c 'org/springframework/asm/.*\\.class'     (the repackaged ASM is still there)"
  unzip -l "$W/sc.jar" | grep -cE 'org/springframework/asm/.*\.class'
  echo; echo "\$ javap -v -cp <jar>!/META-INF/versions/24 ...ClassFileMetadataReader | grep java/lang/classfile   (does it really call the JDK API?)"
  mkdir "$W/x"; unzip -q "$W/sc.jar" 'META-INF/versions/24/org/springframework/core/type/classreading/ClassFileMetadataReader*' -d "$W/x"
  "$JDK25/bin/javap" -v -cp "$W/x/META-INF/versions/24" org.springframework.core.type.classreading.ClassFileMetadataReader | grep -o 'java/lang/classfile/[A-Za-z$/]*' | sort -u
  echo; echo "\$ unzip -p spring-core-$V.jar META-INF/MANIFEST.MF | grep -i multi-release"
  unzip -p "$W/sc.jar" META-INF/MANIFEST.MF | grep -i multi-release
} > "$HERE/output/14-spring-core-probe.txt" 2>&1
cat "$HERE/output/14-spring-core-probe.txt"