#!/usr/bin/env bash
# Facts that a test cannot observe, read straight out of the jars on the classpath.
#   10-chained-transaction-manager-jar.txt   is ChainedTransactionManager still shipped, and is it deprecated?
#   11-enable-jpa-repositories-not-repeatable.txt   what javac says about two @EnableJpaRepositories on one class
#   12-builder-packages.txt   how EntityManagerFactoryBuilder.Builder.packages(Class...) turns classes into packages
set -euo pipefail
cd "$(dirname "$0")/.."
mkdir -p output target
mvn -B -q dependency:build-classpath -Dmdep.outputFile=target/classpath.txt >/dev/null
CP="$(cat target/classpath.txt)"

commons="$(tr ':' '\n' < target/classpath.txt | grep 'spring-data-commons' | head -1)"
{
  echo "# Is org.springframework.data.transaction.ChainedTransactionManager still shipped, and is it deprecated?"
  echo
  echo "jar:      $(basename "$commons")"
  echo "class:    $(unzip -l "$commons" | awk '{print $4}' | grep 'transaction/ChainedTransactionManager.class')"
  echo
  echo "--- javap -v: class-level annotations ---"
  javap -v -cp "$commons" org.springframework.data.transaction.ChainedTransactionManager \
    | awk '/^RuntimeVisibleAnnotations:/{p=1} p{print} /^BootstrapMethods:/{p=0}' | sed '/^BootstrapMethods:/,$d'
  echo "--- javap -v: Deprecated attribute ---"
  javap -v -cp "$commons" org.springframework.data.transaction.ChainedTransactionManager | grep -E '^Deprecated:'
} > output/10-chained-transaction-manager-jar.txt

{
  echo "# javac on a class carrying two @EnableJpaRepositories (scripts/facts/RepeatedEnable.java)"
  echo
  javac -proc:none -d target/facts -cp "$CP" scripts/facts/RepeatedEnable.java 2>&1 | grep -v "^Picked up" | sed "s|scripts/facts/||" || true
} > output/11-enable-jpa-repositories-not-repeatable.txt

boot_jpa="$(tr ':' '\n' < target/classpath.txt | grep 'spring-boot-jpa-' | head -1)"
{
  echo "# What does EntityManagerFactoryBuilder.Builder.packages(Class...) do with the classes it is given?"
  echo
  echo "jar: $(basename "$boot_jpa")"
  echo
  echo "--- javap -c: the calls made inside packages(java.lang.Class<?>...) ---"
  javap -c -p -cp "$boot_jpa" 'org.springframework.boot.jpa.EntityManagerFactoryBuilder$Builder' 2>&1 \
    | grep -v '^Picked up' \
    | awk '/packages\(java.lang.Class<\?>\.\.\.\);/{p=1} p&&/^$/{p=0} p' \
    | grep -E 'invoke' | sed 's/^ *[0-9]*: *//'
} > output/12-builder-packages.txt

cat output/10-chained-transaction-manager-jar.txt output/11-enable-jpa-repositories-not-repeatable.txt output/12-builder-packages.txt