#!/usr/bin/env bash
# Captures real javap output pinning the Spring Batch 6.0 API facts this article relies on:
# the ChunkOrientedStepBuilder that chunk(int) now returns, the two different ExecutionContext
# classes, the package move of RepeatStatus, and CommandLineJobRunner's deprecation (NOT removal
# -- an earlier draft trusted a migration-guide summary that said "removed" and this transcript
# is what caught the error; see docs/09-corrections.md).
#
#   ./scripts/capture-javap.sh
#
# Needs the spring-batch-core and spring-batch-infrastructure 6.0.5 jars in the local Maven repo
# (a normal `mvn -B -o package` in this module already pulls them in).
set -euo pipefail
cd "$(dirname "$0")/.."

CORE=$(find "$HOME/.m2" -name 'spring-batch-core-6.0.5.jar' | head -1)
INFRA=$(find "$HOME/.m2" -name 'spring-batch-infrastructure-6.0.5.jar' | head -1)
: "${CORE:?spring-batch-core-6.0.5.jar not found in ~/.m2 -- run mvn -B -o package first}"
: "${INFRA:?spring-batch-infrastructure-6.0.5.jar not found in ~/.m2 -- run mvn -B -o package first}"

WORK=$(mktemp -d)
mkdir -p "$WORK/core" "$WORK/infra"
unzip -o -q "$CORE" -d "$WORK/core"
unzip -o -q "$INFRA" -d "$WORK/infra"

mkdir -p docs/output

{
  echo "# javap org.springframework.batch.core.step.builder.StepBuilder (spring-batch-core 6.0.5)"
  echo
  echo '$ javap -cp spring-batch-core-6.0.5.jar org.springframework.batch.core.step.builder.StepBuilder'
  javap -cp "$WORK/core" org.springframework.batch.core.step.builder.StepBuilder
} > docs/output/03-stepbuilder-chunk-overloads.txt

{
  echo "# javap: two ExecutionContext classes in two different packages"
  echo
  echo '$ javap -cp spring-batch-infrastructure-6.0.5.jar org.springframework.batch.infrastructure.item.ExecutionContext'
  javap -cp "$WORK/infra" org.springframework.batch.infrastructure.item.ExecutionContext
  echo
  echo '$ javap -cp spring-batch-core-6.0.5.jar org.springframework.batch.core.repository.persistence.ExecutionContext'
  javap -cp "$WORK/core" org.springframework.batch.core.repository.persistence.ExecutionContext
} > docs/output/04-two-executioncontext-classes.txt

{
  echo "# javap: CommandLineJobRunner is deprecated (forRemoval), not removed, in 6.0.5"
  echo
  echo '$ javap -verbose -cp spring-batch-core-6.0.5.jar org.springframework.batch.core.launch.support.CommandLineJobRunner | grep -A3 "^public class\|Deprecated"'
  javap -verbose -cp "$WORK/core" org.springframework.batch.core.launch.support.CommandLineJobRunner \
    | grep -A3 '^public class\|Deprecated' | head -20
} > docs/output/09-commandlinejobrunner-deprecated-not-removed.txt

rm -rf "$WORK"
echo "wrote docs/output/03-stepbuilder-chunk-overloads.txt"
echo "wrote docs/output/04-two-executioncontext-classes.txt"
echo "wrote docs/output/09-commandlinejobrunner-deprecated-not-removed.txt"