#!/bin/bashsudo docker run --rm -i ubuntu:24.04 bash<<"EOF"set -xeapt-get updateapt-get install -y \  git build-essential pkg-config libicu-dev libipc-run-perl \  flex bison libreadline-dev libz-dev gettext libperl-devgit clone -b REL_17_5 --depth 1 https://github.com/postgres/postgrescd postgresgit clone https://github.com/postgrespro/pg_wait_sampling contrib/pg_wait_samplingmkdir contrib/pgws_reproducecat - > contrib/pgws_reproduce/Makefile <<"_EOF"MODULE_big = pgws_reproduceOBJS = main.oEXTENSION = pgws_reproduceREGRESS =subdir = contrib/pgws_reproducetop_builddir = ../..include $(top_builddir)/src/Makefile.globalinclude $(top_srcdir)/contrib/contrib-global.mk_EOFcat - > contrib/pgws_reproduce/pgws_reproduce.control <<"_EOF" pg_wait_sampling extensioncomment = 'reproduce bug'default_version = '1'module_pathname = '$libdir/pgws_reproduce'relocatable = true_EOFcat - > contrib/pgws_reproduce/main.c <<"_EOF"#include "postgres.h"#include "postmaster/bgworker.h"#include "fmgr.h"#include <sched.h> /* Only works on linux. */PG_MODULE_MAGIC;void pgws_reproduce_worker_main(Datum main_arg);void _PG_init(void);void pgws_reproduce_worker_main(Datum main_arg) {  while (true) {    sched_yield();  }}void _PG_init(void) {  /* Default limit of workers is 8. */  for (int i = 0; i < 32; ++i) {    BackgroundWorker worker;    memset(&worker, 0, sizeof(worker));    worker.bgw_restart_time = 1;    worker.bgw_flags = BGWORKER_SHMEM_ACCESS;    snprintf(worker.bgw_library_name, BGW_MAXLEN, "pgws_reproduce");    snprintf(worker.bgw_function_name, BGW_MAXLEN, CppAsString(pgws_reproduce_worker_main));    worker.bgw_main_arg = (Datum) 0;    RegisterBackgroundWorker(&worker);  }}_EOFgrep -v '$(recurse' contrib/Makefile > output.txtmv output.txt contrib/Makefileecho 'SUBDIRS += pg_wait_sampling pgws_reproduce' >> contrib/Makefileecho -e '$(recurse)\n$(recurse_always)' >> contrib/MakefileCFLAGS='-ggdb -O0 -g' ./configure -q \  --enable-cassert --enable-tap-tests --enable-nls \  --with-icu --with-perl --prefix=$(pwd)/installmake -s -j$(nproc) world-binmake -s -j$(nproc) install-world-binuseradd postgreschown -R postgres .cd installsu postgres -c 'bin/initdb -D data'su postgres -c "echo \"shared_preload_libraries = 'pgws_reproduce, pg_wait_sampling'\" > data/postgresql.conf"su postgres -c 'bin/pg_ctl -D data -l logfile start' || (cat logfile; exit 1)cd ..su postgres -c 'make -C contrib/pg_wait_sampling installcheck' || (grep '(PID ' install/logfile; exit 2)cat install/logfileEOF