#!/bin/sh
set -f

[ -n "${IEP_TRACE}" ] || IEP_TRACE=0
[ "${IEP_TRACE}" = 1 ] || IEP_TRACE=0
[ "${IEP_TRACE}" = 0 ] || echo "# trace: $(date +'%Y-%m-%d %H:%M:%S.%03N %z'): start" >&2

iep_preserve_env() {
	## preserve LD_PRELOAD
	unset __IEP_LD_PRELOAD
	__IEP_LD_PRELOAD="${LD_PRELOAD:-}"
	unset LD_PRELOAD

	## glibc: preserve GLIBC_TUNABLES
	unset __IEP_GLIBC_TUNABLES
	__IEP_GLIBC_TUNABLES="${GLIBC_TUNABLES:-}"
	unset GLIBC_TUNABLES

	## glibc: preserve MALLOC_ARENA_MAX
	unset __IEP_MALLOC_ARENA_MAX
	__IEP_MALLOC_ARENA_MAX="${MALLOC_ARENA_MAX:-2}"
	export MALLOC_ARENA_MAX=2

	## jemalloc: preserve MALLOC_CONF
	unset __IEP_MALLOC_CONF
	__IEP_MALLOC_CONF="${MALLOC_CONF:-}"
	unset MALLOC_CONF
}

iep_prepare_env() {
	## Angie: unset core variable
	unset ANGIE ANGIE_BPF_MAPS

	## dumb-init: preserve args
	unset IEP_DUMB_INIT_ARGS
	IEP_DUMB_INIT_ARGS="${DUMB_INIT_ARGS:-}"
	unset DUMB_INIT_ARGS
	if [ "${DUMB_INIT_SETSID:-}" = 0 ] ; then
		IEP_DUMB_INIT_ARGS="-c${IEP_DUMB_INIT_ARGS:+ }${IEP_DUMB_INIT_ARGS}"
	fi
	unset DUMB_INIT_SETSID
}

iep_restore_env() {
	unset IEP_DEBUG IEP_VERBOSE IEP_TRACE IEP_ROOT
	unset IEP_LOCAL_OVERRIDE IEP_RETAIN_MERGED_TREE IEP_RETAIN_ENV

	## restore LD_PRELOAD
	if [ -n "${__IEP_LD_PRELOAD:-}" ] ; then
		export LD_PRELOAD="${__IEP_LD_PRELOAD}"
	fi
	unset __IEP_LD_PRELOAD

	## glibc: restore GLIBC_TUNABLES
	if [ -n "${__IEP_GLIBC_TUNABLES:-}" ] ; then
		export GLIBC_TUNABLES="${__IEP_GLIBC_TUNABLES}"
	fi
	unset __IEP_GLIBC_TUNABLES

	## glibc: restore MALLOC_ARENA_MAX
	if [ -n "${__IEP_MALLOC_ARENA_MAX:-}" ] ; then
		export MALLOC_ARENA_MAX="${__IEP_MALLOC_ARENA_MAX}"
	fi
	unset __IEP_MALLOC_ARENA_MAX

	## jemalloc: restore MALLOC_CONF
	if [ -n "${__IEP_MALLOC_CONF:-}" ] ; then
		export MALLOC_CONF="${__IEP_MALLOC_CONF}"
	fi
	unset __IEP_MALLOC_CONF
}

iep_preserve_env
iep_prepare_env

## early setup TMPDIR (affects "mktemp")
export TMPDIR=/run/angie/tmp
[ -d "${TMPDIR}" ] || install -d -m 03777 "${TMPDIR}"

## RFC: no need to run entire entrypoint for custom command
# case "$1" in
# angie | */angie ) ;;
# * )
# 	iep_restore_env
# 	exec "$@"
# ;;
# esac

unset __IEP_SRC ; __IEP_SRC="${0##*/}"
. /image-entry.d/00-common.envsh

IEP_INIT=$(gobool_to_int "${IEP_INIT:-0}" 0)
# unexport IEP_INIT
unset x ; x="${IEP_INIT}" ; unset IEP_INIT ; IEP_INIT="$x" ; unset x

IEP_RETAIN_MERGED_TREE=$(gobool_to_int "${IEP_RETAIN_MERGED_TREE:-0}" 0)
IEP_RETAIN_ENV=$(gobool_to_int "${IEP_RETAIN_ENV:-0}" 0)
export IEP_RETAIN_MERGED_TREE IEP_RETAIN_ENV

# IEP_TRACE=$(gobool_to_int "${IEP_TRACE:-0}" 0)
IEP_DEBUG=$(gobool_to_int "${IEP_DEBUG:-0}" 0)
IEP_VERBOSE=$(gobool_to_int "${IEP_VERBOSE:-${IEP_DEBUG}}" "${IEP_DEBUG}")
export IEP_TRACE IEP_DEBUG IEP_VERBOSE

## run parts (if any)
unset __IEP_SCRIPT
while read -r __IEP_SCRIPT ; do
	[ -n "${__IEP_SCRIPT}" ] || continue
	[ -f "${__IEP_SCRIPT}" ] || continue


	case "${__IEP_SCRIPT}" in
	*.envsh )
		if ! [ -x "${__IEP_SCRIPT}" ] ; then
			log "NOT sourcing ${__IEP_SCRIPT} - not executable"
			continue
		fi
		[ "${IEP_TRACE}" = 0 ] || echo "# trace: $(date +'%Y-%m-%d %H:%M:%S.%03N %z'): source ${__IEP_SCRIPT}" >&2
		log "sourcing ${__IEP_SCRIPT}"
		__IEP_SRC="${__IEP_SCRIPT}"
		. "${__IEP_SCRIPT}"
		__IEP_SRC="${0##*/}"
	;;
	* )
		if ! [ -x "${__IEP_SCRIPT}" ] ; then
			log "NOT running ${__IEP_SCRIPT} - not executable"
			continue
		fi
		[ "${IEP_TRACE}" = 0 ] || echo "# trace: $(date +'%Y-%m-%d %H:%M:%S.%03N %z'): run ${__IEP_SCRIPT}" >&2
		log "running ${__IEP_SCRIPT}"
		"${__IEP_SCRIPT}"
	;;
	esac
done <<EOF
$(
	if [ -d /image-entry ] ; then
		overlay-dir-list.sh /image-entry.d /image-entry
	else
		find /image-entry.d/ -follow -type f | sort -V
	fi
)
EOF

[ "${IEP_TRACE}" = 0 ] || echo "# trace: $(date +'%Y-%m-%d %H:%M:%S.%03N %z'): end" >&2

if [ "${IEP_DEBUG}" = 1 ] ; then
	log_always "ready to run application: $*"
else
	log_always "ready to run application"
fi
echo >&2

iep_restore_env

## variables that are not so easily unsettable
unset __IEP_ENV
for i in  '_'  'SHLVL'  ; do
	__IEP_ENV="${__IEP_ENV:-}${__IEP_ENV:+ }-u $i"
done

if [ "${IEP_INIT}" = 0 ] ; then
	exec \
	  ${__IEP_ENV:+ env ${__IEP_ENV} } \
	"$@"
else
	exec \
	  ${__IEP_ENV:+ env ${__IEP_ENV} } \
	  dumb-init ${IEP_DUMB_INIT_ARGS} \
	"$@"
fi