#!/bin/sh
# Author: Mikhail Novosyolov <m.novosyolov@rosalinux.ru>
# This script tries to "solve" problems with bootstrapping chroot,
# where urpmi fails due to failed dependencies,
# but, if we run it for multiple times, it does bootstrap all required packages.
# Unfortunately, we currently don't have enought time to solve bootstrapping issues properly,
# so let's make this ugly hack.
# Sometimes it's possible to understand which dependencies fail,
# bacause the last iteration after several failed ones will install those failing packages.
# I previously made this hack in
# https://github.com/mikhailnov/docker-rosa/blob/master/mkimage-urpmi.sh
set -xefu

urpmi_exec(){
	urpmi \
		--urpmi-root "$urpmiRoot" \
		--root "$rpmRoot" \
		--debug \
		${urpmi_options} \
		${packagesList}
	urpmi_return_code="$?"
}

urpmi_bootstrap(){
	for urpmi_options in \
		"--auto --no-suggests --allow-force --allow-nodeps --split-length 500" \
		"--auto --no-suggests"
	do
		urpmi_exec
	done
}

process_packages(){

	# This will validate that all requested packages do exist
	# and will print a list of not existing ones.
	# Returns 0 only if all packages do exist.
	urpmq --whatprovides --urpmi-root "$urpmiRoot" ${packagesList} >/dev/null

	# temporarily don't fail the whole scripts when not last iteration of urpmi fails
	set +e
	for i in $(seq 1 5)
	do
		echo "Starting urpmi bootstrap iteration #${i}..."
		urpmi_bootstrap
		if [ "${urpmi_return_code}" = 0 ]
		then
			echo "urpmi iteration #${i} was successfull."
			break
		else
			echo "urpmi iteration #${i} failed."
		fi
	done
	# now check the return code of the _last_ urpmi iteration
	if [ "${urpmi_return_code}" != 0 ]; then
		echo "urpmi bootstrapping failed!"
		if [ "$EXIT" = 1 ]; then exit "${urpmi_return_code}"; fi
		return "${urpmi_return_code}"
	fi
	# return failing the whole script on any error
	set -e
}

packagesList_orig="${packagesList}"

# bootstrap basesystem first (it's not really necessary, but let's do it)
if echo "${packagesList_orig}" | grep -qE 'basesystem | basesystem'; then
	( packagesList="$(echo "${packagesList_orig}" | tr ' ' '\n' | grep ^basesystem | tr '\n' ' ')"
	# Exit the whole script if even bootstrapping basesystem failed
	EXIT=1
	process_packages )
fi

# now let's try to bootstrap the whole list of packages
packagesList="${packagesList_orig}"
EXIT=0
process_packages
# exit if all packages have been installed
if [ "$urpmi_return_code" = 0 ]; then exit 0; fi

# If installing packages still failed, let's try to install them one-by-one
for i in $(echo "${packagesList_orig}" | sort -u)
do
	( set +e
	packagesList="$i"
	urpmi_options="--auto --no-suggests --allow-force --allow-nodeps"
	urpmi_exec
	set -e )
done

# Now, regardless success of installing one-by-one, let's install all packages and see if it will be successfull
# and exit with error, if it failed
packagesList="${packagesList_orig}"
EXIT=1
process_packages