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#!/bin/sh

APKG_CONF="${APKG_CONF:-/etc/apkg.conf}"
temp_repos_file=$(mktemp)

die() {
	[ "$1" ] && echo "error: $1"
	exit 1
}

source_and_sanity_checks() {
[ ! -e $(realpath ${APKG_CONF}) ] && die "There is no configuration file in ${APKG_CONF}! Exiting..."

. "${APKG_CONF}"

[ -z ${APKG_REPO} ] && die "There are no repos configured in $APKG_CONF, exiting..."

for r in ${APKG_REPO}; do printf "%s\n" "$r" >> $(realpath $temp_repos_file); done
printf "%s\n" "Configured repos:" && awk ' {print $0} ' "$temp_repos_file"

cat $temp_repos_file | grep -q "alicelinux/repos/core" > /dev/null || die "No official repos configured,exiting"
}

sync_official() {
	# This assumes the current repo structure.
	dir_for_official_repo=$(cat $temp_repos_file | grep alicelinux/repos/core)
	[ -d "$dir_for_official_repo" ] || die "No $dir_for_official_repo exists, exiting..."
	dir_for_official_repo=$(echo "$dir_for_official_repo" | sed "s/repos\/core//")
	printf "%s\n" "~> Syncing official repos in $dir_for_official repo..." 
	cd "$dir_for_official_repo" || die "Cannot change to the repo directory, exiting..."
	git pull origin main &&  printf "%s\n" "[~> Successfully synced the <official> repo!]"
	
}

sync_or_skip() {
	# Remove all official repo lines from the temp_repos_file
	unofficial_repos=$(grep -v alicelinux/repos "$temp_repos_file" | tr "\n" " ")
	for r in $unofficial_repos; do
		if [ -d "$r"/.git ]; then
			cd "$r" || die "cannot cd to the repo"
			default_remote=$(git branch --list "$(git branch --show-current)" \
			 "--format=%(upstream:remotename)")
			default_branch=$(git remote show "${default_remote}" | sed -n '/HEAD branch/s/.*: //p')
			git pull "$default_remote" "$default_branch"
		else 
			printf "%s\n" "Repo in <$r> is not a git repo, Skipping..."
		fi
	done
}
source_and_sanity_checks
sync_official
sync_or_skip
[ "$?" -eq 0 ] && echo "~> Repo(s) succesfully synced!"