portsync

#!/bin/sh
#
#  scratchpkg
#
#  Copyright (c) 2018 by Emmett1  (emmett1.2miligrams@gmail.com)
#
#  This program is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program.  If not, see <https://www.gnu.org/licenses/>.
#

cmp_copy() {
	# usage:
	#   cmp_copy <source dir> <target dir>
	#
	reponame=${2##*/}
	echo "Updating repository $(basename $reponame)"
	for p in $1/*; do
		[ -d $p ] || continue
		pname=${p##*/}
		if [ ! -d $2/$pname ]; then
			mkdir -p $2/$pname
			for f in $p/* $p/.pkgfiles $p/.checksums; do
				[ -f $f ] || continue
				case $f in
					*/update) continue;;
				esac
				fname=${f##*/}
				echo " New: $reponame/$pname/$fname"
				cp $f $2/$pname/$fname
			done		
		else
			for f in $p/* $p/.pkgfiles $p/.checksums; do
				[ -f $f ] || continue
				case $f in
					*/update) continue;;
				esac
				fname=${f##*/}
				cmp -s $f $2/$pname/$fname || {
					echo " Edit: $reponame/$pname/$fname"
					cp $f $2/$pname/$fname
				}
			done
		fi
	done
	for p in $2/*; do
		[ -d $p ] || continue
		pname=${p##*/}
		for f in $p/* $p/.pkgfiles $p/.checksums; do
			[ -f $f ] || continue
			fname=${f##*/}
			if [ ! -f $1/$pname/$fname ]; then
				echo " Removed: $reponame/$pname/$fname"
				rm $2/$pname/$fname
			fi
		done
		if [ ! -d $1/$pname ]; then
			rmdir $2/$pname
		fi
	done
	echo "Finished successfully"
}

github_sync() {
	# usage:
	#   github_sync <github url> <target dir>
	#
	dir=$2
	repo=${dir##*/}
	url=$(echo $1 | cut -d / -f -5)
	branch=$(echo $1 | cut -d / -f 7)
	tarball=/tmp/$repo
	echo "Fetching from $1"
	curl --silent -LJ -o $tarball.tar.xz $url/tarball/$branch || {
		echo "Failed fetching repo from $1"
		exit 1
	}
	tar -tf $tarball.tar.xz >/dev/null 2>&1 || {
		echo "Tarball from $1 corrupted"
		exit 1
	}
	portname=$(tar -tf $tarball.tar.xz 2>/dev/null | head -n1 | cut -d / -f1)
	tar -xf $tarball.tar.xz -C /tmp
	if [ ! "$portname" ] || [ -d "$repo" ]; then
		echo "Failed sync $repo repo"
		exit 1
	fi
	cmp_copy /tmp/$portname/$repo $dir
	rm -f $tarball.tar.xz
	rm -fr /tmp/$portname
}

httpup_sync() {
	# usage:
	#   httpup_sync <url> <target dir>
	#
	command -v httpup >/dev/null 2>&1 || {
		echo "httpup not found."
		exit 1
	}
	httpup sync $1 $2 || {
		echo "Failed sync from $1"
		exit 1
	}
}

REPO_FILE=/etc/scratchpkg.repo
	
if [ ! -e "$REPO_FILE" ]; then
	echo "Repo file not found! ($REPO_FILE)"
	exit 1
fi

if [ "$(id -u)" != 0 ]; then
	echo "This operation need root access."
	exit 1
fi

grep -Ev '^(#|$)' "$REPO_FILE" | awk '{print $1,$2}' | while read -r repodir repourl; do
	if [ "$repodir" ] && [ "$repourl" ]; then
		case $repourl in
			*github.com*) github_sync $repourl $repodir;;
			           *) httpup_sync $repourl $repodir;;
		esac
	fi
done

exit 0