#!/bin/sh

function set_baseurl() {
    local furl="$1"
    local turl="$2"
    local name="$3"
    local file

    if test "$turl" = ""; then
	echo "# no mirror: $furl (env \$$name)"
	return
    fi

    for file in /etc/yum.repos.d/*.repo; do
	if test ! -f "${file}.dist"; then
	    cp "${file}" "${file}.dist"
	fi
	grep -q -e "baseurl=$furl" "${file}.dist" || continue
	echo "# mirror: $furl -> $turl ($file)"
	sed	-e 's/^mirrorlist/#mirrorlist/' \
		-e 's/^metalink/#metalink/' \
		-e 's/^#baseurl/baseurl/' \
		-e 's/^# baseurl/baseurl/' \
		-e "s|baseurl=${furl}|baseurl=${turl}|" \
		< "${file}.dist" > "$file"
    done
}

#
# use fixed (configurable) mirror.
# be cache proxy friendly.
#
set_baseurl http://mirror.centos.org/centos/                    "${CENTOS_MIRROR}" CENTOS_MIRROR
set_baseurl http://download.fedoraproject.org/pub/epel/         "${EPEL_MIRROR}"   EPEL_MIRROR
set_baseurl http://download.fedoraproject.org/pub/fedora/linux/ "${FEDORA_MIRROR}" FEDORA_MIRROR
set_baseurl http://download.example/pub/fedora/linux/           "${FEDORA_MIRROR}" FEDORA_MIRROR

#
# no parallel downloads please.
#
if test -f /etc/dnf/dnf.conf; then
    grep -q max_parallel_downloads /etc/dnf/dnf.conf ||\
        echo max_parallel_downloads=1 >> /etc/dnf/dnf.conf
fi
if test -f /etc/yum.conf; then
    grep -q max_connections /etc/yum.conf ||\
        echo max_connections=1 >> /etc/yum.conf
fi

exit 0