From adb27df4349fd75d2f8d885ad310eb574891fbda Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Thu, 20 Aug 2020 15:55:40 +0200
Subject: add configure-mirror

---
 Dockerfile       |  5 ++++-
 configure-mirror | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+), 1 deletion(-)
 create mode 100755 configure-mirror

diff --git a/Dockerfile b/Dockerfile
index 7a1923f..6edff80 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,12 +9,15 @@ LABEL maintainer="Gerd Hoffmann <kraxel@redhat.com>" \
 
 USER root
 
-RUN dnf update -y && \
+COPY configure-mirror /usr/local/bin
+RUN /usr/local/bin/configure-mirror && \
+    dnf update -y && \
     dnf install -y \
 	'dnf-command(builddep)' \
 	'dnf-command(config-manager)' \
         https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm \
 	&& \
+    /usr/local/bin/configure-mirror && \
     dnf config-manager --set-enabled PowerTools && \
     dnf install -y \
 	fedora-packager tito \
diff --git a/configure-mirror b/configure-mirror
new file mode 100755
index 0000000..a66ec01
--- /dev/null
+++ b/configure-mirror
@@ -0,0 +1,49 @@
+#!/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=${furl}|baseurl=${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
-- 
cgit