Set EPEL mirror during openstack-ci-mirrors

We want to set DIB_EPEL_MIRROR for the epel element, which means we
need access to the CI mirror info script in the chroot.  Copy it into
the temp directory with extra-data.d and update the environment file
to find it.

Change-Id: Ia12f0cbdeb194eef3155497ceb5ffc4a452aad76

diskimage_builder/elements/openstack-ci-mirrors/environment.d/11-dib-distribution-mirror.bash

@@ -1,30 +1,41 @@
-# Set DIB_DISTRIBUTION_MIRROR if running in openstack gate
+# Set DIB_DISTRIBUTION_MIRROR and related if running in openstack gate
+
+# don't spam logs with this source
+_xtrace=$(set +o | grep xtrace)
+set +o xtrace
+
 if [ -f /etc/ci/mirror_info.sh ]; then
+    # outside chroot
+    mirror_info=/etc/ci/mirror_info.sh
+elif [ -f /tmp/in_target.d/mirror_info.sh ]; then
+    # inside chroot
+    mirror_info=/tmp/in_target.d/mirror_info.sh
+else
+    echo "No mirror file found.  Not an OpenStack CI node?"
+    return 0
+fi
 
-    # don't spam logs with this source
-    _xtrace=$(set +o | grep xtrace)
-    set +o xtrace
-    source /etc/ci/mirror_info.sh
-    $_xtrace
+source $mirror_info
+$_xtrace
 
-    # note 11- is after 10- which is where DISTRO_NAME is set usually
+# note 11- is after 10- which is where DISTRO_NAME is set usually
 
-    if [[ "${DISTRO_NAME}" == "ubuntu" ]]; then
+if [[ "${DISTRO_NAME}" == "ubuntu" ]]; then
     export DIB_DISTRIBUTION_MIRROR=$NODEPOOL_UBUNTU_MIRROR
     export DIB_DEBOOTSTRAP_EXTRA_ARGS+=" --no-check-gpg"
-    elif [[ "${DISTRO_NAME}" == "debian" ]]; then
+elif [[ "${DISTRO_NAME}" == "debian" ]]; then
     export DIB_DISTRIBUTION_MIRROR=$NODEPOOL_DEBIAN_MIRROR
     export DIB_DEBOOTSTRAP_EXTRA_ARGS+=" --no-check-gpg"
-    elif [[ "${DISTRO_NAME}" == "fedora" ]]; then
+elif [[ "${DISTRO_NAME}" == "fedora" ]]; then
     export DIB_DISTRIBUTION_MIRROR=$NODEPOOL_FEDORA_MIRROR
-    elif [[ "${DISTRO_NAME}" == "centos" ]]; then
+elif [[ "${DISTRO_NAME}" == "centos" ]]; then
     export DIB_DISTRIBUTION_MIRROR=$NODEPOOL_CENTOS_MIRROR
-    elif [[ "${DISTRO_NAME}" == "centos7" ]]; then
+    export DIB_EPEL_MIRROR=$NODEPOOL_EPEL_MIRROR
+elif [[ "${DISTRO_NAME}" == "centos7" ]]; then
     export DIB_DISTRIBUTION_MIRROR=$NODEPOOL_CENTOS_MIRROR
-    elif [[ "${DISTRO_NAME}" == "opensuse" ]]; then
+    export DIB_EPEL_MIRROR=$NODEPOOL_EPEL_MIRROR
+elif [[ "${DISTRO_NAME}" == "opensuse" ]]; then
     export DIB_DISTRIBUTION_MIRROR=$NODEPOOL_OPENSUSE_MIRROR
-    fi
-
 fi
 
 # Infra doesn't mirror non-free repos, so instruct to ignore these
@@ -42,3 +53,4 @@ if [[ -d ${WORKSPACE:-/not/a/path/}/dib-mirror ]]; then
     fi
 
 fi
+

diskimage_builder/elements/openstack-ci-mirrors/extra-data.d/75-copy-mirror-info

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
+    set -x
+fi
+set -eu
+set -o pipefail
+
+# On infra nodes, make a copy of the mirror_info.sh script inside the
+# chroot for elements running in chroot like EPEL that want to
+# reference it.
+mirror_info=/etc/ci/mirror_info.sh
+
+if [ -f $mirror_info ]; then
+    cp /etc/ci/mirror_info.sh $TMP_HOOKS_PATH/mirror_info.sh
+fi
+