Add wrapper script for opm

opm does not allow multiple authentications in the same registry, e.g.
quay.io, quay.io/ns, quay.io/ns/repo as reported in operator-framework/operator-registry#935

The wrapper will split the auths and try one at a time to attempt the
authentication.

Change-Id: If7daa16647f295697a887585f7d03454ba5b1207

utils/opm-auths

@@ -0,0 +1,91 @@
+#!/bin/bash
+#
+# Copyright (C) 2023 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+
+function help(){
+    echo "$(basename "${0}") <opm_path> <opm_args>"
+    echo
+    echo "A wrapper to allow opm to use multiple auths in the same registry"
+    echo "Example: quay.io, quay.io/namespace, quay.io/namespace/repo"
+    # https://github.com/operator-framework/operator-registry/issues/935
+    echo
+    echo "Options:"
+    echo "  opm_path:     The path to opm binary"
+    echo "  opm_args:     Arguments to pass to opm"
+    echo
+    echo "Env:"
+    echo "  DOCKER_CONFIG: The directory with a docker config file (config.json)"
+    echo "                 Default: ~/.docker/config.json"
+    echo
+}
+
+function loop_auths() {
+    tmp_docker_config=$(mktemp -d)
+    result=1
+    auths=$(jq -r '.auths | keys[]' "${docker_config_file}")
+    # shellcheck disable=SC2068
+    for auth in ${auths[@]}; do
+        jq -r '.auths."'"${auth}"'" | {auths: {"'"${auth}"'": {auth: .auth}}}' "${docker_config_file}" \
+        >"${tmp_docker_config}/config.json"
+        # shellcheck disable=SC2086
+        if ! DOCKER_CONFIG="${tmp_docker_config}" "${opm}" ${opm_args}; then
+            continue
+        else
+            result=0
+            break
+        fi
+    done
+
+    rm -Rf "${tmp_docker_config}"
+    if [[ ${result} != 0 ]]; then
+        echo "Error: Unable to authenticate with any credential" >&2
+        exit 1
+    fi
+}
+
+if [[ $# -lt 1 ]]; then
+    echo "Error: Missing opm path" >&2
+    help
+    exit 1
+fi
+
+opm="${1}"
+if [[ ! -x ${opm} ]]; then
+    echo "Error: ${opm} can't execute, skipping" >&2
+    exit 1
+fi
+
+opm_args="${*:2}"
+if [[ -n "${DOCKER_CONFIG}" ]]; then
+    docker_config_file="${DOCKER_CONFIG}/config.json"
+else
+    docker_config_file="${HOME}/.docker/config.json"
+fi
+
+# Run without DOCKER_CONFIG
+if [[ ! -r ${docker_config_file} ]]; then
+    # shellcheck disable=SC2086
+    "${opm}" ${opm_args}
+    exit $?
+fi
+
+# Run with DOCKER_CONFIG
+# shellcheck disable=SC2086
+if ! DOCKER_CONFIG="${DOCKER_CONFIG}" "${opm}" ${opm_args}; then
+    loop_auths
+else
+    exit 0
+fi