Embed the install manifests in flux binary

- add make target for generating the install manifests using kustomize
- embed the generated manifests in flux binary
- the install and bootstrap commands default to using the embedded manifests
- download the install manifests from GitHub only if the install/bootstrap version arg is set

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

manifests/scripts/bundle.sh

@@ -0,0 +1,70 @@
+#!/usr/bin/env bash
+
+# Copyright 2020 The Flux authors. All rights reserved.
+#
+# 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.
+
+set -e
+
+REPO_ROOT=$(git rev-parse --show-toplevel)
+OUT_PATH=${1:-"${REPO_ROOT}/cmd/flux/manifests"}
+TAR=${2}
+
+info() {
+    echo '[INFO] ' "$@"
+}
+
+fatal() {
+    echo '[ERROR] ' "$@" >&2
+    exit 1
+}
+
+build() {
+  info "building $(basename $2)"
+  kustomize build "$1" > "$2"
+}
+
+if ! [ -x "$(command -v kustomize)" ]; then
+  fatal 'kustomize is not installed'
+fi
+
+rm -rf $OUT_PATH
+mkdir -p $OUT_PATH
+files=""
+
+info using "$(kustomize version --short)"
+
+# build controllers
+for controller in ${REPO_ROOT}/manifests/bases/*/; do
+    output_path="${OUT_PATH}/$(basename $controller).yaml"
+    build $controller $output_path
+    files+=" $(basename $output_path)"
+done
+
+# build rbac
+rbac_path="${REPO_ROOT}/manifests/rbac"
+rbac_output_path="${OUT_PATH}/rbac.yaml"
+build $rbac_path $rbac_output_path
+files+=" $(basename $rbac_output_path)"
+
+# build policies
+policies_path="${REPO_ROOT}/manifests/policies"
+policies_output_path="${OUT_PATH}/policies.yaml"
+build $policies_path $policies_output_path
+files+=" $(basename $policies_output_path)"
+
+# create tarball
+if [[ -n $TAR ]];then
+  info "archiving $TAR"
+  cd ${OUT_PATH} && tar -czf $TAR $files
+fi