Dynamic collection of license files

This allows for the dynamic inclusion of license files
in the built container images.

Author: crunchyheath

.gitignore

@@ -1,3 +1,5 @@
 .DS_Store
 /vendor/
 tools
+licenses/*
+!licenses/LICENSE.txt

Makefile

@@ -90,7 +90,7 @@ images = pgo-apiserver \
 	postgres-operator
 
 .PHONY: all installrbac setup setupnamespaces cleannamespaces \
-	deployoperator cli-docs clean push pull release
+	deployoperator cli-docs clean push pull release license
 
 
 #======= Main functions =======
@@ -114,7 +114,7 @@ deployoperator:
 
 
 #======= Binary builds =======
-build: build-postgres-operator build-pgo-apiserver build-pgo-client build-pgo-rmdata build-pgo-scheduler
+build: build-postgres-operator build-pgo-apiserver build-pgo-client build-pgo-rmdata build-pgo-scheduler license
 
 build-pgo-apiserver:
 	$(GO_BUILD) -o bin/apiserver ./cmd/apiserver
@@ -180,7 +180,7 @@ endif
 
 pgo-base: pgo-base-$(IMGBUILDER)
 
-pgo-base-build: $(PGOROOT)/build/pgo-base/Dockerfile
+pgo-base-build: build $(PGOROOT)/build/pgo-base/Dockerfile
 	$(IMGCMDSTEM) \
 		-f $(PGOROOT)/build/pgo-base/Dockerfile \
 		-t $(PGO_IMAGE_PREFIX)/pgo-base:$(PGO_IMAGE_TAG) \
@@ -230,6 +230,9 @@ clean-deprecated:
 	[ ! -n '$(GOBIN)' ] || rm -f $(GOBIN)/postgres-operator $(GOBIN)/apiserver $(GOBIN)/*pgo
 	[ ! -d bin/postgres-operator ] || rm -r bin/postgres-operator
 
+license:
+	./bin/license_aggregator.sh
+
 push: $(images:%=push-%) ;
 
 push-%:

bin/license_aggregator.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# Copyright 2021 Crunchy Data Solutions, 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.
+
+# Inputs / outputs
+SCAN_DIR=${GOPATH}/pkg/mod
+OUT_DIR=licenses
+
+# Fail on error
+set -e
+
+# Clean up before we start our work
+rm -rf $OUT_DIR/*/
+
+# Get any file in the vendor directory with the word "license" in it.  Note that we'll also keep its path
+myLicenses=$(find $SCAN_DIR -type f | grep -i license)
+for licensefile in $myLicenses
+do
+    # make a new license directory matching the same vendor structure
+    licensedir=$(dirname $licensefile)
+    newlicensedir=$(echo $licensedir | sed "s:$SCAN_DIR:$OUT_DIR:" | sed 's:@[0-9a-zA-Z.\\-]*/:/:' | sed 's:@[0-9a-zA-Z.\\-]*::')
+    mkdir -p $newlicensedir
+    # And, copy over the license
+    cp -f $licensefile $newlicensedir
+done
+
+sudo chmod -R 755 licenses

build/pgo-base/Dockerfile

@@ -21,7 +21,6 @@ LABEL vendor="Crunchy Data" \
 	io.openshift.tags="postgresql,postgres,sql,nosql,crunchy" \
 	io.k8s.description="Trusted open source PostgreSQL-as-a-Service"
 
-COPY redhat/licenses /licenses
 COPY redhat/atomic/help.1 /help.1
 COPY redhat/atomic/help.md /help.md
 COPY licenses /licenses