ci: add dependency list completeness check

.kokoro/completeness-check.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+# Copyright 2020 Google LLC
+#
+# 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 -eo pipefail
+
+## Helper functions
+function now() { date +"%Y-%m-%d %H:%M:%S" | tr -d '\n'; }
+function msg() { println "$*" >&2; }
+function println() { printf '%s\n' "$(now) $*"; }
+
+## Run dependency list completeness check
+function completenessCheck() {
+  # Output dep list with compile scope generated using the original pom
+  msg "Generating dependency list using original pom..."
+  mvn dependency:list -f pom.xml -Dsort=true | grep '\[INFO]    .*:.*:.*:.*:.*' | grep -v ':test$' >.org-list.txt || true # continue without error if list is empty
+
+  # Output dep list generated using the flattened pom (test scope deps are ommitted)
+  msg "Generating dependency list using flattened pom..."
+  mvn dependency:list -f .flattened-pom.xml -Dsort=true | grep '\[INFO]    .*:.*:.*:.*:.*' >.new-list.txt || true # continue without error if list is empty
+
+  # Compare two dependency lists
+  msg "Comparing dependency lists..."
+  diff .org-list.txt .new-list.txt >.diff.txt
+  if [[ $? == 0 ]]
+    then
+      msg "Success. No diff!"
+  else
+    msg "Diff found. Check .diff.txt file located in $1."
+    return 1
+  fi
+}

.kokoro/dependencies.sh

@@ -36,3 +36,29 @@ retry_with_backoff 3 10 \
     -Dclirr.skip=true
 
 mvn -B dependency:analyze -DfailOnWarning=true
+
+echo "****************** DEPENDENCY LIST COMPLETENESS CHECK *******************"
+source ${scriptDir}/completeness-check.sh
+
+# Allow failures to continue running the script
+set +e
+error_count=0
+
+for path in $(find -name ".flattened-pom.xml")
+do
+  # Check flattened pom in each dir that contains it for completeness
+  dir=$(dirname "$path")
+  pushd "$dir"
+  completenessCheck "$dir"
+  error_count=$(($error_count + $?))
+  popd
+done
+
+if [[ $error_count == 0 ]]
+then
+  msg "All checks passed."
+  exit 0
+else
+  msg "Errors found. See log statements above."
+  exit 1
+fi