[License] Add SPDX and OpenSearch Modification license header (#509)

This commit adds the SPDX Apache-2.0 license header along with an additional
copyright header for all modifications.

Signed-off-by: Nicholas Walter Knize <nknize@apache.org>

.ci/java-versions.properties

@@ -1,3 +1,14 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# The OpenSearch Contributors require contributions made to
+# this file be licensed under the Apache-2.0 license or a
+# compatible open source license.
+#
+# Modifications Copyright OpenSearch Contributors. See
+# GitHub history for details.
+#
+
 # This .properties file defines the versions of Java with which to
 # build and test OpenSearch for this branch. Valid Java versions
 # are 'java' or 'openjdk' followed by the major release number.

benchmarks/build.gradle

@@ -1,4 +1,13 @@
-import org.opensearch.gradle.info.BuildParams
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
 
 /*
  * Licensed to Elasticsearch under one or more contributor
@@ -19,6 +28,8 @@ import org.opensearch.gradle.info.BuildParams
  * under the License.
  */
 
+import org.opensearch.gradle.info.BuildParams
+
 apply plugin: 'opensearch.build'
 apply plugin: 'application'
 mainClassName = 'org.openjdk.jmh.Main'

benchmarks/src/main/java/org/opensearch/benchmark/fs/AvailableIndexFoldersBenchmark.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.benchmark.fs;
 
 import org.opensearch.common.logging.LogConfigurator;

benchmarks/src/main/java/org/opensearch/benchmark/indices/breaker/MemoryStatsBenchmark.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.benchmark.indices.breaker;
 
 import org.openjdk.jmh.annotations.Benchmark;

benchmarks/src/main/java/org/opensearch/benchmark/routing/allocation/AllocationBenchmark.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.benchmark.routing.allocation;
 
 import org.opensearch.Version;

benchmarks/src/main/java/org/opensearch/benchmark/routing/allocation/Allocators.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.benchmark.routing.allocation;
 
 import org.opensearch.Version;

benchmarks/src/main/java/org/opensearch/benchmark/search/aggregations/TermsReduceBenchmark.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.benchmark.search.aggregations;
 
 import org.apache.lucene.search.ScoreDoc;

benchmarks/src/main/java/org/opensearch/benchmark/search/aggregations/bucket/terms/LongKeyedBucketOrdsBenchmark.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.benchmark.search.aggregations.bucket.terms;
 
 import org.opensearch.common.settings.Settings;

benchmarks/src/main/java/org/opensearch/benchmark/search/aggregations/bucket/terms/StringTermsSerializationBenchmark.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.benchmark.search.aggregations.bucket.terms;
 
 import org.apache.lucene.util.BytesRef;

benchmarks/src/main/java/org/opensearch/benchmark/time/DateFormatterBenchmark.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.benchmark.time;
 
 import org.opensearch.common.joda.Joda;

benchmarks/src/main/java/org/opensearch/benchmark/time/DateFormatterFromBenchmark.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.benchmark.time;
 
 import org.opensearch.common.time.DateFormatter;

benchmarks/src/main/java/org/opensearch/benchmark/time/RoundingBenchmark.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.benchmark.time;
 
 import org.opensearch.common.Rounding;

benchmarks/src/main/java/org/opensearch/common/RoundingBenchmark.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.common;
 
 import org.opensearch.common.time.DateFormatter;

benchmarks/src/main/resources/log4j2.properties

@@ -1,3 +1,14 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# The OpenSearch Contributors require contributions made to
+# this file be licensed under the Apache-2.0 license or a
+# compatible open source license.
+#
+# Modifications Copyright OpenSearch Contributors. See
+# GitHub history for details.
+#
+
 appender.console.type = Console
 appender.console.name = console
 appender.console.layout.type = PatternLayout

build.gradle

@@ -1,3 +1,14 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/build.gradle

@@ -1,3 +1,14 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/reaper/build.gradle

@@ -1,3 +1,14 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 apply plugin: 'java'
 
 jar {

buildSrc/reaper/src/main/java/org/opensearch/gradle/reaper/Reaper.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle.reaper;
 
 import java.io.Closeable;

buildSrc/settings.gradle

@@ -1 +1,12 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 include 'reaper'

buildSrc/src/integTest/groovy/org/opensearch/gradle/DistributionDownloadPluginFuncTest.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/integTest/groovy/org/opensearch/gradle/JdkDownloadPluginFuncTest.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/integTest/groovy/org/opensearch/gradle/OpenSearchJavaPluginFuncTest.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/integTest/groovy/org/opensearch/gradle/OpenSearchTestBasePluginFuncTest.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/integTest/groovy/org/opensearch/gradle/TestClustersPluginFuncTest.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/integTest/groovy/org/opensearch/gradle/fixtures/AbstractGradleFuncTest.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/integTest/groovy/org/opensearch/gradle/fixtures/DistributionDownloadFixture.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/integTest/groovy/org/opensearch/gradle/fixtures/WiremockFixture.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/integTest/groovy/org/opensearch/gradle/internal/InternalBwcGitPluginFuncTest.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/integTest/groovy/org/opensearch/gradle/internal/InternalDistributionArchiveCheckPluginFuncTest.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/integTest/groovy/org/opensearch/gradle/internal/InternalDistributionArchiveSetupPluginFuncTest.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/integTest/groovy/org/opensearch/gradle/internal/InternalDistributionBwcSetupPluginFuncTest.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/integTest/groovy/org/opensearch/gradle/internal/InternalDistributionDownloadPluginFuncTest.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/integTest/java/org/opensearch/gradle/BuildPluginIT.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.apache.commons.io.FileUtils;

buildSrc/src/integTest/java/org/opensearch/gradle/ExportOpenSearchBuildResourcesTaskIT.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.opensearch.gradle.test.GradleIntegrationTestCase;

buildSrc/src/integTest/java/org/opensearch/gradle/ReaperPluginIT.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.opensearch.gradle.test.GradleIntegrationTestCase;

buildSrc/src/integTest/java/org/opensearch/gradle/precommit/TestingConventionsTasksIT.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle.precommit;
 
 import org.opensearch.gradle.test.GradleIntegrationTestCase;

buildSrc/src/integTest/java/org/opensearch/gradle/precommit/ThirdPartyAuditTaskIT.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle.precommit;
 
 import org.opensearch.gradle.test.GradleIntegrationTestCase;

buildSrc/src/integTest/java/org/opensearch/gradle/tar/SymbolicLinkPreservingTarIT.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle.tar;
 
 import org.apache.commons.compress.archivers.tar.TarArchiveEntry;

buildSrc/src/integTest/resources/org/opensearch/gradle/internal/fake_git/remote/.ci/java-versions.properties

@@ -1,3 +1,14 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# The OpenSearch Contributors require contributions made to
+# this file be licensed under the Apache-2.0 license or a
+# compatible open source license.
+#
+# Modifications Copyright OpenSearch Contributors. See
+# GitHub history for details.
+#
+
 #
 # Licensed to Elasticsearch under one or more contributor
 # license agreements. See the NOTICE file distributed with

buildSrc/src/integTest/resources/org/opensearch/gradle/internal/fake_git/remote/distribution/archives/build.gradle

@@ -1,3 +1,14 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/integTest/resources/org/opensearch/gradle/internal/fake_git/remote/distribution/archives/darwin-tar/build.gradle

@@ -1,3 +1,14 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/integTest/resources/org/opensearch/gradle/internal/fake_git/remote/settings.gradle

@@ -1,3 +1,14 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/AntTask.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/BuildPlugin.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/DependenciesInfoPlugin.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/DependenciesInfoTask.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/FileContentsTask.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/MavenFilteringHack.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/NoticeTask.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/ResolveAllDependencies.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.gradle.api.DefaultTask;

buildSrc/src/main/groovy/org/opensearch/gradle/doc/DocsTestPlugin.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/doc/RestTestsFromSnippetsTask.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/doc/SnippetsTask.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/plugin/PluginBuildPlugin.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/precommit/LicenseHeadersPrecommitPlugin.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/precommit/LicenseHeadersTask.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -125,6 +135,7 @@ class LicenseHeadersTask extends AntTask {
             substringMatcher(licenseFamilyCategory: "SPDX ",
                 licenseFamilyName:     "SPDX") {
                 // Apache license (OpenSearch)
+                pattern(substring: "SPDX-License-Identifier: Apache-2.0")
                 pattern(substring: "Copyright OpenSearch Contributors.")
             }
 

buildSrc/src/main/groovy/org/opensearch/gradle/precommit/PrecommitTasks.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/test/AntFixture.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/test/ClusterConfiguration.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/test/ClusterFormationTasks.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/test/NodeInfo.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/test/RestTestPlugin.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/test/StandaloneRestTestPlugin.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/test/StandaloneTestPlugin.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/test/TestWithDependenciesPlugin.groovy

@@ -1,3 +1,13 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with

buildSrc/src/main/groovy/org/opensearch/gradle/test/TestWithSslPlugin.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle.test;
 
 import org.opensearch.gradle.ExportOpenSearchBuildResourcesTask;

buildSrc/src/main/java/org/opensearch/gradle/AbstractLazyPropertyCollection.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import java.util.List;

buildSrc/src/main/java/org/opensearch/gradle/Architecture.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 public enum Architecture {

buildSrc/src/main/java/org/opensearch/gradle/BwcVersions.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import java.util.ArrayList;

buildSrc/src/main/java/org/opensearch/gradle/ConcatFilesTask.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import java.io.File;

buildSrc/src/main/java/org/opensearch/gradle/DistributionDependency.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 public interface DistributionDependency {

buildSrc/src/main/java/org/opensearch/gradle/DistributionDownloadPlugin.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.opensearch.gradle.OpenSearchDistribution.Platform;

buildSrc/src/main/java/org/opensearch/gradle/DistributionResolution.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.gradle.api.Project;

buildSrc/src/main/java/org/opensearch/gradle/DockerBase.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 /**

buildSrc/src/main/java/org/opensearch/gradle/EmptyDirTask.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import java.io.File;

buildSrc/src/main/java/org/opensearch/gradle/ExportOpenSearchBuildResourcesTask.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.gradle.api.DefaultTask;

buildSrc/src/main/java/org/opensearch/gradle/FileSupplier.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import java.io.File;

buildSrc/src/main/java/org/opensearch/gradle/FileSystemOperationsAware.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.gradle.api.tasks.WorkResult;

buildSrc/src/main/java/org/opensearch/gradle/Jdk.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.gradle.api.Buildable;

buildSrc/src/main/java/org/opensearch/gradle/JdkDownloadPlugin.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.opensearch.gradle.transform.SymbolicLinkPreservingUntarTransform;

buildSrc/src/main/java/org/opensearch/gradle/LazyFileOutputStream.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import java.io.File;

buildSrc/src/main/java/org/opensearch/gradle/LazyPropertyList.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.gradle.api.tasks.Input;

buildSrc/src/main/java/org/opensearch/gradle/LazyPropertyMap.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.gradle.api.Named;

buildSrc/src/main/java/org/opensearch/gradle/LoggedExec.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.gradle.api.Action;

buildSrc/src/main/java/org/opensearch/gradle/LoggingOutputStream.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import java.io.IOException;

buildSrc/src/main/java/org/opensearch/gradle/OS.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import java.util.Arrays;

buildSrc/src/main/java/org/opensearch/gradle/OpenSearchDistribution.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.opensearch.gradle.docker.DockerSupportService;

buildSrc/src/main/java/org/opensearch/gradle/OpenSearchJavaPlugin.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar;

buildSrc/src/main/java/org/opensearch/gradle/OpenSearchTestBasePlugin.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import com.github.jengelman.gradle.plugins.shadow.ShadowBasePlugin;

buildSrc/src/main/java/org/opensearch/gradle/PropertyNormalization.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 public enum PropertyNormalization {

buildSrc/src/main/java/org/opensearch/gradle/PublishPlugin.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import com.github.jengelman.gradle.plugins.shadow.ShadowBasePlugin;

buildSrc/src/main/java/org/opensearch/gradle/ReaperPlugin.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.opensearch.gradle.info.GlobalBuildInfoPlugin;

buildSrc/src/main/java/org/opensearch/gradle/ReaperService.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.opensearch.gradle.info.BuildParams;

buildSrc/src/main/java/org/opensearch/gradle/RepositoriesSetupPlugin.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.gradle.api.GradleException;

buildSrc/src/main/java/org/opensearch/gradle/SimpleCommandLineArgumentProvider.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.gradle.process.CommandLineArgumentProvider;

buildSrc/src/main/java/org/opensearch/gradle/SystemPropertyCommandLineArgumentProvider.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import org.gradle.api.tasks.Input;

buildSrc/src/main/java/org/opensearch/gradle/Version.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import java.util.Objects;

buildSrc/src/main/java/org/opensearch/gradle/VersionProperties.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -16,6 +24,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle;
 
 import java.io.IOException;

buildSrc/src/main/java/org/opensearch/gradle/checkstyle/SnippetLengthCheck.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle.checkstyle;
 
 import com.puppycrawl.tools.checkstyle.api.AbstractFileSetCheck;

buildSrc/src/main/java/org/opensearch/gradle/dependencies/CompileOnlyResolvePlugin.java

@@ -1,3 +1,11 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,6 +25,11 @@
  * under the License.
  */
 
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
 package org.opensearch.gradle.dependencies;
 
 import org.gradle.api.NamedDomainObjectProvider;