Add OpenSearch build script

build.gradle

@@ -27,9 +27,16 @@ import java.util.stream.Collectors
 import org.opensearch.gradle.testclusters.OpenSearchCluster
 
 buildscript {
+
     ext {
-        opensearch_version = System.getProperty("opensearch_version", "1.1.0")
+        isSnapshot = "true" == System.getProperty("build.snapshot", "true")
+        opensearch_version = System.getProperty("opensearch.version", "1.1.0")
+        // Taken from https://github.com/opensearch-project/alerting/blob/main/build.gradle#L33
+        // 1.0.0 -> 1.0.0.0, and 1.0.0-SNAPSHOT -> 1.0.0.0-SNAPSHOT
+        opensearch_build = opensearch_version.replaceAll(/(\.\d)([^\d]*)$/, '$1.0$2')
+        common_utils_version = System.getProperty("common_utils.version", opensearch_build)
         kotlin_version = System.getProperty("kotlin.version", "1.3.72")
+
     }
 
     repositories {
@@ -47,12 +54,16 @@ buildscript {
     }
 }
 
-
 plugins {
     id 'nebula.ospackage' version "8.3.0"
     id "com.dorongold.task-tree" version "1.5"
 }
 
+allprojects {
+    group = "org.opensearch"
+    version = "${opensearch_version}"
+}
+
 apply plugin: 'java'
 apply plugin: 'jacoco'
 apply plugin: 'idea'
@@ -91,7 +102,7 @@ dependencies {
     compile "org.jetbrains:annotations:13.0"
     compile "com.github.seancfoley:ipaddress:5.3.3"
     compile "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.5"
-    compile "org.opensearch:common-utils:${version}"
+    compile "org.opensearch:common-utils:${common_utils_version}"
 
     testCompile "org.opensearch.test:framework:${opensearch_version}"
     testImplementation "org.assertj:assertj-core:3.17.2"
@@ -104,6 +115,7 @@ repositories {
     mavenLocal()
     mavenCentral()
     maven { url "https://plugins.gradle.org/m2/" }
+    jcenter()
 }
 
 compileKotlin {
@@ -132,6 +144,12 @@ opensearchplugin {
     classname = "org.opensearch.replication.ReplicationPlugin"
 }
 
+artifacts {
+    if (!isSnapshot) {
+        archives sourcesJar
+        archives javadocJar
+    }
+}
 
 javadoc.enabled = false
 licenseHeaders.enabled = false

build.sh

@@ -0,0 +1,68 @@
+#!/bin/bash
+
+# Copyright OpenSearch Contributors.
+# SPDX-License-Identifier: Apache-2.0
+
+set -ex
+
+function usage() {
+    echo "Usage: $0 [args]"
+    echo ""
+    echo "Arguments:"
+    echo -e "-v VERSION\t[Required] OpenSearch version."
+    echo -e "-s SNAPSHOT\t[Optional] Build a snapshot, default is 'false'."
+    echo -e "-a ARCHITECTURE\t[Optional] Build architecture, ignored."
+    echo -e "-o OUTPUT\t[Optional] Output path, default is 'artifacts'."
+    echo -e "-h help"
+}
+
+while getopts ":h:v:s:o:a:" arg; do
+    case $arg in
+        h)
+            usage
+            exit 1
+            ;;
+        v)
+            VERSION=$OPTARG
+            ;;
+        s)
+            SNAPSHOT=$OPTARG
+            ;;
+        o)
+            OUTPUT=$OPTARG
+            ;;
+        a)
+            ARCHITECTURE=$OPTARG
+            ;;
+        :)
+            echo "Error: -${OPTARG} requires an argument"
+            usage
+            exit 1
+            ;;
+        ?)
+            echo "Invalid option: -${arg}"
+            exit 1
+            ;;
+    esac
+done
+
+if [ -z "$VERSION" ]; then
+    echo "Error: You must specify the OpenSearch version"
+    usage
+    exit 1
+fi
+
+[[ "$SNAPSHOT" == "true" ]] && VERSION=$VERSION-SNAPSHOT
+[ -z "$OUTPUT" ] && OUTPUT=artifacts
+
+mkdir -p $OUTPUT/plugins
+
+./gradlew assemble --no-daemon --refresh-dependencies -DskipTests=true -Dopensearch.version=$VERSION -Dbuild.snapshot=$SNAPSHOT
+
+zipPath=$(find . -path \*build/distributions/*.zip)
+distributions="$(dirname "${zipPath}")"
+
+echo "COPY ${distributions}/*.zip"
+cp ${distributions}/*.zip ./$OUTPUT/plugins
+
+./gradlew publishToMavenLocal -Dopensearch.version=$VERSION -Dbuild.snapshot=$SNAPSHOT