Extract message stashing and unstashing into a class. (#924)

* Extract message stashing and unstashing into a class, add unit tests.

Signed-off-by: dblock <dblock@amazon.com>

* Added test pipeline for gathering parallel stage messages.

Signed-off-by: dblock <dblock@amazon.com>

* Added a test script that replicates OpenSearch Jenkinsfile but with echo instead of sh.

Signed-off-by: dblock <dblock@amazon.com>

* Update developer guide with Groovy code prerequisites.

Signed-off-by: dblock <dblock@amazon.com>

* Fill out testMessages unit test.

Signed-off-by: dblock <dblock@amazon.com>

* Simplify gradle defaults.

Signed-off-by: dblock <dblock@amazon.com>

* Reorganized tests and added placeholders.

Signed-off-by: dblock <dblock@amazon.com>

.github/workflows/groovy-tests.yml

@@ -0,0 +1,16 @@
+name: groovy-tests
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup Java
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+      - uses: actions/checkout@v2
+      - name: Run Tests
+        run: |
+          ./gradlew test --info

.github/workflows/tests.yml → .github/workflows/python-tests.yml

@@ -1,4 +1,4 @@
-name: tests
+name: python-tests
 
 on: [push, pull_request]
 

.gitignore

@@ -12,10 +12,12 @@ coverage.xml
 
 .gradle/
 .settings/
+/build/
 out.txt
 
 /builds/
 /dist/
 /test-results/
 
-/.vscode/
+/.vscode/
+

.groovylintrc.json

@@ -0,0 +1,8 @@
+{
+    "extends": "recommended",
+    "rules": {
+        "CompileStatic": {
+            "enabled": false
+        }
+    }
+}

DEVELOPER_GUIDE.md

@@ -6,6 +6,7 @@
     - [Pipenv](#pipenv)
     - [NVM and Node](#nvm-and-node)
     - [Yarn](#yarn)
+    - [Java](#java)
   - [Install Dependencies](#install-dependencies)
   - [Run Tests](#run-tests)
   - [Build OpenSearch](#build-opensearch)
@@ -76,6 +77,10 @@ nvm install v10.24.1
 npm install -g yarn
 ```
 
+#### Java
+
+This project recommends Java 11 for Jenkins jobs CI. This means you must have a JDK 11 installed with the environment variable `JAVA_HOME` referencing the path to Java home for your JDK installation, e.g. `JAVA_HOME=/usr/lib/jvm/jdk-11`. Download Java 11 from [here](https://adoptium.net/releases.html?variant=openjdk11).
+
 ### Install Dependencies
 
 Install dependencies. 
@@ -90,13 +95,21 @@ Alternatively, run a command inside the virtualenv with pipenv run.
 
 ### Run Tests
 
-This project uses [pytest](https://docs.pytest.org/en/6.x/) to ensure code quality. See [tests](tests).
+This project uses [pytest](https://docs.pytest.org/en/6.x/) to ensure Python code quality, and [JUnit](https://junit.org/) for Groovy code. See [tests](tests).
 
 ```
 $ pipenv run pytest
 2 passed in 02s
 ```
 
+```
+$ ./gradlew test
+
+> Task :test
+BUILD SUCCESSFUL in 7s
+3 actionable tasks: 1 executed, 2 up-to-date
+```
+
 ### Build OpenSearch
 
 Try running `./build.sh`. It should complete and show usage.
@@ -115,7 +128,7 @@ build.sh: error: the following arguments are required: manifest
 
 ### Code Linting
 
-This project uses a [pre-commit hook](https://pre-commit.com/) for linting python code.
+This project uses a [pre-commit hook](https://pre-commit.com/) for linting Python code.
 
 ```
 $ pipenv run pre-commit install

build.gradle

@@ -0,0 +1,69 @@
+/*
+ * 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.
+ */
+
+/*
+ * This build file was generated by the Gradle 'init' task.
+ *
+ * This generated file contains a commented-out sample Java project to get you started.
+ * For more details take a look at the Java Quickstart chapter in the Gradle
+ * user guide available at https://docs.gradle.org/3.5/userguide/tutorial_java_projects.html
+ */
+
+plugins {
+    id 'com.mkobit.jenkins.pipelines.shared-library' version '0.10.1'
+    id 'jacoco'
+    id 'java'
+    id 'groovy'
+}
+
+repositories {
+    maven { url 'http://bits.netbeans.org/maven2/' }
+    maven { url 'https://repo.jenkins-ci.org/releases/' }
+    jcenter()
+    maven { url 'https://mvnrepository.com/artifact/' }
+    mavenLocal()
+}
+
+dependencies {
+    compile group: 'org.assertj', name: 'assertj-core', version: '3.4.1'
+    compile group: 'com.lesfurets', name:'jenkins-pipeline-unit', version: '1.7'
+    compile group: 'com.cloudbees', name: 'groovy-cps', version: '1.12'
+}
+
+sourceSets {
+    main {
+        groovy {
+            srcDirs = ['src/jenkins']
+        }
+    }
+
+    test {
+        groovy {
+            srcDirs = ['tests/jenkins']
+        }
+    }
+
+    jobs {
+        groovy {
+            srcDirs 'src/jenkins/jobs'
+            compileClasspath += main.compileClasspath
+        }
+
+        compileClasspath += sourceSets.main.output
+        runtimeClasspath += sourceSets.main.output
+    }
+}
+
+sharedLibrary {
+    coreVersion = '2.176.2'
+    testHarnessVersion = '2.54'
+    pluginDependencies {
+        workflowCpsGlobalLibraryPluginVersion = '2.16'
+        dependency('org.jenkins-ci.plugins', 'pipeline-input-step', '2.8')
+    }
+}

gradle.properties

@@ -0,0 +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
+# compatible open source license.
+#
+# Modifications Copyright OpenSearch Contributors. See
+# GitHub history for details.
+#
+
+org.gradle.warning.mode=none
+org.gradle.parallel=true

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,18 @@
+
+#
+# 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.
+#
+
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.6.1-all.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionSha256Sum=11657af6356b7587bfb37287b5992e94a9686d5c8a0a1b60b87b9928a2decde5

gradlew

@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# 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
+#
+#      https://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.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"