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Posted to commits@mahout.apache.org by ra...@apache.org on 2017/11/17 23:04:35 UTC
mahout git commit: MAHOUT-1999 Multi-artifact build closes
apache/mahout#350
Repository: mahout
Updated Branches:
refs/heads/master fe4cb1a09 -> d9b32f308
MAHOUT-1999 Multi-artifact build closes apache/mahout#350
Project: http://git-wip-us.apache.org/repos/asf/mahout/repo
Commit: http://git-wip-us.apache.org/repos/asf/mahout/commit/d9b32f30
Tree: http://git-wip-us.apache.org/repos/asf/mahout/tree/d9b32f30
Diff: http://git-wip-us.apache.org/repos/asf/mahout/diff/d9b32f30
Branch: refs/heads/master
Commit: d9b32f308804859b382e855d5a323a62ba7153e1
Parents: fe4cb1a
Author: Trevor a.k.a @rawkintrevo <tr...@gmail.com>
Authored: Fri Nov 17 17:04:24 2017 -0600
Committer: Trevor a.k.a @rawkintrevo <tr...@gmail.com>
Committed: Fri Nov 17 17:04:24 2017 -0600
----------------------------------------------------------------------
.travis.yml | 19 +--
buildtools/build-all-release-jars.sh | 30 -----
buildtools/change-scala-version.sh | 75 +++++++++++
distribution/pom.xml | 173 +++++++++++++++++++++++++
flink/pom.xml | 2 +-
h2o/pom.xml | 2 +-
math-scala/pom.xml | 2 +-
pom.xml | 13 +-
spark/pom.xml | 2 +-
viennacl-omp/pom.xml | 2 +-
viennacl/pom.xml | 2 +-
website/front/community/buildingmahout.md | 69 +++++++++-
12 files changed, 342 insertions(+), 49 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/mahout/blob/d9b32f30/.travis.yml
----------------------------------------------------------------------
diff --git a/.travis.yml b/.travis.yml
index 09e49c5..8ad2458 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -44,39 +44,39 @@ matrix:
include:
# Build Spark 1.6.3 , Scala 2.10
- jdk: "openjdk7"
- env: PROFILES="${PROFILES} -Pscala-2.10 -Pspark-1.6" SPARK_BIN=$SPARK_1_6
+ env: PROFILES="${PROFILES} -Pscala-2.10 -Pspark-1.6" SPARK_BIN=$SPARK_1_6 SCALA_VERSION="2.10"
# Build Spark 2.0.2 , Scala 2.11 - replace -D... with profiles when available
- jdk: "openjdk7"
- env: PROFILES="${PROFILES} -Pspark-2.0 -Pscala-2.11" SPARK_BIN=$SPARK_2_0
+ env: PROFILES="${PROFILES} -Pspark-2.0 -Pscala-2.11" SPARK_BIN=$SPARK_2_0 SCALA_VERSION="2.11"
# Build Spark 2.1.0 , Scala 2.11 - replace -D... with profiles when available
- jdk: "openjdk7"
- env: PROFILES="${PROFILES} -Pspark-2.1 -Pscala-2.11" SPARK_BIN=$SPARK_2_1
+ env: PROFILES="${PROFILES} -Pspark-2.1 -Pscala-2.11" SPARK_BIN=$SPARK_2_1 SCALA_VERSION="2.11"
# Build Spark 1.6.3 , Scala 2.10, ViennaCL
- jdk: "openjdk7"
- env: PROFILES="${PROFILES} -Pscala-2.10 -Pviennacl" SPARK_BIN=$SPARK_1_6
+ env: PROFILES="${PROFILES} -Pscala-2.10 -Pviennacl" SPARK_BIN=$SPARK_1_6 SCALA_VERSION="2.10"
# Build Spark 2.0.2 , Scala 2.11, ViennaCL - replace -D... with profiles when available
- jdk: "openjdk7"
- env: PROFILES="${PROFILES} -Pspark-2.0 -Pscala-2.11 -Pviennacl" SPARK_BIN=$SPARK_2_0
+ env: PROFILES="${PROFILES} -Pspark-2.0 -Pscala-2.11 -Pviennacl" SPARK_BIN=$SPARK_2_0 SCALA_VERSION="2.11"
# Build Spark 2.1.0 , Scala 2.11, ViennaCL - replace -D... with profiles when available
- jdk: "openjdk7"
- env: PROFILES="${PROFILES} -Pspark-2.1 -Pscala-2.11 -Pviennacl" SPARK_BIN=$SPARK_2_1
+ env: PROFILES="${PROFILES} -Pspark-2.1 -Pscala-2.11 -Pviennacl" SPARK_BIN=$SPARK_2_1 SCALA_VERSION="2.11"
# Build Spark 1.6.3 , Scala 2.10, ViennaCL-OMP
- jdk: "openjdk7"
- env: PROFILES="${PROFILES} -Pscala-2.10 -Pviennacl-omp" TEST_MODULES="${TEST_MODULES},viennacl-omp" SPARK_BIN=$SPARK_1_6
+ env: PROFILES="${PROFILES} -Pscala-2.10 -Pviennacl-omp" TEST_MODULES="${TEST_MODULES},viennacl-omp" SPARK_BIN=$SPARK_1_6 SCALA_VERSION="2.10"
# Build Spark 2.0.2 , Scala 2.11, ViennaCL-OMP - replace -D... with profiles when available
- jdk: "openjdk7"
- env: PROFILES="${PROFILES} -Pspark-2.0 -Pscala-2.11 -Pviennacl-omp" TEST_MODULES="${TEST_MODULES},viennacl-omp" SPARK_BIN=$SPARK_2_0
+ env: PROFILES="${PROFILES} -Pspark-2.0 -Pscala-2.11 -Pviennacl-omp" TEST_MODULES="${TEST_MODULES},viennacl-omp" SPARK_BIN=$SPARK_2_0 SCALA_VERSION="2.11"
# Build Spark 2.1.0 , Scala 2.11, ViennaCL-OMP - replace -D... with profiles when available
- jdk: "openjdk7"
- env: PROFILES="${PROFILES} -Pspark-2.1 -Pscala-2.11 -Pviennacl-omp" TEST_MODULES="${TEST_MODULES},viennacl-omp" SPARK_BIN=$SPARK_2_1
+ env: PROFILES="${PROFILES} -Pspark-2.1 -Pscala-2.11 -Pviennacl-omp" TEST_MODULES="${TEST_MODULES},viennacl-omp" SPARK_BIN=$SPARK_2_1 SCALA_VERSION="2.11"
git:
depth: 10
@@ -107,6 +107,7 @@ before_install:
script:
+ - buildtools/change-scala-version.sh $SCALA_VERSION
# Build Mahout
- mvn clean package $PROFILES $STANDARD_BUILD_OPTS -DskipTests
# Start Spark
http://git-wip-us.apache.org/repos/asf/mahout/blob/d9b32f30/buildtools/build-all-release-jars.sh
----------------------------------------------------------------------
diff --git a/buildtools/build-all-release-jars.sh b/buildtools/build-all-release-jars.sh
deleted file mode 100755
index cdb87b6..0000000
--- a/buildtools/build-all-release-jars.sh
+++ /dev/null
@@ -1,30 +0,0 @@
-#!/usr/bin/env bash
-
-#
-# Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements. See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You 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.
-#
-
-#
-# This file compiles all varients of scala and spark required for
-# release assemblies
-#
-
-cd ../
-mvn clean
-mvn -Pscala-2.10,spark-1.6,viennacl,viennacl-omp -DskipTests
-mvn -Pscala-2.11,spark-2.0,viennacl,viennacl-omp -DskipTests
-cd spark
-mvn -Pscala-2.11,spark-2.1 -DskipTests
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/mahout/blob/d9b32f30/buildtools/change-scala-version.sh
----------------------------------------------------------------------
diff --git a/buildtools/change-scala-version.sh b/buildtools/change-scala-version.sh
new file mode 100755
index 0000000..b61af80
--- /dev/null
+++ b/buildtools/change-scala-version.sh
@@ -0,0 +1,75 @@
+#!/usr/bin/env bash
+
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+#
+
+# A BIG Shoutout to the Bros and Bro-ettes at Apache Spark for this
+
+set -e
+
+VALID_VERSIONS=( 2.10 2.11 )
+
+usage() {
+ echo "Usage: $(basename $0) [-h|--help] <version>
+where :
+ -h| --help Display this help text
+ valid version values : ${VALID_VERSIONS[*]}
+" 1>&2
+ exit 1
+}
+
+if [[ ($# -ne 1) || ( $1 == "--help") || $1 == "-h" ]]; then
+ usage
+fi
+
+TO_VERSION=$1
+
+check_scala_version() {
+ for i in ${VALID_VERSIONS[*]}; do [ $i = "$1" ] && return 0; done
+ echo "Invalid Scala version: $1. Valid versions: ${VALID_VERSIONS[*]}" 1>&2
+ exit 1
+}
+
+check_scala_version "$TO_VERSION"
+
+if [ $TO_VERSION = "2.11" ]; then
+ FROM_VERSION="2.10"
+else
+ FROM_VERSION="2.11"
+fi
+
+sed_i() {
+ sed -e "$1" "$2" > "$2.tmp" && mv "$2.tmp" "$2"
+}
+
+export -f sed_i
+
+BASEDIR=$(dirname $0)/..
+find "$BASEDIR" -name 'pom.xml' -not -path '*target*' -print \
+ -exec bash -c "sed_i 's/\(artifactId.*\)_'$FROM_VERSION'/\1_'$TO_VERSION'/g' {}" \;
+
+# Also update <scala.binary.version> in parent POM
+# Match any scala binary version to ensure idempotency
+sed_i '1,/<scala\.compat\.version>[0-9]*\.[0-9]*</s/<scala\.compat\.version>[0-9]*\.[0-9]*</<scala.compat.version>'$TO_VERSION'</' \
+ "$BASEDIR/pom.xml"
+
+#
+# Mahout doesn't need this until we get our website acting right.
+#
+## Update source of scaladocs
+#echo "$BASEDIR/docs/_plugins/copy_api_dirs.rb"
+#sed_i 's/scala\-'$FROM_VERSION'/scala\-'$TO_VERSION'/' "$BASEDIR/docs/_plugins/copy_api_dirs.rb"
http://git-wip-us.apache.org/repos/asf/mahout/blob/d9b32f30/distribution/pom.xml
----------------------------------------------------------------------
diff --git a/distribution/pom.xml b/distribution/pom.xml
index bbf6fa0..c7a3fc5 100644
--- a/distribution/pom.xml
+++ b/distribution/pom.xml
@@ -29,10 +29,125 @@
<packaging>pom</packaging>
<properties>
<mahout.skip.distribution>true</mahout.skip.distribution>
+ <scala.210.version>2.10.6</scala.210.version>
+ <scala.211.version>2.11.8</scala.211.version>
+ <lifecycle.target>package</lifecycle.target>
</properties>
<build>
<defaultGoal>install</defaultGoal>
<plugins>
+
+ <plugin>
+ <groupId>org.codehaus.mojo</groupId>
+ <artifactId>exec-maven-plugin</artifactId>
+ <version>1.1.1</version>
+ <executions>
+ <execution>
+ <id>change-to-scala-2.11</id>
+ <phase>compile</phase>
+ <goals>
+ <goal>exec</goal>
+ </goals>
+ <configuration>
+ <workingDirectory>../buildtools</workingDirectory>
+ <executable>./change-scala-version.sh</executable>
+ <arguments>
+ <argument>2.11</argument>
+ </arguments>
+ </configuration>
+ </execution>
+ <execution>
+ <id>mahout-math-scala-2.11</id>
+ <phase>compile</phase>
+ <goals>
+ <goal>exec</goal>
+ </goals>
+ <configuration>
+ <workingDirectory>../math-scala</workingDirectory>
+ <executable>mvn</executable>
+ <arguments>
+ <argument>${lifecycle.target}</argument>
+ <argument>-Dscala.version=${scala.211.version}</argument>
+ <argument>-Dscala.compat.version=2.11</argument>
+ <argument>-DskipTests</argument>
+ </arguments>
+ </configuration>
+ </execution>
+ <execution>
+ <id>viennacl-2.11</id>
+ <phase>compile</phase>
+ <goals>
+ <goal>exec</goal>
+ </goals>
+ <configuration>
+ <workingDirectory>../viennacl</workingDirectory>
+ <executable>mvn</executable>
+ <arguments>
+ <argument>${lifecycle.target}</argument>
+ <argument>-Dscala.version=${scala.211.version}</argument>
+ <argument>-Dscala.compat.version=2.11</argument>
+ <argument>-DskipTests</argument>
+ </arguments>
+ </configuration>
+ </execution>
+ <execution>
+ <id>viennacl-omp-2.11</id>
+ <phase>compile</phase>
+ <goals>
+ <goal>exec</goal>
+ </goals>
+ <configuration>
+ <workingDirectory>../viennacl-omp</workingDirectory>
+ <executable>mvn</executable>
+ <arguments>
+ <argument>${lifecycle.target}</argument>
+ <argument>-Dscala.version=${scala.211.version}</argument>
+ <argument>-Dscala.compat.version=2.11</argument>
+ <argument>-DskipTests</argument>
+ </arguments>
+ </configuration>
+ </execution>
+ <execution>
+ <id>spark-2.0</id>
+ <phase>compile</phase>
+ <goals>
+ <goal>exec</goal>
+ </goals>
+ <configuration>
+ <workingDirectory>../spark</workingDirectory>
+ <executable>mvn</executable>
+ <arguments>
+ <argument>${lifecycle.target}</argument>
+ <argument>-Dspark.version=2.0.2</argument>
+ <argument>-Dspark.compat.version=2.0</argument>
+ <argument>-Dscala.version=${scala.211.version}</argument>
+ <argument>-Dscala.compat.version=2.11</argument>
+ <argument>-DskipTests</argument>
+ </arguments>
+ </configuration>
+ </execution>
+ <execution>
+ <id>spark-2.1</id>
+ <phase>compile</phase>
+ <goals>
+ <goal>exec</goal>
+ </goals>
+ <configuration>
+ <workingDirectory>../spark</workingDirectory>
+ <executable>mvn</executable>
+ <arguments>
+ <argument>${lifecycle.target}</argument>
+ <argument>-Dspark.version=2.1.1</argument>
+ <argument>-Dspark.compat.version=2.1</argument>
+ <argument>-Dscala.version=${scala.211.version}</argument>
+ <argument>-Dscala.compat.version=2.11</argument>
+ <argument>-DskipTests</argument>
+ </arguments>
+ </configuration>
+ </execution>
+ </executions>
+ </plugin>
+
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
@@ -100,6 +215,7 @@
</execution>
</executions>
</plugin>
+
</plugins>
</build>
<profiles>
@@ -155,6 +271,34 @@
<version>${project.version}</version>
</dependency>
</dependencies>
+ <build>
+ <plugins>
+ <plugin>
+ <groupId>org.codehaus.mojo</groupId>
+ <artifactId>exec-maven-plugin</artifactId>
+ <version>1.1.1</version>
+ <executions>
+ <execution>
+ <id>viennacl-2.11</id>
+ <phase>compile</phase>
+ <goals>
+ <goal>exec</goal>
+ </goals>
+ <configuration>
+ <workingDirectory>../viennacl</workingDirectory>
+ <executable>mvn</executable>
+ <arguments>
+ <argument>${lifecycle.target}</argument>
+ <argument>-Dscala.version=${scala.211.version}</argument>
+ <argument>-Dscala.compat.version=2.11</argument>
+ <argument>-DskipTests</argument>
+ </arguments>
+ </configuration>
+ </execution>
+ </executions>
+ </plugin>
+ </plugins>
+ </build>
</profile>
<profile>
@@ -196,6 +340,35 @@
<version>${project.version}</version>
</dependency>
</dependencies>
+ <build>
+ <plugins>
+ <plugin>
+ <groupId>org.codehaus.mojo</groupId>
+ <artifactId>exec-maven-plugin</artifactId>
+ <version>1.1.1</version>
+ <executions>
+ <execution>
+ <id>viennacl-omp-2.11</id>
+ <phase>compile</phase>
+ <goals>
+ <goal>exec</goal>
+ </goals>
+ <configuration>
+ <workingDirectory>../viennacl-omp</workingDirectory>
+ <executable>mvn</executable>
+ <arguments>
+ <argument>${lifecycle.target}</argument>
+ <argument>-Dscala.version=${scala.211.version}</argument>
+ <argument>-Dscala.compat.version=2.11</argument>
+ <argument>-DskipTests</argument>
+ </arguments>
+ </configuration>
+ </execution>
+
+ </executions>
+ </plugin>
+ </plugins>
+ </build>
</profile>
</profiles>
http://git-wip-us.apache.org/repos/asf/mahout/blob/d9b32f30/flink/pom.xml
----------------------------------------------------------------------
diff --git a/flink/pom.xml b/flink/pom.xml
index 4d21166..bc2b2d9 100644
--- a/flink/pom.xml
+++ b/flink/pom.xml
@@ -27,7 +27,7 @@
<relativePath>../pom.xml</relativePath>
</parent>
- <artifactId>mahout-flink_${scala.compat.version}</artifactId>
+ <artifactId>mahout-flink_2.10</artifactId>
<name>Mahout Flink bindings</name>
<description>
Mahout Bindings for Apache Flink
http://git-wip-us.apache.org/repos/asf/mahout/blob/d9b32f30/h2o/pom.xml
----------------------------------------------------------------------
diff --git a/h2o/pom.xml b/h2o/pom.xml
index 22aa1a3..d911f5b 100644
--- a/h2o/pom.xml
+++ b/h2o/pom.xml
@@ -27,7 +27,7 @@
<relativePath>../pom.xml</relativePath>
</parent>
- <artifactId>mahout-h2o_${scala.compat.version}</artifactId>
+ <artifactId>mahout-h2o_2.10</artifactId>
<name>Mahout H2O backend</name>
<description>
H2O Backend for Mahout DSL
http://git-wip-us.apache.org/repos/asf/mahout/blob/d9b32f30/math-scala/pom.xml
----------------------------------------------------------------------
diff --git a/math-scala/pom.xml b/math-scala/pom.xml
index 6b5f85d..0d74e32 100644
--- a/math-scala/pom.xml
+++ b/math-scala/pom.xml
@@ -27,7 +27,7 @@
<relativePath>../pom.xml</relativePath>
</parent>
- <artifactId>mahout-math-scala_${scala.compat.version}</artifactId>
+ <artifactId>mahout-math-scala_2.10</artifactId>
<name>Mahout Math Scala bindings</name>
<description>High performance scientific and technical computing data structures and methods,
mostly based on CERN's
http://git-wip-us.apache.org/repos/asf/mahout/blob/d9b32f30/pom.xml
----------------------------------------------------------------------
diff --git a/pom.xml b/pom.xml
index 419d290..a8a29ff 100644
--- a/pom.xml
+++ b/pom.xml
@@ -586,7 +586,7 @@
<version>2.5.2</version>
<configuration>
<useReleaseProfile>true</useReleaseProfile>
- <releaseProfiles>mahout-release,apache-release,hadoop2</releaseProfiles>
+ <releaseProfiles>viennacl,viennacl-omp,distribution,mahout-release,apache-release</releaseProfiles>
<goals>deploy</goals>
<autoVersionSubmodules>true</autoVersionSubmodules>
<arguments>${arguments}</arguments>
@@ -842,13 +842,22 @@
<module>mr</module>
<module>integration</module>
<module>examples</module>
- <module>distribution</module>
+
<module>math-scala</module>
<module>spark</module>
<module>h2o</module>
</modules>
<profiles>
+ <profile>
+ <id>distribution</id>
+ <activation>
+ <activeByDefault>false</activeByDefault>
+ </activation>
+ <modules>
+ <module>distribution</module>
+ </modules>
+ </profile>
<profile>
<id>flink</id>
http://git-wip-us.apache.org/repos/asf/mahout/blob/d9b32f30/spark/pom.xml
----------------------------------------------------------------------
diff --git a/spark/pom.xml b/spark/pom.xml
index dc26f6a..eba7ee8 100644
--- a/spark/pom.xml
+++ b/spark/pom.xml
@@ -27,7 +27,7 @@
<relativePath>../pom.xml</relativePath>
</parent>
- <artifactId>mahout-spark_${scala.compat.version}</artifactId>
+ <artifactId>mahout-spark_2.10</artifactId>
<name>Mahout Spark bindings</name>
<description>
Mahout Bindings for Apache Spark
http://git-wip-us.apache.org/repos/asf/mahout/blob/d9b32f30/viennacl-omp/pom.xml
----------------------------------------------------------------------
diff --git a/viennacl-omp/pom.xml b/viennacl-omp/pom.xml
index 5fe5bd6..4f66cb9 100644
--- a/viennacl-omp/pom.xml
+++ b/viennacl-omp/pom.xml
@@ -27,7 +27,7 @@
<relativePath>../pom.xml</relativePath>
</parent>
- <artifactId>mahout-native-viennacl-omp_${scala.compat.version}</artifactId>
+ <artifactId>mahout-native-viennacl-omp_2.10</artifactId>
<name>Mahout Native ViennaCL OpenMP Bindings</name>
<description>Native Structures and interfaces to be used from Mahout math-scala.
http://git-wip-us.apache.org/repos/asf/mahout/blob/d9b32f30/viennacl/pom.xml
----------------------------------------------------------------------
diff --git a/viennacl/pom.xml b/viennacl/pom.xml
index 9c8d302..629c524 100644
--- a/viennacl/pom.xml
+++ b/viennacl/pom.xml
@@ -27,7 +27,7 @@
<relativePath>../pom.xml</relativePath>
</parent>
- <artifactId>mahout-native-viennacl_${scala.compat.version}</artifactId>
+ <artifactId>mahout-native-viennacl_2.10</artifactId>
<name>Mahout Native ViennaCL OpenCL Bindings</name>
<description>Native Structures and interfaces to be used from Mahout math-scala.
http://git-wip-us.apache.org/repos/asf/mahout/blob/d9b32f30/website/front/community/buildingmahout.md
----------------------------------------------------------------------
diff --git a/website/front/community/buildingmahout.md b/website/front/community/buildingmahout.md
index f6e33d2..40b509b 100644
--- a/website/front/community/buildingmahout.md
+++ b/website/front/community/buildingmahout.md
@@ -110,7 +110,7 @@ These should be added to the your ~/.bashrc file.
###### Building Mahout with Apache Maven
-Currently Mahout has 3 builds. From the $MAHOUT_HOME directory we may issue the commands to build each using mvn profiles.
+From the $MAHOUT_HOME directory we may issue the commands to build each using mvn profiles.
JVM only:
```
@@ -125,4 +125,69 @@ JVM with native OpenMP and OpenCL for Level 2 and level 3 matrix/vector Multipli
```
mvn clean install -Pviennacl -Phadoop2 -DskipTests
```
-
\ No newline at end of file
+
+### Changing Scala Version
+
+To change the Scala version used it is possible to use profiles, however the resulting artifacts seem to have trouble being resolved with SBT.
+
+```bash
+mvn clean install -Pscala-2.11
+```
+
+Maven is able to resolve the resulting artifacts effectively, this will also work if the goal is simply to use the Mahout-Shell. However if the goal is to build with SBT, the following tool should be used
+
+```bash
+cd $MAHOUT_HOME/buildtools
+./change-scala-version.sh 2.11
+```
+
+Now go back to `$MAHOUT_HOME` and execute
+
+```bash
+mvn clean install -Pscala-2.11
+```
+
+**NOTE:** you still need to pass the `-Pscala-2.11` profile, as this determines and propegates the minor scala version (e.g. 2.11.8)
+
+
+### The Distribution Profile
+
+The distribution profile, among other things, will produce the same artifact for multiple Scala and Spark versions.
+
+Specifically, in addition to creating all of the
+
+Default Targets:
+- Spark 1.6 Bindings, Scala-2.10
+- Mahout-Math Scala-2.10
+- ViennaCL Scala-2.10*
+- ViennaCL-OMP Scala-2.10*
+- H2O Scala-2.10
+
+It will also create:
+- Spark 2.0 Bindings, Scala-2.11
+- Spark 2.1 Bindings, Scala-2.11
+- Mahout-Math Scala-2.11
+- ViennaCL Scala-2.11*
+- ViennaCL-OMP Scala-2.11*
+- H2O Scala-2.11
+
+Note: * ViennaCLs are only created if the `viennacl` or `viennacl-omp` profiles are activated.
+
+By default, this phase will execute the `package` lifecycle goal on all built "extra" varients.
+
+E.g. if you were to run
+
+```bash
+mvn clean install -Pdistribution
+```
+
+You will `install` all of the "Default Targets" but only `package` the "Also created".
+
+If you wish to `install` all of the above, you can set the `lifecycle.target` switch as follows:
+
+```bash
+mvn clean install -Pdistribution -Dlifecycle.target=install
+```
+
+
+