[MRELEASE-1077] Add support for prepare-specific profiles

This closes #101

maven-release-plugin/src/it/projects/prepare/MRELEASE-1077/invoker.properties

@@ -0,0 +1,18 @@
+# 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.
+
+invoker.goals = release:clean release:prepare

maven-release-plugin/src/it/projects/prepare/MRELEASE-1077/pom.xml

@@ -0,0 +1,78 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ 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.
+  -->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.apache.maven.plugin.release.its</groupId>
+  <artifactId>mrelease-1077</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <scm>
+    <developerConnection>scm:dummy|nul</developerConnection>
+  </scm>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-release-plugin</artifactId>
+        <version>@project.version@</version>
+        <configuration>
+          <connectionUrl>scm:dummy|nul</connectionUrl>
+          <username>perform_username</username>
+          <password>perform_password</password>
+          <preparationProfiles>PrepProfA,PrepProfB</preparationProfiles>
+        </configuration>
+        <dependencies>
+          <dependency>
+            <groupId>org.apache.maven.its.release</groupId>
+            <artifactId>maven-scm-provider-dummy</artifactId>
+            <version>1.0</version>
+          </dependency>
+        </dependencies>
+      </plugin>
+
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-help-plugin</artifactId>
+        <version>3.3.0</version>
+        <executions>
+          <execution>
+            <id>Show profiles</id>
+            <phase>validate</phase>
+            <goals>
+              <goal>active-profiles</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+
+  <profiles>
+    <profile>
+      <id>PrepProfA</id>
+    </profile>
+
+    <profile>
+      <id>PrepProfB</id>
+    </profile>
+  </profiles>
+
+</project>

maven-release-plugin/src/it/projects/prepare/MRELEASE-1077/verify.groovy

@@ -0,0 +1,24 @@
+/*
+ * 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.
+ */
+
+File buildLog = new File( basedir, 'build.log' )
+assert buildLog.exists()
+
+assert buildLog.text.contains( "[INFO]  - PrepProfA (source: org.apache.maven.plugin.release.its:mrelease-1077:1.0-SNAPSHOT)")
+assert buildLog.text.contains( "[INFO]  - PrepProfB (source: org.apache.maven.plugin.release.its:mrelease-1077:1.0-SNAPSHOT)")

maven-release-plugin/src/main/java/org/apache/maven/plugins/release/PrepareReleaseMojo.java

@@ -102,6 +102,12 @@ public class PrepareReleaseMojo extends AbstractScmReleaseMojo {
     @Parameter(defaultValue = "true", property = "addSchema")
     private boolean addSchema;
 
+    /**
+     * Comma separated profiles to enable on release prepare, in addition to active profiles for project execution.
+     */
+    @Parameter(property = "preparationProfiles")
+    private String preparationProfiles;
+
     /**
      * Goals to run as part of the preparation step, after transformation but before committing. Space delimited.
      */
@@ -323,6 +329,14 @@ public class PrepareReleaseMojo extends AbstractScmReleaseMojo {
     @Parameter(defaultValue = "false", property = "pinExternals")
     private boolean pinExternals;
 
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    protected String getAdditionalProfiles() {
+        return preparationProfiles;
+    }
+
     /**
      * Specifies the line separator to format pom.xml. The following properties are
      * available: