[cli] Allow setting System properties. Resolves #395

apps/jreleaser/src/main/java/org/jreleaser/cli/AbstractCommand.java

@@ -28,16 +28,13 @@ import java.io.IOException;
 import java.io.PrintWriter;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.util.ResourceBundle;
 import java.util.concurrent.Callable;
 
 /**
  * @author Andres Almiray
  * @since 0.1.0
  */
-@CommandLine.Command(mixinStandardHelpOptions = true,
-    resourceBundle = "org.jreleaser.cli.Messages")
-abstract class AbstractCommand implements Callable<Integer> {
+abstract class AbstractCommand extends BaseCommand implements Callable<Integer> {
     protected JReleaserLogger logger;
 
     @CommandLine.Option(names = {"-d", "--debug"})
@@ -58,11 +55,6 @@ abstract class AbstractCommand implements Callable<Integer> {
     @CommandLine.Option(names = {"-od", "--output-directory"})
     Path outputdir;
 
-    @CommandLine.Spec
-    CommandLine.Model.CommandSpec spec;
-
-    ResourceBundle bundle = ResourceBundle.getBundle("org.jreleaser.cli.Messages");
-
     protected abstract Main parent();
 
     public Integer call() {

apps/jreleaser/src/main/java/org/jreleaser/cli/BaseCommand.java

@@ -0,0 +1,44 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright 2020-2021 The JReleaser 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.
+ */
+package org.jreleaser.cli;
+
+import picocli.CommandLine;
+
+import java.util.Map;
+import java.util.ResourceBundle;
+
+/**
+ * @author Andres Almiray
+ * @since 0.8.0
+ */
+@CommandLine.Command(mixinStandardHelpOptions = true,
+    resourceBundle = "org.jreleaser.cli.Messages")
+abstract class BaseCommand {
+    @CommandLine.Spec
+    CommandLine.Model.CommandSpec spec;
+
+    ResourceBundle bundle = ResourceBundle.getBundle("org.jreleaser.cli.Messages");
+
+    @CommandLine.Option(names = "-D",
+        paramLabel = "<key=value>",
+        descriptionKey = "system-property",
+        mapFallbackValue = "")
+    void setProperty(Map<String, String> props) {
+        props.forEach((k, v) -> System.setProperty(k, v));
+    }
+}

apps/jreleaser/src/main/java/org/jreleaser/cli/Main.java

@@ -26,21 +26,16 @@ import java.io.PrintWriter;
  * @since 0.1.0
  */
 @CommandLine.Command(name = "jreleaser",
-    resourceBundle = "org.jreleaser.cli.Messages",
-    mixinStandardHelpOptions = true,
     versionProvider = Versions.class,
     subcommands = {Init.class, Config.class, Template.class,
         Assemble.class, Changelog.class,
         Checksum.class, Sign.class, Upload.class,
         Release.class, Prepare.class, Package.class,
         Publish.class, Announce.class, FullRelease.class})
-public class Main implements Runnable {
+public class Main extends BaseCommand implements Runnable {
     PrintWriter out;
     PrintWriter err;
 
-    @CommandLine.Spec
-    CommandLine.Model.CommandSpec spec;
-
     public void run() {
         Banner.display(out);
 

apps/jreleaser/src/main/resources/org/jreleaser/cli/Messages.properties

@@ -28,6 +28,7 @@ usage.synopsisHeading    = %nUsage:\u0020
 usage.optionListHeading  = %nOptions:%n
 usage.commandListHeading = %nCommands:%n
 usage.footerHeading      = %nDocumentation found at https://jreleaser.org%n
+helpCommand.command      = COMMAND
 help                     = Show this help message and exit.
 version                  = Print version information and exit.
 # options
@@ -52,6 +53,7 @@ ERROR_unexpected_error = Unexpected error
 # options
 config-file     = The config file.
 git-root-search = Searches for the Git root.
+system-property = Sets a System property
 set-property    = Sets the value of a property. Repeatable.
 # text
 TEXT_config_file = Configuring with {}