Added makepom option to main/standalone

This close PR #71 at github.com/apache/ant-ivy

.gitignore

@@ -20,3 +20,4 @@ test/repositories/norevision/ivy-mod1.1.xml
 test/repositories/norevision/mod1.1.jar
 test/test-repo/bundlerepo/*.jar
 test/test-repo/ivyrepo/org.apache.ivy.osgi
+out/

asciidoc/release-notes.adoc

@@ -93,6 +93,7 @@ For details about the following changes, check our JIRA install at link:https://
 - NEW: Lets SSH-based resolvers use an `~/.ssh/config` file to find username/hostname/keyfile options (Thanks to Colin Stanfill)
 - NEW: Add ivy.maven.lookup.sources and ivy.maven.lookup.javadoc variables to control the lookup of the additional artifacts. Defaults to true, for backward compatibility (jira:IVY-1529[])
 - NEW: Add (conditional) support for SHA-256, SHA-512 and SHA-384 checksum algorithms (jira:IVY-1554[]) (Thanks to Jaikiran Pai)
+- NEW: The standalone Ivy jar can now be used to generate a pom file for the resolved module, using the `makepom` option (Thanks to link:https://github.com/aanno[aanno])
 
 
 ////

src/java/org/apache/ivy/Main.java

@@ -47,6 +47,8 @@ import org.apache.ivy.core.resolve.ResolveOptions;
 import org.apache.ivy.core.resolve.ResolveProcessException;
 import org.apache.ivy.core.retrieve.RetrieveOptions;
 import org.apache.ivy.core.settings.IvySettings;
+import org.apache.ivy.plugins.parser.m2.PomModuleDescriptorWriter;
+import org.apache.ivy.plugins.parser.m2.PomWriterOptions;
 import org.apache.ivy.plugins.parser.xml.XmlModuleDescriptorWriter;
 import org.apache.ivy.plugins.report.XmlReportParser;
 import org.apache.ivy.util.DefaultMessageLogger;
@@ -174,6 +176,10 @@ public final class Main {
                     new OptionBuilder("overwrite").description(
                         "overwrite files in the repository if they exist").create())
 
+                .addCategory("makepom options")
+                .addOption(new OptionBuilder("makepom").arg("pomfilepath")
+                        .description("Creates a pom file for the module").create())
+
                 .addCategory("http auth options")
                 .addOption(
                     new OptionBuilder("realm").arg("realm")
@@ -199,6 +205,7 @@ public final class Main {
                     new OptionBuilder("cp").arg("cp")
                             .description("extra classpath to use when launching process").create())
 
+
                 .addCategory("message options")
                 .addOption(
                     new OptionBuilder("debug").description("set message level to debug").create())
@@ -419,6 +426,12 @@ public final class Main {
                             .setOverwrite(line.hasOption("overwrite")));
             }
         }
+        if (line.hasOption("makepom")) {
+            final String pomFilePath = line.getOptionValue("makepom", "pom.xml");
+            final File pomFile = new File(pomFilePath);
+            PomModuleDescriptorWriter.write(md, pomFile, new PomWriterOptions());
+            Message.debug("Generated a pom file for module at " + pomFile);
+        }
         if (line.hasOption("main")) {
             // check if the option cp has been set
             List<File> fileList = getExtraClasspathFileList(line);

test/java/org/apache/ivy/MainTest.java

@@ -18,6 +18,8 @@
 package org.apache.ivy;
 
 import org.apache.ivy.core.retrieve.RetrieveOptions;
+import org.apache.ivy.core.settings.IvySettings;
+import org.apache.ivy.plugins.parser.m2.PomModuleDescriptorParser;
 import org.apache.ivy.util.CacheCleaner;
 import org.apache.ivy.util.cli.CommandLine;
 import org.apache.ivy.util.cli.ParseException;
@@ -26,6 +28,7 @@ import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
+import org.junit.rules.TemporaryFolder;
 
 import java.io.File;
 import java.nio.file.Files;
@@ -36,6 +39,7 @@ import java.util.HashSet;
 import java.util.Set;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 
@@ -46,6 +50,9 @@ public class MainTest {
     @Rule
     public ExpectedException expExc = ExpectedException.none();
 
+    @Rule
+    public TemporaryFolder tempDir = new TemporaryFolder();
+
     @Before
     public void setUp() {
         cache = new File("build/cache");
@@ -182,6 +189,25 @@ public class MainTest {
         assertTrue("Content at " + retrieveArtifactPath + " was not overwritten by retrieve task", Files.readAllBytes(retrieveArtifactPath).length > 0);
     }
 
+    /**
+     * Tests that the {@code makepom} option works as expected
+     *
+     * @throws Exception if something goes wrong
+     */
+    @Test
+    public void testMakePom() throws Exception {
+        final String pomFilePath = this.tempDir.getRoot().getAbsolutePath() + File.separator + "testmakepom.xml";
+        final String[] args = new String[]{"-settings", "test/repositories/ivysettings.xml", "-makepom", pomFilePath,
+                "-ivy", "test/repositories/1/org1/mod1.1/ivys/ivy-1.0.xml"};
+        final CommandLine parsedCommand = Main.getParser().parse(args);
+        final String parsedMakePomPath = parsedCommand.getOptionValue("makepom");
+        assertEquals("Unexpected makepom parsed", pomFilePath, parsedMakePomPath);
+        assertFalse("pom file " + pomFilePath + " already exists", new File(pomFilePath).exists());
+        // run the command
+        run(args);
+        assertTrue("pom file hasn't been generated at " + pomFilePath, new File(pomFilePath).isFile());
+    }
+
     private void run(String[] args) throws Exception {
         Main.run(Main.getParser(), args);
     }