1 files changed, 125 insertions, 0 deletions
diff --git a/src/main/java/io/trygvis/maven/classpath/ClasspathMojo.java b/src/main/java/io/trygvis/maven/classpath/ClasspathMojo.java
new file mode 100755
index 0000000..4cc8d39
--- /dev/null
+++ b/src/main/java/io/trygvis/maven/classpath/ClasspathMojo.java
@@ -0,0 +1,125 @@
+package io.trygvis.maven.classpath;
+
+import static java.util.Collections.singletonList;
+import static java.util.Collections.sort;
+import static org.apache.maven.plugins.annotations.LifecyclePhase.GENERATE_RESOURCES;
+import static org.apache.maven.plugins.annotations.ResolutionScope.RUNTIME;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import org.apache.maven.artifact.Artifact;
+import org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout;
+import org.apache.maven.artifact.repository.layout.DefaultRepositoryLayout;
+import org.apache.maven.model.Resource;
+import org.apache.maven.plugin.AbstractMojo;
+import org.apache.maven.plugin.MojoExecutionException;
+import org.apache.maven.plugin.MojoFailureException;
+import org.apache.maven.plugins.annotations.Component;
+import org.apache.maven.plugins.annotations.Mojo;
+import org.apache.maven.plugins.annotations.Parameter;
+import org.apache.maven.project.MavenProject;
+import org.codehaus.plexus.util.IOUtil;
+import org.sonatype.plexus.build.incremental.BuildContext;
+
+/**
+ * Writes the path of each compile/runtime dependency of a project to a file,
+ * where each path is relative to the root of a maven repository.
+ * <p>
+ * For example, if the project depends on commons-lang 2.6 and commons-math 2.2,
+ * then the file written will contain the line:
+ * <pre>
+ * commons-lang/commons-lang/2.6/commons-lang-2.6.jar
+ * org/apache/commons/commons-math/2.2/commons-math-2.2.jar
+ * </pre>
+ */
+@Mojo(name = "classpath",
+        defaultPhase = GENERATE_RESOURCES,
+        requiresDependencyCollection = RUNTIME)
+public class ClasspathMojo extends AbstractMojo {
+
+    @Component
+    private BuildContext context;
+
+    @Parameter(property = "project", required = true, readonly = true)
+    private MavenProject project;
+
+    @Parameter(defaultValue = "${project.build.directory}/generated-resources/classpath", property = "classpathOutputDirectory")
+    private File outputDirectory;
+
+    @Parameter(defaultValue = "classpath.txt")
+    private String file;
+
+    @Parameter(property = "sort", defaultValue = "false")
+    private boolean sort;
+
+    public void execute() throws MojoExecutionException, MojoFailureException {
+        List<String> paths = buildClasspath();
+        writeClasspath(paths);
+        addGeneratedResourceToBuild();
+    }
+
+    @SuppressWarnings("unchecked")
+    private List<String> buildClasspath() {
+        ArtifactRepositoryLayout layout = new DefaultRepositoryLayout();
+//        List<Artifact> artifacts = project.getRuntimeArtifacts();
+//        Collection<Artifact> artifacts = project.getDependencyArtifacts();
+        Collection<Artifact> artifacts = project.getArtifacts();
+        List<String> paths = new ArrayList<String>(artifacts.size());
+        for (Artifact artifact : artifacts) {
+//            System.out.println("artifact.getId() = " + artifact.getId());
+            String key = artifact.getGroupId() + ":" + artifact.getArtifactId() + ":" + artifact.getClassifier() + ":" + artifact.getVersion() + ":" + artifact.getType() + ":" + artifact.getClassifier();
+//            System.out.println("key: " + key);
+            paths.add(key);
+        }
+
+        if (sort) {
+            sort(paths);
+        }
+        return paths;
+    }
+
+    private void writeClasspath(List<String> paths)
+            throws MojoFailureException, MojoExecutionException {
+        File output = new File(outputDirectory, file);
+        File directory = output.getParentFile();
+        if (!directory.exists() && ! directory.mkdirs()) {
+            throw new MojoFailureException("Could not create directory: " + directory);
+        }
+
+        try {
+            writeClasspathFile(output, paths);
+        } catch (IOException ex) {
+            throw new MojoExecutionException("Could not write to " + file, ex);
+        }
+    }
+
+
+    private void writeClasspathFile(File output, List<String> classpath)
+            throws IOException {
+        OutputStream os = context.newFileOutputStream(output);
+        PrintWriter writer = null;
+        try {
+            writer = new PrintWriter(new OutputStreamWriter(os, "UTF-8"));
+            for (String s : classpath) {
+                writer.println(s);
+            }
+        } finally {
+            IOUtil.close(writer);
+            os.close();
+        }
+    }
+
+    private void addGeneratedResourceToBuild() {
+        Resource resource = new Resource();
+        resource.setDirectory(outputDirectory.getPath());
+        resource.setIncludes(singletonList(file));
+        project.addResource(resource);
+    }
+}