1 files changed, 117 insertions, 0 deletions
diff --git a/src/com/gitblit/Launcher.java b/src/com/gitblit/Launcher.java
new file mode 100644
index 00000000..a55056d5
--- /dev/null
+++ b/src/com/gitblit/Launcher.java
@@ -0,0 +1,117 @@
+package com.gitblit;
+
+import java.io.File;
+import java.io.FileFilter;
+import java.io.IOException;
+import java.lang.reflect.Method;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.security.ProtectionDomain;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Launch helper class that adds all jars found in the local "lib" folder and
+ * then calls the application main. Using this technique we do not have to
+ * specify a classpath and we can dynamically add jars to the distribution.
+ * 
+ */
+public class Launcher {
+
+	public final static boolean debug = false;
+
+	public static void main(String[] args) {
+		if (debug)
+			System.out.println("jcp=" + System.getProperty("java.class.path"));
+
+		ProtectionDomain protectionDomain = Launcher.class.getProtectionDomain();
+		final String launchJar = protectionDomain.getCodeSource().getLocation().toExternalForm();
+		if (debug)
+			System.out.println("launcher=" + launchJar);
+
+		Build.runtime();
+
+		// Load the JARs in the lib and ext folder
+		String[] folders = new String[] { "lib", "ext" };
+		List<File> jars = new ArrayList<File>();
+		for (String folder : folders) {
+			if (folder == null)
+				continue;
+			File libFolder = new File(folder);
+			if (!libFolder.exists())
+				continue;
+			try {
+				libFolder = libFolder.getCanonicalFile();
+			} catch (IOException iox) {
+			}
+			jars.addAll(findJars(libFolder));
+		}
+
+		if (jars.size() == 0) {
+			for (String folder : folders) {
+				File libFolder = new File(folder);
+				System.err.println("Failed to find any JARs in " + libFolder.getPath());
+			}
+			System.exit(-1);
+		} else {
+			for (File jar : jars) {
+				try {
+					addJarFile(jar);
+				} catch (Throwable t) {
+					t.printStackTrace();
+				}
+			}
+		}
+
+		// Start Server
+		GitBlitServer.main(args);
+	}
+
+	public static List<File> findJars(File folder) {
+		List<File> jars = new ArrayList<File>();
+		if (folder.exists()) {
+			File[] libs = folder.listFiles(new FileFilter() {
+				@Override
+				public boolean accept(File file) {
+					return !file.isDirectory() && file.getName().toLowerCase().endsWith(".jar");
+				}
+			});
+			if (libs != null && libs.length > 0) {
+				jars.addAll(Arrays.asList(libs));
+				if (debug) {
+					for (File jar : jars)
+						System.out.println("found " + jar);
+				}
+			}
+		}
+		return jars;
+	}
+
+	/**
+	 * Parameters of the method to add an URL to the System classes.
+	 */
+	private static final Class<?>[] parameters = new Class[] { URL.class };
+
+	/**
+	 * Adds a file to the classpath
+	 * 
+	 * @param f
+	 *            the file to be added
+	 * @throws IOException
+	 */
+	public static void addJarFile(File f) throws IOException {
+		URL u = f.toURI().toURL();
+		if (debug)
+			System.out.println("load=" + u.toExternalForm());
+		URLClassLoader sysloader = (URLClassLoader) ClassLoader.getSystemClassLoader();
+		Class<?> sysclass = URLClassLoader.class;
+		try {
+			Method method = sysclass.getDeclaredMethod("addURL", parameters);
+			method.setAccessible(true);
+			method.invoke(sysloader, new Object[] { u });
+		} catch (Throwable t) {
+			throw new IOException("Error, could not add " + f.getPath() + " to system classloader", t);
+		}
+	}
+}