Add com.redhat.ceylon.war module to provide WAR initialization logic.

The module currently provides a single java class that initializes the
repo and metamodel from a WAR.

build.xml

@@ -64,10 +64,11 @@
         <module name="ceylon.time"/>
         <module name="ceylon.unicode"/>
         <module name="ceylon.locale"/>
+        <module name="com.redhat.ceylon.war"/>
         <module name="com.redhat.ceylon.test"/>
         <module name="com.redhat.ceylon.testjvm"/>
     </moduleset>
-    
+
     <moduleset id="modules.sdk.js">
         <module name="ceylon.collection"/>
         <module name="ceylon.html"/>
@@ -250,6 +251,7 @@
                 <include name="ceylon/locale/**"/>
                 <include name="ceylon/interop/java/**"/>
                 <include name="ceylon/html/**"/>
+                <include name="com/redhat/ceylon/war/**"/>
             </fileset>
         </copy>
     </target>

source/com/redhat/ceylon/war/WarInitializer.java

@@ -0,0 +1,97 @@
+package com.redhat.ceylon.war;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.nio.file.Files;
+import java.util.Properties;
+
+import javax.servlet.ServletContext;
+import javax.servlet.ServletContextEvent;
+import javax.servlet.ServletContextListener;
+
+import com.redhat.ceylon.common.FileUtil;
+import com.redhat.ceylon.compiler.java.runtime.tools.Backend;
+import com.redhat.ceylon.compiler.java.runtime.tools.CeylonToolProvider;
+import com.redhat.ceylon.compiler.java.runtime.tools.Runner;
+import com.redhat.ceylon.compiler.java.runtime.tools.RunnerOptions;
+
+public class WarInitializer implements ServletContextListener {
+
+	@Override
+	public void contextDestroyed(final ServletContextEvent sce) {
+		this.runner.cleanup();
+		if (this.tmpRepo != null) {
+			FileUtil.deleteQuietly(this.tmpRepo);
+		}
+	}
+
+	@Override
+	public void contextInitialized(final ServletContextEvent sce) {
+		final ServletContext context = sce.getServletContext(); 
+		final File repo = setupRepo(context);
+		final Properties properties = moduleProperties(context);
+		final RunnerOptions options = new RunnerOptions();
+
+		options.setOffline(true);
+		options.setSystemRepository("flat:" + repo.getAbsolutePath());
+
+		this.runner = CeylonToolProvider.getRunner(Backend.Java, options, 
+				properties.getProperty("moduleName"),
+				properties.getProperty("moduleVersion"));
+
+		this.runner.run();
+	}
+
+	protected File setupRepo(final ServletContext context) {
+		try {
+			final URL libDir = context.getResource("/WEB-INF/lib");
+			if (libDir.getProtocol().equals("file")) {
+
+				return new File(libDir.toURI());
+			} else {
+				// we're running from the WAR, and need to extract a repo to disk
+				final URL libList = context.getResource("/META-INF/libs.txt");
+				this.tmpRepo = Files.createTempDirectory("ceylon_war_repo").toFile();
+
+				try (BufferedReader reader = new BufferedReader(new InputStreamReader(libList.openStream()))) {
+					String filename;
+					while ((filename = reader.readLine()) != null) {
+						copy(context.getResource("/WEB-INF/lib/" + filename), new File(this.tmpRepo, filename));
+					}
+				}
+
+				return this.tmpRepo;
+			}				
+
+		} catch (IOException|URISyntaxException e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+	protected Properties moduleProperties(final ServletContext context) {
+		final Properties properties = new Properties();
+		try (InputStream moduleProps = context.getResourceAsStream("/META-INF/module.properties")) {
+			properties.load(moduleProps);
+		} catch (IOException e) {
+			throw new RuntimeException(e);
+		}
+
+		return properties;
+	}
+
+	protected void copy(final URL src, final File dest) throws IOException {
+		try (InputStream stream = src.openStream()) {
+			Files.copy(stream, dest.toPath());
+		}
+	}
+
+	private File tmpRepo;
+	private Runner runner;
+}
+
+

source/com/redhat/ceylon/war/module.ceylon

@@ -0,0 +1,10 @@
+"Provides a ServletContextListener for initializing the
+ Ceylon runtime when a Ceylon WAR is loaded by a Servlet
+ container. This module will automatically be added to a
+ WAR when it is created - you should never need to import
+ this module directly."
+module com.redhat.ceylon.war "1.1.1" {
+    import java.base "7";
+    import com.redhat.ceylon.common "1.1.1";
+    import javax.servlet "3.1.0";
+}

source/com/redhat/ceylon/war/package.ceylon

@@ -0,0 +1 @@
+shared package com.redhat.ceylon.war;

source/com/redhat/ceylon/war/run.ceylon

@@ -0,0 +1,4 @@
+"Run the module `com.redhat.ceylon.war`."
+shared void run() {
+
+}