update readme

README.md

@@ -12,6 +12,8 @@ All these factors are especially relevant for our core user base which is fairly
 
 Since version 0.14, Tycho (which integrates Maven and Eclipse based technologies) provide a generic way to launch any Equinox application through the tycho-eclipserun-plugin. Tycho-eclipserun allow the definition of extra dependencies retrieved through p2. 
 
+We recommend the use of the Acceleo Launcher with Tycho 0.24+ as this version made the specification of application arguments more rebust to spurious line endings.
+
 From a runtime point of view, the application is launched in an equinox runtime and as such every "auto-wiring" of the EPackages and Resource factories would work out of the box in the exact same way they works in Eclipse.
 
 The **Acceleo Equinox Launcher** can be dynamically provisionned by **Tycho** using a simple `pom.xml` and configured to:
@@ -34,3 +36,124 @@ Each example is independant and is in the sub-directory:
 
 * [All-in-One](./building-and-using-generator/): building a metamodel, a generator, and launching the generation on top of a dynamic instance as part of the Maven build. A scenario which is quite complex but enable a given development team to easily share a reproducible model driven process with no additional infrastructure.
 
+# Configuration
+
+The launcher can be configured using several arguments specified through `<args/>` tags in the `<applicationsArgs>` section.
+
+```xml
+<applicationsArgs>
+    <args>-consoleLog</args>
+    <args>-application</args>
+    <args>org.eclipse.acceleo.equinox.AcceleoLauncher</args>
+    <args>-data</args>
+    <args>${project.build.directory}/wks</args>
+    <args>-models</args>
+    <args>https://git.eclipse.org/c/umlgen/org.eclipse.umlgen.git/plain/org.eclipse.umlgen.gen.embedded.c/tests/org.eclipse.umlgen.gen.embedded.c.tests/models/NonRegressionModel.uml</args>
+    <args>-output</args>
+    <args>./src-gen</args>
+    <args>-actions</args>
+    <args>generate:org.eclipse.umlgen.gen.embedded.c/org.eclipse.umlgen.gen.embedded.c.main.Uml2ec</args>
+</applicationsArgs>
+
+```
+
+In order to launch a generator you need to make sure all its dependencies can be installed. This can be done by specifying p2 repositories:
+
+```xml
+<repositories>
+    <repository>
+      <id>Neon update site </id>
+      <layout>p2</layout>
+      <url>http://download.eclipse.org/releases/neon/</url>
+    </repository>
+    <repository>
+      <id>Website Generator</id>
+      <layout>p2</layout>
+      <url>http://www.obeo.fr/download/release/designer/9.0/community/latest/repository
+      </url>
+    </repository>
+</repositories>
+```          
+and then expliciting the dependencies
+
+```xml
+<dependencies>
+    <!-- We need the actual launcher application -->
+    <dependency>
+      <artifactId>org.eclipse.acceleo.equinox.launcher
+      </artifactId>
+      <type>eclipse-feature</type>
+    </dependency>
+    <!-- The Eclipse feature packaging the code generator. -->
+    <dependency>
+      <artifactId>fr.obeo.dsl.designer.gen.html.feature
+      </artifactId>
+      <type>eclipse-feature</type>
+    </dependency>
+    <!-- The project containing the .aird model needs EcoreTools 
+      to be resolved correctly -->
+    <dependency>
+      <artifactId>org.eclipse.emf.ecoretools.design</artifactId>
+      <type>eclipse-feature</type>
+	</dependency>
+</dependencies>
+```
+
+A dependency which can't be resolved will lead to a failed build.
+
+
+Please note that you can also specify dependencies on plugins without needing a Feature using the type **eclipse-plugin**:
+
+```xml
+<dependency>
+  <artifactId>org.eclipse.mylyn.docs.intent.markup.gen</artifactId>
+  <type>eclipse-plugin</type>
+</dependency>
+
+```
+            
+
+## -models URI1 URI2 
+
+Specify the models to use as inputs of the generation. Relative paths might be used or absolute uris to target the host environment like `platform:/resource/someProject/model/someModel.ecore` for instance.
+
+Several models can be specified when their URI are separated by spaces.
+
+## -actions ACTION1 ACTION2
+
+Specify the actions to execute, for instance `generate:org.generator.plugin.id/org.generator.plugin.ClassName` to launch an Acceleo code generator.
+
+The action `launch:/NonRegressionModel/generateJavaFromUML.launch` can be used to start a .launch file.
+
+The action `generate:org.eclipse.emf.codegen.ecore/org.eclipse.emf.codegen.ecore.generator.Generator` can be used to start the EMF Core Java code generation.
+
+
+Several actions can be specified with their value separated by spaces.
+
+## -data PATH
+
+Specify the folder which will keep the workspace. The default value for this parameter is set by *Tycho* and is the current project folder, in our case it generally is a bad default value as that could easily lead to trying to import a project in a workspace which is in one of its sub-directories.
+
+You should always specify this argument, the value `${project.build.directory}/wks` should work in most cases.
+
+## -consoleLog
+
+Log messages in the console. You should specify that flag in order to be able to troubleshoot any issue arising during the build.
+
+## -output PATH
+
+Specifiy the root folder to generate to, default is the application working folder.
+
+This parameter might not be required depending on the generator.
+
+## -projects-paths PATH
+
+Specify paths to search for project and import those in the workspace.
+
+## -jobs-wait-timeout INTEGER
+
+Specify the duration before timeout when waiting for eclipse Jobs completion.
+
+## -parameters P1 P2
+
+Parameters to pass to the generators. They should be passed in the order they are expected from the generator.