ZmtEclipsePlugin.groovy: fixed adding project dependency to launcher project

    launch configuration for launcher library is created if project
        is not available
    cleanup

src/main/groovy/de/zmt/gradle/ZmtEclipsePlugin.groovy

@@ -2,6 +2,9 @@ package de.zmt.gradle;
 
 import org.gradle.api.*
 import org.gradle.api.artifacts.ProjectDependency
+import java.nio.file.Path
+import java.nio.file.Paths
+import java.nio.file.Files
 
 /*
  * Eclipse Plugin for simulations based on zmt.core
@@ -10,62 +13,23 @@ import org.gradle.api.artifacts.ProjectDependency
  * simulation in eclipse via launcher.
  */
 class ZmtEclipsePlugin implements Plugin<Project> {
-    private static final def LAUNCHER_PROJECT_NAME = 'zmt-launcher'
-
     private static final def CONFIGURE = {
+        def launcherProject = rootProject.ext.properties.get('launcherProject')
+        def launchConfig = createLaunchConfigPath(project)
+        
         // need to have dependencies and stuff evaluated
         afterEvaluate {
-            // also generate eclipse files in dependencies
-            configurations.compile.dependencies.withType(ProjectDependency.class).each {
-                // need to evaluate dependencies first
-                evaluationDependsOn(it.dependencyProject.path)
-                if (it.dependencyProject.plugins.hasPlugin('eclipse')) {
-                    tasks.eclipse.dependsOn(it.dependencyProject.tasks.eclipse)
-                    tasks.cleanEclipse.dependsOn(
-                            it.dependencyProject.tasks.cleanEclipse)
-                }
-            }
-            // ... and for launcher
-            tasks.eclipse.dependsOn(':LAUNCHER_PROJECT_NAME:eclipse')
-            tasks.cleanEclipse.dependsOn(':LAUNCHER_PROJECT_NAME:cleanEclipse')
-
-            /* add runtime dependency for this project in launcher 
-            to make it executable in eclipse */
-            Project launcherProject = findProject(':LAUNCHER_PROJECT_NAME')
-            launcherProject?.afterEvaluate {
-                launcherProject.dependencies {
-                    runtime(project) {
-                        transitive = false
-                    }
-                }
-            }
+            addDependencies(project, launcherProject)
         }
 
-        def upperCaseName = name.substring(0, 1).toUpperCase()
-        upperCaseName += name.substring(1)
-        def launchConfigFileName = "Run${upperCaseName}WithUI.launch"
-
+        // create launch configuration
         tasks.eclipse.doLast {
-            def launchConfig = new File(launchConfigFileName)
-            // eclipse generated launch configuration with project name in it
-            launchConfig.text = """<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>
-        <launchConfiguration type=\"org.eclipse.jdt.launching.localJavaApplication\">
-        <listAttribute key=\"org.eclipse.debug.core.MAPPED_RESOURCE_PATHS\">
-        <listEntry value=\"/$LAUNCHER_PROJECT_NAME/src/main/java/de/zmt/Main.java\"/>
-        </listAttribute>
-        <listAttribute key=\"org.eclipse.debug.core.MAPPED_RESOURCE_TYPES\">
-        <listEntry value=\"1\"/>
-        </listAttribute>
-        <stringAttribute key=\"org.eclipse.jdt.launching.MAIN_TYPE\" value=\"de.zmt.Main\"/>
-        <stringAttribute key=\"org.eclipse.jdt.launching.PROGRAM_ARGUMENTS\" value=\"$project.name gui\"/>
-        <stringAttribute key=\"org.eclipse.jdt.launching.PROJECT_ATTR\" value=\"$LAUNCHER_PROJECT_NAME\"/>
-        <stringAttribute key=\"org.eclipse.jdt.launching.WORKING_DIRECTORY\" value=\"\${workspace_loc:$project.name}\"/>
-        </launchConfiguration>"""
+            launchConfig.text = createLaunchConfigText(project, launcherProject)
         }
 
         // delete launch configuration
         tasks.cleanEclipse.doLast {
-            new File(launchConfigFileName).delete()
+            Files.delete(launchConfig)
         }
     }
 
@@ -73,6 +37,81 @@ class ZmtEclipsePlugin implements Plugin<Project> {
     void apply(Project project) {
         project.configure(project, CONFIGURE)
     }
+    
+    /**
+     * Adds dependencies according to the availability of the
+     * launcher project.
+     * 
+     * @param project the project
+     * @param launcherProject the launcher project
+     */
+    private static void addDependencies(Project project, Project launcherProject) {
+        /* add runtime dependency for this project in launcher 
+         * (if available) to make it executable in eclipse */
+        launcherProject?.afterEvaluate {
+            launcherProject.dependencies {
+                runtime(project) {
+                    transitive = false
+                }
+            }
+        }
+        
+        /* If launcher project is not available a runtime dependency
+         * for launcher is added to this project. */
+        if (launcherProject == null) {
+            project.dependencies {
+                runtime 'de.zmt:zmt-launcher:latest.release'
+            }
+        }
+    }
+    
+    private static Path createLaunchConfigPath(Project project) {
+        def upperCaseName = project.name.substring(0, 1).toUpperCase()
+        upperCaseName += project.name.substring(1)
+        return project.projectDir.toPath().resolve("Run${upperCaseName}WithUI.launch")
+    }
+    
+    /**
+     * Creates text of an eclipse configuration to launch current
+     * project with zmt-launcher. If the launcher project is
+     * <code>null</code> the configuration will point to the libary.
+     * 
+     * @param project the project
+     * @param launcherProject the launcher project
+     * @return launch configuration text
+     */
+    private static String createLaunchConfigText(Project project, Project launcherProject) {
+        // if project is available, return launch config pointing to it
+        if (launcherProject != null) {
+            return """<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>
+<launchConfiguration type=\"org.eclipse.jdt.launching.localJavaApplication\">
+<listAttribute key=\"org.eclipse.debug.core.MAPPED_RESOURCE_PATHS\">
+<listEntry value=\"${launcherProject.projectDir}/src/main/java/de/zmt/Main.java\"/>
+</listAttribute>
+<listAttribute key=\"org.eclipse.debug.core.MAPPED_RESOURCE_TYPES\">
+<listEntry value=\"1\"/>
+</listAttribute>
+<stringAttribute key=\"org.eclipse.jdt.launching.MAIN_TYPE\" value=\"de.zmt.Main\"/>
+<stringAttribute key=\"org.eclipse.jdt.launching.PROGRAM_ARGUMENTS\" value=\"$project.name gui\"/>
+<stringAttribute key=\"org.eclipse.jdt.launching.PROJECT_ATTR\" value=\"$launcherProject.name\"/>
+<stringAttribute key=\"org.eclipse.jdt.launching.WORKING_DIRECTORY\" value=\"\${workspace_loc:$project.name}\"/>
+</launchConfiguration>"""
+        }
+        // ... otherwise return config pointing to launcher library
+        return """<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<launchConfiguration type="org.eclipse.jdt.launching.localJavaApplication">
+<listAttribute key="org.eclipse.debug.core.MAPPED_RESOURCE_PATHS">
+<listEntry value="${project.projectDir}"/>
+</listAttribute>
+<listAttribute key="org.eclipse.debug.core.MAPPED_RESOURCE_TYPES">
+<listEntry value="4"/>
+</listAttribute>
+<booleanAttribute key="org.eclipse.jdt.launching.ATTR_USE_START_ON_FIRST_THREAD" value="true"/>
+<stringAttribute key="org.eclipse.jdt.launching.MAIN_TYPE" value="de.zmt.Main"/>
+<stringAttribute key="org.eclipse.jdt.launching.PROGRAM_ARGUMENTS" value="$project.name gui"/>
+<stringAttribute key="org.eclipse.jdt.launching.PROJECT_ATTR" value="$project.name"/>
+</launchConfiguration>"""
+    }
 }