- enable running project 'quck' - run the jar in the dist directory directly

- enable running any class directly without needing a jar in the first place

.gitignore

@@ -1,3 +1,5 @@
-target/
-dist/
+/target/
+/dist/
 *.class
+/.idea/
+/*.iml

deployProject.sh

@@ -6,4 +6,9 @@ if [[ ! -e dist ]]; then
    mkdir dist;
 fi
 rm -r dist/* 2>/dev/null;
-jar cf ../dist/zeitlaeufer.jar target/**/*;
+dir=$(pwd)
+cd target;
+# jar [...] --manifest=[...] with main class does work when running with "java -jar" but not with "java --module-path"
+# --create --file <=> cf
+jar --create --file=../dist/zeitlaeufer.jar --main-class=de.szimnau.zeitlaeufer.Main ./**/*;
+cd $dir

runProject.sh

@@ -2,13 +2,25 @@
 set -uo pipefail
 
 # when executed as executable file in "git for windows" bash some things won't work, so always run with prefixed command
-originDir=$(pwd);
-cd ~/zeitlaeufer/;
-tmpDir="/tmp/zeitlaeufer_$RANDOM";
-mkdir $tmpDir;
-cp dist/zeitlaeufer.jar $tmpDir;
-cd $originDir;
-# java -cp $tmpDir/zeitlaeufer.jar $@;
+jarDir=/g/zeitlaeufer/dist/;
+if [[ $# == 0 || ($1 != -quick && $1 != -class) ]]; then
+   tmpDir=/tmp/zeitlaeufer_$RANDOM;
+   mkdir $tmpDir;
+   cp ${jarDir}zeitlaeufer.jar $tmpDir;
+   jarDir=$tmpDir;
+elif [[ $1 == -quick ]]; then
+   shift;
+elif [[ $1 == -class ]]; then
+   originDir=$(pwd);
+   cd /g/zeitlaeufer/target/;
+   java de.szimnau.zeitlaeufer.$2;
+   exitCode=$?;
+   cd originDir;
+   return $exitCode;
+fi
+# java -jar $tmpDir/zeitlaeufer.jar $@;
 # -p <=> --module-path | -m <=> --module
-java --module-path $tmpDir/zeitlaeufer.jar --module zeitlaeufer/$@;
-rm -r $tmpDir;
+java --module-path $jarDir/zeitlaeufer.jar --module zeitlaeufer $@;
+if [[ -n $tmpDir && -d $tmpDir ]]; then
+   rm -r $tmpDir;
+fi

src/main/java/de/szimnau/zeitlaeufer/Main.java

@@ -0,0 +1,133 @@
+package de.szimnau.zeitlaeufer;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.net.URL;
+import java.net.URLDecoder;
+import java.nio.charset.StandardCharsets;
+import java.util.*;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Function;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+import java.util.stream.Collectors;
+
+import static de.szimnau.zeitlaeufer.tools.CommonTools.print;
+import static de.szimnau.zeitlaeufer.tools.CommonTools.println;
+
+public class Main {
+
+   public static void main(String[] args) throws IOException, InvocationTargetException, NoSuchMethodException, IllegalAccessException {
+      if (args.length == 0) {
+         askParametersAndRun();
+      } else {
+         parseParametersAndRun(args);
+      }
+   }
+
+
+   private static void askParametersAndRun() throws IOException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {
+      var br = new BufferedReader(new InputStreamReader(System.in, StandardCharsets.UTF_8));
+      SortedMap<Integer, Class<?>> classes = getAllrelevantClasses();
+      String printedClasses = classes.entrySet().stream()
+          .map(e -> e.getKey() + ": " + e.getValue().getCanonicalName().substring(e.getValue().getCanonicalName().lastIndexOf('.') + 1))
+          .reduce("", (a, b) -> a + "\n" + b);
+      print("Welcher Zeitläufer soll verwendet werden? " + printedClasses + "\n: ");
+      var num = Integer.parseInt(br.readLine());
+      Class<?> selectedClass = classes.get(num);
+      Method mainMethod = selectedClass.getMethod("main", String[].class);
+      mainMethod.invoke(null, (Object) new String[0]);
+   }
+
+
+   private static SortedMap<Integer, Class<?>> getAllrelevantClasses() {
+      ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+      URL resourceUrl = classLoader.getResource("de/szimnau/zeitlaeufer");
+      if (resourceUrl == null) {
+         throw new RuntimeException("Kann ausführbare Klassen nicht eruieren, da keine Ressource \"de/szimnau/zeitlaeufer\" verfügbar.");
+      }
+      Set<String> fileNames;
+      if (resourceUrl.getPath().contains(".jar")) {
+         fileNames = getFileNamesStreamFromJar(resourceUrl);
+      } else {
+         fileNames = getFileNamesStreamFromPackage(resourceUrl);
+      }
+      var increment = new AtomicInteger();
+      return Collections.unmodifiableSortedMap(new TreeMap<>(
+          fileNames.stream()
+              .filter(line -> line.endsWith(".class") && !line.endsWith("module-info.class") && !line.endsWith("Main.class"))
+              .sorted()
+              .map(Main::getClass)
+              .filter(Objects::nonNull)
+              .filter(clazz ->
+                  Arrays.stream(clazz.getMethods()).anyMatch(m ->
+                      "main".equals(m.getName()) && m.getParameterCount() == 1 && m.getParameterTypes()[0] == String[].class
+                  )
+              )
+              .collect(Collectors.toMap(c -> increment.incrementAndGet(), Function.identity()))
+      ));
+   }
+
+
+   private static Set<String> getFileNamesStreamFromJar(URL resourceUrl) {
+      Set<String> fileNames = new HashSet<>();
+      String path = resourceUrl.getPath().split(":", 2)[1];
+      String cleanPath = path.substring(0, path.lastIndexOf('!'));
+      Enumeration<JarEntry> entries;
+      try (var jarFile = new JarFile(URLDecoder.decode(cleanPath, StandardCharsets.UTF_8))) {
+         entries = jarFile.entries();
+         while (entries.hasMoreElements()) {
+            JarEntry entry = entries.nextElement();
+            if (entry.isDirectory()) {
+               continue;
+            }
+            fileNames.add(entry.getName());
+         }
+      } catch (IOException e) {
+         throw new RuntimeException("Kann JAR-Datei zwecks Reflection nicht öffnen:", e);
+      }
+      return fileNames;
+   }
+
+
+   private static Set<String> getFileNamesStreamFromPackage(URL resourceUrl) {
+      try (InputStream stream = resourceUrl.openStream();
+           var br = new BufferedReader(new InputStreamReader(stream, StandardCharsets.UTF_8))) {
+         return br.lines()
+             .map(line -> "de/szimnau/zeitlaeufer." + line)
+             .collect(Collectors.toSet());
+      } catch (IOException e) {
+         throw new RuntimeException("ausführbare Klassen nicht eruieren, da Ressource " + resourceUrl + " nicht auslesbar.", e);
+      }
+   }
+
+
+   private static Class<?> getClass(String className) {
+      String classWithPath = className.replace("/", ".");
+      return getClassForName(classWithPath.substring(0, className.lastIndexOf('.')));
+   }
+
+
+   private static Class<?> getClassForName(String className) {
+      try {
+         return Class.forName(className);
+      } catch (ClassNotFoundException cnfe) {
+         println("ERROR: could not find Class for Name: de.szimnau.zeitlaeufer." + className);
+      }
+      return null;
+   }
+
+
+   private static void parseParametersAndRun(String[] args) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
+      Class<?> selectedClass = getClassForName("de.szimnau.zeitlaeufer." + args[0]);
+      if (selectedClass == null) {
+         System.exit(1);
+      }
+      var mainMethod = selectedClass.getMethod("main", String[].class);
+      mainMethod.invoke(null, (Object) Arrays.copyOfRange(args, 1, args.length));
+   }
+}