initial commit

.gitattributes

@@ -0,0 +1,12 @@
+#
+# https://help.github.com/articles/dealing-with-line-endings/
+#
+# Linux start script should use lf
+/gradlew        text eol=lf
+
+# These are Windows script files and should use crlf
+*.bat           text eol=crlf
+
+# Binary files should be left untouched
+*.jar           binary
+

.gitignore

@@ -0,0 +1,5 @@
+# Ignore Gradle project-specific cache directory
+.gradle
+
+# Ignore Gradle build output directory
+build

.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/google-java-format.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GoogleJavaFormatSettings">
+    <option name="enabled" value="true" />
+    <option name="style" value="AOSP" />
+  </component>
+</project>

.idea/gradle.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+          </set>
+        </option>
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

.idea/inspectionProfiles/Project_Default.xml

@@ -0,0 +1,5 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+  </profile>
+</component>

.idea/kotlinc.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Kotlin2JsCompilerArguments">
+    <option name="moduleKind" value="plain" />
+  </component>
+  <component name="Kotlin2JvmCompilerArguments">
+    <option name="jvmTarget" value="21" />
+  </component>
+  <component name="KotlinCommonCompilerArguments">
+    <option name="apiVersion" value="2.1" />
+    <option name="languageVersion" value="2.1" />
+  </component>
+  <component name="KotlinJpsPluginSettings">
+    <option name="version" value="2.1.10" />
+  </component>
+</project>

.idea/misc.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="FrameworkDetectionExcludesConfiguration">
+    <file type="web" url="file://$PROJECT_DIR$" />
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" project-jdk-name="21" project-jdk-type="JavaSDK" />
+  <component name="ScriptDefinitionSettings">
+    <option name="settings">
+      <list>
+        <ScriptDefinitionSetting>
+          <option name="definitionId" value="org.jetbrains.kotlin.mainKts.MainKtsScript" />
+        </ScriptDefinitionSetting>
+        <ScriptDefinitionSetting>
+          <option name="definitionId" value="kotlin.Any" />
+        </ScriptDefinitionSetting>
+        <ScriptDefinitionSetting>
+          <option name="definitionId" value="kotlin.Any" />
+        </ScriptDefinitionSetting>
+      </list>
+    </option>
+  </component>
+  <component name="TaskProjectConfiguration">
+    <server type="Redmine" url="https://redmine.keinekekse.net" />
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

build.gradle.kts

@@ -0,0 +1,60 @@
+plugins {
+    kotlin("jvm") version masterLibs.versions.kotlinVersion
+    `java-library`
+    `maven-publish`
+    alias(masterLibs.plugins.dokkaPlugin)
+    alias(masterLibs.plugins.versionPlugin)
+}
+
+group = "net.keinekekse"
+version = masterLibs.versions.utilLibraryVersion.get()
+description = "Kotlin Utility Library"
+extra["displayname"] = "Utility Library"
+extra["copyright"] = "Copyright (c) 2025 Hartmut Bauer"
+
+repositories {
+    maven("https://nexus.keinekekse.net/repository/maven-public/")
+}
+
+dependencies {}
+
+java {
+    toolchain {
+        languageVersion.set(JavaLanguageVersion.of(masterLibs.versions.javaVersion.get()))
+    }
+    withSourcesJar()
+}
+
+/* Generierte Dokka-Doku als javadoc.jar ausgeben (s.a. "publishing")
+tasks.register<Jar>("dokkaJar") {
+    group = "build"
+    description = "Assembles a JAR containing the Dokka documentation."
+    dependsOn(tasks.dokkaGeneratePublicationHtml) // Ensure Dokka is generated before creating the JAR
+//    dependsOn(tasks.dokkaGeneratePublicationJavadoc) // Ensure Dokka is generated before creating the JAR
+    archiveClassifier.set("javadoc")
+    from(layout.buildDirectory.dir("dokka")) // Use the output directory of Dokka
+}
+*/
+
+publishing {
+    repositories {
+        maven {
+            credentials {
+                username = "admin"
+                password = "admin123"
+            }
+            url = uri("https://nexus.keinekekse.net/repository/maven-releases/")
+        }
+    }
+    publications.create<MavenPublication>("maven") {
+        from(components["java"])
+//        artifact(tasks["dokkaJar"])
+    }
+}
+
+// ./gradlew dokkaGenerate
+dokka {
+    dokkaPublications.html {
+        outputDirectory.set(project.file("docs/api"))
+    }
+}

buildnumber.properties

@@ -0,0 +1,3 @@
+#auto generated
+#Sun Mar 09 18:10:28 CET 2025
+build.number=66

gradle.properties

@@ -0,0 +1,3 @@
+kotlin.code.style=official
+org.gradle.configuration-cache=true
+org.jetbrains.dokka.experimental.gradle.pluginMode=V2Enabled

gradle/libs.versions.toml

@@ -0,0 +1,8 @@
+[versions]
+junit-jupiter-engine = "5.11.1"
+
+[libraries]
+junit-jupiter-engine = { module = "org.junit.jupiter:junit-jupiter-engine", version.ref = "junit-jupiter-engine" }
+
+[plugins]
+kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version = "2.0.21" }

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,251 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,94 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle.kts

@@ -0,0 +1,24 @@
+pluginManagement {
+    repositories {
+        maven("https://nexus.keinekekse.net/repository/maven-public/")
+        gradlePluginPortal()
+    }
+}
+
+plugins {
+    // Apply the foojay-resolver plugin to allow automatic download of JDKs
+    id("org.gradle.toolchains.foojay-resolver-convention") version "0.9.0"
+}
+
+rootProject.name = "util"
+
+dependencyResolutionManagement {
+    repositories {
+        maven("https://nexus.keinekekse.net/repository/maven-public/")
+    }
+    versionCatalogs {
+        create("masterLibs") {
+            from("net.keinekekse:version-catalog:55")
+        }
+    }
+}

src/main/kotlin/net/keinekekse/config/config.kt

@@ -0,0 +1,40 @@
+package net.keinekekse.config
+
+import java.io.InputStream
+import java.util.*
+
+private const val CONFIG_FILE_NAME = "config.properties"
+private const val ERROR_LOADING_CONFIG = "Could not load configuration from $CONFIG_FILE_NAME"
+
+// TODO mit WAR testen wg. Pfad zu config.properties
+/**
+ * Projekt-Properties
+ *
+ * Die Datei ```config.properties``` wird aus dem JAR-root geladen.
+ * (-> in ```main/resources``` anlegen)
+ *
+ * ```
+ * val prop: String = ConfigProperties.get("some.prop")
+ * ```
+ */
+object ConfigProperties {
+    private val properties = Properties()
+
+    init {
+        loadConfigFile()
+    }
+
+    private fun loadConfigFile() {
+        val configFileStream: InputStream? =
+            javaClass.classLoader.getResourceAsStream(CONFIG_FILE_NAME)
+        if (configFileStream == null) {
+            throw IllegalStateException(ERROR_LOADING_CONFIG)
+        }
+
+        configFileStream.use {
+            properties.load(it)
+        }
+    }
+
+    fun get(key: String): String = properties.getProperty(key)
+}

src/main/kotlin/net/keinekekse/exec/exec.kt

@@ -0,0 +1,94 @@
+package net.keinekekse.exec
+
+import java.io.File
+import java.io.IOException
+import java.util.concurrent.TimeUnit
+
+class CommandExecutionException(message: String) : Exception(message)
+
+private const val IO_EXCEPTION_CODE = 0x10000
+private const val INTERRUPTED_EXCEPTION_CODE = 0x10001
+private const val GENERIC_EXCEPTION_CODE = 0x10002
+
+/**
+ * Runs program in list [arguments] and saves result to [stdout], [stderr] and [rc].
+ *
+ * A return code of >=0x10000 in [rc] signals an exception with the stack trace
+ * in [stderr].
+ *
+ * ```
+ * val runResult = ExecutionResult(listOf("ebook-meta", "/path/to/epub", "--title", "New Title"))
+ * println("RC = ${runResult.rc}")
+ * ```
+ * @param arguments program and arguments to run
+ * @param throwAtError throw exception at `rc != 0` (defaults to true)
+ * @param workingDir working directory for the program (defaults to ".")
+ * @param timeoutSec timeout in seconds (defaults to 60)
+ *
+ * @property stdout program output to STDOUT
+ * @property stderr program output to STDERR
+ * @property rc return code
+ *
+ * @throws CommandExecutionException if [throwAtError] is true and [rc] is not 0
+ */
+class ExecutionResult(
+    val arguments: List<String>,
+    val throwAtError: Boolean = true,
+    val workingDir: String = ".",
+    val timeoutSec: Long = 60,
+) {
+    val stdout: String
+    val stderr: String
+    val rc: Int
+
+    init {
+        val executionResult = try {
+            executeProcess()
+        } catch (e: Exception) {
+            handleProcessException(e)
+        }
+        stdout = executionResult.first
+        stderr = executionResult.second
+        rc = executionResult.third
+
+        if (rc != 0) {
+            logExecutionError()
+            if (throwAtError) {
+                throw CommandExecutionException("Error executing ${arguments}\nRC = $rc")
+            }
+        }
+    }
+
+    private fun executeProcess(): Triple<String, String, Int> {
+        return ProcessBuilder(arguments)
+            .directory(File(workingDir))
+            .start()
+            .run {
+                waitFor(timeoutSec, TimeUnit.SECONDS)
+                Triple(
+                    inputStream.bufferedReader().use { it.readText() },
+                    errorStream.bufferedReader().use { it.readText() },
+                    exitValue()
+                )
+            }
+    }
+
+    private fun handleProcessException(exception: Exception): Triple<String, String, Int> {
+        val errorCode = when (exception) {
+            is IOException -> IO_EXCEPTION_CODE
+            is InterruptedException -> INTERRUPTED_EXCEPTION_CODE
+            else -> GENERIC_EXCEPTION_CODE
+        }
+        val errorMessage =
+            "${exception::class.simpleName}: ${exception.message}\n${exception.stackTraceToString()}"
+        return Triple("", errorMessage, errorCode)
+    }
+
+    private fun logExecutionError() {
+        println("\n*** ERROR executing $arguments")
+        println("RC = $rc")
+        println("STDOUT:\n$stdout")
+        println("STDERR:\n$stderr")
+        println("***")
+    }
+}

src/main/kotlin/net/keinekekse/version/version.kt

@@ -0,0 +1,218 @@
+package net.keinekekse.version
+
+import java.io.File
+import java.io.IOException
+import java.net.URI
+import java.time.Instant
+import java.time.format.DateTimeFormatter
+import java.time.format.DateTimeParseException
+import java.util.*
+import java.util.concurrent.ConcurrentHashMap
+import java.util.jar.Manifest
+import java.util.regex.Pattern
+
+/**
+ * Version-Info für .jar oder .war
+ *
+ *
+ * Die Versions-Informationen werden aus der Datei META-INF/MANIFEST.MF gelesen.
+ *
+ * Fürs Setzen der Werte in der MANIFEST.MF ist das Gradle version-plugin verantwortlich.
+ *
+ * Das Auslesen der Datei funktioniert für .jar (liegt in /META-INF) und .war (liegt in
+ * /WEB-INF/classes/META-INF) die auf einem Wildfly-Server deployed wurden (für alles Andere wäre es
+ * zu testen)
+ *
+ * @param clazz Klasse aus der jeweiligen .jar oder .war
+ *
+ * ```
+ * val version = Version(this::class.java)
+ * val libraryVersion = Version(Version::class.java)
+ * ```
+ */
+class Version(clazz: Class<*>) {
+
+    val versionObject: VersionNumber
+    private val attributes: MutableMap<String, String>
+
+    init {
+        val manifestPath = determineManifestPath(clazz)
+        attributes = loadManifestAttributes(manifestPath)
+        versionObject = initializeVersionNumbers()
+    }
+
+    // TODO noch nicht für WAR getestet!!
+    private fun determineManifestPath(clazz: Class<*>): String {
+        val classResourcePath = clazz.getResource("${clazz.simpleName}.class")?.toString() ?: ""
+        val baseFolder = if (classResourcePath.contains(WEB_INF_PATH)) {
+            classResourcePath.substringBefore(WEB_INF_PATH) + MANIFEST_FILE_PATH
+        } else {
+            classResourcePath.substringBefore(
+                clazz.name.replace(
+                    '.',
+                    File.separatorChar
+                ) + CLASS_EXTENSION
+            ) + MANIFEST_FILE_PATH
+        }
+        return baseFolder
+    }
+
+    private fun loadManifestAttributes(manifestPath: String): MutableMap<String, String> {
+        val attributes = ConcurrentHashMap<String, String>()
+
+        try {
+            URI(manifestPath).toURL().openStream().use {
+                val manifest = Manifest(it)
+                manifest.mainAttributes.forEach { key, value ->
+                    attributes[key.toString()] = value.toString()
+                }
+            }
+        } catch (e: IOException) {
+            throw RuntimeException("Failed to read MANIFEST.MF at $manifestPath", e)
+        }
+
+        return attributes
+    }
+
+    private fun initializeVersionNumbers(): VersionNumber {
+        return VersionNumber(
+            attributes[PROP_VERSION] ?: "",
+            attributes[PROP_BUILD_TIMESTAMP] ?: "",
+            attributes[PROP_BUILD_NUMBER] ?: ""
+        )
+    }
+
+    val infoString: String
+        get() = "$displayname $fullVersion $copyright"
+
+    val displayname: String
+        get() = attributes[PROP_DISPLAYNAME] ?: ""
+
+    val copyright: String
+        get() = attributes[PROP_COPYRIGHT] ?: ""
+
+    val name: String
+        get() = attributes[PROP_NAME] ?: ""
+
+    val description: String
+        get() = attributes[PROP_DESCRIPTION] ?: ""
+
+    val version: String
+        get() = versionObject.version
+
+    val fullVersion: String
+        get() = versionObject.fullVersion
+
+    val major: Int
+        get() = versionObject.major
+
+    val minor: Int
+        get() = versionObject.minor
+
+    val patch: Int
+        get() = versionObject.patch
+
+    val identifier: String
+        get() = versionObject.identifier
+
+    val build: String
+        get() = versionObject.build
+
+    val buildTimestamp: String
+        get() = versionObject.buildTimestamp
+
+    companion object {
+        private const val PROP_NAME = "module-name"
+        private const val PROP_DISPLAYNAME = "displayname"
+        private const val PROP_COPYRIGHT = "copyright"
+        private const val PROP_DESCRIPTION = "description"
+        private const val PROP_VERSION = "version"
+        private const val PROP_BUILD_TIMESTAMP = "build-timestamp"
+        private const val PROP_BUILD_NUMBER = "build-number"
+
+        private const val MANIFEST_FILE_PATH = "META-INF/MANIFEST.MF"
+        private const val CLASS_EXTENSION = ".class"
+        private const val WEB_INF_PATH = "WEB-INF/classes"
+    }
+}
+
+/**
+ * Versions-Nr. zerlegen<br></br>
+ * <br></br>
+ * Folgendes Format wird verstanden: [v]int[.int[.int]][-|.alpha|rc ..][-|.build-Nr. o.ä.]<br></br>
+ * Ergebnis:<br></br>
+ *
+ * <pre>`String.format("%d.%d.%d-%s-%s", getMajor(), getMinor(), getPatch(), getIdentifier(), getBuild());
+`</pre> *
+ *
+ * <br></br>
+ * Außerdem wird Der Maven Build-Timestamp als String des Formats `"yyyy-MM-dd @HH:mm:ss"`
+ * sowie als `long mavenEpochSeconds` gespeichert. Falls die übergebene Version keinen
+ * Build-String enthält wird statt dessen `mavenEpochSeconds` verwendet.
+ */
+class VersionNumber(val version: String, timestamp: String, buildNumber: String = "") {
+    private companion object {
+        const val VERSION_REGEX = """v?(\d+)(?:\.(\d+))?(?:\.(\d+))?(?:[-.](\w+))?(?:[-.](.*))?"""
+        val DATE_TIME_FORMATTER: DateTimeFormatter =
+            DateTimeFormatter.ofPattern("yyyy-MM-dd @HH:mm:ss")
+    }
+
+    var major: Int = 0
+        private set
+    var minor: Int = 0
+        private set
+    var patch: Int = 0
+        private set
+    var identifier: String = "" // e.g., "alpha", etc.
+        private set
+    var build: String = "" // Build metadata, e.g., "Timestamp" or "SNAPSHOT"
+        private set
+    var buildTimestamp: String = ""
+        private set
+    var buildEpochSeconds: Long = 0
+        private set
+
+    init {
+        parseVersion(version)
+        initializeBuildTimestamp(timestamp)
+        if (buildNumber.isNotEmpty()) {
+            build = buildNumber
+        }
+    }
+
+    val fullVersion: String
+        get() = if (identifier.isEmpty()) {
+            "$major.$minor.$patch (build $build)"
+        } else {
+            "$major.$minor.$patch-$identifier-$build"
+        }
+
+    private fun parseVersion(version: String) {
+        val pattern = Pattern.compile(VERSION_REGEX)
+        val matcher = pattern.matcher(version)
+        if (matcher.matches()) {
+            major = parseVersionComponent(matcher.group(1))
+            minor = parseVersionComponent(matcher.group(2))
+            patch = parseVersionComponent(matcher.group(3))
+            identifier = matcher.group(4) ?: ""
+            build = resolveBuildMetadata(matcher.group(5) ?: "")
+        }
+    }
+
+    private fun parseVersionComponent(value: String?) = value?.toIntOrNull() ?: 0
+
+    private fun resolveBuildMetadata(extractedBuild: String): String {
+        return if (extractedBuild.isNotEmpty()) extractedBuild else buildEpochSeconds.toString()
+    }
+
+    private fun initializeBuildTimestamp(timestamp: String) {
+        try {
+            val instant = Instant.parse(timestamp)
+            val date = instant.atZone(TimeZone.getDefault().toZoneId())
+            buildEpochSeconds = date.toEpochSecond()
+            buildTimestamp = date.format(DATE_TIME_FORMATTER)
+        } catch (e: DateTimeParseException) {
+            buildTimestamp = "Invalid timestamp"
+        }
+    }
+}