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‎README.md‎

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‎installer/mycmd.iss‎

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[Setup]
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AppName=MyCMD
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AppVersion=1.0
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DefaultDirName={pf}\MyCMD
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DefaultGroupName=MyCMD
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OutputBaseFilename=MyCMD-Installer
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SetupIconFile=icons\mycmd.ico
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[Files]
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Source: "dist\bin\MyCMD.exe"; DestDir: "{app}\bin"
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Source: "dist\lib\dependencies.jar"; DestDir: "{app}\lib"
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Source: "dist\icons\mycmd.ico"; DestDir: "{app}\icons"
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[Icons]
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Name: "{group}\MyCMD"; Filename: "{app}\bin\MyCMD.exe"
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Name: "{commondesktop}\MyCMD"; Filename: "{app}\bin\MyCMD.exe"
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[Run]
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Filename: "{app}\bin\MyCMD.exe"; Description: "Launch MyCMD"; Flags: nowait postinstall skipifsilent

‎pom.xml‎

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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
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http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.mycmd</groupId>
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<artifactId>MyCMD</artifactId>
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<version>1.0</version>
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<packaging>jar</packaging>
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<name>MyCMD</name>
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<description>A custom CMD shell written in Java</description>
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<properties>
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<maven.compiler.source>17</maven.compiler.source>
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<maven.compiler.target>17</maven.compiler.target>
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</properties>
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<build>
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<plugins>
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<!-- Creates executable jar -->
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-jar-plugin</artifactId>
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<version>3.3.0</version>
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<configuration>
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<archive>
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<manifest>
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<mainClass>com.mycmd.App</mainClass>
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</manifest>
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</archive>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>

‎scripts/build-linux.sh‎

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#!/bin/bash
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echo "=== Building MyCMD for Linux ==="
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mvn clean package
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rm -rf dist
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mkdir -p dist/bin dist/lib dist/icons
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cp target/MyCMD-1.0.jar dist/lib/dependencies.jar
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cp icons/mycmd.ico dist/icons/mycmd.ico
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# Example jpackage usage
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jpackage \
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--name MyCMD \
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--input dist/lib \
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--main-jar dependencies.jar \
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--main-class com.mycmd.App \
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--icon icons/mycmd.ico \
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--type deb \
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--dest dist
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echo "Build complete. Installer is in dist/"

‎scripts/build-windows.bat‎

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@echo off
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echo === Building MyCMD for Windows ===
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REM Clean and build jar
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mvn clean package
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REM Create dist structure
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rmdir /s /q dist
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mkdir dist\bin
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mkdir dist\lib
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mkdir dist\icons
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REM Copy jar + icon
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copy target\MyCMD-1.0.jar dist\lib\dependencies.jar
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copy icons\mycmd.ico dist\icons\mycmd.ico
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echo Build complete. Use Launch4j + Inno Setup to package installer.

‎src/main/java/com/mycmd/App.java‎

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package com.mycmd;
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import com.mycmd.commands.*;
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import java.util.*;
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public class App {
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public static void main(String[] args) {
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ShellContext context = new ShellContext();
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// Register commands
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Map<String, Command> commands = new HashMap<>();
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registerCommands(commands);
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System.out.println("MyCMD [Version 1.0]");
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System.out.println("(c) 2025 MyCMD Organization. All rights reserved.");
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Scanner sc = new Scanner(System.in);
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while (true) {
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System.out.print(context.getCurrentDir().getAbsolutePath() + ">");
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String input = sc.nextLine().trim();
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if (input.isEmpty()) continue;
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String[] parts = input.split("\\s+");
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String cmd = parts[0].toLowerCase();
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String[] cmdArgs = Arrays.copyOfRange(parts, 1, parts.length);
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Command command = commands.get(cmd);
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if (command != null) {
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try {
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command.execute(cmdArgs, context);
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} catch (Exception e) {
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System.out.println("Error: " + e.getMessage());
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}
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} else {
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System.out.println("'" + cmd + "' is not recognized as an internal or external command.");
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}
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}
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}
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private static void registerCommands(Map<String, Command> commands) {
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commands.put("dir", new DirCommand());
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commands.put("cd", new CdCommand());
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commands.put("echo", new EchoCommand());
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commands.put("mkdir", new MkdirCommand());
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commands.put("rmdir", new RmdirCommand());
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commands.put("copy", new CopyCommand());
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commands.put("del", new DelCommand());
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commands.put("type", new TypeCommand());
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commands.put("cls", new ClsCommand());
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commands.put("help", new HelpCommand(commands));
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commands.put("exit", new ExitCommand());
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commands.put("ver", new VersionCommand());
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}
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}

‎src/main/java/com/mycmd/Command.java‎

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package com.mycmd;
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public interface Command {
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void execute(String[] args, ShellContext context);
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}

‎src/main/java/com/mycmd/ShellContext.java‎

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package com.mycmd;
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import java.io.File;
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public class ShellContext {
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private File currentDir;
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public ShellContext() {
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this.currentDir = new File(System.getProperty("user.dir"));
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}
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public File getCurrentDir() {
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return currentDir;
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}
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public void setCurrentDir(File dir) {
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this.currentDir = dir;
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}
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}

‎src/main/java/com/mycmd/commands/CdCommand.java‎

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package com.mycmd.commands;
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import com.mycmd.Command;
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import com.mycmd.ShellContext;
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import java.io.File;
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public class CdCommand implements Command {
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@Override
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public void execute(String[] args, ShellContext context) {
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if (args.length == 0) {
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System.out.println(context.getCurrentDir().getAbsolutePath());
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return;
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}
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File newDir = new File(args[0]);
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if (!newDir.isAbsolute()) {
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newDir = new File(context.getCurrentDir(), args[0]);
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}
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if (newDir.exists() && newDir.isDirectory()) {
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context.setCurrentDir(newDir);
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} else {
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System.out.println("The system cannot find the path specified.");
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}
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}
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}

‎src/main/java/com/mycmd/commands/ClsCommand.java‎

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package com.mycmd.commands;
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import com.mycmd.Command;
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import com.mycmd.ShellContext;
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public class ClsCommand implements Command {
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@Override
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public void execute(String[] args, ShellContext context) {
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for (int i = 0; i < 50; i++) {
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System.out.println();
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}
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}
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}

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