This repository contains my implementation of a custom shell, built as part of the Codecrafters challenge. The shell is written in Java and includes support for various built-in commands and features.

• REPL (Read-Eval-Print Loop) – Interactive command-line processing
• Built-in Commands:
  • echo – Prints text to standard output
  • exit – Terminates the shell
  • type – Identifies whether a command is a built-in function or an executable
  • pwd – Prints the current working directory
  • cd – Changes the current directory
    • Supports absolute paths (e.g., /usr/local/bin)
    • Supports relative paths (e.g., ./, ../, ./dir)
    • Supports ~ for home directory
• Executing External Programs with Arguments (e.g., ls -la, cat file.txt)
• Support for Quoting with Single Quotes ('') to preserve spaces

• Add support for double quotes ("")
• Implement environment variable expansion (e.g., $HOME, $PATH)
• Improve error handling and edge case handling

Codecrafters' Build Your Own Shell challenge.