Lex is a lightweight, simple, terminal-based text editor, inspired by GNU Nano. It focuses on minimalism, speed, and essential features for developers who prefer working in the terminal.

• 🧩 Familiar Interface — Simple layout inspired by Nano
• 🎨 Syntax Highlighting — Supports C, C++, Python, Java, JavaScript, and more
• 🧭 Lightweight & Fast — Minimal resource usage
• 💾 Basic File Operations — Open, edit, save files
• 🧠 Undo/Redo Support
• 🖱️ Optional Mouse Support
• ⚙️ Configurable Settings — Tab width, line numbers, etc.

Requires CMake 3.15+, GCC/Clang, and Make.

# Clone repo
git clone https://github.com/danko1122q/LEX.git && cd LEX

# Build
mkdir build && cd build
cmake ..
make -j$(nproc)

# Install (requires sudo)
sudo make install

One-liner:

git clone https://github.com/danko1122q/LEX.git && cd LEX && mkdir build && cd build && cmake .. && make -j$(nproc) && sudo make install

Default binary location: /usr/local/bin/lex

cd build
sudo make uninstall

cd build
sudo make force-uninstall

Removes binary from:

• /usr/local/bin/lex
• /usr/bin/lex
• ${CMAKE_INSTALL_PREFIX}/bin/lex

sudo rm -f /usr/local/bin/lex
sudo rm -f /usr/bin/lex
which lex # Should show nothing

make -C build purge

Runs uninstall, then deletes the build directory.

lex [filename]    # Open file or new buffer
lex -v            # Show version

• Editor area, Status bar, Command line (optional)

Change editor behavior via prompt (Ctrl+P):

set tabsize 4
set lilex 1
set helpinfo 0

Installation:

• Missing CMake: sudo apt install cmake (Debian/Ubuntu)
• Permission denied: Use sudo
• Build fails: Ensure GCC/Clang installed

Uninstallation:

• install_manifest.txt missing: use sudo make force-uninstall
• Permission denied: run with sudo
• Conflict with system lex: rename project in CMakeLists.txt or install locally with CMAKE_INSTALL_PREFIX=$HOME/.local

Modified MIT License (Non-Commercial). Commercial use requires written permission.

• GNU Nano for inspiration
• Open Source community
• Contributors

• Repository: github.com/danko1122q/LEX
• Issues / Pull Requests: Use