One tool to manage ALL your development environment versions. Stop juggling pyenv, nvm, rbenv, and a dozen other tools!

The Problem: Every language has its own version manager with its own commands:

• Python → pyenv
• Node → nvm
• Ruby → rbenv
• Java → update-alternatives
• Go → manual installs

The Solution: ONE consistent interface for everything!

devenv use python 3.11
devenv use node 18
devenv status

curl -sSL https://raw.githubusercontent.com/strabo231/devenv/main/install.sh | bash

# See what's currently active
devenv status

# Switch versions
devenv use python 3.11
devenv use node 18

# Auto-detect project requirements
devenv detect

# List available versions
devenv list python

use <lang> <version>    Switch to a version
status                  Show all active versions
current <lang>          Show current version
list <lang>             List available versions
detect                  Auto-detect from project files

✅ Python (via pyenv or system)
✅ Node.js (via nvm or system)
✅ Java (via update-alternatives)
✅ Ruby (via rbenv or system)
✅ Go (via system)

🔄 Consistent interface - Same commands for all languages
🎯 Auto-detection - Reads .python-version, .nvmrc, etc.
📊 Clear status - See all active versions at once
⚡ Fast switching - Change versions instantly
🔧 Wraps existing tools - Uses pyenv, nvm, rbenv under the hood
📝 Project aware - Detects requirements from project files

Switch Python version:

devenv use python 3.11
# ✓ Python switched to 3.11
# ℹ Current: 3.11.0

Check all versions:

devenv status
# Python:  3.11.0
# Node:    18.17.0
# Java:    17.0.2
# Ruby:    3.2.0
# Go:      1.21.0

Auto-detect project needs:

cd myproject
devenv detect
# ✓ Found .python-version: 3.11
# ℹ Run: devenv use python 3.11
# ✓ Found package.json (Node project)
# ℹ Required Node: >=18.0.0

DevEnv auto-detects versions from:

• .python-version
• .nvmrc
• .node-version
• .ruby-version
• package.json (engines field)
• pyproject.toml
• .tool-versions (asdf compatible)

DevEnv is a smart wrapper that:

1. Checks if you have the appropriate version manager (pyenv, nvm, etc.)
2. Uses that tool to switch versions
3. Provides helpful guidance if tools aren't installed
4. Works with system versions as fallback

DevEnv works best with these version managers installed:

• pyenv for Python: curl https://pyenv.run | bash
• nvm for Node: curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.0/install.sh | bash
• rbenv for Ruby: curl -fsSL https://github.com/rbenv/rbenv-installer/raw/main/bin/rbenv-installer | bash

But will work with system versions if these aren't available!

• Version switching for Python, Node, Ruby, Java, Go
• Status overview
• Project detection
• Auto-install missing versions
• Dependency management integration
• Project-specific environments (.devenv file)
• Shell integration for auto-switching

MIT License - see LICENSE

Sean - @strabo231

One tool. All languages. Simple. 🚀