A standalone project switcher for development environments, inspired by virtualenvwrapper's workon command.

• Quick switching between development projects
• Automatic virtual environment activation (.venv)
• Custom init commands per project
• Tab completion for project names
• Simple JSON configuration
• Cross-platform (Linux, macOS, Windows)

cargo install --path .

cargo install dev-on

The dev-on binary handles configuration management and project lookup.

Add to your .bashrc or .bash_profile:

source /path/to/dev-on/shell/devon.bash

Or copy the wrapper to your dotfiles and source it from there.

dev-on init

This creates ~/.devon.json with an empty project list.

# Simple project (auto-activates .venv if present)
dev-on add myproject /path/to/myproject

# With custom init command
dev-on add myproject /path/to/myproject --init "source .venv/bin/activate"

# With multiple init commands
dev-on add myproject /path/to/myproject --init "source .venv/bin/activate" --init "export DEBUG=true"

devon myproject

This will:

1. Change to the project directory
2. Run any configured init commands
3. Auto-activate .venv if no init commands are specified

devon-list
# or
dev-on list

devon-edit
# or
dev-on edit

Opens ~/.devon.json in your $EDITOR.

dev-on remove myproject

Configuration is stored in ~/.devon.json:

{
  "projects": {
    "myproject": {
      "path": "/home/user/projects/myproject",
      "init": [
        "source .venv/bin/activate",
        "export DJANGO_SETTINGS_MODULE=myproject.settings.dev"
      ]
    },
    "another": {
      "path": "/home/user/projects/another",
      "init": []
    }
  }
}

• dev-on init - Initialize config file
• dev-on get <project> - Get project path and init commands (used by shell wrapper)
• dev-on list - List all projects
• dev-on add <alias> <path> [--init <cmd>] - Add a project
• dev-on remove <alias> - Remove a project
• dev-on edit - Edit config file

• devon <project> - Switch to project
• devon-list - List projects
• devon-add - Add project (passes through to dev-on add)
• devon-edit - Edit config (passes through to dev-on edit)

• Single fast binary with no runtime dependencies
• Cross-platform support
• Type-safe configuration handling
• Easy distribution via cargo

MIT