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daytona-python-shell

Interactive shell over a temporary Mesa repo running inside a Daytona sandbox, written in Python.

Spins up a Daytona sandbox from an image with Mesa installed, creates and mounts a temporary repo via FUSE, and drops you into a minimal shell. Commands execute inside the sandbox against the mounted filesystem.

Quick start

# Install uv if you don't have it
curl -LsSf https://astral.sh/uv/install.sh | sh

# Create a .env in this directory (gitignored)
cp .env.example .env

# Now populate your .env file with the required credentials

# Run
uv run main.py
Creating Daytona sandbox...
Mounting Mesa...
Connected to ~/.local/share/mesa/mnt/acme/daytona-123456789. Type 'exit' or Ctrl+D to quit.

$ printf 'Hello from Daytona and Mesa!\n' > hello.txt
$ cat hello.txt
Hello from Daytona and Mesa!
$ exit
Cleaning up sandbox and temporary repo...
Bye!

How it works

  1. Builds a Daytona image with Mesa and its FUSE configuration.
  2. Creates a temporary Mesa repo and a Daytona sandbox.
  3. Mints a 30-minute access token restricted to the temporary repo.
  4. Passes MESA_ORG and MESA_ACCESS_TOKEN only to the mesa mount command. The private key never enters the sandbox.
  5. Starts the FUSE daemon (mesa mount --daemonize), then drops you into a REPL in the mounted repo.
  6. Deletes the sandbox and temporary repo when the shell exits.

By default, MesaFS mounts every repo the access token can access. Since this token is restricted to the temporary repo, that is the only repo in the mount.

The REPL (repl.py) tracks your working directory and handles cd, ~ expansion, and relative paths.

Files

File Description
main.py Sandbox setup, Mesa mount, and cleanup
repl.py Tiny REPL with cd and tilde expansion
pyproject.toml Dependencies: daytona, mesa-sdk, python-dotenv

Environment variables

Variable Description
MESA_PRIVATE_KEY Mesa signing private key stored only in the trusted host process
DAYTONA_API_KEY Daytona API key (get one here)

Requirements

  • Python >= 3.11
  • uv (recommended) or pip