mise

mise is a polyglot tool version manager and task runner. A single mise.toml replaces Makefiles, shell scripts, and language-specific version managers (nvm, pyenv, rustup). It manages tool versions, defines project tasks, and sets environment variables from one configuration file.

Config File Structure

Order sections canonically for consistency:

min_version = "2024.9.5"

[env]
DATABASE_URL = "postgres://localhost/myapp_dev"

[tools]
python = "3.12"

[tasks]
test.run = "pytest"