Skip to content


Before submitting a PR, unless it's something obvious, consider filing an issue or simply mention what you plan to do in the Discord. PRs are often either rejected or need to change significantly after submission so make sure before you start working on something it won't be a wasted effort.

Dev Container

There is a docker setup that makes development with mise easier. It is especially helpful for running the E2E tests. Here's some example ways to use it:

mise run docker:cargo build
mise run docker:cargo test
mise run docker:mise --help # run `mise --help` in the dev container
mise run docker:mise run test:e2e # run the e2e tests inside of the docker container
mise run docker:e2e # shortcut for `mise run docker:mise run test:e2e`


Unit Tests

Unit tests are used for fast, relatively simple logic. They can be run with cargo test. The dev container is recommended for executing since it does not require having a proper local setup.

To run locally you will need to first disable mise if you are using it.

mise run docker:cargo test
cargo test

E2E Tests

Like unit tests, the e2e tests should be run either in the dev container (recommended) or with mise disabled locally.

mise run docker:e2e
mise run test:e2e

Slow tests do not run by default or on PRs. They can be manually enabled with TEST_ALL=1.


  • rust stable 1.70.0+ (I test with the beta channel locally, but CI uses stable, you can use whatever)
  • just this should be removed in favor of mise tasks but it's still used for some things.


Mise uses mise itself to run tasks. See available tasks with mise tasks:

~/src/mise ❯ mise tasks
build                                                        ~/src/mise/.mise.toml          
clean                                                        ~/src/mise/.mise.toml          
docker:cargo        run cargo inside of development docker ~/src/mise/.mise.toml          
docker:e2e          run e2e tests inside of development doc… ~/src/mise/.mise.toml          
docker:image        build docker image from Dockerfile       ~/src/mise/.mise.toml          
docker:mise         run mise inside of development docker c… ~/src/mise/.mise.toml          
format                                                       ~/src/mise/.mise.toml          
lint                                                         ~/src/mise/.mise/config.toml   
lint:fix                                                     ~/src/mise/.mise.toml          
release                                                      ~/src/mise/.mise.toml          
render                                                       ~/src/mise/.mise.toml          
render:completions                                           ~/src/mise/.mise.toml          
render:help                                                  ~/src/mise/.mise.toml          
render:mangen                                                ~/src/mise/.mise.toml          
signal-test                                                  ~/src/mise/.mise.toml          
snapshots           Update test snapshots                    ~/src/mise/.mise.toml          
test                                                         ~/src/mise/.mise.toml          
test:e2e                                                     ~/src/mise/.mise.toml


Shouldn't require anything special I'm aware of, but mise run build is a good sanity check to run and make sure it's all working.

Pre-commit hook

You can optionally run a pre-commit hook which lints the codebase and updates generated code. To do this, install lefthook and run lefthook install.

Running the CLI

Even if using the devcontainer, it's a good idea to create a shim to make it easy to launch mise. I use the following shim in ~/.local/bin/@mise:

exec cargo run -q --all-features --manifest-path ~/src/mise/Cargo.toml -- "$@"

::: note Don't forget to change the manifest path to the correct path for your setup. :::

Then if that is in PATH just use @mise to run mise by compiling it on the fly.

@mise --help
@mise run docker:e2e
eval "$(@mise activate zsh)"
@mise activate fish | source


Run mise run release -x [minor|patch]. (minor if it is the first release in a month)


  • Lint codebase: mise run lint
  • Lint and fix codebase: mise run lint:fix

Generating readme and shell completion files

mise run render

Testing packaging

This is only necessary to test if actually changing the packaging setup.

Ubuntu (apt)

This is for arm64, but you can change the arch to amd64 if you want.

docker run -ti --rm ubuntu
apt update -y
apt install -y gpg sudo wget curl
sudo install -dm 755 /etc/apt/keyrings
wget -qO - | gpg --dearmor | sudo tee /etc/apt/keyrings/mise-archive-keyring.gpg 1> /dev/null
echo "deb [signed-by=/etc/apt/keyrings/mise-archive-keyring.gpg arch=arm64] stable main" | sudo tee /etc/apt/sources.list.d/mise.list
apt update
apt install -y mise
mise -V

Amazon Linux 2 (yum)

docker run -ti --rm amazonlinux
yum install -y yum-utils
yum-config-manager --add-repo
yum install -y mise
mise -v

Fedora (dnf)

docker run -ti --rm fedora
dnf install -y dnf-plugins-core
dnf config-manager --add-repo
dnf install -y mise
mise -v

Licensed under the MIT License. Maintained by @jdx and friends.