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https://github.com/dfinity/motoko-base

The Motoko base library
https://github.com/dfinity/motoko-base

internet-computer library modules motoko

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The Motoko base library

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The Motoko base library

=======================



This repository contains the Motoko base library. It is intended to be used with the [`moc` compiler](https://github.com/dfinity/motoko) (and tools that wrap it, like `dfx`).



Usage

-----



If you are installing Motoko through the DFINITY SDK releases, then this base

library is already included.



If you build your project using the [Mops package manager], run the following command to add the base package to your project:



```sh

mops add base

```



If you build your project using the [Vessel package manager] your package-set most likely already includes base, but if it doesn't or you want to override its version, add an entry like so to your `package-set.dhall`:



```

  {

    name = "base",

    repo = "https://github.com/dfinity/motoko-base",

    version = "master",

    dependencies = [] : List Text

  }

```



The package _name_ `"base"` appears when importing its modules in Motoko (e.g., `import "mo:base/Nat"`).  The _repo_ may either be your local clone path, or this public repository url, as above.  The _version_ can be any git branch or tag name (such as `version = "moc-0.8.4"`).  There are no dependencies.  See the [Vessel package manager] docs for more details.



[Mops package manager]: https://mops.one



[Vessel package manager]: https://github.com/dfinity/vessel



Building & Testing

------------------



Run the following commands to configure your local development branch:



```sh

# First-time setup

git clone https://github.com/dfinity/motoko-base

cd motoko-base

npm install



# Run tests

npm test



# Run all tests in wasi mode

npm test -- --mode wasi



# Run formatter

npm run prettier:format

```



**Note**:

- If you are using `npm test` to run the tests:

  - You don't need to install any additional dependencies.

  - The test runner will automatically download the `moc` and `wasmtime` versions specified in `mops.toml` in the `[toolchain]` section.



- If you are using `Makefile` to run the tests:

  - The test runner will automatically detect the `moc` compiler from your system path or `dfx` installation.



  - Running the tests locally also requires [Wasmtime](https://wasmtime.dev/) and [Vessel](https://github.com/dfinity/vessel) to be installed on your system.



Run only specific test files:

```sh

npm test 

```



For example `npm test list` will run `List.test.mo` and `AssocList.test.mo` test files.



Run tests in watch mode:

```sh

npm test -- --watch



# useful to combine with filter when writing tests

npm test array -- --watch

```



Documentation

-------------



The documentation can be generated in `doc/` by running



```sh

./make_docs.sh

```



which creates `_out/html/index.html`.



The `next-moc` branch

---------------------



The `next-moc` branch contains changes that make base compatible with the

in-development version of `moc`. This repository's public CI does _not_ run

on that branch.



External contributions are best made against `master`.



Contributing

------------



Please read the [Interface Design Guide for Motoko Base Library](doc/design.md) before making a pull request.