# balena CLI

The official balena CLI tool.

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## About

The balena CLI (Command-Line Interface) allows you to interact with the balenaCloud and the
[balena API](https://www.balena.io/docs/reference/api/overview/) through a terminal window
on Linux, macOS or Windows. You can also write shell scripts around it, or import its Node.js
modules to use it programmatically.
As an [open-source project on GitHub](https://github.com/balena-io/balena-cli/), your contribution
is also welcome!

## Installation

Check the [balena CLI installation instructions on GitHub](https://github.com/balena-io/balena-cli/blob/master/INSTALL.md).

## Getting Started

### Choosing a shell (command prompt/terminal)

On **Windows,** the standard Command Prompt (`cmd.exe`) and
[PowerShell](https://docs.microsoft.com/en-us/powershell/scripting/getting-started/getting-started-with-windows-powershell?view=powershell-6)
are supported. We are aware of users also having a good experience with alternative shells,
including:

* Microsoft's [Windows Subsystem for Linux](https://docs.microsoft.com/en-us/windows/wsl/about)
  (a.k.a. Microsoft's "bash for Windows 10").
* [Git for Windows](https://git-for-windows.github.io/).
* [MinGW](http://www.mingw.org): install the `msys-rsync` and `msys-openssh` packages too.

On **macOS** and **Linux,** the standard terminal window is supported. _Optionally,_ `bash` command
auto completion may be enabled by copying the
[balena-completion.bash](https://github.com/balena-io/balena-cli/blob/master/balena-completion.bash)
file to your system's `bash_completion` directory: check [Docker's command completion
guide](https://docs.docker.com/compose/completion/) for system setup instructions.

### Logging in

Several CLI commands require access to your balenaCloud account, for example in order to push a
new release to your application. Those commands require creating a CLI login session by running:

```sh
$ balena login
```

### Proxy support

HTTP(S) proxies can be configured through any of the following methods, in order of preference:

* Set the \`BALENARC_PROXY\` environment variable in URL format (with protocol, host, port, and
  optionally basic auth).
* Alternatively, use the [balena config file](https://www.npmjs.com/package/balena-settings-client#documentation)
  (project-specific or user-level) and set the \`proxy\` setting. It can be:
  * A string in URL format, or
  * An object in the [global-tunnel-ng options format](https://www.npmjs.com/package/global-tunnel-ng#options) (which allows more control).
* Alternatively, set the conventional \`https_proxy\` / \`HTTPS_PROXY\` / \`http_proxy\` / \`HTTP_PROXY\`
environment variable (in the same standard URL format).

To get a proxy to work with the `balena ssh` command, check the
[installation instructions](https://github.com/balena-io/balena-cli/blob/master/INSTALL.md).

## Command reference documentation

The full CLI command reference is available [on the web](https://www.balena.io/docs/reference/cli/
) or by running `balena help` and `balena help --verbose`.

## Support, FAQ and troubleshooting

If you come across any problems or would like to get in touch:

* Check our [FAQ / troubleshooting document](https://github.com/balena-io/balena-cli/blob/master/TROUBLESHOOTING.md).
* Ask us a question through the [balenaCloud forum](https://forums.balena.io/c/balena-cloud).
* For bug reports or feature requests,
  [have a look at the GitHub issues or create a new one](https://github.com/balena-io/balena-cli/issues/).

## Contributing

The balena CLI is an open source project and your contribution is welcome!

The CLI was originally written in [CoffeeScript](https://coffeescript.org), but we have decided to
migrate to [TypeScript](https://www.typescriptlang.org/) in order to take advantage of static
typing and formal programming interfaces. The migration is taking place gradually, as part of
maintenance work or the implementation of new features.

After cloning this repository and running `npm install` you can build the CLI using `npm run build`.
You can then run the generated build using `./bin/balena`.
In order to ease development:

* you can build the CLI using the `npm run build:fast` variant which skips some of the build steps or
* you can use `./bin/balena-dev` which live transpiles the sources of the CLI.

In either case, before opening a PR be sure to also test your changes with `npm test`.

## Note on editing this README document

This file is edited/created by hand, but it is then automatically parsed to extract selected
subsections for the [CLI's web documentation page](https://www.balena.io/docs/reference/cli/).
The code that parses this file is in [`automation/capitanodoc/capitanodoc.ts`
](https://github.com/balena-io/balena-cli/blob/master/automation/capitanodoc/capitanodoc.ts).

## License

The project is licensed under the [Apache 2.0 License](https://www.apache.org/licenses/LICENSE-2.0).
A copy is also available in the LICENSE file in this repository.