mastodon/docs/DEVELOPMENT.md

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# Development
## Overview
Before starting local development, read the [CONTRIBUTING] guide to understand
what changes are desirable and what general processes to use.
## Environments
### Vagrant
A **Vagrant** configuration is included for development purposes. To use it,
complete the following steps:
- Install Vagrant and Virtualbox
- Install the `vagrant-hostsupdater` plugin:
`vagrant plugin install vagrant-hostsupdater`
- Run `vagrant up`
- Run `vagrant ssh -c "cd /vagrant && bin/dev"`
- Open `http://mastodon.local` in your browser
### macOS
To set up **macOS** for native development, complete the following steps:
- Install [Homebrew] and run:
`brew install postgresql@14 redis imagemagick libidn nvm`
to install the required project dependencies
- Use a Ruby version manager to activate the ruby in `.ruby-version` and run
`nvm use` to activate the node version from `.nvmrc`
- Run the `bin/setup` script, which will install the required ruby gems and node
packages and prepare the database for local development
- Finally, run the `bin/dev` script which will launch services via `overmind`
(if installed) or `foreman`
### Docker
For production hosting and deployment with **Docker**, use the `Dockerfile` and
`docker-compose.yml` in the project root directory.
For local development, install and launch [Docker], and run:
```shell
docker compose -f .devcontainer/compose.yaml up -d
docker compose -f .devcontainer/compose.yaml exec app bin/setup
docker compose -f .devcontainer/compose.yaml exec app bin/dev
```
### Dev Containers
Within IDEs that support the [Development Containers] specification, start the
"Mastodon on local machine" container from the editor. The necessary `docker
compose` commands to build and setup the container should run automatically. For
**Visual Studio Code** this requires installing the [Dev Container extension].
### GitHub Codespaces
[GitHub Codespaces] provides a web-based version of VS Code and a cloud hosted
development environment configured with the software needed for this project.
[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)][codespace]
- Click the button to create a new codespace, and confirm the options
- Wait for the environment to build (takes a few minutes)
- When the editor is ready, run `bin/dev` in the terminal
- Wait for an _Open in Browser_ prompt. This will open Mastodon
- On the _Ports_ tab "stream" setting change _Port visibility__Public_
[codespace]: https://codespaces.new/mastodon/mastodon?quickstart=1&devcontainer_path=.devcontainer%2Fcodespaces%2Fdevcontainer.json
[CONTRIBUTING]: CONTRIBUTING.md
[Dev Container extension]: https://containers.dev/supporting#dev-containers
[Development Containers]: https://containers.dev/supporting
[Docker]: https://docs.docker.com
[GitHub Codespaces]: https://docs.github.com/en/codespaces
[Homebrew]: https://brew.sh