lighthouse/docs/env.md

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# Development Environment Setup
_This document describes how to setup a development environment. It is intended
for software developers and researchers who wish to contribute to development._
Lighthouse is a Rust project and [`cargo`](https://doc.rust-lang.org/cargo/) is
used extensively. As such, you'll need to install Rust in order to build the
project. Generally, Rust is installed using the
[rustup](https://www.rust-lang.org/tools/install) tool-chain manager.
## Steps
A fully-featured development environment can be achieved with the following
steps:
1. Install [rustup](https://rustup.rs/).
1. Use the command `rustup show` to get information about the Rust
installation. You should see that the active tool-chain is the stable
version.
- Updates can be performed using` rustup update`, Lighthouse generally
requires a recent version of Rust.
1. Install build dependencies (Arch packages are listed here, your
distribution will likely be similar):
- `clang`: required by RocksDB.
- `protobuf`: required for protobuf serialization (gRPC).
- `cmake`: required for building protobuf
- `git-lfs`: The Git extension for [Large File
Support](https://git-lfs.github.com/) (required for Ethereum Foundation
test vectors).
1. Clone the repository with submodules: `git clone --recursive
https://github.com/sigp/lighthouse`. If you're already cloned the repo,
ensure testing submodules are present: `$ git submodule init; git
submodule update`
1. Change directory to the root of the repository.
1. Run the test suite with `cargo test --all --release`. The build and test
process can take several minutes. If you experience any failures on
`master`, please raise an
[issue](https://github.com/sigp/lighthouse/issues).
## Notes:
Lighthouse targets Rust `stable` but generally runs on `nightly` too.
### Note for Windows users:
Perl may also be required to build lighthouse. You can install [Strawberry
Perl](http://strawberryperl.com/), or alternatively use a choco install command
`choco install strawberryperl`.
Additionally, the dependency `protoc-grpcio v0.3.1` is reported to have issues
compiling in Windows. You can specify a known working version by editing
version in `protos/Cargo.toml` section to `protoc-grpcio = "<=0.3.0"`.