Contributing to vergen

Ensure you have cargo-clippy and rustfmt installed. These can be installed via rustup if you don't already have them.
Fork the repository
Run the following to clone and setup the repository. There are submodules in the testdata directory used for testing specific git scenarios
```
git clone git@github.com:<your fork>/vergen.git
cd vergen.git
git submodule update --init
```
Install cargo-all-features
```
cargo install cargo-all-features
```
Make your changes

Before submitting a PR, make sure you have at least run the following

cargo fmt
cargo clippy --all
cargo build-all-features
cargo test-all-features

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