nix flakes support #64

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sb10q merged 7 commits from mwojcik/thermostat:nixflakes into master 2022-01-19 11:13:47 +08:00
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### Reproducible build with Nix
See the `mcu` folder of the [nix-scripts repository](https://git.m-labs.hk/M-Labs/nix-scripts).
Thermostat firmware is packaged using the [Nix](https://nixos.org) Flakes system. Install Nix 2.4+ and enable flakes by adding ``experimental-features = nix-command flakes`` to ``nix.conf`` (e.g. ``~/.config/nix/nix.conf``).
Once you have Flakes enabled, you can use ``nix build`` to build the firmware.
### Development environment
Clone this repository and [nix-scripts](https://git.m-labs.hk/M-Labs/nix-scripts).
Clone this repository and with Nix Flakes enabled, use the following commands:
```shell
nix-shell -I nix-scripts=[path to nix-scripts checkout]
nix develop
cargo build --release
```
The resulting ELF file will be located under `target/thumbv7em-none-eabihf/release/thermostat`
The resulting ELF file will be located under `target/thumbv7em-none-eabihf/release/thermostat`.
Alternatively, you can install the Rust toolchain without Nix using rustup; see the channel manifest file in nix-scripts (`channel-rust-nightly.toml`) to determine which Rust version to use.
Alternatively, you can install the Rust toolchain without Nix using rustup; see the Rust manifest file pulled in `flake.nix` to determine which Rust version to use.
## Debugging