Add CI workflow

* Add CI workflow

* Update README

.github/workflows/rust.yml

@@ -0,0 +1,42 @@
+name: Build
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: awalsh128/cache-apt-pkgs-action@latest
+      with:
+          packages: libudev-dev
+          version: 1.0
+    - name: Build
+      run: cargo build --verbose
+    - name: Run tests
+      run: RUST_LOG=trace cargo test --verbose
+
+  format:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Format
+      run:  cargo fmt --all --check
+
+  clippy:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: awalsh128/cache-apt-pkgs-action@latest
+      with:
+          packages: libudev-dev
+          version: 1.0
+    - name: Run Clippy
+      run: cargo clippy

README.md

@@ -3,6 +3,7 @@
 [![Documentation](https://img.shields.io/docsrs/coldcard)](https://docs.rs/coldcard/latest/coldcard/)
 [![Crates.io](https://img.shields.io/crates/v/coldcard.svg)](https://crates.io/crates/coldcard)
 [![License](https://img.shields.io/crates/l/coldcard.svg)](https://github.com/alfred-hodler/rust-coldcard/blob/master/coldcard/LICENSE)
+[![Test Status](https://github.com/alfred-hodler/rust-coldcard/actions/workflows/rust.yml/badge.svg?branch=master)](https://github.com/alfred-hodler/rust-coldcard/actions)
 
 This is a workspace that contains crates used for interfacing with the [Coldcard](https://coldcard.com/) hardware wallet.
 
@@ -22,4 +23,4 @@ Contributions are welcome. Before making large changes, please open an issue fir
 
 ## Disclaimer
 
-This is not an official project and comes with no warranty whatsoever.
+This is not an official project and comes with no warranty whatsoever.

coldcard/README.md

@@ -14,8 +14,7 @@ let mut api = coldcard::Api::new()?;
 let serials = api.detect()?;
 
 // get the first serial and open it
-let first = serials.into_iter().next().unwrap();
-let (mut cc, master_xpub) = api.open(first, None).unwrap();
+let (mut cc, master_xpub) = api.open(&serials[0], None)?;
 
 // set a passphrase
 coldcard.set_passphrase(protocol::Passphrase::new("secret")?)?;
@@ -33,7 +32,7 @@ coldcard.logout()?;
 
 ## Linux Specific Instructions
 
-In order to be able to detect a Coldcard device on a Linux system, [51-coinkite.rules](../51-coinkite.rules) must be placed in `/etc/udev/rules.d/`.
+In order to be able to detect a Coldcard device on a Linux system, [51-coinkite.rules](../51-coinkite.rules) must be placed in `/etc/udev/rules.d/`. This can be installed using the CLI tool.
 
 Two mutually exclusive HID backends are supported and can be turned on using the following features:
 
@@ -60,4 +59,4 @@ Contributions are welcome. Before making large changes, please open an issue fir
 
 ## Disclaimer
 
-This is not an official project and comes with no warranty whatsoever.
+This is not an official project and comes with no warranty whatsoever.