Set up CI through GitHub Actions (#125)

Try out GitHub Actions for CI

* Install cargo-xbuild

* Use nightly Rust

* Add extra Rust components

* Add code to checkout OVMF

* Install qemu

* Run tests headless and add rustfmt and clippy

Author: GabrielMajeri

.github/workflows/rust.yml

@@ -0,0 +1,80 @@
+name: Rust
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build_and_test:
+    name: Build and run tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    
+    - name: Download OVMF
+      run: |
+        # Save the current branch
+        git branch travis-temp
+        # Checkout the firmware branch
+        git fetch origin ovmf:ovmf
+        git checkout ovmf
+        # Download it with Git LFS
+        git lfs pull
+        # Copy it to the local directory
+        cp -v x86_64/*.fd .
+        # Checkout the original repo back
+        git checkout travis-temp
+        # Move the firmware files to the right directory
+        mv -v *.fd uefi-test-runner
+    
+    - name: Install qemu
+      run: sudo apt-get install qemu -y
+  
+    - name: Install latest nightly
+      uses: actions-rs/toolchain@v1
+      with:
+          toolchain: nightly
+          override: true
+          components: rust-src
+      # TODO: cache Rust binaries
+
+    - name: Install cargo-xbuild
+      run: hash cargo-xbuild || cargo install cargo-xbuild
+      # TODO: cache the built cargo-xbuild binary
+
+    - name: Build
+      run: ./build.py build
+      working-directory: ./uefi-test-runner
+
+    - name: Run tests
+      run: ./build.py run --headless
+      working-directory: ./uefi-test-runner
+      
+  lints:
+    name: Lints
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v2
+
+      - name: Install latest nightly
+        uses: actions-rs/toolchain@v1
+        with:
+            toolchain: nightly
+            override: true
+            components: rustfmt, clippy
+
+      - name: Run cargo fmt
+        uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check
+
+      - name: Run cargo clippy
+        uses: actions-rs/cargo@v1
+        with:
+          command: clippy
+          args: -- -D warnings