Switch to using GitHub Actions for CI

.github/workflows/ci.yaml

@@ -0,0 +1,61 @@
+name: CI
+
+on:
+  push:
+    branches: [master, staging, trying]
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        rust:
+          - stable
+          - beta
+          - nightly
+          - 1.51.0  # Minimum supported rust version (MSRV)
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.rust }}
+          override: true
+          components: rustfmt, clippy
+
+      - name: Install additional tooling
+        run: |
+          bash ci/install.sh
+          echo "PATH=$PATH:$PWD/gcc/bin:$PWD/qemu" >> $GITHUB_ENV
+        env:
+          RUST_VERSION: ${{ matrix.rust }}
+
+      - name: Test
+        run: bash ci/script.sh
+
+  deploy:
+    runs-on: ubuntu-latest
+
+    needs: [build]
+
+    if: github.ref == 'refs/heads/master'
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install mdbook
+        run: sh ci/install-mdbook.sh
+
+      - name: Build the book
+        run: mdbook build
+
+      - name: Deploy
+        uses: JamesIves/[email protected]
+        with:
+          branch: gh-pages
+          folder: book

ci/install-mdbook.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env sh
+
+set -eo pipefail
+
+
+tag=$(git ls-remote --tags --refs --exit-code https://github.com/rust-lang/mdbook \
+          | grep -Eo 'v[0-9.]+$' \
+          | sort --version-sort \
+          | tail -n1)
+
+curl -LSfs https://japaric.github.io/trust/install.sh | \
+    sh -s -- --git rust-lang/mdbook --tag $tag

ci/install.sh

@@ -1,14 +1,7 @@
 set -euxo pipefail
 
 main() {
-    local tag=$(git ls-remote --tags --refs --exit-code https://github.com/rust-lang-nursery/mdbook \
-                    | cut -d/ -f3 \
-                    | grep -E '^v[0-9.]+$' \
-                    | sort --version-sort \
-                    | tail -n1)
-
-    curl -LSfs https://japaric.github.io/trust/install.sh | \
-        sh -s -- --git rust-lang-nursery/mdbook --tag $tag
+    sh ./ci/install-mdbook.sh
 
     rustup target add thumbv7m-none-eabi
 

ci/script.sh

@@ -86,7 +86,7 @@ main() {
     popd
 
     # NOTE(nightly) this will require nightly until core::arch::arm::udf is stabilized
-    if [ $TRAVIS_RUST_VERSION = nightly ]; then
+    if [ $RUST_VERSION = nightly ]; then
         pushd app4
         cargo build
         qemu_check target/thumbv7m-none-eabi/debug/app
@@ -98,7 +98,7 @@ main() {
 
     # # exception handling
     # NOTE(nightly) this will require nightly until core::arch::arm::udf is stabilized
-    if [ $TRAVIS_RUST_VERSION = nightly ]; then
+    if [ $RUST_VERSION = nightly ]; then
         pushd exceptions
 
         # check that the disassembly matches
@@ -231,7 +231,7 @@ main() {
 
     # # DMA
     # NOTE(nightly) this will require nightly until core::pin is stabilized (1.33)
-    if [ $TRAVIS_RUST_VERSION = nightly ]; then
+    if [ $RUST_VERSION = nightly ]; then
         pushd dma
         cargo build --examples
         popd
@@ -260,7 +260,4 @@ qemu_check() {
     rm .stdout .stderr
 }
 
-# don't run this on successful merges
-if [[ $TRAVIS_BRANCH != main || $TRAVIS_PULL_REQUEST != false ]]; then
-    main
-fi
+main