Switch to using GitHub Actions for CI

.github/bors.toml

@@ -1,4 +1,4 @@
 block_labels = ["needs-decision"]
 delete_merged_branches = true
 required_approvals = 1
-status = ["continuous-integration/travis-ci/push"]
+status = ["build"]

.github/workflows/ci.yaml

@@ -0,0 +1,115 @@
+name: CI
+
+on:
+  push:
+    branches: [master, staging, trying]
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+
+    continue-on-error: ${{ matrix.experimental || false }}
+
+    strategy:
+      matrix:
+        rust:
+          - stable
+          - beta
+          - nightly
+          - 1.51.0  # Minimum supported rust version (MSRV)
+        include: 
+          - rust: nightly
+            experimental: true
+
+    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 Python dependencies
+        run: |
+          pip3 install --user python-dateutil linkchecker
+
+      - name: Cache installed binaries
+        uses: actions/cache@v1
+        id: cache-bin
+        with:
+          path: ~/cache-bin
+          key: cache-bin
+
+      - name: Install mdbook
+        if: steps.cache-bin.outputs.cache-hit != 'true'
+        uses: actions-rs/[email protected]
+        with:
+          crate: mdbook
+          version: latest
+
+      - name: Install cargo-binutils
+        if: steps.cache-bin.outputs.cache-hit != 'true'
+        uses: actions-rs/[email protected]
+        with:
+          crate: cargo-binutils
+          version: latest
+
+      - name: Install arm-none-eabi-gcc and qemu
+        if: steps.cache-bin.outputs.cache-hit != 'true'
+        run: |
+          mkdir gcc
+          curl -L https://developer.arm.com/-/media/Files/downloads/gnu-rm/7-2018q2/gcc-arm-none-eabi-7-2018-q2-update-linux.tar.bz2?revision=bc2c96c0-14b5-4bb4-9f18-bceb4050fee7?product=GNU%20Arm%20Embedded%20Toolchain,64-bit,,Linux,7-2018-q2-update \
+            | tar --strip-components=1 -C gcc -xj
+          cp gcc/bin/* ~/cache-bin
+
+          curl -L https://github.com/japaric/qemu-bin/raw/master/14.04/qemu-system-arm-2.12.0 \
+            > ~/cache-bin/qemu-system-arm
+          chmod a+x ~/cache-bin/qemu-system-arm
+
+      - name: Copy installed binaries to cache directory
+        if: steps.cache-bin.outputs.cache-hit != 'true'
+        run: |
+          mkdir ~/cache-bin
+          cp ~/.cargo/bin/* ~/cache-bin
+
+      - name: Put new bin directory into path
+        run: echo "~/cache-bin" >> $GITHUB_PATH
+
+      - name: Test
+        run: bash ci/script.sh
+        env:
+          RUST_VERSION: ${{ matrix.rust }}
+
+  deploy:
+    runs-on: ubuntu-latest
+
+    needs: [build]
+
+    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Cache installed binaries
+        uses: actions/cache@v1
+        id: cache-bin
+        with:
+          path: ~/cache-bin
+          key: cache-bin
+
+      - name: Put new bin directory into path
+        run: echo "~/cache-bin" >> $GITHUB_PATH
+
+      - name: Build the book
+        run: mdbook build
+
+      - name: Deploy book
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: book
+          force_orphan: true

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