Replace TravisCI with Github Actions.

.github/workflows/main.yml

@@ -0,0 +1,83 @@
+name: CI
+
+on:
+  push:
+    branches: [auto]
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  linux-ci:
+    name: Linux
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        toolchain: ["stable", "beta", "nightly", "1.36.0"]
+        include:
+          - toolchain: stable
+            env:
+              DO_FUZZ: 1
+          - toolchain: beta
+            env:
+              DO_FUZZ: 1
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install packages
+        run: sudo apt-get install -y binutils-dev libunwind8-dev libcurl4-openssl-dev libelf-dev libdw-dev cmake gcc libiberty-dev
+
+      - name: Install toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.toolchain }}
+          override: true
+
+      - name: Cargo build
+        run: cargo build --verbose
+
+      - name: Cargo test
+        run: cargo test --verbose
+
+      - name: Cargo test w/ serde
+        run: cargo test --verbose --features serde
+
+      - name: Cargo check w/o default features
+        if: matrix.toolchain == 'nightly'
+        run: cargo check --verbose --no-default-features
+
+      - name: Cargo test w/ union
+        if: matrix.toolchain == 'beta'
+        run: cargo test --verbose --features union
+
+      - name: Cargo test all features
+        if: matrix.toolchain == 'nightly'
+        run: cargo test --verbose --all-features
+
+      - name: Cargo bench
+        if: matrix.toolchain == 'nightly'
+        run: cargo bench --verbose bench
+
+      - name: miri
+        if: matrix.toolchain == 'nightly'
+        run: bash ./scripts/run_miri.sh
+
+      - name: fuzz
+        if: env.DO_FUZZ == '1'
+        working-directory: fuzz
+        run: ./travis_fuzz.sh
+
+  build_result:
+    name: homu build finished
+    runs-on: ubuntu-latest
+    needs:
+      - "linux-ci"
+
+    steps:
+      - name: Mark the job as successful
+        run: exit 0
+        if: success()
+      - name: Mark the job as unsuccessful
+        run: exit 1
+        if: "!success()"
+