ci: switch to GitHub Actions

.github/workflows/ci.yml

@@ -0,0 +1,87 @@
+name: ci
+on:
+  pull_request:
+  push:
+    branches:
+    - master
+  schedule:
+  - cron: '00 01 * * *'
+jobs:
+  test:
+    name: test
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        build:
+        - pinned
+        - pinned-win
+        - stable
+        - beta
+        - nightly
+        - macos
+        - win-msvc
+        - win-gnu
+        include:
+        - build: pinned
+          os: ubuntu-18.04
+          rust: 1.23.0
+        - build: pinned-win
+          os: windows-2019
+          rust: 1.23.0
+        - build: stable
+          os: ubuntu-18.04
+          rust: stable
+        - build: beta
+          os: ubuntu-18.04
+          rust: beta
+        - build: nightly
+          os: ubuntu-18.04
+          rust: nightly
+        - build: macos
+          os: macos-latest
+          rust: stable
+        - build: win-msvc
+          os: windows-2019
+          rust: stable
+        - build: win-gnu
+          os: windows-2019
+          rust: stable-x86_64-gnu
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v1
+      with:
+        fetch-depth: 1
+    - name: Install Rust
+      uses: hecrj/setup-rust-action@v1
+      with:
+        rust-version: ${{ matrix.rust }}
+    - run: cargo build --verbose
+    - run: cargo doc --verbose
+    - if: startsWith(matrix.build, 'pinned-') == false
+      run: cargo test --verbose
+    - if: matrix.build == 'nightly'
+      run: |
+        set -x
+        cargo generate-lockfile -Z minimal-versions
+        cargo build --verbose
+        cargo test --verbose
+
+        # TODO: Switch to rustfmt for walkdir 3. walkdir 3 is in a
+        # half-finished state, and applying rustfmt now would wreak havoc.
+        #  rustfmt:
+        #    name: rustfmt
+        #    runs-on: ubuntu-18.04
+        #    steps:
+        #    - name: Checkout repository
+        #      uses: actions/checkout@v1
+        #      with:
+        #        fetch-depth: 1
+        #    - name: Install Rust
+        #      uses: hecrj/setup-rust-action@v1
+        #      with:
+        #        rust-version: stable
+        #    - name: Install rustfmt
+        #      run: rustup component add rustfmt
+        #    - name: Check formatting
+        #      run: |
+        #        cargo fmt --all -- --check

README.md

@@ -5,8 +5,7 @@ Comes with support for following symbolic links, controlling the number of
 open file descriptors and efficient mechanisms for pruning the entries in the
 directory tree.
 
-[![Linux build status](https://api.travis-ci.org/BurntSushi/walkdir.svg)](https://travis-ci.org/BurntSushi/walkdir)
-[![Windows build status](https://ci.appveyor.com/api/projects/status/github/BurntSushi/walkdir?svg=true)](https://ci.appveyor.com/project/BurntSushi/walkdir)
+[![Build status](https://github.com/BurntSushi/walkdir/workflows/ci/badge.svg)](https://github.com/BurntSushi/walkdir/actions)
 [![](http://meritbadge.herokuapp.com/walkdir)](https://crates.io/crates/walkdir)
 
 Dual-licensed under MIT or the [UNLICENSE](http://unlicense.org).