Migrate from Travis CI to GitHub Actions

.gitattributes

@@ -0,0 +1,2 @@
+# gofmt always uses LF, whereas Git uses CRLF on Windows.
+*.go text eol=lf

.github/workflows/ci.yaml

@@ -0,0 +1,48 @@
+name: Go
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        # No Windows this time. Some tests expect Unix-style paths.
+        os: [ ubuntu-latest, macos-latest ]
+      fail-fast: false
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Set up Go
+      uses: actions/setup-go@v2
+      with:
+        # Due to https://github.com/go-openapi/swag/issues/59
+        go-version: 1.16
+
+    - name: Setup gotestsum
+      uses: autero1/action-gotestsum@v1.0.0
+      with:
+        gotestsum_version: 1.7.0
+
+    - name: Test
+      run: gotestsum --format short-verbose -- -race -timeout=20m -coverprofile=coverage_txt -covermode=atomic ./...
+
+    - uses: codecov/codecov-action@v2
+      with:
+        files: coverage_txt
+
+  lint:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, macos-latest, windows-latest ]
+      fail-fast: false
+
+    steps:
+    - uses: actions/checkout@v2
+    - uses: golangci/golangci-lint-action@v2
+      with:
+        args: --timeout=5m

.golangci.yml

@@ -39,3 +39,12 @@ linters:
     - paralleltest
     - thelper
     - ifshort
+    - gomoddirectives
+    - cyclop
+    - forcetypeassert
+    - ireturn
+    - tagliatelle
+    - varnamelen
+    - goimports
+    - tenv
+    - golint

post_go18.go

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build go1.8
 // +build go1.8
 
 package swag

post_go19.go

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build go1.9
 // +build go1.9
 
 package swag

pre_go18.go

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build !go1.8
 // +build !go1.8
 
 package swag

pre_go19.go

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build !go1.9
 // +build !go1.9
 
 package swag