all: switch to GitHub actions

Travis-CI is dead. The new hotness if GitHub actions.
For now we only test on Linux since testing on macOS and Windows
takes more effort to figure out.

Change-Id: I464df75b9142dafcdf07281f70c1bcf52514f71a
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/298089
Trust: Joe Tsai <joetsai@digital-static.net>
Reviewed-by: Damien Neil <dneil@google.com>

.github/workflows/test.yml

@@ -0,0 +1,26 @@
+on: [push]
+name: Test
+jobs:
+  test:
+    strategy:
+      matrix:
+        go-version: [1.16.x]
+        os: [ubuntu-latest] # TODO: Add [macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Install Linux dependencies
+      if: runner.os == 'Linux'
+      run: sudo apt-get -y install autoconf automake libtool curl make g++ unzip
+    - name: Install Go
+      uses: actions/setup-go@v2
+      with:
+        go-version: ${{ matrix.go-version }}
+    - name: Checkout code
+      uses: actions/checkout@v2
+    - name: Cache dependencies
+      uses: actions/cache@v2
+      with:
+        path: .cache
+        key: ${{ runner.os }}-${{ hashFiles('integration_test.go') }}
+    - name: Test
+      run: go test -v -mod=vendor -timeout=60m -count=1 integration_test.go -failfast

.travis.yml

@@ -1,16 +0,0 @@
-language: go
-go: 1.12.x
-install:
-  - unset GOROOT
-  - unset GOPATH
-matrix:
-  include:
-    - os: linux
-      dist: xenial
-    - os: osx
-      osx_image: xcode10.1
-script:
-  - ./test.bash
-cache:
-  directories:
-    - .cache

integration_test.go

@@ -180,25 +180,6 @@ func mustInitDeps(t *testing.T) {
 	testDir := filepath.Join(repoRoot, ".cache")
 	check(os.MkdirAll(testDir, 0775))
 
-	// Travis-CI has a hard-coded timeout where it kills the test after
-	// 10 minutes of a lack of activity on stdout.
-	// We work around this restriction by periodically printing the timestamp.
-	ticker := time.NewTicker(5 * time.Minute)
-	done := make(chan struct{})
-	go func() {
-		now := time.Now()
-		for {
-			select {
-			case t := <-ticker.C:
-				fmt.Printf("\tt=%0.fmin\n", t.Sub(now).Minutes())
-			case <-done:
-				return
-			}
-		}
-	}()
-	defer close(done)
-	defer ticker.Stop()
-
 	// Delete the current directory if non-empty,
 	// which only occurs if a dependency failed to initialize properly.
 	var workingDir string
@@ -295,7 +276,7 @@ func mustInitDeps(t *testing.T) {
 	registerBinary("staticcheck", filepath.Join(checkDir, "staticcheck"))
 	finishWork()
 
-	// Travis-CI sets GOROOT, which confuses invocations of the Go toolchain.
+	// GitHub actions sets GOROOT, which confuses invocations of the Go toolchain.
 	// Explicitly clear GOROOT, so each toolchain uses their default GOROOT.
 	check(os.Unsetenv("GOROOT"))