darwin tests: Exchangedata is deprecated on 10.13

.travis.yml

@@ -6,7 +6,6 @@ go:
   - "1.10.4"
   - "1.9.x"
   - "1.8.x"
-  - tip
 
 matrix:
   allow_failures:
@@ -17,7 +16,7 @@ before_script:
   - go get -u golang.org/x/lint/golint
 
 script:
-  - go test -v --race ./...
+  - go test --race ./...
 
 after_script:
   - test -z "$(gofmt -s -l -w . | tee /dev/stderr)"

integration_darwin_test.go

@@ -7,19 +7,39 @@ package fsnotify
 import (
 	"os"
 	"path/filepath"
+	"strconv"
+	"strings"
 	"testing"
 	"time"
 
 	"golang.org/x/sys/unix"
 )
 
+// darwinVersion returns version os Darwin (17 is macOS 10.13).
+func darwinVersion() (int, error) {
+	s, err := unix.Sysctl("kern.osrelease")
+	if err != nil {
+		return 0, err
+	}
+	s = strings.Split(s, ".")[0]
+	return strconv.Atoi(s)
+}
+
 // testExchangedataForWatcher tests the watcher with the exchangedata operation on macOS.
 //
 // This is widely used for atomic saves on macOS, e.g. TextMate and in Apple's NSDocument.
 //
 // See https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man2/exchangedata.2.html
 // Also see: https://github.com/textmate/textmate/blob/cd016be29489eba5f3c09b7b70b06da134dda550/Frameworks/io/src/swap_file_data.cc#L20
 func testExchangedataForWatcher(t *testing.T, watchDir bool) {
+	osVersion, err := darwinVersion()
+	if err != nil {
+		t.Fatal("unable to get Darwin version:", err)
+	}
+	if osVersion >= 17 {
+		t.Skip("Exchangedata is deprecated in macOS 10.13")
+	}
+
 	// Create directory to watch
 	testDir1 := tempMkdir(t)