skip timezone conversion on Windows

test/main.go

@@ -22,6 +22,7 @@ import (
 	"os"
 	"os/signal"
 	"path/filepath"
+	"runtime"
 	"syscall"
 	"time"
 
@@ -42,13 +43,23 @@ func main() {
 
 	log.Println("version =", version)
 
-	// Exercise timezone conversions, which demonstrates tzdata is provided
-	// by the base image.
-	now := time.Now()
-	loc, _ := time.LoadLocation("UTC")
-	fmt.Printf("UTC Time: %s\n", now.In(loc))
-	loc, _ = time.LoadLocation("America/New_York")
-	fmt.Printf("New York Time: %s\n", now.In(loc))
+	if runtime.GOOS == "windows" {
+		// Go seems to not load location data from Windows, so timezone
+		// conversion fails unless tzdata is embedded in the Go program
+		// with the go build tag `timetzdata`. Since we want to test
+		// loading tzdata provided by the base image below, we'll just
+		// skip that for Windows here.
+		// See https://github.com/google/ko/issues/739
+		log.Println("skipping timezone conversion on Windows")
+	} else {
+		// Exercise timezone conversions, which demonstrates tzdata is provided
+		// by the base image.
+		now := time.Now()
+		loc, _ := time.LoadLocation("UTC")
+		fmt.Printf("UTC Time: %s\n", now.In(loc))
+		loc, _ = time.LoadLocation("America/New_York")
+		fmt.Printf("New York Time: %s\n", now.In(loc))
+	}
 
 	dp := os.Getenv("KO_DATA_PATH")
 	file := filepath.Join(dp, *f)