camtool sync: local path support on Windows

Change-Id: I2d3e0c0bbd3f3ae50165d366e6a1093fceb36e5c

cmd/camtool/sync.go

@@ -22,6 +22,7 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"path/filepath"
 	"strconv"
 	"strings"
 	"time"
@@ -206,8 +207,8 @@ func (c *syncCmd) storageFromParam(which storageType, val string) (blobserver.St
 }
 
 func looksLikePath(v string) bool {
-	prefix := func(s string) bool { return strings.HasPrefix(v, s) }
-	return prefix("./") || prefix("/") || prefix("../")
+	prefix := func(s string) bool { return strings.HasPrefix(filepath.ToSlash(v), s) }
+	return prefix("./") || prefix("/") || prefix("../") || filepath.VolumeName(v) != ""
 }
 
 type SyncStats struct {

cmd/camtool/sync_test.go

@@ -17,14 +17,16 @@ limitations under the License.
 package main
 
 import (
+	"runtime"
 	"testing"
 )
 
 func TestLooksLikePath(t *testing.T) {
-	tests := []struct {
+	type pathTest struct {
 		v    string
 		want bool
-	}{
+	}
+	tests := []pathTest{
 		{"foo.com", false},
 		{"127.0.0.1:234", false},
 		{"foo", false},
@@ -33,6 +35,17 @@ func TestLooksLikePath(t *testing.T) {
 		{"./foo", true},
 		{"../foo", true},
 	}
+	if runtime.GOOS == "windows" {
+		tests = append(tests,
+			pathTest{`\foo`, true},
+			pathTest{`.\foo`, true},
+			pathTest{`..\foo`, true},
+			pathTest{`C:/dir`, true},
+			pathTest{`C:\dir`, true},
+			pathTest{`//server/share/dir`, true},
+			pathTest{`\\server\share\dir`, true},
+		)
+	}
 	for _, tt := range tests {
 		got := looksLikePath(tt.v)
 		if got != tt.want {