Merge pull request #8106 from cpuguy83/1.6_loosen_windows_platform_ma…

…tching

[1.6] Add fallback for windows platforms without osversion

platforms/defaults_windows.go

@@ -46,10 +46,14 @@ type matchComparer struct {
 
 // Match matches platform with the same windows major, minor
 // and build version.
-func (m matchComparer) Match(p imagespec.Platform) bool {
-	if m.defaults.Match(p) {
-		// TODO(windows): Figure out whether OSVersion is deprecated.
-		return strings.HasPrefix(p.OSVersion, m.osVersionPrefix)
+func (m matchComparer) Match(p specs.Platform) bool {
+	match := m.defaults.Match(p)
+
+	if match && p.OS == "windows" {
+		if strings.HasPrefix(p.OSVersion, m.osVersionPrefix) {
+			return true
+		}
+		return p.OSVersion == ""
 	}
 	return false
 }

platforms/defaults_windows_test.go

@@ -104,7 +104,7 @@ func TestMatchComparerMatch(t *testing.T) {
 				Architecture: "amd64",
 				OS:           "windows",
 			},
-			match: false,
+			match: true,
 		},
 	} {
 		assert.Equal(t, test.match, m.Match(test.platform))
@@ -159,11 +159,11 @@ func TestMatchComparerLess(t *testing.T) {
 		{
 			Architecture: "amd64",
 			OS:           "windows",
-			OSVersion:    "10.0.17764.1",
 		},
 		{
 			Architecture: "amd64",
 			OS:           "windows",
+			OSVersion:    "10.0.17764.1",
 		},
 		{
 			Architecture: "amd64",

platforms/platforms_windows_test.go

@@ -19,9 +19,23 @@ package platforms
 import (
 	"testing"
 
+	specs "github.com/opencontainers/image-spec/specs-go/v1"
 	"github.com/stretchr/testify/require"
 )
 
 func TestNormalize(t *testing.T) {
 	require.Equal(t, DefaultSpec(), Normalize(DefaultSpec()))
 }
+
+func TestFallbackOnOSVersion(t *testing.T) {
+	p := specs.Platform{
+		OS:           "windows",
+		Architecture: "amd64",
+		OSVersion:    "99.99.99.99",
+	}
+
+	other := specs.Platform{OS: p.OS, Architecture: p.Architecture}
+
+	m := NewMatcher(p)
+	require.True(t, m.Match(other))
+}