Bump cel string lib to v2, add tests

staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver/schema/cel/validation_test.go

@@ -259,13 +259,15 @@ func TestValidationExpressions(t *testing.T) {
 				"self.val1.substring(4, 10).trim() == 'takes'",
 				"self.val1.upperAscii() == 'ROOK TAKES 👑'",
 				"self.val1.lowerAscii() == 'rook takes 👑'",
+
+				"'%d %s %f %s %s'.format([1, 'abc', 1.0, duration('1m'), timestamp('2000-01-01T00:00:00.000Z')]) == '1 abc 1.000000 60s 2000-01-01T00:00:00Z'",
+				"'%e'.format([3.14]) == '3.140000 × 10⁰⁰'",
+				"'%o %o %o'.format([7, 8, 9]) == '7 10 11'",
+				"'%b %b %b'.format([7, 8, 9]) == '111 1000 1001'",
 			},
 			errors: map[string]string{
 				// Invalid regex with a string constant regex pattern is compile time error
 				"self.val1.matches(')')": "compile error: program instantiation failed: error parsing regexp: unexpected ): `)`",
-				// strings version 0 does not have format or join
-				// TODO: Replace this error test with valid tests when the string version is bumped.
-				"'%s %i'.format('a', 1) == 'a 1'": "undeclared reference to 'format'",
 			},
 		},
 		{name: "escaped strings",

staging/src/k8s.io/apiserver/pkg/cel/environment/base.go

@@ -41,7 +41,7 @@ import (
 // desirable because it means that CEL expressions are portable across a wider range
 // of Kubernetes versions.
 func DefaultCompatibilityVersion() *version.Version {
-	return version.MajorMinor(1, 27)
+	return version.MajorMinor(1, 28)
 }
 
 var baseOpts = []VersionedOptions{
@@ -57,7 +57,6 @@ var baseOpts = []VersionedOptions{
 			cel.EagerlyValidateDeclarations(true),
 			cel.DefaultUTCTimeZone(true),
 
-			ext.Strings(ext.StringsVersion(0)),
 			library.URLs(),
 			library.Regex(),
 			library.Lists(),
@@ -67,6 +66,13 @@ var baseOpts = []VersionedOptions{
 			cel.CostLimit(celconfig.PerCallLimit),
 		},
 	},
+	{
+		IntroducedVersion: version.MajorMinor(1, 0),
+		RemovedVersion:    version.MajorMinor(1, 29),
+		EnvOptions: []cel.EnvOption{
+			ext.Strings(ext.StringsVersion(0)),
+		},
+	},
 	{
 		IntroducedVersion: version.MajorMinor(1, 27),
 		EnvOptions: []cel.EnvOption{
@@ -81,7 +87,12 @@ var baseOpts = []VersionedOptions{
 			library.Quantity(),
 		},
 	},
-	// TODO: switch to ext.Strings version 2 once format() is fixed to work with HomogeneousAggregateLiterals.
+	{
+		IntroducedVersion: version.MajorMinor(1, 29),
+		EnvOptions: []cel.EnvOption{
+			ext.Strings(ext.StringsVersion(2)),
+		},
+	},
 }
 
 // MustBaseEnvSet returns the common CEL base environments for Kubernetes for Version, or panics

staging/src/k8s.io/apiserver/pkg/cel/lazy/lazy.go

@@ -35,7 +35,7 @@ var _ traits.Mapper = (*MapValue)(nil)
 // MapValue is a map that lazily evaluate its value when a field is first accessed.
 // The map value is not designed to be thread-safe.
 type MapValue struct {
-	typeValue *types.TypeValue
+	typeValue *types.Type
 
 	// values are previously evaluated values obtained from callbacks
 	values map[string]ref.Val

staging/src/k8s.io/apiserver/pkg/cel/library/cost.go

@@ -102,7 +102,7 @@ func (l *CostEstimator) EstimateCallCost(function, overloadId string, target *ch
 			// of estimating the additional comparison cost.
 			if elNode := l.listElementNode(*target); elNode != nil {
 				k := elNode.Type().Kind()
-				if k == types.StructKind || k == types.BytesKind {
+				if k == types.StringKind || k == types.BytesKind {
 					sz := l.sizeEstimate(elNode)
 					elCost = elCost.Add(sz.MultiplyByCostFactor(common.StringTraversalCostFactor))
 				}

staging/src/k8s.io/apiserver/pkg/cel/library/cost_test.go

@@ -24,7 +24,7 @@ import (
 	"github.com/google/cel-go/cel"
 	"github.com/google/cel-go/checker"
 	"github.com/google/cel-go/ext"
-	expr "google.golang.org/genproto/googleapis/api/expr/v1alpha1"
+	exprpb "google.golang.org/genproto/googleapis/api/expr/v1alpha1"
 
 	"k8s.io/apiserver/pkg/authorization/authorizer"
 )
@@ -411,7 +411,7 @@ func TestAuthzLibrary(t *testing.T) {
 func testCost(t *testing.T, expr string, expectEsimatedCost checker.CostEstimate, expectRuntimeCost uint64) {
 	est := &CostEstimator{SizeEstimator: &testCostEstimator{}}
 	env, err := cel.NewEnv(
-		ext.Strings(),
+		ext.Strings(ext.StringsVersion(2)),
 		URLs(),
 		Regex(),
 		Lists(),
@@ -554,14 +554,15 @@ type testCostEstimator struct {
 }
 
 func (t *testCostEstimator) EstimateSize(element checker.AstNode) *checker.SizeEstimate {
-	switch t := element.Type().TypeKind.(type) {
-	case *expr.Type_Primitive:
-		switch t.Primitive {
-		case expr.Type_STRING:
-			return &checker.SizeEstimate{Min: 0, Max: 12}
-		case expr.Type_BYTES:
-			return &checker.SizeEstimate{Min: 0, Max: 12}
-		}
+	expr, err := cel.TypeToExprType(element.Type())
+	if err != nil {
+		return nil
+	}
+	switch expr.GetPrimitive() {
+	case exprpb.Type_STRING:
+		return &checker.SizeEstimate{Min: 0, Max: 12}
+	case exprpb.Type_BYTES:
+		return &checker.SizeEstimate{Min: 0, Max: 12}
 	}
 	return nil
 }

staging/src/k8s.io/apiserver/pkg/cel/library/quantity_test.go

@@ -21,11 +21,11 @@ import (
 	"testing"
 
 	"github.com/google/cel-go/cel"
-	"github.com/google/cel-go/common"
 	"github.com/google/cel-go/common/types"
 	"github.com/google/cel-go/common/types/ref"
 	"github.com/google/cel-go/ext"
 	"github.com/stretchr/testify/require"
+
 	"k8s.io/apimachinery/pkg/api/resource"
 	"k8s.io/apimachinery/pkg/util/sets"
 	apiservercel "k8s.io/apiserver/pkg/cel"
@@ -66,10 +66,10 @@ func testQuantity(t *testing.T, expr string, expectResult ref.Val, expectRuntime
 			if !didMatch {
 				missingCompileErrs = append(missingCompileErrs, expectedCompileErr)
 			} else if len(matchedCompileErrs) != len(issues.Errors()) {
-				unmatchedErrs := []common.Error{}
+				unmatchedErrs := []cel.Error{}
 				for i, issue := range issues.Errors() {
 					if !matchedCompileErrs.Has(i) {
-						unmatchedErrs = append(unmatchedErrs, issue)
+						unmatchedErrs = append(unmatchedErrs, *issue)
 					}
 				}
 				require.Empty(t, unmatchedErrs, "unexpected compilation errors")