prevent deprecated & removed from being generated for GA types

staging/src/k8s.io/code-generator/cmd/prerelease-lifecycle-gen/prerelease-lifecycle-generators/status.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"io"
 	"path"
+	"regexp"
 	"strconv"
 	"strings"
 
@@ -364,6 +365,10 @@ func (g *genPreleaseLifecycle) Imports(c *generator.Context) (imports []string)
 	return importLines
 }
 
+var (
+	isGAVersionRegex = regexp.MustCompile(`^v\d+$`)
+)
+
 func (g *genPreleaseLifecycle) argsFromType(c *generator.Context, t *types.Type) (generator.Args, error) {
 	a := generator.Args{
 		"type": t,
@@ -372,37 +377,53 @@ func (g *genPreleaseLifecycle) argsFromType(c *generator.Context, t *types.Type)
 	if err != nil {
 		return nil, err
 	}
+
+	// Take version from package last segment.
+	// Use heuristic to determine whether the package is GA or prerelease.
+	// If the package is GA, the version matches the format vN where N is a number.
+	version := path.Base(t.Name.Package)
+	isGAVersion := isGAVersionRegex.MatchString(version)
+
 	a = a.
 		With("introducedMajor", introducedMajor).
 		With("introducedMinor", introducedMinor)
 
 	// compute based on our policy
+	hasDeprecated := tagExists(deprecatedTagName, t)
+	hasRemoved := tagExists(removedTagName, t)
+
 	deprecatedMajor := introducedMajor
 	deprecatedMinor := introducedMinor + 3
 	// if someone intentionally override the deprecation release
-	if tagExists(deprecatedTagName, t) {
+	if hasDeprecated {
 		_, deprecatedMajor, deprecatedMinor, err = extractDeprecatedTag(t)
 		if err != nil {
 			return nil, err
 		}
 	}
-	a = a.
+
-		With("deprecatedMajor", deprecatedMajor).
+	if !isGAVersion || hasDeprecated {
-		With("deprecatedMinor", deprecatedMinor)
+		a = a.
+			With("deprecatedMajor", deprecatedMajor).
+			With("deprecatedMinor", deprecatedMinor)
+	}
 
 	// compute based on our policy
 	removedMajor := deprecatedMajor
 	removedMinor := deprecatedMinor + 3
 	// if someone intentionally override the removed release
-	if tagExists(removedTagName, t) {
+	if hasRemoved {
 		_, removedMajor, removedMinor, err = extractRemovedTag(t)
 		if err != nil {
 			return nil, err
 		}
 	}
-	a = a.
+
-		With("removedMajor", removedMajor).
+	if !isGAVersion || hasRemoved {
-		With("removedMinor", removedMinor)
+		a = a.
+			With("removedMajor", removedMajor).
+			With("removedMinor", removedMinor)
+	}
 
 	replacementGroup, replacementVersion, replacementKind, hasReplacement, err := extractReplacementTag(t)
 	if err != nil {
@@ -441,13 +462,17 @@ func (g *genPreleaseLifecycle) GenerateType(c *generator.Context, t *types.Type,
 		sw.Do("    return $.introducedMajor$, $.introducedMinor$\n", args)
 		sw.Do("}\n\n", nil)
 	}
-	if versionedMethodOrDie("APILifecycleDeprecated", t) == nil {
+
-		sw.Do("// APILifecycleDeprecated is an autogenerated function, returning the release in which the API struct was or will be deprecated as int versions of major and minor for comparison.\n", args)
+	if _, hasDeprecated := args["deprecatedMajor"]; hasDeprecated {
-		sw.Do("// It is controlled by \""+deprecatedTagName+"\" tags in types.go or  \""+introducedTagName+"\" plus three minor.\n", args)
+		if versionedMethodOrDie("APILifecycleDeprecated", t) == nil {
-		sw.Do("func (in *$.type|intrapackage$) APILifecycleDeprecated() (major, minor int) {\n", args)
+			sw.Do("// APILifecycleDeprecated is an autogenerated function, returning the release in which the API struct was or will be deprecated as int versions of major and minor for comparison.\n", args)
-		sw.Do("    return $.deprecatedMajor$, $.deprecatedMinor$\n", args)
+			sw.Do("// It is controlled by \""+deprecatedTagName+"\" tags in types.go or  \""+introducedTagName+"\" plus three minor.\n", args)
-		sw.Do("}\n\n", nil)
+			sw.Do("func (in *$.type|intrapackage$) APILifecycleDeprecated() (major, minor int) {\n", args)
+			sw.Do("    return $.deprecatedMajor$, $.deprecatedMinor$\n", args)
+			sw.Do("}\n\n", nil)
+		}
 	}
+
 	if _, hasReplacement := args["replacementKind"]; hasReplacement {
 		if versionedMethodOrDie("APILifecycleReplacement", t) == nil {
 			sw.Do("// APILifecycleReplacement is an autogenerated function, returning the group, version, and kind that should be used instead of this deprecated type.\n", args)
@@ -457,12 +482,15 @@ func (g *genPreleaseLifecycle) GenerateType(c *generator.Context, t *types.Type,
 			sw.Do("}\n\n", nil)
 		}
 	}
-	if versionedMethodOrDie("APILifecycleRemoved", t) == nil {
+
-		sw.Do("// APILifecycleRemoved is an autogenerated function, returning the release in which the API is no longer served as int versions of major and minor for comparison.\n", args)
+	if _, hasRemoved := args["removedMajor"]; hasRemoved {
-		sw.Do("// It is controlled by \""+removedTagName+"\" tags in types.go or  \""+deprecatedTagName+"\" plus three minor.\n", args)
+		if versionedMethodOrDie("APILifecycleRemoved", t) == nil {
-		sw.Do("func (in *$.type|intrapackage$) APILifecycleRemoved() (major, minor int) {\n", args)
+			sw.Do("// APILifecycleRemoved is an autogenerated function, returning the release in which the API is no longer served as int versions of major and minor for comparison.\n", args)
-		sw.Do("    return $.removedMajor$, $.removedMinor$\n", args)
+			sw.Do("// It is controlled by \""+removedTagName+"\" tags in types.go or  \""+deprecatedTagName+"\" plus three minor.\n", args)
-		sw.Do("}\n\n", nil)
+			sw.Do("func (in *$.type|intrapackage$) APILifecycleRemoved() (major, minor int) {\n", args)
+			sw.Do("    return $.removedMajor$, $.removedMinor$\n", args)
+			sw.Do("}\n\n", nil)
+		}
 	}
 
 	return sw.Error()

staging/src/k8s.io/code-generator/cmd/prerelease-lifecycle-gen/prerelease-lifecycle-generators/status_test.go

@@ -20,8 +20,11 @@ import (
 	"fmt"
 	"reflect"
 	"strconv"
+	"strings"
 	"testing"
 
+	"github.com/google/go-cmp/cmp"
+	"k8s.io/gengo/v2/generator"
 	"k8s.io/gengo/v2/types"
 	"k8s.io/klog/v2"
 )
@@ -34,6 +37,248 @@ var mockType = &types.Type{
 	SecondClosestCommentLines: []string{},
 }
 
+func TestArgsFromType(t *testing.T) {
+	type testcase struct {
+		name          string
+		t             *types.Type
+		expected      generator.Args
+		expectedError string
+	}
+
+	tests := []testcase{
+		{
+			name: "no comments",
+			t: &types.Type{
+				Name: types.Name{
+					Name:    "Simple",
+					Package: "k8s.io/apis/core/v1",
+				},
+			},
+			expectedError: `missing`,
+		},
+		{
+			name: "GA type",
+			t: &types.Type{
+				Name: types.Name{
+					Name:    "Simple",
+					Package: "k8s.io/apis/core/v1",
+				},
+				CommentLines: []string{
+					"+k8s:prerelease-lifecycle-gen:introduced=1.5",
+				},
+			},
+			expected: generator.Args{
+				"introducedMajor": 1,
+				"introducedMinor": 5,
+			},
+		},
+		{
+			name: "GA type v2",
+			t: &types.Type{
+				Name: types.Name{
+					Name:    "Simple",
+					Package: "k8s.io/apis/core/v2",
+				},
+				CommentLines: []string{
+					"+k8s:prerelease-lifecycle-gen:introduced=1.5",
+				},
+			},
+			expected: generator.Args{
+				"introducedMajor": 1,
+				"introducedMinor": 5,
+			},
+		},
+		{
+			name: "GA type - explicit deprecated",
+			t: &types.Type{
+				Name: types.Name{
+					Name:    "Simple",
+					Package: "k8s.io/apis/core/v1",
+				},
+				CommentLines: []string{
+					"+k8s:prerelease-lifecycle-gen:introduced=1.5",
+					"+k8s:prerelease-lifecycle-gen:deprecated=1.7",
+				},
+			},
+			expected: generator.Args{
+				"introducedMajor": 1,
+				"introducedMinor": 5,
+				"deprecatedMajor": 1,
+				"deprecatedMinor": 7,
+			},
+		},
+		{
+			name: "GA type - explicit removed",
+			t: &types.Type{
+				Name: types.Name{
+					Name:    "Simple",
+					Package: "k8s.io/apis/core/v1",
+				},
+				CommentLines: []string{
+					"+k8s:prerelease-lifecycle-gen:introduced=1.5",
+					"+k8s:prerelease-lifecycle-gen:removed=1.9",
+				},
+			},
+			expected: generator.Args{
+				"introducedMajor": 1,
+				"introducedMinor": 5,
+				"removedMajor":    1,
+				"removedMinor":    9,
+			},
+		},
+		{
+			name: "GA type - explicit",
+			t: &types.Type{
+				Name: types.Name{
+					Name:    "Simple",
+					Package: "k8s.io/apis/core/v1",
+				},
+				CommentLines: []string{
+					"+k8s:prerelease-lifecycle-gen:introduced=1.5",
+					"+k8s:prerelease-lifecycle-gen:deprecated=1.7",
+					"+k8s:prerelease-lifecycle-gen:removed=1.9",
+				},
+			},
+			expected: generator.Args{
+				"introducedMajor": 1,
+				"introducedMinor": 5,
+				"deprecatedMajor": 1,
+				"deprecatedMinor": 7,
+				"removedMajor":    1,
+				"removedMinor":    9,
+			},
+		},
+		{
+			name: "beta type - defaulted",
+			t: &types.Type{
+				Name: types.Name{
+					Name:    "Simple",
+					Package: "k8s.io/apis/core/v1beta1",
+				},
+				CommentLines: []string{
+					"+k8s:prerelease-lifecycle-gen:introduced=1.5",
+				},
+			},
+			expected: generator.Args{
+				"introducedMajor": 1,
+				"introducedMinor": 5,
+				"deprecatedMajor": 1,
+				"deprecatedMinor": 8,
+				"removedMajor":    1,
+				"removedMinor":    11,
+			},
+		},
+		{
+			name: "beta type - explicit",
+			t: &types.Type{
+				Name: types.Name{
+					Name:    "Simple",
+					Package: "k8s.io/apis/core/v1beta1",
+				},
+				CommentLines: []string{
+					"+k8s:prerelease-lifecycle-gen:introduced=1.5",
+					"+k8s:prerelease-lifecycle-gen:deprecated=1.7",
+					"+k8s:prerelease-lifecycle-gen:removed=1.9",
+				},
+			},
+			expected: generator.Args{
+				"introducedMajor": 1,
+				"introducedMinor": 5,
+				"deprecatedMajor": 1,
+				"deprecatedMinor": 7,
+				"removedMajor":    1,
+				"removedMinor":    9,
+			},
+		},
+		{
+			name: "beta type - explicit deprecated only",
+			t: &types.Type{
+				Name: types.Name{
+					Name:    "Simple",
+					Package: "k8s.io/apis/core/v1beta1",
+				},
+				CommentLines: []string{
+					"+k8s:prerelease-lifecycle-gen:introduced=1.5",
+					"+k8s:prerelease-lifecycle-gen:deprecated=1.7",
+				},
+			},
+			expected: generator.Args{
+				"introducedMajor": 1,
+				"introducedMinor": 5,
+				"deprecatedMajor": 1,
+				"deprecatedMinor": 7,
+				"removedMajor":    1,
+				"removedMinor":    10,
+			},
+		},
+		{
+			name: "beta type - explicit removed only",
+			t: &types.Type{
+				Name: types.Name{
+					Name:    "Simple",
+					Package: "k8s.io/apis/core/v1beta1",
+				},
+				CommentLines: []string{
+					"+k8s:prerelease-lifecycle-gen:introduced=1.5",
+					"+k8s:prerelease-lifecycle-gen:removed=1.9",
+				},
+			},
+			expected: generator.Args{
+				"introducedMajor": 1,
+				"introducedMinor": 5,
+				"deprecatedMajor": 1,
+				"deprecatedMinor": 8,
+				"removedMajor":    1,
+				"removedMinor":    9,
+			},
+		},
+		{
+			name: "alpha type - defaulted",
+			t: &types.Type{
+				Name: types.Name{
+					Name:    "Simple",
+					Package: "k8s.io/apis/core/v1alpha1",
+				},
+				CommentLines: []string{
+					"+k8s:prerelease-lifecycle-gen:introduced=1.5",
+				},
+			},
+			expected: generator.Args{
+				"introducedMajor": 1,
+				"introducedMinor": 5,
+				"deprecatedMajor": 1,
+				"deprecatedMinor": 8,
+				"removedMajor":    1,
+				"removedMinor":    11,
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			if test.expected != nil {
+				test.expected["type"] = test.t
+			}
+			gen := genPreleaseLifecycle{}
+			args, err := gen.argsFromType(nil, test.t)
+			if test.expectedError != "" {
+				if err == nil {
+					t.Errorf("expected error, got none")
+				} else if !strings.Contains(err.Error(), test.expectedError) {
+					t.Errorf("expected error %q, got %q", test.expectedError, err.Error())
+				}
+				return
+			}
+			if err != nil {
+				t.Errorf("unexpected error: %v", err)
+			}
+			if diff := cmp.Diff(test.expected, args); diff != "" {
+				t.Error(diff)
+			}
+		})
+	}
+}
+
 func Test_extractKubeVersionTag(t *testing.T) {
 	oldKlogOsExit := klog.OsExit
 	defer func() {