Add generate bundle --ignore-if-only-createdAt option

Signed-off-by: Tiger Kaovilai <tkaovila@redhat.com>

changelog/fragments/6419.yaml

@@ -0,0 +1,38 @@
+# entries is a list of entries to include in
+# release notes and/or the migration guide
+entries:
+  - description: >
+      Add ability to ignore bundle updates on `generate bundle` command if createdAt timestamp is the only change.
+      The flag to use is `--ignore-if-only-createdAt`.
+
+    # kind is one of:
+    # - addition
+    # - change
+    # - deprecation
+    # - removal
+    # - bugfix
+    kind: "addition"
+
+    # Is this a breaking change?
+    breaking: false
+
+    # NOTE: ONLY USE `pull_request_override` WHEN ADDING THIS
+    # FILE FOR A PREVIOUSLY MERGED PULL_REQUEST!
+    #
+    # The generator auto-detects the PR number from the commit
+    # message in which this file was originally added.
+    #
+    # What is the pull request number (without the "#")?
+    # pull_request_override: 0
+
+
+    # Migration can be defined to automatically add a section to
+    # the migration guide. This is required for breaking changes.
+    # migration:
+    #   header: Header text for the migration section
+    #   body: |
+    #     Body of the migration section. This should be formatted as markdown and can
+    #     span multiple lines.
+
+    #     Using the YAML string '|' operator means that newlines in this string will
+    #     be honored and interpretted as newlines in the rendered markdown.

internal/cmd/operator-sdk/generate/bundle/bundle.go

@@ -201,6 +201,10 @@ func (c bundleCmd) runManifests() (err error) {
 		opts = append(opts, gencsv.WithWriter(stdout))
 	} else {
 		opts = append(opts, gencsv.WithBundleWriter(c.outputDir))
+		if c.ignoreIfOnlyCreatedAt && genutil.IsExist(c.outputDir) {
+			opts = append(opts, gencsv.WithBundleReader(c.outputDir))
+			opts = append(opts, gencsv.WithIgnoreIfOnlyCreatedAt())
+		}
 	}
 
 	csvGen := gencsv.Generator{

internal/cmd/operator-sdk/generate/bundle/cmd.go

@@ -42,9 +42,10 @@ type bundleCmd struct {
 	extraServiceAccounts []string
 
 	// Metadata options.
-	channels       string
-	defaultChannel string
-	overwrite      bool
+	channels              string
+	defaultChannel        string
+	overwrite             bool
+	ignoreIfOnlyCreatedAt bool
 
 	// These are set if a PROJECT config is not present.
 	layout      string
@@ -138,6 +139,7 @@ func (c *bundleCmd) addFlagsTo(fs *pflag.FlagSet) {
 		"Names of service accounts, outside of the operator's Deployment account, "+
 			"that have bindings to {Cluster}Roles that should be added to the CSV")
 	fs.BoolVar(&c.overwrite, "overwrite", true, "Overwrite the bundle's metadata and Dockerfile if they exist")
+	fs.BoolVar(&c.ignoreIfOnlyCreatedAt, "ignore-if-only-createdAt", false, "Ignore if only createdAt is changed")
 	fs.BoolVarP(&c.quiet, "quiet", "q", false, "Run in quiet mode")
 	fs.BoolVar(&c.stdout, "stdout", false, "Write bundle manifest to stdout")
 

internal/generate/clusterserviceversion/clusterserviceversion.go

@@ -18,6 +18,7 @@ import (
 	"fmt"
 	"io"
 	"path/filepath"
+	"reflect"
 	"strings"
 
 	"github.com/blang/semver/v4"
@@ -61,6 +62,10 @@ type Generator struct {
 
 	// Func that returns the writer the generated CSV's bytes are written to.
 	getWriter func() (io.Writer, error)
+	// Func that returns the reader the previous CSV's bytes are read from.
+	getReader func() (io.Reader, error)
+
+	ignoreIfOnlyCreatedAt bool
 }
 
 // Option is a function that modifies a Generator.
@@ -88,6 +93,18 @@ func WithBundleWriter(dir string) Option {
 	}
 }
 
+// WithBundleGetter sets a Generator's getter to a bundle CSV file under
+// <dir>/manifests.
+func WithBundleReader(dir string) Option {
+	return func(g *Generator) error {
+		fileName := makeCSVFileName(g.OperatorName)
+		g.getReader = func() (io.Reader, error) {
+			return genutil.Open(filepath.Join(dir, bundle.ManifestsDir), fileName)
+		}
+		return nil
+	}
+}
+
 // WithPackageWriter sets a Generator's writer to a package CSV file under
 // <dir>/<version>.
 func WithPackageWriter(dir string) Option {
@@ -100,6 +117,13 @@ func WithPackageWriter(dir string) Option {
 	}
 }
 
+func WithIgnoreIfOnlyCreatedAt() Option {
+	return func(g *Generator) error {
+		g.ignoreIfOnlyCreatedAt = true
+		return nil
+	}
+}
+
 // Generate configures the generator with col and opts then runs it.
 func (g *Generator) Generate(opts ...Option) (err error) {
 	for _, opt := range opts {
@@ -119,7 +143,30 @@ func (g *Generator) Generate(opts ...Option) (err error) {
 
 	// Add extra annotations to csv
 	g.setAnnotations(csv)
-
+	// If a reader is set, and there is a flag to not update createdAt, then
+	// set the CSV's createdAt to the previous CSV's createdAt if its the only change.
+	if g.ignoreIfOnlyCreatedAt && g.getReader != nil {
+		r, err := g.getReader()
+		if err != nil {
+			return err
+		}
+		var prevCSV operatorsv1alpha1.ClusterServiceVersion
+		err = genutil.ReadObject(r, &prevCSV)
+		if err != nil {
+			return err
+		}
+		if prevCSV.ObjectMeta.Annotations["createdAt"] != "" {
+			csvWithoutCreatedAtChange := csv.DeepCopy()
+			// Set WebhookDefinitions if not nil to avoid diffing on it
+			if prevCSV.Spec.WebhookDefinitions == nil {
+				prevCSV.Spec.WebhookDefinitions = []operatorsv1alpha1.WebhookDescription{}
+			}
+			csvWithoutCreatedAtChange.ObjectMeta.Annotations["createdAt"] = prevCSV.ObjectMeta.Annotations["createdAt"]
+			if reflect.DeepEqual(csvWithoutCreatedAtChange, &prevCSV) {
+				csv = csvWithoutCreatedAtChange
+			}
+		}
+	}
 	w, err := g.getWriter()
 	if err != nil {
 		return err

internal/generate/internal/genutil.go

@@ -22,6 +22,7 @@ import (
 	"os"
 	"path/filepath"
 
+	"sigs.k8s.io/controller-runtime/pkg/client"
 	"sigs.k8s.io/yaml"
 
 	"github.com/operator-framework/operator-sdk/internal/util/k8sutil"
@@ -111,3 +112,12 @@ func IsNotExist(path string) bool {
 	_, err := os.Stat(path)
 	return err != nil && errors.Is(err, os.ErrNotExist)
 }
+
+func ReadObject(r io.Reader, obj client.Object) error {
+	var buf bytes.Buffer
+	if _, err := buf.ReadFrom(r); err != nil {
+		return err
+	}
+	k8sutil.GetObjectFromBytes(buf.Bytes(), obj)
+	return nil
+}

internal/util/k8sutil/object.go

@@ -16,6 +16,7 @@ package k8sutil
 
 import (
 	"k8s.io/apimachinery/pkg/runtime"
+	"sigs.k8s.io/yaml"
 )
 
 type MarshalFunc func(interface{}) ([]byte, error)
@@ -53,3 +54,11 @@ func deleteKeyFromUnstructured(u map[string]interface{}, key string) {
 		}
 	}
 }
+
+func GetObjectFromBytes(b []byte, obj interface{}) (interface{}, error) {
+	var u map[string]interface{}
+	if err := yaml.Unmarshal(b, &u); err != nil {
+		return nil, err
+	}
+	return runtime.DefaultUnstructuredConverter.FromUnstructured(u, obj), nil
+}