bundle create: fix issue where manifests/ is expected by the

operator-registry image builder but not generated by the SDK.
In case deploy/olm-catalog/<operator-name>/manifests doesn't
exist, create one and delete it after the image is done
building. If --generate-only is set, do not remove manifests/.
--version lets a user specify which operator version they want
to build an image for, and --latest uses the highest semver'd
operator in the bundle parent dir.

doc,website: update generated CLI docs

CHANGELOG.md: --output-dir addition and breaking change for bundle.Dockerfile location

doc/migration: add breaking change to migration guide

CHANGELOG.md

@@ -6,12 +6,13 @@
 - The methods `ctx.GetOperatorNamespace()` and `ctx.GetWatchNamespace()` was added `pkg/test` in order to replace `ctx.GetNamespace()` which is  deprecated. ([#2617](https://github.com/operator-framework/operator-sdk/pull/2617))
 - The `--crd-version` flag was added to the `new`, `add api`, `add crd`, and `generate crds` commands so that users can opt-in to `v1` CRDs. ([#2684](https://github.com/operator-framework/operator-sdk/pull/2684))
 - The printout for the compatible Kubernetes Version [#2446](https://github.com/operator-framework/operator-sdk/pull/2446)
-- Add the new flag `output-dir` to the command `operator-sdk bundle create`. ([#2662](https://github.com/operator-framework/operator-sdk/pull/2662))
+- Add the new flag `--output-dir` to the command [`operator-sdk bundle create`](./doc/cli/operator-sdk_bundle_create.md). ([#2715](https://github.com/operator-framework/operator-sdk/pull/2715))
 
 ### Changed
 
 - The scorecard when creating a Custom Resource, will produce a message to the user if that CR already exists. ([#2683](https://github.com/operator-framework/operator-sdk/pull/2683))
 - Upgrade the `operator-registry` dependency version from `v1.5.7`to `v1.6.0` to update `bundle create` behaviour. ([#2662](https://github.com/operator-framework/operator-sdk/pull/2662))
+- **Breaking Change:** [`operator-sdk bundle create --generate-only`](./doc/cli/operator-sdk_bundle_create.md) now writes a Dockerfile to `<project-root>/bundle.Dockerfile` and copies bundle manifests directly from the argument to `--directory`. ([#2715](https://github.com/operator-framework/operator-sdk/pull/2715))
 
 ### Deprecated
 

cmd/operator-sdk/bundle/cmd.go

@@ -15,13 +15,20 @@
 package bundle
 
 import (
-	"os"
-	"path/filepath"
-
-	"github.com/operator-framework/operator-registry/pkg/lib/bundle"
 	"github.com/spf13/cobra"
 )
 
+//nolint:structcheck
+type bundleCmd struct {
+	directory      string
+	packageName    string
+	imageTag       string
+	imageBuilder   string
+	defaultChannel string
+	channels       []string
+	generateOnly   bool
+}
+
 func NewCmd() *cobra.Command {
 	cmd := &cobra.Command{
 		Use:   "bundle",
@@ -39,48 +46,3 @@ https://github.com/openshift/enhancements/blob/master/enhancements/olm/operator-
 	)
 	return cmd
 }
-
-type bundleCmd struct {
-	directory      string
-	outputDir      string
-	packageName    string
-	imageTag       string
-	imageBuilder   string
-	defaultChannel string
-	channels       []string
-	generateOnly   bool
-}
-
-// cleanupFuncs returns a set of general funcs to clean up after a bundle
-// subcommand.
-func (c bundleCmd) cleanupFuncs() (fs []func()) {
-	manifestDir := c.outputDir
-	if manifestDir == "" {
-		manifestDir = c.directory
-	}
-	absManifestDir, _ := filepath.Abs(manifestDir)
-	manifestParent := filepath.Dir(absManifestDir)
-	metaDir := filepath.Join(manifestParent, bundle.MetadataDir)
-	metaExists := isExist(metaDir)
-
-	workingDir, _ := os.Getwd()
-	dockerFile := filepath.Join(workingDir, bundle.DockerFile)
-	dockerFileExists := isExist(dockerFile)
-	fs = append(fs,
-		func() {
-			if !metaExists {
-				_ = os.RemoveAll(metaDir)
-			}
-		},
-		func() {
-			if !dockerFileExists {
-				_ = os.RemoveAll(dockerFile)
-			}
-		})
-	return fs
-}
-
-func isExist(path string) bool {
-	_, err := os.Stat(path)
-	return os.IsExist(err)
-}