feat: add config file for optional groupping

README.md

@@ -107,6 +107,27 @@ cty generate crd -r folder
 
 Any other flag will work as before.
 
+### Config File
+
+It's possible to define a config file that designates groups for various rendered CRDs.
+
+To use a config file, set the switch `--config`. A sample config file could look something like this:
+
+```yaml
+apiGroups:
+  - name: "com.aws.services"
+    description: "Resources related to AWS services"
+    files: # files and folders can be defined together or on their own
+      - sample-crd/infrastructure.cluster.x-k8s.io_awsclusters.yaml
+      - sample-crd/delivery.krok.app_krokcommands
+  - name: "com.azure.services"
+    description: "Resources related to Azure services"
+    folders:
+      - azure-crds
+```
+
+![rendered with groups](imgs/parsed4_groups.png)
+
 ## Schema Generation
 
 `cty` also provides a way to generate a JSON Schema out of a CRD. Simply use:

cmd/config_handler.go

@@ -0,0 +1,57 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"k8s.io/apimachinery/pkg/util/yaml"
+
+	"github.com/Skarlso/crd-to-sample-yaml/pkg"
+)
+
+type ConfigHandler struct {
+	configFileLocation string
+}
+
+func (h *ConfigHandler) CRDs() ([]*pkg.SchemaType, error) {
+	if _, err := os.Stat(h.configFileLocation); os.IsNotExist(err) {
+		return nil, fmt.Errorf("file under '%s' does not exist", h.configFileLocation)
+	}
+	content, err := os.ReadFile(h.configFileLocation)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read file: %w", err)
+	}
+
+	configFile := &pkg.RenderConfig{}
+	if err = yaml.Unmarshal(content, configFile); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal config file: %w", err)
+	}
+
+	// for each api group, call file handler and folder handler and gather all
+	// the CRDs.
+	var result []*pkg.SchemaType
+
+	for _, group := range configFile.ApiGroups {
+		for _, file := range group.Files {
+			handler := FileHandler{location: file, group: group.Name}
+			fileResults, err := handler.CRDs()
+			if err != nil {
+				return nil, fmt.Errorf("failed to process CRDs for files in groups %s: %w", group.Name, err)
+			}
+
+			result = append(result, fileResults...)
+		}
+
+		for _, folder := range group.Folders {
+			handler := FolderHandler{location: folder, group: group.Name}
+			folderResults, err := handler.CRDs()
+			if err != nil {
+				return nil, fmt.Errorf("failed to process CRDs for folders %s: %w", handler.location, err)
+			}
+
+			result = append(result, folderResults...)
+		}
+	}
+
+	return result, nil
+}

cmd/crd.go

@@ -57,6 +57,10 @@ func runGenerate(_ *cobra.Command, _ []string) error {
 	}
 
 	if crdArgs.format == FormatHTML {
+		if crdArgs.output == "" {
+			return fmt.Errorf("output must be set to a filename if format is HTML")
+		}
+
 		if err := pkg.LoadTemplates(); err != nil {
 			return fmt.Errorf("failed to load templates: %w", err)
 		}
@@ -78,12 +82,6 @@ func runGenerate(_ *cobra.Command, _ []string) error {
 	}
 
 	var w io.WriteCloser
-	defer func() {
-		if err := w.Close(); err != nil {
-			_, _ = fmt.Fprintf(os.Stderr, "failed to close output file: %s", err.Error())
-		}
-	}()
-
 	if crdArgs.format == FormatHTML {
 		if crdArgs.stdOut {
 			w = os.Stdout
@@ -94,7 +92,13 @@ func runGenerate(_ *cobra.Command, _ []string) error {
 			}
 		}
 
-		return pkg.RenderContent(w, crds, crdArgs.comments, crdArgs.minimal, crdArgs.skipRandom)
+		opts := pkg.RenderOpts{
+			Comments: crdArgs.comments,
+			Minimal:  crdArgs.minimal,
+			Random:   crdArgs.skipRandom,
+		}
+
+		return pkg.RenderContent(w, crds, opts)
 	}
 
 	var errs []error //nolint:prealloc // nope
@@ -128,6 +132,8 @@ func constructHandler(args *rootArgs) (Handler, error) {
 		crdHandler = &FileHandler{location: args.fileLocation}
 	case args.folderLocation != "":
 		crdHandler = &FolderHandler{location: args.folderLocation}
+	case args.configFileLocation != "":
+		crdHandler = &ConfigHandler{configFileLocation: args.configFileLocation}
 	case args.url != "":
 		crdHandler = &URLHandler{
 			url:      args.url,
@@ -138,7 +144,7 @@ func constructHandler(args *rootArgs) (Handler, error) {
 	}
 
 	if crdHandler == nil {
-		return nil, errors.New("one of the flags (file, folder, url) must be set")
+		return nil, errors.New("one of the flags (file, folder, url, configFile) must be set")
 	}
 
 	return crdHandler, nil

cmd/file_handler.go

@@ -13,6 +13,7 @@ import (
 
 type FileHandler struct {
 	location string
+	group    string
 }
 
 func (h *FileHandler) CRDs() ([]*pkg.SchemaType, error) {
@@ -43,5 +44,9 @@ func (h *FileHandler) CRDs() ([]*pkg.SchemaType, error) {
 		return nil, nil
 	}
 
+	if h.group != "" {
+		schemaType.Rendering = pkg.Rendering{Group: h.group}
+	}
+
 	return []*pkg.SchemaType{schemaType}, nil
 }

cmd/folder_handler.go

@@ -15,6 +15,7 @@ import (
 
 type FolderHandler struct {
 	location string
+	group    string
 }
 
 func (h *FolderHandler) CRDs() ([]*pkg.SchemaType, error) {
@@ -34,7 +35,7 @@ func (h *FolderHandler) CRDs() ([]*pkg.SchemaType, error) {
 		}
 
 		if filepath.Ext(path) != ".yaml" {
-			fmt.Fprintln(os.Stderr, "skipping file "+path)
+			_, _ = fmt.Fprintln(os.Stderr, "skipping file "+path)
 
 			return nil
 		}
@@ -51,7 +52,7 @@ func (h *FolderHandler) CRDs() ([]*pkg.SchemaType, error) {
 
 		crd := &unstructured.Unstructured{}
 		if err := yaml.Unmarshal(content, crd); err != nil {
-			fmt.Fprintln(os.Stderr, "skipping none CRD file: "+path)
+			_, _ = fmt.Fprintln(os.Stderr, "skipping none CRD file: "+path)
 
 			return nil //nolint:nilerr // intentional
 		}
@@ -61,6 +62,10 @@ func (h *FolderHandler) CRDs() ([]*pkg.SchemaType, error) {
 		}
 
 		if schemaType != nil {
+			if h.group != "" {
+				schemaType.Rendering = pkg.Rendering{Group: h.group}
+			}
+
 			crds = append(crds, schemaType)
 		}
 

cmd/generate.go

@@ -5,12 +5,13 @@ import (
 )
 
 type rootArgs struct {
-	fileLocation   string
-	folderLocation string
-	url            string
-	username       string
-	password       string
-	token          string
+	fileLocation       string
+	folderLocation     string
+	configFileLocation string
+	url                string
+	username           string
+	password           string
+	token              string
 }
 
 var (
@@ -33,4 +34,5 @@ func init() {
 	f.StringVar(&args.username, "username", "", "Optional username to authenticate a URL.")
 	f.StringVar(&args.password, "password", "", "Optional password to authenticate a URL.")
 	f.StringVar(&args.token, "token", "", "A bearer token to authenticate a URL.")
+	f.StringVar(&args.configFileLocation, "config", "", "An optional configuration file that can define grouping data for various rendered crds.")
 }

pkg/config_file_schema.go

@@ -0,0 +1,14 @@
+package pkg
+
+// ApiGroups defines groups by which grouping will happen in the resulting HTML output.
+type ApiGroups struct {
+	Name        string   `json:"name"`
+	Description string   `json:"description"`
+	Files       []string `json:"files,omitempty"`
+	Folders     []string `json:"folders,omitempty"`
+}
+
+// RenderConfig defines a configuration for the resulting rendered HTML content.
+type RenderConfig struct {
+	ApiGroups []ApiGroups `json:"apiGroups"`
+}

pkg/create_html_output.go

@@ -7,12 +7,15 @@ import (
 	"html/template"
 	"io"
 	"io/fs"
+	"os"
 	"slices"
 	"sort"
 
 	"github.com/Skarlso/crd-to-sample-yaml/v1beta1"
 )
 
+const defaultGroup = "Ungrouped"
+
 type Index struct {
 	Page []ViewPage
 }
@@ -64,47 +67,81 @@ func LoadTemplates() error {
 	return nil
 }
 
+// Group defines a single group with a list of rendered versions.
+type Group struct {
+	Name string
+	Page []ViewPage
+}
+
+// GroupPage will have a list of groups and inside these groups
+// will be a list of page views.
+type GroupPage struct {
+	Groups []Group
+}
+
+type RenderOpts struct {
+	Comments bool
+	Minimal  bool
+	Random   bool
+}
+
 // RenderContent creates an HTML website from the CRD content.
-func RenderContent(w io.WriteCloser, crds []*SchemaType, comments, minimal, random bool) (err error) {
-	allViews := make([]ViewPage, 0, len(crds))
+func RenderContent(w io.WriteCloser, crds []*SchemaType, opts RenderOpts) (err error) {
+	defer func() {
+		if err := w.Close(); err != nil {
+			_, _ = fmt.Fprintf(os.Stderr, "failed to close output file: %s", err.Error())
+		}
+	}()
 
-	for _, crd := range crds {
-		versions := make([]Version, 0)
-		parser := NewParser(crd.Group, crd.Kind, comments, minimal, random)
+	groups := buildUpGroup(crds)
 
-		for _, version := range crd.Versions {
-			v, err := generate(version.Name, crd.Group, crd.Kind, version.Schema, minimal, parser)
-			if err != nil {
-				return fmt.Errorf("failed to generate yaml sample: %w", err)
+	allGroups := make([]Group, 0)
+	for name, group := range groups {
+		allViews := make([]ViewPage, 0, len(group))
+
+		for _, crd := range group {
+			versions := make([]Version, 0)
+			parser := NewParser(crd.Group, crd.Kind, opts.Comments, opts.Minimal, opts.Random)
+
+			for _, version := range crd.Versions {
+				v, err := generate(version.Name, crd.Group, crd.Kind, version.Schema, opts.Minimal, parser)
+				if err != nil {
+					return fmt.Errorf("failed to generate yaml sample: %w", err)
+				}
+
+				versions = append(versions, v)
 			}
 
-			versions = append(versions, v)
-		}
+			// parse validation instead
+			if len(versions) == 0 && crd.Validation != nil {
+				version, err := generate(crd.Validation.Name, crd.Group, crd.Kind, crd.Validation.Schema, opts.Minimal, parser)
+				if err != nil {
+					return fmt.Errorf("failed to generate yaml sample: %w", err)
+				}
 
-		// parse validation instead
-		if len(versions) == 0 && crd.Validation != nil {
-			version, err := generate(crd.Validation.Name, crd.Group, crd.Kind, crd.Validation.Schema, minimal, parser)
-			if err != nil {
-				return fmt.Errorf("failed to generate yaml sample: %w", err)
+				versions = append(versions, version)
+			} else if len(versions) == 0 {
+				continue
 			}
 
-			versions = append(versions, version)
-		} else if len(versions) == 0 {
-			continue
-		}
+			view := ViewPage{
+				Title:    crd.Kind,
+				Versions: versions,
+			}
 
-		view := ViewPage{
-			Title:    crd.Kind,
-			Versions: versions,
+			allViews = append(allViews, view)
 		}
 
-		allViews = append(allViews, view)
+		allGroups = append(allGroups, Group{
+			Name: name,
+			Page: allViews,
+		})
 	}
 
-	t := templates["view.html"]
+	t := templates["view_with_groups.html"]
 
-	index := Index{
-		Page: allViews,
+	index := GroupPage{
+		Groups: allGroups,
 	}
 
 	if err := t.Execute(w, index); err != nil {
@@ -114,6 +151,20 @@ func RenderContent(w io.WriteCloser, crds []*SchemaType, comments, minimal, rand
 	return nil
 }
 
+func buildUpGroup(crds []*SchemaType) map[string][]*SchemaType {
+	var result = make(map[string][]*SchemaType)
+	for _, crd := range crds {
+		// TODO: If empty, it should be the api version
+		if crd.Rendering.Group == "" {
+			crd.Rendering.Group = crd.Group
+		}
+
+		result[crd.Rendering.Group] = append(result[crd.Rendering.Group], crd)
+	}
+
+	return result
+}
+
 func generate(name, group, kind string, properties *v1beta1.JSONSchemaProps, minimal bool, parser *Parser) (Version, error) {
 	out, err := parseCRD(properties.Properties, name, minimal, group, kind, RootRequiredFields, 0)
 	if err != nil {