Move file related models to pkg/model/file

- Move model.File to its own subpackage
- Change input.File name to input.Template to avoid collisions with file.File
- Move pkg/scaffold/input into pkg/model/file
- Delete unused tests
- Resolve naming conflicts
- Stop injecting ProjectPath, BoilerplatePath and Version into templates
    BoilerplatePath is being used once in v1 and once in v2, and the rest are never being used, so injeceting them is not justified.
- Inject from universe instead of from scaffold
- Remove unused fields from Scaffold
- Remove validate function as was only used once and has 3 LoC
- Remove file.Options
- model.UniverseOptions and model.NewUniverse no longer return an error

cmd/api.go

@@ -20,8 +20,10 @@ import (
 	"bufio"
 	"errors"
 	"fmt"
+	"io/ioutil"
 	"log"
 	"os"
+	"path/filepath"
 	"strings"
 
 	"github.com/spf13/cobra"
@@ -202,6 +204,12 @@ func (o *apiOptions) validate(c *config.Config) error {
 }
 
 func (o *apiOptions) scaffolder(c *config.Config) (scaffold.Scaffolder, error) {
+	// Load the boilerplate
+	bp, err := ioutil.ReadFile(filepath.Join("hack", "boilerplate.go.txt")) // nolint:gosec
+	if err != nil {
+		return nil, fmt.Errorf("unable to load boilerplate: %v", err)
+	}
+
 	// Create the actual resource from the resource options
 	var res *resource.Resource
 	switch {
@@ -226,7 +234,7 @@ func (o *apiOptions) scaffolder(c *config.Config) (scaffold.Scaffolder, error) {
 		return nil, fmt.Errorf("unknown pattern %q", o.pattern)
 	}
 
-	return scaffold.NewAPIScaffolder(c, res, o.doResource, o.doController, plugins), nil
+	return scaffold.NewAPIScaffolder(c, string(bp), res, o.doResource, o.doController, plugins), nil
 }
 
 func (o *apiOptions) postScaffold(_ *config.Config) error {

cmd/webhook.go

@@ -19,8 +19,10 @@ package main
 import (
 	"errors"
 	"fmt"
+	"io/ioutil"
 	"log"
 	"os"
+	"path/filepath"
 
 	"github.com/spf13/cobra"
 
@@ -110,7 +112,13 @@ func (o *webhookV1Options) validate(c *config.Config) error {
 	return nil
 }
 
-func (o *webhookV1Options) scaffolder(c *config.Config) (scaffold.Scaffolder, error) { // nolint:unparam
+func (o *webhookV1Options) scaffolder(c *config.Config) (scaffold.Scaffolder, error) {
+	// Load the boilerplate
+	bp, err := ioutil.ReadFile(filepath.Join("hack", "boilerplate.go.txt")) // nolint:gosec
+	if err != nil {
+		return nil, fmt.Errorf("unable to load boilerplate: %v", err)
+	}
+
 	// Create the actual resource from the resource options
 	var res *resource.Resource
 	switch {
@@ -122,7 +130,7 @@ func (o *webhookV1Options) scaffolder(c *config.Config) (scaffold.Scaffolder, er
 		return nil, fmt.Errorf("unknown project version %v", c.Version)
 	}
 
-	return scaffold.NewV1WebhookScaffolder(&c.Config, res, o.server, o.webhookType, o.operations), nil
+	return scaffold.NewV1WebhookScaffolder(&c.Config, string(bp), res, o.server, o.webhookType, o.operations), nil
 }
 
 func (o *webhookV1Options) postScaffold(_ *config.Config) error {
@@ -213,6 +221,12 @@ func (o *webhookV2Options) validate(c *config.Config) error {
 }
 
 func (o *webhookV2Options) scaffolder(c *config.Config) (scaffold.Scaffolder, error) { // nolint:unparam
+	// Load the boilerplate
+	bp, err := ioutil.ReadFile(filepath.Join("hack", "boilerplate.go.txt")) // nolint:gosec
+	if err != nil {
+		return nil, fmt.Errorf("unable to load boilerplate: %v", err)
+	}
+
 	// Create the actual resource from the resource options
 	var res *resource.Resource
 	switch {
@@ -224,7 +238,7 @@ func (o *webhookV2Options) scaffolder(c *config.Config) (scaffold.Scaffolder, er
 		return nil, fmt.Errorf("unknown project version %v", c.Version)
 	}
 
-	return scaffold.NewV2WebhookScaffolder(&c.Config, res, o.defaulting, o.validation, o.conversion), nil
+	return scaffold.NewV2WebhookScaffolder(&c.Config, string(bp), res, o.defaulting, o.validation, o.conversion), nil
 }
 
 func (o *webhookV2Options) postScaffold(_ *config.Config) error {

pkg/model/file.go → pkg/model/file/file.go

@@ -14,10 +14,20 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-package model
+package file
 
-import (
-	"sigs.k8s.io/kubebuilder/pkg/scaffold/input"
+// IfExistsAction determines what to do if the scaffold file already exists
+type IfExistsAction int
+
+const (
+	// Skip skips the file and moves to the next one
+	Skip IfExistsAction = iota
+
+	// Error returns an error and stops processing
+	Error
+
+	// Overwrite truncates and overwrites the existing file
+	Overwrite
 )
 
 // File describes a file that will be written
@@ -28,7 +38,6 @@ type File struct {
 	// Contents is the generated output
 	Contents string `json:"contents,omitempty"`
 
-	// TODO: Move input.IfExistsAction into model
 	// IfExistsAction determines what to do if the file exists
-	IfExistsAction input.IfExistsAction `json:"ifExistsAction,omitempty"`
+	IfExistsAction IfExistsAction `json:"ifExistsAction,omitempty"`
 }

pkg/scaffold/input/input.go → pkg/model/file/template.go

@@ -14,21 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-package input
-
-// IfExistsAction determines what to do if the scaffold file already exists
-type IfExistsAction int
-
-const (
-	// Skip skips the file and moves to the next one
-	Skip IfExistsAction = iota
-
-	// Error returns an error and stops processing
-	Error
-
-	// Overwrite truncates and overwrites the existing file
-	Overwrite
-)
+package file
 
 // Input is the input for scaffolding a file
 type Input struct {
@@ -44,21 +30,12 @@ type Input struct {
 	// Boilerplate is the contents of a Boilerplate go header file
 	Boilerplate string
 
-	// BoilerplatePath is the path to a Boilerplate go header file
-	BoilerplatePath string
-
-	// Version is the project version
-	Version string
-
 	// Domain is the domain for the APIs
 	Domain string
 
 	// Repo is the go project package
 	Repo string
 
-	// ProjectPath is the relative path to the project root
-	ProjectPath string
-
 	// MultiGroup is the multi-group boolean from the PROJECT file
 	MultiGroup bool
 }
@@ -102,32 +79,6 @@ func (i *Input) SetBoilerplate(b string) {
 	}
 }
 
-// BoilerplatePath allows boilerplate file path to be set on an object
-type BoilerplatePath interface {
-	// SetBoilerplatePath sets the boilerplate file path
-	SetBoilerplatePath(string)
-}
-
-// SetBoilerplatePath sets the boilerplate file path
-func (i *Input) SetBoilerplatePath(bp string) {
-	if i.BoilerplatePath == "" {
-		i.BoilerplatePath = bp
-	}
-}
-
-// Version allows the project version to be set on an object
-type Version interface {
-	// SetVersion sets the project version
-	SetVersion(string)
-}
-
-// SetVersion sets the project version
-func (i *Input) SetVersion(v string) {
-	if i.Version == "" {
-		i.Version = v
-	}
-}
-
 // MultiGroup allows the project version to be set on an object
 type MultiGroup interface {
 	// SetVersion sets the project version
@@ -139,37 +90,15 @@ func (i *Input) SetMultiGroup(v bool) {
 	i.MultiGroup = v
 }
 
-// ProjecPath allows the project path to be set on an object
-type ProjecPath interface {
-	// SetProjectPath sets the project file location
-	SetProjectPath(string)
-}
-
-// SetProjectPath sets the project path
-func (i *Input) SetProjectPath(p string) {
-	if i.ProjectPath == "" {
-		i.ProjectPath = p
-	}
-}
-
-// File is a scaffoldable file
-type File interface {
+// Template is a scaffoldable file template
+type Template interface {
 	// GetInput returns the Input for creating a scaffold file
 	GetInput() (Input, error)
 }
 
 // RequiresValidation is a file that requires validation
 type RequiresValidation interface {
-	File
+	Template
 	// Validate returns true if the template has valid values
 	Validate() error
 }
-
-// Options are the options for executing scaffold templates
-type Options struct {
-	// BoilerplatePath is the path to the boilerplate file
-	BoilerplatePath string
-
-	// Path is the path to the project
-	ProjectPath string
-}

pkg/model/universe.go

@@ -17,9 +17,8 @@ limitations under the License.
 package model
 
 import (
-	"io/ioutil"
-
 	"sigs.k8s.io/kubebuilder/pkg/model/config"
+	"sigs.k8s.io/kubebuilder/pkg/model/file"
 	"sigs.k8s.io/kubebuilder/pkg/model/resource"
 )
 
@@ -35,66 +34,65 @@ type Universe struct {
 	Resource *resource.Resource `json:"resource,omitempty"`
 
 	// Files contains the model of the files that are being scaffolded
-	Files []*File `json:"files,omitempty"`
+	Files []*file.File `json:"files,omitempty"`
 }
 
 // NewUniverse creates a new Universe
-func NewUniverse(options ...UniverseOption) (*Universe, error) {
+func NewUniverse(options ...UniverseOption) *Universe {
 	universe := &Universe{}
 
 	// Apply options
 	for _, option := range options {
-		if err := option(universe); err != nil {
-			return nil, err
-		}
+		option(universe)
 	}
 
-	return universe, nil
+	return universe
 }
 
 // UniverseOption configure Universe
-type UniverseOption func(*Universe) error
+type UniverseOption func(*Universe)
 
 // WithConfig stores the already loaded project configuration
 func WithConfig(projectConfig *config.Config) UniverseOption {
-	return func(universe *Universe) error {
+	return func(universe *Universe) {
 		universe.Config = projectConfig
-		return nil
-	}
-}
-
-// WithBoilerplateFrom loads the boilerplate from the provided path
-func WithBoilerplateFrom(path string) UniverseOption {
-	return func(universe *Universe) error {
-		boilerplate, err := ioutil.ReadFile(path)
-		if err != nil {
-			return err
-		}
-
-		universe.Boilerplate = string(boilerplate)
-		return nil
 	}
 }
 
 // WithBoilerplate stores the already loaded project configuration
 func WithBoilerplate(boilerplate string) UniverseOption {
-	return func(universe *Universe) error {
+	return func(universe *Universe) {
 		universe.Boilerplate = boilerplate
-		return nil
 	}
 }
 
 // WithoutBoilerplate is used for files that do not require a boilerplate
-func WithoutBoilerplate(universe *Universe) error {
-	universe.Boilerplate = "-"
-	return nil
+func WithoutBoilerplate(universe *Universe) {
+	universe.Boilerplate = ""
 }
 
 // WithResource stores the provided resource
 func WithResource(resource *resource.Resource) UniverseOption {
-	return func(universe *Universe) error {
+	return func(universe *Universe) {
 		universe.Resource = resource
+	}
+}
 
-		return nil
+func (u Universe) InjectInto(t file.Template) {
+	// Inject project configuration
+	if u.Config != nil {
+		if templateWithDomain, ok := t.(file.Domain); ok {
+			templateWithDomain.SetDomain(u.Config.Domain)
+		}
+		if templateWithRepository, ok := t.(file.Repo); ok {
+			templateWithRepository.SetRepo(u.Config.Repo)
+		}
+		if templateWithMultiGroup, ok := t.(file.MultiGroup); ok {
+			templateWithMultiGroup.SetMultiGroup(u.Config.MultiGroup)
+		}
+	}
+	// Inject boilerplate
+	if templateWithBoilerplate, ok := t.(file.Boilerplate); ok {
+		templateWithBoilerplate.SetBoilerplate(u.Boilerplate)
 	}
 }