⚠️ Inject filesystem from CLI instead of creating several per command

pkg/cli/api.go

@@ -76,7 +76,7 @@ func (c CLI) bindCreateAPI(ctx plugin.Context, cmd *cobra.Command) {
 		return
 	}
 
-	cfg, err := config.LoadInitialized()
+	cfg, err := config.LoadInitialized(c.fs)
 	if err != nil {
 		cmdErr(cmd, err)
 		return
@@ -88,6 +88,6 @@ func (c CLI) bindCreateAPI(ctx plugin.Context, cmd *cobra.Command) {
 	subcommand.UpdateContext(&ctx)
 	cmd.Long = ctx.Description
 	cmd.Example = ctx.Examples
-	cmd.RunE = runECmdFunc(cfg, subcommand,
+	cmd.RunE = runECmdFunc(c.fs, cfg, subcommand,
 		fmt.Sprintf("failed to create API with %q", plugin.KeyFor(createAPIPlugin)))
 }

pkg/cli/cli.go

@@ -21,12 +21,14 @@ import (
 	"os"
 	"strings"
 
+	"github.com/spf13/afero"
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
 
 	internalconfig "sigs.k8s.io/kubebuilder/v3/pkg/cli/internal/config"
 	"sigs.k8s.io/kubebuilder/v3/pkg/config"
 	cfgv3 "sigs.k8s.io/kubebuilder/v3/pkg/config/v3"
+	"sigs.k8s.io/kubebuilder/v3/pkg/machinery"
 	"sigs.k8s.io/kubebuilder/v3/pkg/plugin"
 )
 
@@ -88,6 +90,9 @@ type CLI struct { //nolint:maligned
 
 	// Root command.
 	cmd *cobra.Command
+
+	// Underlying fs
+	fs machinery.Filesystem
 }
 
 // New creates a new CLI instance.
@@ -131,6 +136,7 @@ func newCLI(options ...Option) (*CLI, error) {
 		defaultProjectVersion: cfgv3.Version,
 		defaultPlugins:        make(map[config.Version][]string),
 		plugins:               make(map[string]plugin.Plugin),
+		fs:                    machinery.Filesystem{FS: afero.NewOsFs()},
 	}
 
 	// Apply provided options.
@@ -188,9 +194,9 @@ func (c *CLI) getInfoFromFlags() (string, []string, error) {
 }
 
 // getInfoFromConfigFile obtains the project version and plugin keys from the project config file.
-func getInfoFromConfigFile() (config.Version, []string, error) {
+func (c CLI) getInfoFromConfigFile() (config.Version, []string, error) {
 	// Read the project configuration file
-	projectConfig, err := internalconfig.Read()
+	projectConfig, err := internalconfig.Read(c.fs)
 	switch {
 	case err == nil:
 	case os.IsNotExist(err):
@@ -294,7 +300,7 @@ func (c *CLI) getInfo() error {
 		return err
 	}
 	// Get project version and plugin info from project configuration file
-	cfgProjectVersion, cfgPlugins, _ := getInfoFromConfigFile()
+	cfgProjectVersion, cfgPlugins, _ := c.getInfoFromConfigFile()
 	// We discard the error because not being able to read a project configuration file
 	// is not fatal for some commands. The ones that require it need to check its existence.
 

pkg/cli/cli_test.go

@@ -23,11 +23,13 @@ import (
 
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+	"github.com/spf13/afero"
 	"github.com/spf13/cobra"
 
 	"sigs.k8s.io/kubebuilder/v3/pkg/config"
 	cfgv2 "sigs.k8s.io/kubebuilder/v3/pkg/config/v2"
 	cfgv3 "sigs.k8s.io/kubebuilder/v3/pkg/config/v3"
+	"sigs.k8s.io/kubebuilder/v3/pkg/machinery"
 	"sigs.k8s.io/kubebuilder/v3/pkg/plugin"
 )
 
@@ -585,6 +587,7 @@ var _ = Describe("CLI", func() {
 				defaultPlugins: map[config.Version][]string{
 					projectVersion: pluginKeys,
 				},
+				fs: machinery.Filesystem{FS: afero.NewMemMapFs()},
 			}
 			c.cmd = c.newRootCmd()
 			Expect(c.getInfo()).To(Succeed())

pkg/cli/cmd_helpers.go

@@ -22,6 +22,7 @@ import (
 	"github.com/spf13/cobra"
 
 	"sigs.k8s.io/kubebuilder/v3/pkg/cli/internal/config"
+	"sigs.k8s.io/kubebuilder/v3/pkg/machinery"
 	"sigs.k8s.io/kubebuilder/v3/pkg/plugin"
 )
 
@@ -48,12 +49,13 @@ func errCmdFunc(err error) func(*cobra.Command, []string) error {
 // runECmdFunc returns a cobra RunE function that runs subcommand and saves the
 // config, which may have been modified by subcommand.
 func runECmdFunc(
+	fs machinery.Filesystem,
 	c *config.Config,
 	subcommand plugin.Subcommand,
 	msg string,
 ) func(*cobra.Command, []string) error {
 	return func(*cobra.Command, []string) error {
-		if err := subcommand.Run(); err != nil {
+		if err := subcommand.Run(fs); err != nil {
 			return fmt.Errorf("%s: %v", msg, err)
 		}
 		return c.Save()

pkg/cli/edit.go

@@ -76,7 +76,7 @@ func (c CLI) bindEdit(ctx plugin.Context, cmd *cobra.Command) {
 		return
 	}
 
-	cfg, err := config.LoadInitialized()
+	cfg, err := config.LoadInitialized(c.fs)
 	if err != nil {
 		cmdErr(cmd, err)
 		return
@@ -88,6 +88,6 @@ func (c CLI) bindEdit(ctx plugin.Context, cmd *cobra.Command) {
 	subcommand.UpdateContext(&ctx)
 	cmd.Long = ctx.Description
 	cmd.Example = ctx.Examples
-	cmd.RunE = runECmdFunc(cfg, subcommand,
+	cmd.RunE = runECmdFunc(c.fs, cfg, subcommand,
 		fmt.Sprintf("failed to edit project with %q", plugin.KeyFor(editPlugin)))
 }

pkg/cli/init.go

@@ -136,7 +136,7 @@ func (c CLI) bindInit(ctx plugin.Context, cmd *cobra.Command) {
 		return
 	}
 
-	cfg, err := internalconfig.New(c.projectVersion, internalconfig.DefaultPath)
+	cfg, err := internalconfig.New(c.fs, c.projectVersion, internalconfig.DefaultPath)
 	if err != nil {
 		cmdErr(cmd, fmt.Errorf("unable to initialize the project configuration: %w", err))
 		return
@@ -151,11 +151,11 @@ func (c CLI) bindInit(ctx plugin.Context, cmd *cobra.Command) {
 	cmd.RunE = func(*cobra.Command, []string) error {
 		// Check if a config is initialized in the command runner so the check
 		// doesn't erroneously fail other commands used in initialized projects.
-		_, err := internalconfig.Read()
+		_, err := internalconfig.Read(c.fs)
 		if err == nil || os.IsExist(err) {
 			log.Fatal("config already initialized")
 		}
-		if err := subcommand.Run(); err != nil {
+		if err := subcommand.Run(c.fs); err != nil {
 			return fmt.Errorf("failed to initialize project with %q: %v", plugin.KeyFor(initPlugin), err)
 		}
 		return cfg.Save()

pkg/cli/internal/config/config.go

@@ -22,9 +22,10 @@ import (
 	"os"
 
 	"github.com/spf13/afero"
-	"sigs.k8s.io/yaml"
 
 	"sigs.k8s.io/kubebuilder/v3/pkg/config"
+	"sigs.k8s.io/kubebuilder/v3/pkg/machinery"
+	"sigs.k8s.io/yaml"
 )
 
 const (
@@ -81,13 +82,13 @@ func readFrom(fs afero.Fs, path string) (config.Config, error) {
 }
 
 // Read obtains the configuration from the default path but doesn't allow to persist changes
-func Read() (config.Config, error) {
-	return ReadFrom(DefaultPath)
+func Read(fs machinery.Filesystem) (config.Config, error) {
+	return ReadFrom(fs, DefaultPath)
 }
 
 // ReadFrom obtains the configuration from the provided path but doesn't allow to persist changes
-func ReadFrom(path string) (config.Config, error) {
-	return readFrom(afero.NewOsFs(), path)
+func ReadFrom(fs machinery.Filesystem, path string) (config.Config, error) {
+	return readFrom(fs.FS, path)
 }
 
 // Config extends model/config.Config allowing to persist changes
@@ -105,7 +106,7 @@ type Config struct {
 }
 
 // New creates a new configuration that will be stored at the provided path
-func New(version config.Version, path string) (*Config, error) {
+func New(fs machinery.Filesystem, version config.Version, path string) (*Config, error) {
 	cfg, err := config.New(version)
 	if err != nil {
 		return nil, err
@@ -115,37 +116,33 @@ func New(version config.Version, path string) (*Config, error) {
 		Config:       cfg,
 		path:         path,
 		mustNotExist: true,
-		fs:           afero.NewOsFs(),
+		fs:           fs.FS,
 	}, nil
 }
 
 // Load obtains the configuration from the default path allowing to persist changes (Save method)
-func Load() (*Config, error) {
-	return LoadFrom(DefaultPath)
+func Load(fs machinery.Filesystem) (*Config, error) {
+	return LoadFrom(fs, DefaultPath)
 }
 
 // LoadInitialized calls Load() but returns helpful error messages if the config
 // does not exist.
-func LoadInitialized() (*Config, error) {
-	c, err := Load()
+func LoadInitialized(fs machinery.Filesystem) (*Config, error) {
+	c, err := Load(fs)
 	if os.IsNotExist(err) {
 		return nil, errors.New("unable to find configuration file, project must be initialized")
 	}
 	return c, err
 }
 
 // LoadFrom obtains the configuration from the provided path allowing to persist changes (Save method)
-func LoadFrom(path string) (*Config, error) {
-	fs := afero.NewOsFs()
-	c, err := readFrom(fs, path)
-	return &Config{Config: c, path: path, fs: fs}, err
+func LoadFrom(fs machinery.Filesystem, path string) (*Config, error) {
+	c, err := readFrom(fs.FS, path)
+	return &Config{Config: c, path: path, fs: fs.FS}, err
 }
 
 // Save saves the configuration information
 func (c Config) Save() error {
-	if c.fs == nil {
-		c.fs = afero.NewOsFs()
-	}
 	// If path is unset, it was created directly with `Config{}`
 	if c.path == "" {
 		return saveError{errors.New("no information where it should be stored, " +

pkg/cli/webhook.go

@@ -76,7 +76,7 @@ func (c CLI) bindCreateWebhook(ctx plugin.Context, cmd *cobra.Command) {
 		return
 	}
 
-	cfg, err := config.LoadInitialized()
+	cfg, err := config.LoadInitialized(c.fs)
 	if err != nil {
 		cmdErr(cmd, err)
 		return
@@ -88,6 +88,6 @@ func (c CLI) bindCreateWebhook(ctx plugin.Context, cmd *cobra.Command) {
 	subcommand.UpdateContext(&ctx)
 	cmd.Long = ctx.Description
 	cmd.Example = ctx.Examples
-	cmd.RunE = runECmdFunc(cfg, subcommand,
+	cmd.RunE = runECmdFunc(c.fs, cfg, subcommand,
 		fmt.Sprintf("failed to create webhook with %q", plugin.KeyFor(createWebhookPlugin)))
 }

pkg/machinery/filesystem.go

@@ -0,0 +1,26 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package machinery
+
+import (
+	"github.com/spf13/afero"
+)
+
+// Filesystem abstracts the underlying disk for scaffolding
+type Filesystem struct {
+	FS afero.Fs
+}

pkg/plugin/interfaces.go

@@ -20,6 +20,7 @@ import (
 	"github.com/spf13/pflag"
 
 	"sigs.k8s.io/kubebuilder/v3/pkg/config"
+	"sigs.k8s.io/kubebuilder/v3/pkg/machinery"
 )
 
 // Plugin is an interface that defines the common base for all plugins
@@ -53,7 +54,7 @@ type Subcommand interface {
 	// command line flags.
 	BindFlags(*pflag.FlagSet)
 	// Run runs the subcommand.
-	Run() error
+	Run(fs machinery.Filesystem) error
 	// InjectConfig passes a config to a plugin. The plugin may modify the config.
 	// Initializing, loading, and saving the config is managed by the cli package.
 	InjectConfig(config.Config)

pkg/plugins/golang/v2/api.go

@@ -20,14 +20,13 @@ import (
 	"bufio"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
-	"path/filepath"
 	"strings"
 
 	"github.com/spf13/pflag"
 
 	"sigs.k8s.io/kubebuilder/v3/pkg/config"
+	"sigs.k8s.io/kubebuilder/v3/pkg/machinery"
 	"sigs.k8s.io/kubebuilder/v3/pkg/model"
 	"sigs.k8s.io/kubebuilder/v3/pkg/model/resource"
 	"sigs.k8s.io/kubebuilder/v3/pkg/plugin"
@@ -126,7 +125,7 @@ func (p *createAPISubcommand) InjectConfig(c config.Config) {
 	p.config = c
 }
 
-func (p *createAPISubcommand) Run() error {
+func (p *createAPISubcommand) Run(fs machinery.Filesystem) error {
 	// Ask for API and Controller if not specified
 	reader := bufio.NewReader(os.Stdin)
 	if !p.resourceFlag.Changed {
@@ -141,7 +140,7 @@ func (p *createAPISubcommand) Run() error {
 	// Create the resource from the options
 	p.resource = p.options.NewResource(p.config)
 
-	return cmdutil.Run(p)
+	return cmdutil.Run(p, fs)
 }
 
 func (p *createAPISubcommand) Validate() error {
@@ -171,12 +170,6 @@ func (p *createAPISubcommand) Validate() error {
 }
 
 func (p *createAPISubcommand) GetScaffolder() (cmdutil.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)
-	}
-
 	// Load the requested plugins
 	plugins := make([]model.Plugin, 0)
 	switch strings.ToLower(p.pattern) {
@@ -188,7 +181,7 @@ func (p *createAPISubcommand) GetScaffolder() (cmdutil.Scaffolder, error) {
 		return nil, fmt.Errorf("unknown pattern %q", p.pattern)
 	}
 
-	return scaffolds.NewAPIScaffolder(p.config, string(bp), p.resource, p.force, plugins), nil
+	return scaffolds.NewAPIScaffolder(p.config, p.resource, p.force, plugins), nil
 }
 
 func (p *createAPISubcommand) PostScaffold() error {

pkg/plugins/golang/v2/edit.go

@@ -22,6 +22,7 @@ import (
 	"github.com/spf13/pflag"
 
 	"sigs.k8s.io/kubebuilder/v3/pkg/config"
+	"sigs.k8s.io/kubebuilder/v3/pkg/machinery"
 	"sigs.k8s.io/kubebuilder/v3/pkg/plugin"
 	"sigs.k8s.io/kubebuilder/v3/pkg/plugins/golang/v2/scaffolds"
 	"sigs.k8s.io/kubebuilder/v3/pkg/plugins/internal/cmdutil"
@@ -57,8 +58,8 @@ func (p *editSubcommand) InjectConfig(c config.Config) {
 	p.config = c
 }
 
-func (p *editSubcommand) Run() error {
-	return cmdutil.Run(p)
+func (p *editSubcommand) Run(fs machinery.Filesystem) error {
+	return cmdutil.Run(p, fs)
 }
 
 func (p *editSubcommand) Validate() error {

pkg/plugins/golang/v2/init.go

@@ -27,6 +27,7 @@ import (
 	"sigs.k8s.io/kubebuilder/v3/pkg/config"
 	cfgv2 "sigs.k8s.io/kubebuilder/v3/pkg/config/v2"
 	"sigs.k8s.io/kubebuilder/v3/pkg/internal/validation"
+	"sigs.k8s.io/kubebuilder/v3/pkg/machinery"
 	"sigs.k8s.io/kubebuilder/v3/pkg/plugin"
 	"sigs.k8s.io/kubebuilder/v3/pkg/plugin/util"
 	"sigs.k8s.io/kubebuilder/v3/pkg/plugins/golang"
@@ -110,8 +111,8 @@ func (p *initSubcommand) InjectConfig(c config.Config) {
 	p.config = c
 }
 
-func (p *initSubcommand) Run() error {
-	return cmdutil.Run(p)
+func (p *initSubcommand) Run(fs machinery.Filesystem) error {
+	return cmdutil.Run(p, fs)
 }
 
 func (p *initSubcommand) Validate() error {