Remove ioutil for io and os

ioutil is deprecated and these methods are available in other
packages now.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

builder/publish.go

@@ -263,7 +263,7 @@ func callBuilder(tarPath, tempPath, builderAddress, functionName, payloadSecretP
 	}
 	defer tarFile.Close()
 
-	tarFileBytes, err := ioutil.ReadAll(tarFile)
+	tarFileBytes, err := io.ReadAll(tarFile)
 	if err != nil {
 		return nil, err
 	}

commands/invoke.go

@@ -6,7 +6,7 @@ package commands
 import (
 	"encoding/hex"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"os"
 
 	"github.com/alexellis/hmac"
@@ -95,7 +95,7 @@ func runInvoke(cmd *cobra.Command, args []string) error {
 		fmt.Fprintf(os.Stderr, "Reading from STDIN - hit (Control + D) to stop.\n")
 	}
 
-	functionInput, err := ioutil.ReadAll(os.Stdin)
+	functionInput, err := io.ReadAll(os.Stdin)
 	if err != nil {
 		return fmt.Errorf("unable to read standard input: %s", err.Error())
 	}

commands/login.go

@@ -5,7 +5,7 @@ package commands
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"os"
 	"strings"
@@ -71,7 +71,7 @@ func runLogin(cmd *cobra.Command, args []string) error {
 			return fmt.Errorf("must provide --username with --password-stdin")
 		}
 
-		passwordStdin, err := ioutil.ReadAll(os.Stdin)
+		passwordStdin, err := io.ReadAll(os.Stdin)
 		if err != nil {
 			return err
 		}
@@ -144,7 +144,7 @@ func validateLogin(gatewayURL string, user string, pass string, timeout time.Dur
 	case http.StatusUnauthorized:
 		return fmt.Errorf("unable to login, either username or password is incorrect")
 	default:
-		bytesOut, err := ioutil.ReadAll(res.Body)
+		bytesOut, err := io.ReadAll(res.Body)
 		if err == nil {
 			return fmt.Errorf("server returned unexpected status code: %d - %s", res.StatusCode, string(bytesOut))
 		}

commands/new_function.go

@@ -327,7 +327,7 @@ func printAvailableTemplates(availableTemplates []string) string {
 }
 
 func duplicateFunctionName(functionName string, appendFile string) error {
-	fileBytes, readErr := ioutil.ReadFile(appendFile)
+	fileBytes, readErr := os.ReadFile(appendFile)
 	if readErr != nil {
 		return fmt.Errorf("unable to read %s to append, %s", appendFile, readErr)
 	}

commands/registry_login.go

@@ -7,6 +7,7 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
+	"io"
 	"io/ioutil"
 	"os"
 	"path/filepath"
@@ -101,7 +102,7 @@ func generateRegistryAuthFile(command *cobra.Command, _ []string) error {
 
 	} else if passStdin {
 		fmt.Printf("Enter your password, hit enter then type Ctrl+D\n\nPassword: ")
-		passwordStdin, err := ioutil.ReadAll(os.Stdin)
+		passwordStdin, err := io.ReadAll(os.Stdin)
 		if err != nil {
 			return err
 		}

commands/secret_create.go

@@ -6,7 +6,7 @@ package commands
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"os"
 	"regexp"
 	"strings"
@@ -84,7 +84,7 @@ func runSecretCreate(cmd *cobra.Command, args []string) error {
 		secret.Value = literalSecret
 
 	case len(secretFile) > 0:
-		fileData, err := ioutil.ReadFile(secretFile)
+		fileData, err := os.ReadFile(secretFile)
 		if err != nil {
 			return err
 		}
@@ -99,7 +99,7 @@ func runSecretCreate(cmd *cobra.Command, args []string) error {
 			fmt.Fprintf(os.Stderr, "Reading from STDIN - hit (Control + D) to stop.\n")
 		}
 
-		secretStdin, err := ioutil.ReadAll(os.Stdin)
+		secretStdin, err := io.ReadAll(os.Stdin)
 		if err != nil {
 			return err
 		}

commands/secret_update.go

@@ -6,7 +6,7 @@ package commands
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"os"
 	"strings"
 
@@ -74,7 +74,7 @@ func runSecretUpdate(cmd *cobra.Command, args []string) error {
 		secret.Value = literalSecret
 
 	case len(secretFile) > 0:
-		content, err := ioutil.ReadFile(secretFile)
+		content, err := os.ReadFile(secretFile)
 		if err != nil {
 			return fmt.Errorf("unable to read secret file: %s", err.Error())
 		}
@@ -86,7 +86,7 @@ func runSecretUpdate(cmd *cobra.Command, args []string) error {
 			fmt.Fprintf(os.Stderr, "Reading from STDIN - hit (Control + D) to stop.\n")
 		}
 
-		secretStdin, err := ioutil.ReadAll(os.Stdin)
+		secretStdin, err := io.ReadAll(os.Stdin)
 		if err != nil {
 			return fmt.Errorf("unable to read standard input: %s", err.Error())
 		}

commands/store.go

@@ -6,7 +6,7 @@ package commands
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"strings"
 	"time"
@@ -73,7 +73,7 @@ func storeList(store string) ([]storeV2.StoreFunction, error) {
 
 	switch res.StatusCode {
 	case http.StatusOK:
-		bytesOut, err := ioutil.ReadAll(res.Body)
+		bytesOut, err := io.ReadAll(res.Body)
 		if err != nil {
 			return nil, fmt.Errorf("cannot read result from OpenFaaS store at URL: %s", store)
 		}
@@ -83,7 +83,7 @@ func storeList(store string) ([]storeV2.StoreFunction, error) {
 			return nil, fmt.Errorf("cannot parse result from OpenFaaS store at URL: %s\n%s", store, jsonErr.Error())
 		}
 	default:
-		bytesOut, err := ioutil.ReadAll(res.Body)
+		bytesOut, err := io.ReadAll(res.Body)
 		if err == nil {
 			return nil, fmt.Errorf("server returned unexpected status code: %d - %s", res.StatusCode, string(bytesOut))
 		}

commands/template_pull_stack.go

@@ -2,7 +2,6 @@ package commands
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 
 	"gopkg.in/yaml.v3"
@@ -55,7 +54,7 @@ func loadTemplateConfig() ([]stack.TemplateSource, error) {
 func readStackConfig() (stack.Configuration, error) {
 	configField := stack.Configuration{}
 
-	configFieldBytes, err := ioutil.ReadFile(yamlFile)
+	configFieldBytes, err := os.ReadFile(yamlFile)
 	if err != nil {
 		return configField, fmt.Errorf("can't read file %s, error: %s", yamlFile, err.Error())
 	}

commands/update_gitignore.go

@@ -1,7 +1,6 @@
 package commands
 
 import (
-	"io/ioutil"
 	"os"
 	"strings"
 )
@@ -43,7 +42,7 @@ func updateGitignore() (err error) {
 
 	defer f.Close()
 
-	content, err := ioutil.ReadFile(".gitignore")
+	content, err := os.ReadFile(".gitignore")
 	if err != nil {
 		return err
 	}

config/config_file.go

@@ -8,7 +8,6 @@ import (
 	"encoding/base64"
 
 	"fmt"
-	"io/ioutil"
 	"net/url"
 	"os"
 	"path"
@@ -179,7 +178,7 @@ func (configFile *ConfigFile) load() error {
 		return fmt.Errorf("can't load config from non existent filePath")
 	}
 
-	data, err := ioutil.ReadFile(configFile.FilePath)
+	data, err := os.ReadFile(configFile.FilePath)
 	if err != nil {
 		return err
 	}

proxy/delete.go

@@ -8,7 +8,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 
@@ -54,7 +54,7 @@ func (c *Client) DeleteFunction(ctx context.Context, functionName string, namesp
 		err = fmt.Errorf("unauthorized access, run \"faas-cli login\" to setup authentication for this server")
 	default:
 		var bodyReadErr error
-		bytesOut, bodyReadErr := ioutil.ReadAll(res.Body)
+		bytesOut, bodyReadErr := io.ReadAll(res.Body)
 		if bodyReadErr != nil {
 			err = bodyReadErr
 		} else {

proxy/deploy.go

@@ -8,7 +8,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 	"time"
@@ -175,7 +175,7 @@ func (c *Client) deploy(context context.Context, spec *DeployFunctionSpec, updat
 		deployOutput += fmt.Sprintln("unauthorized access, run \"faas-cli login\" to setup authentication for this server")
 
 	default:
-		bytesOut, err := ioutil.ReadAll(res.Body)
+		bytesOut, err := io.ReadAll(res.Body)
 		if err == nil {
 			deployOutput += fmt.Sprintf("Unexpected status: %d, message: %s\n", res.StatusCode, string(bytesOut))
 		}

proxy/describe.go

@@ -7,7 +7,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 	"path"
@@ -48,7 +48,7 @@ func (c *Client) GetFunctionInfo(ctx context.Context, functionName string, names
 
 	switch res.StatusCode {
 	case http.StatusOK:
-		bytesOut, err := ioutil.ReadAll(res.Body)
+		bytesOut, err := io.ReadAll(res.Body)
 		if err != nil {
 			return result, fmt.Errorf("cannot read result from OpenFaaS on URL: %s", c.GatewayURL.String())
 		}
@@ -63,7 +63,7 @@ func (c *Client) GetFunctionInfo(ctx context.Context, functionName string, names
 	case http.StatusNotFound:
 		return result, fmt.Errorf("no such function: %s", functionName)
 	default:
-		bytesOut, err := ioutil.ReadAll(res.Body)
+		bytesOut, err := io.ReadAll(res.Body)
 		if err == nil {
 			return result, fmt.Errorf("server returned unexpected status code: %d - %s", res.StatusCode, string(bytesOut))
 		}

proxy/function_store.go

@@ -3,11 +3,12 @@ package proxy
 import (
 	"encoding/json"
 	"fmt"
-	v2 "github.com/openfaas/faas-cli/schema/store/v2"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"strings"
 	"time"
+
+	v2 "github.com/openfaas/faas-cli/schema/store/v2"
 )
 
 type StoreResult struct {
@@ -38,7 +39,7 @@ func FunctionStoreList(store string) ([]v2.StoreFunction, error) {
 
 	switch res.StatusCode {
 	case http.StatusOK:
-		bytesOut, err := ioutil.ReadAll(res.Body)
+		bytesOut, err := io.ReadAll(res.Body)
 		if err != nil {
 			return nil, fmt.Errorf("cannot read result from OpenFaaS store at URL: %s", store)
 		}
@@ -48,7 +49,7 @@ func FunctionStoreList(store string) ([]v2.StoreFunction, error) {
 			return nil, fmt.Errorf("cannot parse result from OpenFaaS store at URL: %s\n%s", store, jsonErr.Error())
 		}
 	default:
-		bytesOut, err := ioutil.ReadAll(res.Body)
+		bytesOut, err := io.ReadAll(res.Body)
 		if err == nil {
 			return nil, fmt.Errorf("server returned unexpected status code: %d - %s", res.StatusCode, string(bytesOut))
 		}

proxy/invoke.go

@@ -5,10 +5,10 @@ package proxy
 
 import (
 	"bytes"
+	"io"
 	"os"
 
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"strings"
 	"time"
@@ -85,14 +85,14 @@ func InvokeFunction(gateway string, name string, bytesIn *[]byte, contentType st
 		fmt.Fprintf(os.Stderr, "Function submitted asynchronously.\n")
 	case http.StatusOK:
 		var readErr error
-		resBytes, readErr = ioutil.ReadAll(res.Body)
+		resBytes, readErr = io.ReadAll(res.Body)
 		if readErr != nil {
 			return nil, fmt.Errorf("cannot read result from OpenFaaS on URL: %s %s", gateway, readErr)
 		}
 	case http.StatusUnauthorized:
 		return nil, fmt.Errorf("unauthorized access, run \"faas-cli login\" to setup authentication for this server")
 	default:
-		bytesOut, err := ioutil.ReadAll(res.Body)
+		bytesOut, err := io.ReadAll(res.Body)
 		if err == nil {
 			return nil, fmt.Errorf("server returned unexpected status code: %d - %s", res.StatusCode, string(bytesOut))
 		}

proxy/list.go

@@ -6,9 +6,9 @@ package proxy
 import (
 	"context"
 	"encoding/json"
+	"io"
 
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 
@@ -50,7 +50,7 @@ func (c *Client) ListFunctions(ctx context.Context, namespace string) ([]types.F
 	switch res.StatusCode {
 	case http.StatusOK:
 
-		bytesOut, err := ioutil.ReadAll(res.Body)
+		bytesOut, err := io.ReadAll(res.Body)
 		if err != nil {
 			return nil, fmt.Errorf("cannot read result from OpenFaaS on URL: %s", c.GatewayURL.String())
 		}
@@ -61,7 +61,7 @@ func (c *Client) ListFunctions(ctx context.Context, namespace string) ([]types.F
 	case http.StatusUnauthorized:
 		return nil, fmt.Errorf("unauthorized access, run \"faas-cli login\" to setup authentication for this server")
 	default:
-		bytesOut, err := ioutil.ReadAll(res.Body)
+		bytesOut, err := io.ReadAll(res.Body)
 		if err == nil {
 			return nil, fmt.Errorf("server returned unexpected status code: %d - %s", res.StatusCode, string(bytesOut))
 		}

proxy/logs.go

@@ -5,7 +5,7 @@ import (
 	"crypto/tls"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"net/http"
 	"net/url"
@@ -56,7 +56,7 @@ func (c *Client) GetLogs(ctx context.Context, params logs.Request) (<-chan logs.
 	case http.StatusUnauthorized:
 		return nil, fmt.Errorf("unauthorized access, run \"faas-cli login\" to setup authentication for this server")
 	default:
-		bytesOut, err := ioutil.ReadAll(res.Body)
+		bytesOut, err := io.ReadAll(res.Body)
 		if err == nil {
 			return nil, fmt.Errorf("server returned unexpected status code: %d - %s", res.StatusCode, string(bytesOut))
 		}