address review comments

cmd/drone-docker/main.go

@@ -225,17 +225,17 @@ func main() {
 		cli.StringFlag{
 			Name:   "docker.baseimageusername",
 			Usage:  "Docker username for base image registry",
-			EnvVar: "PLUGIN_DOCKER_USERNAME,PLUGIN_BASE_IMAGE_USERNAME",
+			EnvVar: "PLUGIN_DOCKER_USERNAME,PLUGIN_BASE_IMAGE_USERNAME,DOCKER_BASE_IMAGE_USERNAME",
 		},
 		cli.StringFlag{
 			Name:   "docker.baseimagepassword",
 			Usage:  "Docker password for base image registry",
-			EnvVar: "PLUGIN_DOCKER_PASSWORD,PLUGIN_BASE_IMAGE_PASSWORD",
+			EnvVar: "PLUGIN_DOCKER_PASSWORD,PLUGIN_BASE_IMAGE_PASSWORD,DOCKER_BASE_IMAGE_PASSWORD",
 		},
 		cli.StringFlag{
 			Name:   "docker.baseimageregistry",
 			Usage:  "Docker registry for base image registry",
-			EnvVar: "PLUGIN_DOCKER_REGISTRY,PLUGIN_BASE_IMAGE_REGISTRY",
+			EnvVar: "PLUGIN_DOCKER_REGISTRY,PLUGIN_BASE_IMAGE_REGISTRY,DOCKER_BASE_IMAGE_REGISTRY",
 		},
 		cli.StringFlag{
 			Name:   "docker.email",

docker.go

@@ -1,6 +1,7 @@
 package docker
 
 import (
+	"errors"
 	"fmt"
 	"os"
 	"os/exec"
@@ -11,7 +12,6 @@ import (
 
 	"github.com/drone-plugins/drone-docker/internal/docker"
 	"github.com/drone-plugins/drone-plugin-lib/drone"
-	"github.com/pkg/errors"
 )
 
 type (
@@ -163,7 +163,7 @@ func (p Plugin) Exec() error {
 			return fmt.Errorf("Error writing config.json: %s", err)
 		}
 		_, err = file.Write([]byte(p.Login.Config))
-		fmt.Println("Writing p.Login.Config: %s", p.Login.Config)
+		fmt.Println("Writing p.Login.Config")
 
 		if err != nil {
 			return fmt.Errorf("Error writing config.json: %s", err)
@@ -175,7 +175,7 @@ func (p Plugin) Exec() error {
 		json, err := setDockerAuth(p.Login.Username, p.Login.Password, p.Login.Registry,
 			p.BaseImageUsername, p.BaseImagePassword, p.BaseImageRegistry)
 		if err != nil {
-			return errors.Wrap(err, "Failed to set authentication in docker config")
+			return fmt.Errorf("Failed to set authentication in docker config %s", err)
 		}
 		if json != nil {
 			path := filepath.Join(dockerHome, "config.json")
@@ -306,15 +306,15 @@ func setDockerAuth(username, password, registry, baseImageUsername,
 	baseImagePassword, baseImageRegistry string) ([]byte, error) {
 	var credentials []docker.RegistryCredentials
 	// add only docker registry to the config
+	dockerConfig := docker.NewConfig()
 	if password != "" && strings.Contains(registry, "docker") {
-		dockerConfig := docker.NewConfig()
 		pushToRegistryCreds := docker.RegistryCredentials{
 			Registry: registry,
 			Username: username,
 			Password: password,
 		}
 		// push registry auth
-		credentials := append(credentials, pushToRegistryCreds)
+		credentials = append(credentials, pushToRegistryCreds)
 	}
 
 	if baseImageRegistry != "" {

internal/docker/config.go

@@ -3,11 +3,11 @@ package docker
 import (
 	"encoding/base64"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
-
-	"github.com/pkg/errors"
+	"strings"
 )
 
 const (
@@ -43,7 +43,6 @@ func NewConfig() *Config {
 func (c *Config) SetAuth(registry, username, password string) {
 	authBytes := []byte(username + ":" + password)
 	encodedString := base64.StdEncoding.EncodeToString(authBytes)
-	log.Printf("auth : %s", encodedString)
 	c.Auths[registry] = Auth{Auth: encodedString}
 }
 
@@ -67,7 +66,7 @@ func (c *Config) CreateDockerConfigJson(credentials []RegistryCredentials) ([]by
 
 	jsonBytes, err := json.Marshal(c)
 	if err != nil {
-		return nil, errors.Wrap(err, "failed to serialize docker config json")
+		return nil, errors.New("failed to serialize docker config json")
 	}
 
 	return jsonBytes, nil
@@ -77,15 +76,14 @@ func WriteDockerConfig(data []byte, path string) (string error) {
 	err := os.MkdirAll(path, 0600)
 	if err != nil {
 		if !os.IsExist(err) {
-			return errors.Wrap(err, fmt.Sprintf("failed to create %s directory", path))
+			return errors.New("failed to create %s directory")
 		}
 	}
 
 	filePath := path + "/config.json"
-	log.Printf("Config data is %s", data)
 	err = ioutil.WriteFile(filePath, data, 0644)
 	if err != nil {
-		return errors.Wrap(err, fmt.Sprintf("failed to create docker config file at %s", path))
+		return errors.New("failed to create docker config file at %s")
 	}
 	return nil
 }