addressed comments

* Add support for assume role to ECR

* fix errors

* fix UTs

* fix format

.drone.yml

@@ -4,7 +4,7 @@ name: default
 
 steps:
 - name: build
-  image: golang:1.17.2
+  image: golang:1.18
   commands:
   - go test ./...
   - sh scripts/build.sh
@@ -60,6 +60,74 @@ steps:
       exclude:
       - pull_request
 
+- name: acr
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko-acr
+    auto_tag: true
+    auto_tag_suffix: linux-amd64
+    daemon_off: false
+    dockerfile: docker/acr/Dockerfile.linux.amd64
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+      - pull_request
+
+- name: docker-kaniko-v1-8
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko
+    auto_tag: true
+    auto_tag_suffix: linux-amd64-kaniko1.8.1
+    daemon_off: false
+    dockerfile: docker/docker/Dockerfile.linux.amd64.kaniko1.8.1
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+      - pull_request
+
+- name: gcr-kaniko-v1-8
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko-gcr
+    auto_tag: true
+    auto_tag_suffix: linux-amd64-kaniko1.8.1
+    daemon_off: false
+    dockerfile: docker/gcr/Dockerfile.linux.amd64.kaniko1.8.1
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+      - pull_request
+
+
+- name: ecr-kaniko-v1-8
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko-ecr
+    auto_tag: true
+    auto_tag_suffix: linux-amd64-kaniko1.8.1
+    daemon_off: false
+    dockerfile: docker/ecr/Dockerfile.linux.amd64.kaniko1.8.1
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+      - pull_request
 ---
 kind: pipeline
 type: docker
@@ -94,6 +162,18 @@ steps:
     username:
       from_secret: docker_username
 
+- name: manifest-acr
+  pull: always
+  image: plugins/manifest
+  settings:
+    auto_tag: true
+    ignore_missing: true
+    password:
+      from_secret: docker_password
+    spec: docker/acr/manifest.tmpl
+    username:
+      from_secret: docker_username
+
 - name: manifest-ecr
   pull: always
   image: plugins/manifest
@@ -112,4 +192,58 @@ trigger:
   - "refs/tags/**"
 
 depends_on:
-- default
+- default
+
+---
+kind: pipeline
+type: docker
+name: notifications-docker-kaniko1-8
+
+platform:
+  os: linux
+  arch: amd64
+
+steps:
+- name: manifest-docker
+  pull: always
+  image: plugins/manifest
+  settings:
+    auto_tag: false
+    ignore_missing: true
+    password:
+      from_secret: docker_password
+    spec: docker/docker/manifest-kaniko1.8.1.tmpl
+    username:
+      from_secret: docker_username
+
+- name: manifest-gcr
+  pull: always
+  image: plugins/manifest
+  settings:
+    auto_tag: false
+    ignore_missing: true
+    password:
+      from_secret: docker_password
+    spec: docker/gcr/manifest-kaniko1.8.1.tmpl
+    username:
+      from_secret: docker_username
+
+- name: manifest-ecr
+  pull: always
+  image: plugins/manifest
+  settings:
+    auto_tag: false
+    ignore_missing: true
+    password:
+      from_secret: docker_password
+    spec: docker/ecr/manifest-kaniko1.8.1.tmpl
+    username:
+      from_secret: docker_username
+
+trigger:
+  ref:
+  - refs/heads/main
+  - "refs/tags/**"
+
+depends_on:
+- default

README.md

@@ -2,6 +2,8 @@
 
 Drone kaniko plugin uses [kaniko](https://github.com/GoogleContainerTools/kaniko) to build and publish Docker images to a container registry.
 
+Plugin images are published with 1.6.0 as well as 1.8.1 kaniko version from 1.5.1 release tag. `plugins/kaniko:<release-tag>` uses 1.6.0 version while `plugins/kaniko:<release-tag>-kaniko1.8.1` uses 1.8.1 version. Similar convention is used for plugins/kaniko-ecr & plugins/kaniko-gcr images as well.
+
 ## Build
 
 Build the binaries with the following commands:
@@ -39,6 +41,7 @@ docker build \
 ```
 
 ## Usage
+### Manual Tagging
 
 ```console
 docker run --rm \
@@ -52,14 +55,14 @@ docker run --rm \
     plugins/kaniko:linux-amd64
 ```
 
-### Automatic Tagging
+With expanded tagging enabled, semantic versions can be passed to PLUGIN_TAGS directly for expansion.
 
-With auto tagging enabled, semantic versions can be passed to PLUGIN_TAGS directly for expansion:
+**Note**: this feature only works for build labels. Artifact labels are not supported.
 
 ```console
 docker run --rm \
     -e PLUGIN_TAGS=v1.2.3,latest \
-    -e PLUGIN_AUTO_TAG=true \
+    -e PLUGIN_EXPAND_TAG=true \
     -v $(pwd):/drone \
     -w /drone \
     plugins/kaniko:linux-amd64
@@ -72,14 +75,58 @@ PLUGIN_TAGS=1,1.2,1.2.3,latest
 
 This allows for passing `$DRONE_TAG` directly as a tag for repos that use [semver](https://semver.org) tags.
 
-To avoid confusion between repo tags and image tags, `PLUGIN_AUTO_TAG` also recognizes a semantic version
+To avoid confusion between repo tags and image tags, `PLUGIN_EXPAND_TAG` also recognizes a semantic version
 without the `v` prefix.  As such, the following is also equivalent to the above:
 
 ```console
 docker run --rm \
     -e PLUGIN_TAGS=1.2.3,latest \
+    -e PLUGIN_EXPAND_TAG=true \
+    -v $(pwd):/drone \
+    -w /drone \
+    plugins/kaniko:linux-amd64
+```
+
+### Auto Tagging
+The [auto tag feature](https://plugins.drone.io/drone-plugins/drone-docker) of docker plugin is also supported.
+
+When auto tagging is enabled, if any of the case is matched below, a docker build will be pushed with auto generated tags. Otherwise the docker build will be skipped.
+
+**Note**: this feature only works for build labels. Artifact labels are not supported.
+
+#### Git Tag Push:
+
+```console
+docker run --rm \
+    -e DRONE_COMMIT_REF=refs/tags/v1.2.3 \
+    -e PLUGIN_REPO=foo/bar \
+    -e PLUGIN_USERNAME=foo \
+    -e PLUGIN_PASSWORD=bar \
     -e PLUGIN_AUTO_TAG=true \
     -v $(pwd):/drone \
     -w /drone \
     plugins/kaniko:linux-amd64
 ```
+
+Tags to push:
+- 1.2.3
+- 1.2
+- 1
+
+#### Git Commit Push in default branch:
+
+```console
+docker run --rm \
+    -e DRONE_COMMIT_REF=refs/heads/master \
+    -e DRONE_REPO_BRANCH=main \
+    -e PLUGIN_REPO=foo/bar \
+    -e PLUGIN_USERNAME=foo \
+    -e PLUGIN_PASSWORD=bar \
+    -e PLUGIN_AUTO_TAG=true \
+    -v $(pwd):/drone \
+    -w /drone \
+    plugins/kaniko:linux-amd64
+```
+
+Tags to push:
+- latest

cmd/kaniko-acr/main.go

@@ -0,0 +1,379 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"os"
+
+	"github.com/Azure/azure-sdk-for-go/sdk/azcore/policy"
+	"github.com/Azure/azure-sdk-for-go/sdk/azidentity"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+	"github.com/urfave/cli"
+
+	kaniko "github.com/drone/drone-kaniko"
+	"github.com/drone/drone-kaniko/pkg/artifact"
+	"github.com/drone/drone-kaniko/pkg/docker"
+)
+
+const (
+	dockerPath         string = "/kaniko/.docker"
+	clientIdEnv        string = "AZURE_CLIENT_ID"
+	clientSecretKeyEnv string = "AZURE_CLIENT_SECRET"
+	tenantKeyEnv       string = "AZURE_TENANT_ID"
+	certPathEnv        string = "AZURE_CLIENT_CERTIFICATE_PATH"
+	dockerConfigPath   string = "/kaniko/.docker/config.json"
+	defaultDigestFile  string = "/kaniko/digest-file"
+)
+
+var (
+	ACRCertPath   = "/kaniko/acr-cert.pem"
+	pluginVersion = "unknown"
+	username      = "00000000-0000-0000-0000-000000000000"
+)
+
+func main() {
+	// TODO Add the env file functionality
+	app := cli.NewApp()
+	app.Name = "kaniko docker plugin"
+	app.Usage = "kaniko docker plugin"
+	app.Action = run
+	app.Version = pluginVersion
+	app.Flags = []cli.Flag{
+		cli.StringFlag{
+			Name:   "dockerfile",
+			Usage:  "build dockerfile",
+			Value:  "Dockerfile",
+			EnvVar: "PLUGIN_DOCKERFILE",
+		},
+		cli.StringFlag{
+			Name:   "context",
+			Usage:  "build context",
+			Value:  ".",
+			EnvVar: "PLUGIN_CONTEXT",
+		},
+		cli.StringFlag{
+			Name:   "drone-commit-ref",
+			Usage:  "git commit ref passed by Drone",
+			EnvVar: "DRONE_COMMIT_REF",
+		},
+		cli.StringFlag{
+			Name:   "drone-repo-branch",
+			Usage:  "git repository default branch passed by Drone",
+			EnvVar: "DRONE_REPO_BRANCH",
+		},
+		cli.StringSliceFlag{
+			Name:     "tags",
+			Usage:    "build tags",
+			Value:    &cli.StringSlice{"latest"},
+			EnvVar:   "PLUGIN_TAGS",
+			FilePath: ".tags",
+		},
+		cli.BoolFlag{
+			Name:   "expand-tag",
+			Usage:  "enable for semver tagging",
+			EnvVar: "PLUGIN_EXPAND_TAG",
+		},
+		cli.BoolFlag{
+			Name:   "auto-tag",
+			Usage:  "enable auto generation of build tags",
+			EnvVar: "PLUGIN_AUTO_TAG",
+		},
+		cli.StringFlag{
+			Name:   "auto-tag-suffix",
+			Usage:  "the suffix of auto build tags",
+			EnvVar: "PLUGIN_AUTO_TAG_SUFFIX",
+		},
+		cli.StringSliceFlag{
+			Name:   "args",
+			Usage:  "build args",
+			EnvVar: "PLUGIN_BUILD_ARGS",
+		},
+		cli.StringFlag{
+			Name:   "target",
+			Usage:  "build target",
+			EnvVar: "PLUGIN_TARGET",
+		},
+		cli.StringFlag{
+			Name:   "repo",
+			Usage:  "docker repository",
+			EnvVar: "PLUGIN_REPO",
+		},
+		cli.BoolFlag{
+			Name:   "create-repository",
+			Usage:  "create ACR repository",
+			EnvVar: "PLUGIN_CREATE_REPOSITORY",
+		},
+		cli.StringSliceFlag{
+			Name:   "custom-labels",
+			Usage:  "additional k=v labels",
+			EnvVar: "PLUGIN_CUSTOM_LABELS",
+		},
+		cli.StringFlag{
+			Name:   "registry",
+			Usage:  "ACR registry",
+			EnvVar: "PLUGIN_REGISTRY",
+		},
+		cli.StringSliceFlag{
+			Name:   "registry-mirrors",
+			Usage:  "docker registry mirrors",
+			EnvVar: "PLUGIN_REGISTRY_MIRRORS",
+		},
+		cli.StringFlag{
+			Name:   "client-secret",
+			Usage:  "Azure client secret",
+			EnvVar: "CLIENT_SECRET",
+		},
+		cli.StringFlag{
+			Name:   "client-cert",
+			Usage:  "Azure client certificate",
+			EnvVar: "CLIENT_CERTIFICATE",
+		},
+		cli.StringFlag{
+			Name:   "tenant-id",
+			Usage:  "Azure Tenant Id",
+			EnvVar: "TENANT_ID",
+		},
+		cli.StringFlag{
+			Name:   "client-id",
+			Usage:  "Azure Client Id",
+			EnvVar: "CLIENT_ID",
+		},
+		cli.StringFlag{
+			Name:   "snapshot-mode",
+			Usage:  "Specify one of full, redo or time as snapshot mode",
+			EnvVar: "PLUGIN_SNAPSHOT_MODE",
+		},
+		cli.StringFlag{
+			Name:   "lifecycle-policy",
+			Usage:  "Path to lifecycle policy file",
+			EnvVar: "PLUGIN_LIFECYCLE_POLICY",
+		},
+		cli.StringFlag{
+			Name:   "repository-policy",
+			Usage:  "Path to repository policy file",
+			EnvVar: "PLUGIN_REPOSITORY_POLICY",
+		},
+		cli.BoolFlag{
+			Name:   "enable-cache",
+			Usage:  "Set this flag to opt into caching with kaniko",
+			EnvVar: "PLUGIN_ENABLE_CACHE",
+		},
+		cli.StringFlag{
+			Name:   "cache-repo",
+			Usage:  "Remote repository that will be used to store cached layers. Cache repo should be present in specified registry. enable-cache needs to be set to use this flag",
+			EnvVar: "PLUGIN_CACHE_REPO",
+		},
+		cli.IntFlag{
+			Name:   "cache-ttl",
+			Usage:  "Cache timeout in hours. Defaults to two weeks.",
+			EnvVar: "PLUGIN_CACHE_TTL",
+		},
+		cli.StringFlag{
+			Name:   "artifact-file",
+			Usage:  "Artifact file location that will be generated by the plugin. This file will include information of docker images that are uploaded by the plugin.",
+			EnvVar: "PLUGIN_ARTIFACT_FILE",
+		},
+		cli.BoolFlag{
+			Name:   "no-push",
+			Usage:  "Set this flag if you only want to build the image, without pushing to a registry",
+			EnvVar: "PLUGIN_NO_PUSH",
+		},
+		cli.StringFlag{
+			Name:   "verbosity",
+			Usage:  "Set this flag with value as oneof <panic|fatal|error|warn|info|debug|trace> to set the logging level for kaniko. Defaults to info.",
+			EnvVar: "PLUGIN_VERBOSITY",
+		},
+		cli.StringFlag{
+			Name:   "platform",
+			Usage:  "Allows to build with another default platform than the host, similarly to docker build --platform",
+			EnvVar: "PLUGIN_PLATFORM",
+		},
+		cli.BoolFlag{
+			Name:   "skip-unused-stages",
+			Usage:  "build only used stages",
+			EnvVar: "PLUGIN_SKIP_UNUSED_STAGES",
+		},
+	}
+
+	if err := app.Run(os.Args); err != nil {
+		logrus.Fatal(err)
+	}
+}
+
+func run(c *cli.Context) error {
+	registry := c.String("registry")
+	noPush := c.Bool("no-push")
+
+	err := createDockerConfig(
+		c.String("tenant-id"),
+		c.String("client-id"),
+		c.String("client-cert"),
+		c.String("client-secret"),
+		registry,
+		noPush,
+	)
+	if err != nil {
+		return err
+	}
+
+	plugin := kaniko.Plugin{
+		Build: kaniko.Build{
+			DroneCommitRef:   c.String("drone-commit-ref"),
+			DroneRepoBranch:  c.String("drone-repo-branch"),
+			Dockerfile:       c.String("dockerfile"),
+			Context:          c.String("context"),
+			Tags:             c.StringSlice("tags"),
+			AutoTag:          c.Bool("auto-tag"),
+			AutoTagSuffix:    c.String("auto-tag-suffix"),
+			ExpandTag:        c.Bool("expand-tag"),
+			Args:             c.StringSlice("args"),
+			Target:           c.String("target"),
+			Repo:             c.String("repo"),
+			Mirrors:          c.StringSlice("registry-mirrors"),
+			Labels:           c.StringSlice("custom-labels"),
+			SnapshotMode:     c.String("snapshot-mode"),
+			EnableCache:      c.Bool("enable-cache"),
+			CacheRepo:        fmt.Sprintf("%s/%s", c.String("registry"), c.String("cache-repo")),
+			CacheTTL:         c.Int("cache-ttl"),
+			DigestFile:       defaultDigestFile,
+			NoPush:           noPush,
+			Verbosity:        c.String("verbosity"),
+			Platform:         c.String("platform"),
+			SkipUnusedStages: c.Bool("skip-unused-stages"),
+		},
+		Artifact: kaniko.Artifact{
+			Tags:         c.StringSlice("tags"),
+			Repo:         c.String("repo"),
+			Registry:     c.String("registry"),
+			ArtifactFile: c.String("artifact-file"),
+			RegistryType: artifact.Docker,
+		},
+	}
+	return plugin.Exec()
+}
+
+func createDockerConfig(tenantId, clientId, cert,
+	clientSecret, registry string, noPush bool) error {
+	if registry == "" {
+		return fmt.Errorf("registry must be specified")
+	}
+
+	if noPush {
+		return nil
+	}
+
+	// case of client secret or cert based auth
+	if clientId != "" {
+		// only setup auth when pushing or credentials are defined
+
+		token, err := getACRToken(tenantId, clientId, clientSecret, cert, registry)
+		if err != nil {
+			return errors.Wrap(err, "failed to fetch ACR Token")
+		}
+		err = docker.CreateDockerCfgFile(username, token, registry, dockerConfigPath)
+		if err != nil {
+			return errors.Wrap(err, "failed to create docker config")
+		}
+	} else {
+		return fmt.Errorf("managed authentication is not supported")
+	}
+
+	return nil
+}
+
+func getACRToken(tenantId, clientId, clientSecret, cert, registry string) (string, error) {
+	if tenantId == "" {
+		return "", fmt.Errorf("tenantId can't be empty for AAD authentication")
+	}
+
+	if clientId == "" {
+		return "", fmt.Errorf("clientId can't be empty for AAD authentication")
+	}
+
+	if clientSecret == "" && cert == "" {
+		return "", fmt.Errorf("one of client secert or cert should be defined")
+	}
+
+	// in case of authentication via cert
+	if cert != "" {
+		err := setupACRCert(cert)
+		if err != nil {
+			errors.Wrap(err, "failed to push setup cert file")
+		}
+	}
+
+	// TODO check for presence of file as well.
+	os.Setenv(clientIdEnv, clientId)
+	os.Setenv(clientSecretKeyEnv, clientSecret)
+	os.Setenv(tenantKeyEnv, tenantId)
+	env, err := azidentity.NewEnvironmentCredential(nil)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to get env credentials from azure")
+	}
+
+	policy := policy.TokenRequestOptions{
+		Scopes: []string{"https://management.azure.com/.default"},
+	}
+	os.Unsetenv(clientIdEnv)
+	os.Unsetenv(clientSecretKeyEnv)
+	os.Unsetenv(tenantKeyEnv)
+	os.Unsetenv(certPathEnv)
+
+	azToken, err := env.GetToken(context.Background(), policy)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to fetch access token")
+	}
+
+	ACRToken, err := fetchACRToken(tenantId, azToken.Token, registry)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to fetch ACR token")
+	}
+	return ACRToken, nil
+}
+
+func fetchACRToken(tenantId, token, registry string) (string, error) {
+	formData := url.Values{
+		"grant_type":   {"access_token"},
+		"service":      {registry},
+		"tenant":       {tenantId},
+		"access_token": {token},
+	}
+	jsonResponse, err := http.PostForm(fmt.Sprintf("https://%s/oauth2/exchange", registry), formData)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to fetch ACR token")
+	}
+	var response map[string]interface{}
+	err = json.NewDecoder(jsonResponse.Body).Decode(&response)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to decode oauth exchange response")
+	}
+
+	if x, found := response["refresh_token"]; found {
+		s, ok := x.(string)
+		if !ok {
+			errors.New("failed to cast refresh token from acr")
+		} else {
+			return s, nil
+		}
+	} else {
+		return "", errors.Wrap(err, "refresh token not found in response of oauth exchange call")
+	}
+	return "", errors.New("failed to get refresh token from acr")
+}
+
+func setupACRCert(jsonKey string) error {
+	err := ioutil.WriteFile(ACRCertPath, []byte(jsonKey), 0644)
+	if err != nil {
+		return errors.Wrap(err, "failed to write ACR certificate")
+	}
+	err = os.Setenv(certPathEnv, ACRCertPath)
+	if err != nil {
+		return errors.Wrap(err, fmt.Sprintf("failed to set %s environment variable", certPathEnv))
+	}
+	return nil
+}

cmd/kaniko-docker/main.go

@@ -58,6 +58,16 @@ func main() {
 			Value:  ".",
 			EnvVar: "PLUGIN_CONTEXT",
 		},
+		cli.StringFlag{
+			Name:   "drone-commit-ref",
+			Usage:  "git commit ref passed by Drone",
+			EnvVar: "DRONE_COMMIT_REF",
+		},
+		cli.StringFlag{
+			Name:   "drone-repo-branch",
+			Usage:  "git repository default branch passed by Drone",
+			EnvVar: "DRONE_REPO_BRANCH",
+		},
 		cli.StringSliceFlag{
 			Name:     "tags",
 			Usage:    "build tags",
@@ -66,10 +76,25 @@ func main() {
 			FilePath: ".tags",
 		},
 		cli.BoolFlag{
-			Name:   "auto_tag",
+			Name:   "expand-repo",
+			Usage:  "Prepends the registry url to the repo if registry url is not specified in repo name",
+			EnvVar: "PLUGIN_EXPAND_REPO",
+		},
+		cli.BoolFlag{
+			Name:   "expand-tag",
 			Usage:  "enable for semver tagging",
+			EnvVar: "PLUGIN_EXPAND_TAG",
+		},
+		cli.BoolFlag{
+			Name:   "auto-tag",
+			Usage:  "enable auto generation of build tags",
 			EnvVar: "PLUGIN_AUTO_TAG",
 		},
+		cli.StringFlag{
+			Name:   "auto-tag-suffix",
+			Usage:  "the suffix of auto build tags",
+			EnvVar: "PLUGIN_AUTO_TAG_SUFFIX",
+		},
 		cli.StringSliceFlag{
 			Name:   "args",
 			Usage:  "build args",
@@ -96,6 +121,11 @@ func main() {
 			Value:  v1RegistryURL,
 			EnvVar: "PLUGIN_REGISTRY",
 		},
+		cli.StringSliceFlag{
+			Name:   "registry-mirrors",
+			Usage:  "docker registry mirrors",
+			EnvVar: "PLUGIN_REGISTRY_MIRRORS",
+		},
 		cli.StringFlag{
 			Name:   "username",
 			Usage:  "docker username",
@@ -151,6 +181,11 @@ func main() {
 			Usage:  "Allows to build with another default platform than the host, similarly to docker build --platform",
 			EnvVar: "PLUGIN_PLATFORM",
 		},
+		cli.BoolFlag{
+			Name:   "skip-unused-stages",
+			Usage:  "build only used stages",
+			EnvVar: "PLUGIN_SKIP_UNUSED_STAGES",
+		},
 	}
 
 	if err := app.Run(os.Args); err != nil {
@@ -171,27 +206,33 @@ func run(c *cli.Context) error {
 
 	plugin := kaniko.Plugin{
 		Build: kaniko.Build{
-			Dockerfile:    c.String("dockerfile"),
-			Context:       c.String("context"),
-			Tags:          c.StringSlice("tags"),
-			AutoTag:       c.Bool("auto_tag"),
-			Args:          c.StringSlice("args"),
-			Target:        c.String("target"),
-			Repo:          c.String("repo"),
-			Labels:        c.StringSlice("custom-labels"),
-			SkipTlsVerify: c.Bool("skip-tls-verify"),
-			SnapshotMode:  c.String("snapshot-mode"),
-			EnableCache:   c.Bool("enable-cache"),
-			CacheRepo:     c.String("cache-repo"),
-			CacheTTL:      c.Int("cache-ttl"),
-			DigestFile:    defaultDigestFile,
-			NoPush:        noPush,
-			Verbosity:     c.String("verbosity"),
-			Platform:      c.String("platform"),
+			DroneCommitRef:   c.String("drone-commit-ref"),
+			DroneRepoBranch:  c.String("drone-repo-branch"),
+			Dockerfile:       c.String("dockerfile"),
+			Context:          c.String("context"),
+			Tags:             c.StringSlice("tags"),
+			AutoTag:          c.Bool("auto-tag"),
+			AutoTagSuffix:    c.String("auto-tag-suffix"),
+			ExpandTag:        c.Bool("expand-tag"),
+			Args:             c.StringSlice("args"),
+			Target:           c.String("target"),
+			Repo:             buildRepo(c.String("registry"), c.String("repo"), c.Bool("expand-repo")),
+			Mirrors:          c.StringSlice("registry-mirrors"),
+			Labels:           c.StringSlice("custom-labels"),
+			SkipTlsVerify:    c.Bool("skip-tls-verify"),
+			SnapshotMode:     c.String("snapshot-mode"),
+			EnableCache:      c.Bool("enable-cache"),
+			CacheRepo:        buildRepo(c.String("registry"), c.String("cache-repo"), c.Bool("expand-repo")),
+			CacheTTL:         c.Int("cache-ttl"),
+			DigestFile:       defaultDigestFile,
+			NoPush:           noPush,
+			Verbosity:        c.String("verbosity"),
+			Platform:         c.String("platform"),
+			SkipUnusedStages: c.Bool("skip-unused-stages"),
 		},
 		Artifact: kaniko.Artifact{
 			Tags:         c.StringSlice("tags"),
-			Repo:         buildRepo(c.String("registry"), c.String("repo")),
+			Repo:         buildRepo(c.String("registry"), c.String("repo"), c.Bool("expand-repo")),
 			Registry:     c.String("registry"),
 			ArtifactFile: c.String("artifact-file"),
 			RegistryType: artifact.Docker,
@@ -233,12 +274,14 @@ func createDockerCfgFile(username, password, registry string) error {
 	return nil
 }
 
-func buildRepo(registry, repo string) string {
-	if registry == "" {
+func buildRepo(registry, repo string, expandRepo bool) string {
+	if !expandRepo || registry == "" || registry == v1RegistryURL {
 		// No custom registry, just return the repo name
 		return repo
 	}
-	if strings.HasPrefix(repo, registry + "/") {
+	// Trim off trailing slash to prevent double slash when combining with repo
+	registry = strings.TrimSuffix(registry, "/")
+	if strings.HasPrefix(repo, registry+"/") {
 		// Repo already includes the registry prefix
 		// For backward compatibility, we won't add the prefix again.
 		return repo

cmd/kaniko-docker/main_test.go

@@ -29,7 +29,7 @@ func Test_buildRepo(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			if got := buildRepo(tt.registry, tt.repo); got != tt.want {
+			if got := buildRepo(tt.registry, tt.repo, true); got != tt.want {
 				t.Errorf("buildRepo(%q, %q) = %v, want %v", tt.registry, tt.repo, got, tt.want)
 			}
 		})

cmd/kaniko-ecr/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"encoding/base64"
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
@@ -12,14 +13,20 @@ import (
 	"github.com/aws/aws-sdk-go-v2/config"
 	"github.com/aws/aws-sdk-go-v2/service/ecr"
 	"github.com/aws/aws-sdk-go-v2/service/ecrpublic"
+	awsv1 "github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/credentials/stscreds"
+	"github.com/aws/aws-sdk-go/aws/session"
+	ecrv1 "github.com/aws/aws-sdk-go/service/ecr"
 	"github.com/aws/smithy-go"
-	kaniko "github.com/drone/drone-kaniko"
-	"github.com/drone/drone-kaniko/pkg/artifact"
-	"github.com/drone/drone-kaniko/pkg/docker"
+	"github.com/hashicorp/go-version"
 	"github.com/joho/godotenv"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
+
+	kaniko "github.com/drone/drone-kaniko"
+	"github.com/drone/drone-kaniko/pkg/artifact"
+	"github.com/drone/drone-kaniko/pkg/docker"
 )
 
 const (
@@ -27,12 +34,14 @@ const (
 	secretKeyEnv     string = "AWS_SECRET_ACCESS_KEY"
 	dockerConfigPath string = "/kaniko/.docker/config.json"
 	ecrPublicDomain  string = "public.ecr.aws"
+	kanikoVersionEnv string = "KANIKO_VERSION"
 
-	defaultDigestFile string = "/kaniko/digest-file"
+	oneDotEightVersion string = "1.8.0"
+	defaultDigestFile  string = "/kaniko/digest-file"
 )
 
 var (
-	version = "unknown"
+	pluginVersion = "unknown"
 )
 
 func main() {
@@ -47,7 +56,7 @@ func main() {
 	app.Name = "kaniko docker plugin"
 	app.Usage = "kaniko docker plugin"
 	app.Action = run
-	app.Version = version
+	app.Version = pluginVersion
 	app.Flags = []cli.Flag{
 		cli.StringFlag{
 			Name:   "dockerfile",
@@ -71,6 +80,16 @@ func main() {
 			Value:  ".",
 			EnvVar: "PLUGIN_CONTEXT",
 		},
+		cli.StringFlag{
+			Name:   "drone-commit-ref",
+			Usage:  "git commit ref passed by Drone",
+			EnvVar: "DRONE_COMMIT_REF",
+		},
+		cli.StringFlag{
+			Name:   "drone-repo-branch",
+			Usage:  "git repository default branch passed by Drone",
+			EnvVar: "DRONE_REPO_BRANCH",
+		},
 		cli.StringSliceFlag{
 			Name:     "tags",
 			Usage:    "build tags",
@@ -79,10 +98,20 @@ func main() {
 			FilePath: ".tags",
 		},
 		cli.BoolFlag{
-			Name:   "auto_tag",
+			Name:   "expand-tag",
 			Usage:  "enable for semver tagging",
+			EnvVar: "PLUGIN_EXPAND_TAG",
+		},
+		cli.BoolFlag{
+			Name:   "auto-tag",
+			Usage:  "enable auto generation of build tags",
 			EnvVar: "PLUGIN_AUTO_TAG",
 		},
+		cli.StringFlag{
+			Name:   "auto-tag-suffix",
+			Usage:  "the suffix of auto build tags",
+			EnvVar: "PLUGIN_AUTO_TAG_SUFFIX",
+		},
 		cli.StringSliceFlag{
 			Name:   "args",
 			Usage:  "build args",
@@ -119,6 +148,11 @@ func main() {
 			Usage:  "ECR registry",
 			EnvVar: "PLUGIN_REGISTRY",
 		},
+		cli.StringSliceFlag{
+			Name:   "registry-mirrors",
+			Usage:  "docker registry mirrors",
+			EnvVar: "PLUGIN_REGISTRY_MIRRORS",
+		},
 		cli.StringFlag{
 			Name:   "access-key",
 			Usage:  "ECR access key",
@@ -129,6 +163,16 @@ func main() {
 			Usage:  "ECR secret key",
 			EnvVar: "PLUGIN_SECRET_KEY",
 		},
+		cli.StringFlag{
+			Name:   "assume-role",
+			Usage:  "Assume a role",
+			EnvVar: "PLUGIN_ASSUME_ROLE",
+		},
+		cli.StringFlag{
+			Name:   "external-id",
+			Usage:  "Used along with assume role to assume a role",
+			EnvVar: "PLUGIN_EXTERNAL_ID",
+		},
 		cli.StringFlag{
 			Name:   "snapshot-mode",
 			Usage:  "Specify one of full, redo or time as snapshot mode",
@@ -179,6 +223,11 @@ func main() {
 			Usage:  "Allows to build with another default platform than the host, similarly to docker build --platform",
 			EnvVar: "PLUGIN_PLATFORM",
 		},
+		cli.BoolFlag{
+			Name:   "skip-unused-stages",
+			Usage:  "build only used stages",
+			EnvVar: "PLUGIN_SKIP_UNUSED_STAGES",
+		},
 	}
 
 	if err := app.Run(os.Args); err != nil {
@@ -198,6 +247,9 @@ func run(c *cli.Context) error {
 		c.String("access-key"),
 		c.String("secret-key"),
 		registry,
+		c.String("assume-role"),
+		c.String("external-id"),
+		region,
 		noPush,
 	)
 	if err != nil {
@@ -242,22 +294,28 @@ func run(c *cli.Context) error {
 
 	plugin := kaniko.Plugin{
 		Build: kaniko.Build{
-			Dockerfile:   c.String("dockerfile"),
-			Context:      c.String("context"),
-			Tags:         c.StringSlice("tags"),
-			AutoTag:      c.Bool("auto_tag"),
-			Args:         c.StringSlice("args"),
-			Target:       c.String("target"),
-			Repo:         fmt.Sprintf("%s/%s", c.String("registry"), c.String("repo")),
-			Labels:       c.StringSlice("custom-labels"),
-			SnapshotMode: c.String("snapshot-mode"),
-			EnableCache:  c.Bool("enable-cache"),
-			CacheRepo:    fmt.Sprintf("%s/%s", c.String("registry"), c.String("cache-repo")),
-			CacheTTL:     c.Int("cache-ttl"),
-			DigestFile:   defaultDigestFile,
-			NoPush:       noPush,
-			Verbosity:    c.String("verbosity"),
-			Platform:     c.String("platform"),
+			DroneCommitRef:   c.String("drone-commit-ref"),
+			DroneRepoBranch:  c.String("drone-repo-branch"),
+			Dockerfile:       c.String("dockerfile"),
+			Context:          c.String("context"),
+			Tags:             c.StringSlice("tags"),
+			AutoTag:          c.Bool("auto-tag"),
+			AutoTagSuffix:    c.String("auto-tag-suffix"),
+			ExpandTag:        c.Bool("expand-tag"),
+			Args:             c.StringSlice("args"),
+			Target:           c.String("target"),
+			Repo:             fmt.Sprintf("%s/%s", c.String("registry"), c.String("repo")),
+			Mirrors:          c.StringSlice("registry-mirrors"),
+			Labels:           c.StringSlice("custom-labels"),
+			SnapshotMode:     c.String("snapshot-mode"),
+			EnableCache:      c.Bool("enable-cache"),
+			CacheRepo:        fmt.Sprintf("%s/%s", c.String("registry"), c.String("cache-repo")),
+			CacheTTL:         c.Int("cache-ttl"),
+			DigestFile:       defaultDigestFile,
+			NoPush:           noPush,
+			Verbosity:        c.String("verbosity"),
+			Platform:         c.String("platform"),
+			SkipUnusedStages: c.Bool("skip-unused-stages"),
 		},
 		Artifact: kaniko.Artifact{
 			Tags:         c.StringSlice("tags"),
@@ -270,15 +328,23 @@ func run(c *cli.Context) error {
 	return plugin.Exec()
 }
 
-func createDockerConfig(dockerUsername, dockerPassword, accessKey, secretKey, registry string, noPush bool) (*docker.Config, error) {
+func createDockerConfig(dockerUsername, dockerPassword, accessKey, secretKey,
+	registry, assumeRole, externalId, region string, noPush bool) (*docker.Config, error) {
 	dockerConfig := docker.NewConfig()
 
 	if dockerUsername != "" {
 		dockerConfig.SetAuth(docker.RegistryV1, dockerUsername, dockerPassword)
 	}
 
-	// only setup auth when pushing or credentials are defined
-	if !noPush || accessKey != "" {
+	if assumeRole != "" {
+		var err error
+		username, password, registry, err := getAssumeRoleCreds(region, assumeRole, externalId, "")
+		if err != nil {
+			return nil, err
+		}
+		dockerConfig.SetAuth(registry, username, password)
+	} else if !noPush || accessKey != "" {
+		// only setup auth when pushing or credentials are defined
 		if registry == "" {
 			return nil, fmt.Errorf("registry must be specified")
 		}
@@ -296,8 +362,12 @@ func createDockerConfig(dockerUsername, dockerPassword, accessKey, secretKey, re
 			}
 		}
 
-		dockerConfig.SetCredHelper(ecrPublicDomain, "ecr-login")
-		dockerConfig.SetCredHelper(registry, "ecr-login")
+		// kaniko-executor >=1.8.0 does not require additional cred helper logic for ECR,
+		// as it discovers ECR repositories automatically and acts accordingly.
+		if isKanikoVersionBelowOneDotEight(os.Getenv(kanikoVersionEnv)) {
+			dockerConfig.SetCredHelper(ecrPublicDomain, "ecr-login")
+			dockerConfig.SetCredHelper(registry, "ecr-login")
+		}
 	}
 
 	return dockerConfig, nil
@@ -383,6 +453,63 @@ func uploadRepositoryPolicy(region, repo, registry, repositoryPolicy string) (er
 	return err
 }
 
+func getAssumeRoleCreds(region, roleArn, externalId, roleSessionName string) (string, string, string, error) {
+	sess, err := session.NewSession(&awsv1.Config{Region: &region})
+	if err != nil {
+		return "", "", "", errors.Wrap(err, "failed to create aws session")
+	}
+
+	svc := ecrv1.New(sess, &awsv1.Config{
+		Credentials: stscreds.NewCredentials(sess, roleArn, func(p *stscreds.AssumeRoleProvider) {
+			if externalId != "" {
+				p.ExternalID = &externalId
+			}
+		}),
+	})
+
+	username, password, registry, err := getAuthInfo(svc)
+	if err != nil {
+		return "", "", "", errors.Wrap(err, "failed to get ECR auth")
+	}
+	return username, password, registry, nil
+}
+
+func getAuthInfo(svc *ecrv1.ECR) (username, password, registry string, err error) {
+	var result *ecrv1.GetAuthorizationTokenOutput
+	var decoded []byte
+
+	result, err = svc.GetAuthorizationToken(&ecrv1.GetAuthorizationTokenInput{})
+	if err != nil {
+		return
+	}
+
+	auth := result.AuthorizationData[0]
+	token := *auth.AuthorizationToken
+	decoded, err = base64.StdEncoding.DecodeString(token)
+	if err != nil {
+		return
+	}
+
+	registry = strings.TrimPrefix(*auth.ProxyEndpoint, "https://")
+	creds := strings.Split(string(decoded), ":")
+	username = creds[0]
+	password = creds[1]
+	return
+}
+
 func isRegistryPublic(registry string) bool {
 	return strings.HasPrefix(registry, ecrPublicDomain)
 }
+
+func isKanikoVersionBelowOneDotEight(v string) bool {
+	currVer, err := version.NewVersion(v)
+	if err != nil {
+		return true
+	}
+	oneEightVer, err := version.NewVersion(oneDotEightVersion)
+	if err != nil {
+		return true
+	}
+
+	return currVer.LessThan(oneEightVer)
+}

cmd/kaniko-ecr/main_test.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"os"
 	"reflect"
 	"testing"
 
@@ -14,6 +15,9 @@ func TestCreateDockerConfig(t *testing.T) {
 		"access-key",
 		"secret-key",
 		"ecr-registry",
+		"",
+		"",
+		"",
 		false,
 	)
 	if err != nil {
@@ -29,3 +33,69 @@ func TestCreateDockerConfig(t *testing.T) {
 		t.Errorf("not equal:\n  want: %#v\n   got: %#v", want, got)
 	}
 }
+
+func TestCreateDockerConfigKanikoOneDotEight(t *testing.T) {
+	os.Setenv(kanikoVersionEnv, "1.8.1")
+	defer os.Setenv(kanikoVersionEnv, "")
+	got, err := createDockerConfig(
+		"docker-username",
+		"docker-password",
+		"access-key",
+		"secret-key",
+		"ecr-registry",
+		"",
+		"",
+		"",
+		false,
+	)
+	if err != nil {
+		t.Error("failed to create docker config")
+	}
+
+	want := docker.NewConfig()
+	want.SetAuth(docker.RegistryV1, "docker-username", "docker-password")
+
+	if !reflect.DeepEqual(want, got) {
+		t.Errorf("not equal:\n  want: %#v\n   got: %#v", want, got)
+	}
+}
+
+func TestVersionComparison(t *testing.T) {
+	tests := []struct {
+		title    string
+		version  string
+		expected bool
+	}{
+		{
+			title:    "Kaniko 1.6.0 version",
+			version:  "1.6.0",
+			expected: true,
+		},
+		{
+			title:    "Kaniko 1.8.0 version",
+			version:  "1.8.0",
+			expected: false,
+		},
+		{
+			title:    "Kaniko 1.8.1 version",
+			version:  "1.8.1",
+			expected: false,
+		},
+		{
+			title:    "Empty kaniko version",
+			version:  "",
+			expected: true,
+		},
+		{
+			title:    "Kaniko version 1.10.0",
+			version:  "1.10.0",
+			expected: false,
+		},
+	}
+	for _, test := range tests {
+		got := isKanikoVersionBelowOneDotEight(test.version)
+		if got != test.expected {
+			t.Fatalf("test name: %s, expected: %v, got: %v", test.title, test.expected, got)
+		}
+	}
+}

cmd/kaniko-gcr/main.go

@@ -52,6 +52,16 @@ func main() {
 			Value:  ".",
 			EnvVar: "PLUGIN_CONTEXT",
 		},
+		cli.StringFlag{
+			Name:   "drone-commit-ref",
+			Usage:  "git commit ref passed by Drone",
+			EnvVar: "DRONE_COMMIT_REF",
+		},
+		cli.StringFlag{
+			Name:   "drone-repo-branch",
+			Usage:  "git repository default branch passed by Drone",
+			EnvVar: "DRONE_REPO_BRANCH",
+		},
 		cli.StringSliceFlag{
 			Name:     "tags",
 			Usage:    "build tags",
@@ -60,10 +70,20 @@ func main() {
 			FilePath: ".tags",
 		},
 		cli.BoolFlag{
-			Name:   "auto_tag",
+			Name:   "expand-tag",
 			Usage:  "enable for semver tagging",
+			EnvVar: "PLUGIN_EXPAND_TAG",
+		},
+		cli.BoolFlag{
+			Name:   "auto-tag",
+			Usage:  "enable auto generation of build tags",
 			EnvVar: "PLUGIN_AUTO_TAG",
 		},
+		cli.StringFlag{
+			Name:   "auto-tag-suffix",
+			Usage:  "the suffix of auto build tags",
+			EnvVar: "PLUGIN_AUTO_TAG_SUFFIX",
+		},
 		cli.StringSliceFlag{
 			Name:   "args",
 			Usage:  "build args",
@@ -90,6 +110,11 @@ func main() {
 			Value:  "gcr.io",
 			EnvVar: "PLUGIN_REGISTRY",
 		},
+		cli.StringSliceFlag{
+			Name:   "registry-mirrors",
+			Usage:  "docker registry mirrors",
+			EnvVar: "PLUGIN_REGISTRY_MIRRORS",
+		},
 		cli.StringFlag{
 			Name:   "json-key",
 			Usage:  "docker username",
@@ -135,6 +160,11 @@ func main() {
 			Usage:  "Allows to build with another default platform than the host, similarly to docker build --platform",
 			EnvVar: "PLUGIN_PLATFORM",
 		},
+		cli.BoolFlag{
+			Name:   "skip-unused-stages",
+			Usage:  "build only used stages",
+			EnvVar: "PLUGIN_SKIP_UNUSED_STAGES",
+		},
 	}
 
 	if err := app.Run(os.Args); err != nil {
@@ -157,22 +187,28 @@ func run(c *cli.Context) error {
 
 	plugin := kaniko.Plugin{
 		Build: kaniko.Build{
-			Dockerfile:   c.String("dockerfile"),
-			Context:      c.String("context"),
-			Tags:         c.StringSlice("tags"),
-			AutoTag:      c.Bool("auto_tag"),
-			Args:         c.StringSlice("args"),
-			Target:       c.String("target"),
-			Repo:         fmt.Sprintf("%s/%s", c.String("registry"), c.String("repo")),
-			Labels:       c.StringSlice("custom-labels"),
-			SnapshotMode: c.String("snapshot-mode"),
-			EnableCache:  c.Bool("enable-cache"),
-			CacheRepo:    fmt.Sprintf("%s/%s", c.String("registry"), c.String("cache-repo")),
-			CacheTTL:     c.Int("cache-ttl"),
-			DigestFile:   defaultDigestFile,
-			NoPush:       noPush,
-			Verbosity:    c.String("verbosity"),
-			Platform:     c.String("platform"),
+			DroneCommitRef:   c.String("drone-commit-ref"),
+			DroneRepoBranch:  c.String("drone-repo-branch"),
+			Dockerfile:       c.String("dockerfile"),
+			Context:          c.String("context"),
+			Tags:             c.StringSlice("tags"),
+			AutoTag:          c.Bool("auto-tag"),
+			AutoTagSuffix:    c.String("auto-tag-suffix"),
+			ExpandTag:        c.Bool("expand-tag"),
+			Args:             c.StringSlice("args"),
+			Target:           c.String("target"),
+			Repo:             fmt.Sprintf("%s/%s", c.String("registry"), c.String("repo")),
+			Mirrors:          c.StringSlice("registry-mirrors"),
+			Labels:           c.StringSlice("custom-labels"),
+			SnapshotMode:     c.String("snapshot-mode"),
+			EnableCache:      c.Bool("enable-cache"),
+			CacheRepo:        fmt.Sprintf("%s/%s", c.String("registry"), c.String("cache-repo")),
+			CacheTTL:         c.Int("cache-ttl"),
+			DigestFile:       defaultDigestFile,
+			NoPush:           noPush,
+			Verbosity:        c.String("verbosity"),
+			Platform:         c.String("platform"),
+			SkipUnusedStages: c.Bool("skip-unused-stages"),
 		},
 		Artifact: kaniko.Artifact{
 			Tags:         c.StringSlice("tags"),

docker/acr/Dockerfile.linux.amd64

@@ -0,0 +1,5 @@
+FROM gcr.io/kaniko-project/executor
+
+ENV KANIKO_VERSION=1.8.1
+ADD release/linux/amd64/kaniko-acr /kaniko/
+ENTRYPOINT ["/kaniko/kaniko-acr"]

docker/acr/Dockerfile.linux.arm64

@@ -0,0 +1,8 @@
+FROM gcr.io/kaniko-project/executor:arm64-v1.8.1
+
+ENV HOME /root
+ENV USER root
+
+ENV KANIKO_VERSION=1.8.1
+ADD release/linux/arm64/kaniko-acr /kaniko/
+ENTRYPOINT ["/kaniko/kaniko-acr"]

docker/acr/manifest.tmpl

@@ -0,0 +1,13 @@
+image: plugins/kaniko:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}latest{{/if}}
+{{#if build.tags}}
+tags:
+{{#each build.tags}}
+  - {{this}}
+{{/each}}
+{{/if}}
+manifests:
+  -
+    image: plugins/kaniko:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64
+    platform:
+      architecture: amd64
+      os: linux

docker/docker/Dockerfile.linux.amd64

@@ -1,4 +1,5 @@
 FROM gcr.io/kaniko-project/executor:v1.6.0
 
+ENV KANIKO_VERSION=1.6.0
 ADD release/linux/amd64/kaniko-docker /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-docker"]

docker/docker/Dockerfile.linux.amd64.kaniko1.8.1

@@ -0,0 +1,5 @@
+FROM gcr.io/kaniko-project/executor:v1.8.1
+
+ENV KANIKO_VERSION=1.8.1
+ADD release/linux/amd64/kaniko-docker /kaniko/
+ENTRYPOINT ["/kaniko/kaniko-docker"]

docker/docker/Dockerfile.linux.arm64

@@ -3,5 +3,6 @@ FROM gcr.io/kaniko-project/executor:arm64-v1.6.0
 ENV HOME /root
 ENV USER root
 
+ENV KANIKO_VERSION=1.6.0
 ADD release/linux/arm64/kaniko-docker /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-docker"]

docker/docker/manifest-kaniko1.8.1.tmpl

@@ -0,0 +1,13 @@
+image: plugins/kaniko:{{#if build.tag}}{{trimPrefix "v" build.tag}}-kaniko1.8.1{{else}}latest-kaniko1.8.1{{/if}}
+{{#if build.tags}}
+tags:
+{{#each build.tags}}
+  - {{this}}
+{{/each}}
+{{/if}}
+manifests:
+  -
+    image: plugins/kaniko:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64-kaniko1.8.1
+    platform:
+      architecture: amd64
+      os: linux

docker/ecr/Dockerfile.linux.amd64

@@ -1,4 +1,5 @@
 FROM gcr.io/kaniko-project/executor:v1.6.0
 
+ENV KANIKO_VERSION=1.6.0
 ADD release/linux/amd64/kaniko-ecr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-ecr"]

docker/ecr/Dockerfile.linux.amd64.kaniko1.8.1

@@ -0,0 +1,5 @@
+FROM gcr.io/kaniko-project/executor:v1.8.1
+
+ENV KANIKO_VERSION=1.8.1
+ADD release/linux/amd64/kaniko-ecr /kaniko/
+ENTRYPOINT ["/kaniko/kaniko-ecr"]

docker/ecr/Dockerfile.linux.arm64

@@ -2,6 +2,7 @@ FROM gcr.io/kaniko-project/executor:arm64-v1.6.0
 
 ENV HOME /root
 ENV USER root
+ENV KANIKO_VERSION=1.6.0
 
 ADD release/linux/arm64/kaniko-ecr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-ecr"]

docker/ecr/manifest-kaniko1.8.1.tmpl

@@ -0,0 +1,13 @@
+image: plugins/kaniko-ecr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-kaniko1.8.1{{else}}latest-kaniko1.8.1{{/if}}
+{{#if build.tags}}
+tags:
+{{#each build.tags}}
+  - {{this}}
+{{/each}}
+{{/if}}
+manifests:
+  -
+    image: plugins/kaniko-ecr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64-kaniko1.8.1
+    platform:
+      architecture: amd64
+      os: linux

docker/gcr/Dockerfile.linux.amd64

@@ -1,4 +1,5 @@
 FROM gcr.io/kaniko-project/executor:v1.6.0
 
+ENV KANIKO_VERSION=1.6.0
 ADD release/linux/amd64/kaniko-gcr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-gcr"]

docker/gcr/Dockerfile.linux.amd64.kaniko1.8.1

@@ -0,0 +1,5 @@
+FROM gcr.io/kaniko-project/executor:v1.8.1
+
+ENV KANIKO_VERSION=1.8.1
+ADD release/linux/amd64/kaniko-gcr /kaniko/
+ENTRYPOINT ["/kaniko/kaniko-gcr"]

docker/gcr/Dockerfile.linux.arm64

@@ -2,6 +2,7 @@ FROM gcr.io/kaniko-project/executor:arm64-v1.6.0
 
 ENV HOME /root
 ENV USER root
+ENV KANIKO_VERSION=1.6.0
 
 ADD release/linux/arm64/kaniko-gcr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-gcr"]

docker/gcr/manifest-kaniko1.8.1.tmpl

@@ -0,0 +1,13 @@
+image: plugins/kaniko-gcr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-kaniko1.8.1{{else}}latest-kaniko1.8.1{{/if}}
+{{#if build.tags}}
+tags:
+{{#each build.tags}}
+  - {{this}}
+{{/each}}
+{{/if}}
+manifests:
+  -
+    image: plugins/kaniko-gcr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64-kaniko1.8.1
+    platform:
+      architecture: amd64
+      os: linux

go.mod

@@ -1,33 +1,46 @@
 module github.com/drone/drone-kaniko
 
 require (
-	github.com/aws/aws-sdk-go-v2 v1.8.1
-	github.com/aws/aws-sdk-go-v2/config v1.6.1
-	github.com/aws/aws-sdk-go-v2/service/ecr v1.4.3
-	github.com/aws/aws-sdk-go-v2/service/ecrpublic v1.4.3
-	github.com/aws/smithy-go v1.7.0
-	github.com/google/go-cmp v0.5.6
-	github.com/joho/godotenv v1.3.0
+	github.com/aws/aws-sdk-go v1.44.52
+	github.com/aws/aws-sdk-go-v2 v1.16.7
+	github.com/aws/aws-sdk-go-v2/config v1.15.14
+	github.com/aws/aws-sdk-go-v2/service/ecr v1.17.8
+	github.com/aws/aws-sdk-go-v2/service/ecrpublic v1.13.8
+	github.com/aws/smithy-go v1.12.0
+	github.com/coreos/go-semver v0.3.0
+	github.com/google/go-cmp v0.5.8
+	github.com/hashicorp/go-version v1.6.0
+	github.com/joho/godotenv v1.4.0
 	github.com/pkg/errors v0.9.1
-	github.com/sirupsen/logrus v1.3.0
-	github.com/urfave/cli v1.22.2
-	golang.org/x/mod v0.4.2
+	github.com/sirupsen/logrus v1.8.1
+	github.com/urfave/cli v1.22.9
+	golang.org/x/mod v0.5.1
 )
 
 require (
-	github.com/aws/aws-sdk-go-v2/credentials v1.3.3 // indirect
-	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.4.1 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/ini v1.2.1 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.2.3 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sso v1.3.3 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sts v1.6.2 // indirect
-	github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d // indirect
+	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.1.1 // indirect
+	github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.1.0 // indirect
+	github.com/Azure/azure-sdk-for-go/sdk/internal v1.0.0 // indirect
+	github.com/AzureAD/microsoft-authentication-library-for-go v0.5.3 // indirect
+	github.com/aws/aws-sdk-go-v2/credentials v1.12.9 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.12.8 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.14 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.4.8 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/ini v1.3.15 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.9.8 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sso v1.11.12 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sts v1.16.9 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
+	github.com/golang-jwt/jwt v3.2.2+incompatible // indirect
+	github.com/google/uuid v1.3.0 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
-	github.com/konsorten/go-windows-terminal-sequences v1.0.1 // indirect
-	github.com/russross/blackfriday/v2 v2.0.1 // indirect
-	github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
-	golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550 // indirect
-	golang.org/x/sys v0.0.0-20190412213103-97732733099d // indirect
+	github.com/kylelemons/godebug v1.1.0 // indirect
+	github.com/pkg/browser v0.0.0-20210911075715-681adbf594b8 // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	golang.org/x/crypto v0.0.0-20220722155217-630584e8d5aa // indirect
+	golang.org/x/net v0.0.0-20220725212005-46097bf591d3 // indirect
+	golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f // indirect
+	golang.org/x/text v0.3.7 // indirect
 )
 
-go 1.17
+go 1.18

go.sum

@@ -1,77 +1,106 @@
+github.com/Azure/azure-sdk-for-go/sdk/azcore v1.1.1 h1:tz19qLF65vuu2ibfTqGVJxG/zZAI27NEIIbvAOQwYbw=
+github.com/Azure/azure-sdk-for-go/sdk/azcore v1.1.1/go.mod h1:uGG2W01BaETf0Ozp+QxxKJdMBNRWPdstHG0Fmdwn1/U=
+github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.1.0 h1:QkAcEIAKbNL4KoFr4SathZPhDhF4mVwpBMFlYjyAqy8=
+github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.1.0/go.mod h1:bhXu1AjYL+wutSL/kpSq6s7733q2Rb0yuot9Zgfqa/0=
+github.com/Azure/azure-sdk-for-go/sdk/internal v1.0.0 h1:jp0dGvZ7ZK0mgqnTSClMxa5xuRL7NZgHameVYF6BurY=
+github.com/Azure/azure-sdk-for-go/sdk/internal v1.0.0/go.mod h1:eWRD7oawr1Mu1sLCawqVc0CUiF43ia3qQMxLscsKQ9w=
+github.com/AzureAD/microsoft-authentication-library-for-go v0.5.3 h1:TsFCaaF5tR4XN8b4zLVl/J4qMb0nf80Q4CXcpXDNJDY=
+github.com/AzureAD/microsoft-authentication-library-for-go v0.5.3/go.mod h1:Vt9sXTKwMyGcOxSmLDMnGPgqsUg7m8pe215qMLrDXw4=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/aws/aws-sdk-go-v2 v1.8.1 h1:GcFgQl7MsBygmeeqXyV1ivrTEmsVz/rdFJaTcltG9ag=
-github.com/aws/aws-sdk-go-v2 v1.8.1/go.mod h1:xEFuWz+3TYdlPRuo+CqATbeDWIWyaT5uAPwPaWtgse0=
-github.com/aws/aws-sdk-go-v2/config v1.6.1 h1:qrZINaORyr78syO1zfD4l7r4tZjy0Z1l0sy4jiysyOM=
-github.com/aws/aws-sdk-go-v2/config v1.6.1/go.mod h1:t/y3UPu0XEDy0cEw6mvygaBQaPzWiYAxfP2SzgtvclA=
-github.com/aws/aws-sdk-go-v2/credentials v1.3.3 h1:A13QPatmUl41SqUfnuT3V0E3XiNGL6qNTOINbE8cZL4=
-github.com/aws/aws-sdk-go-v2/credentials v1.3.3/go.mod h1:oVieKMT3m9BSfqhOfuQ+E0j/yN84ZAJ7Qv8Sfume/ak=
-github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.4.1 h1:rc+fRGvlKbeSd9IFhFS1KWBs0XjTkq0CfK5xqyLgIp0=
-github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.4.1/go.mod h1:+GTydg3uHmVlQdkRoetz6VHKbOMEYof70m19IpMLifc=
-github.com/aws/aws-sdk-go-v2/internal/ini v1.2.1 h1:IkqRRUZTKaS16P2vpX+FNc2jq3JWa3c478gykQp4ow4=
-github.com/aws/aws-sdk-go-v2/internal/ini v1.2.1/go.mod h1:Pv3WenDjI0v2Jl7UaMFIIbPOBbhn33RmmAmGgkXDoqY=
-github.com/aws/aws-sdk-go-v2/service/ecr v1.4.3 h1:d356GPVp5MzJ4n/xCBc26wLmRti0DoWO4WzNfxSesrY=
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-github.com/aws/aws-sdk-go-v2/service/ecrpublic v1.4.3 h1:EU9GrpMtGLCklSMLjuU6AZGG5wu6aiowxIgbfWwxrgs=
-github.com/aws/aws-sdk-go-v2/service/ecrpublic v1.4.3/go.mod h1:AAI7iB1GPqxjyKHbzLpBJdmH9/dPr34pxeLFdkKsONA=
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kaniko.go

@@ -8,29 +8,36 @@ import (
 	"strings"
 
 	"github.com/drone/drone-kaniko/pkg/artifact"
+	"github.com/drone/drone-kaniko/pkg/tagger"
 	"golang.org/x/mod/semver"
 )
 
 type (
 	// Build defines Docker build parameters.
 	Build struct {
-		Dockerfile    string   // Docker build Dockerfile
-		Context       string   // Docker build context
-		Tags          []string // Docker build tags
-		AutoTag       bool     // Set this to create semver-tagged labels
-		Args          []string // Docker build args
-		Target        string   // Docker build target
-		Repo          string   // Docker build repository
-		Labels        []string // Label map
-		SkipTlsVerify bool     // Docker skip tls certificate verify for registry
-		SnapshotMode  string   // Kaniko snapshot mode
-		EnableCache   bool     // Whether to enable kaniko cache
-		CacheRepo     string   // Remote repository that will be used to store cached layers
-		CacheTTL      int      // Cache timeout in hours
-		DigestFile    string   // Digest file location
-		NoPush        bool     // Set this flag if you only want to build the image, without pushing to a registry
-		Verbosity     string   // Log level
-		Platform      string   // Allows to build with another default platform than the host, similarly to docker build --platform
+		DroneCommitRef   string   // Drone git commit reference
+		DroneRepoBranch  string   // Drone repo branch
+		Dockerfile       string   // Docker build Dockerfile
+		Context          string   // Docker build context
+		Tags             []string // Docker build tags
+		AutoTag          bool     // Set this to auto detect tags from git commits and semver-tagged labels
+		AutoTagSuffix    string   // Suffix to append to the auto detect tags
+		ExpandTag        bool     // Set this to expand the `Tags` into semver-tagged labels
+		Args             []string // Docker build args
+		Target           string   // Docker build target
+		Repo             string   // Docker build repository
+		Mirrors          []string // Docker repository mirrors
+		Labels           []string // Label map
+		SkipTlsVerify    bool     // Docker skip tls certificate verify for registry
+		SnapshotMode     string   // Kaniko snapshot mode
+		EnableCache      bool     // Whether to enable kaniko cache
+		CacheRepo        string   // Remote repository that will be used to store cached layers
+		CacheTTL         int      // Cache timeout in hours
+		DigestFile       string   // Digest file location
+		NoPush           bool     // Set this flag if you only want to build the image, without pushing to a registry
+		Verbosity        string   // Log level
+		Platform         string   // Allows to build with another default platform than the host, similarly to docker build --platform
+		SkipUnusedStages bool     // Build only used stages
 	}
 
 	// Artifact defines content of artifact file
@@ -49,7 +56,7 @@ type (
 	}
 )
 
-// labelsForTag returns the labels to use for the given tag, subject to the value of AutoTag.
+// labelsForTag returns the labels to use for the given tag, subject to the value of ExpandTag.
 //
 // Build information (e.g. +linux_amd64) is carried through to all labels.
 // Pre-release information (e.g. -rc1) suppresses major and major+minor auto-labels.
@@ -66,8 +73,8 @@ func (b Build) labelsForTag(tag string) (labels []string) {
 		semverTag = withV
 	}
 
-	// Pass through tags if auto-tag is not set, or if the tag is not a semantic version
-	if !b.AutoTag || !semver.IsValid(semverTag) {
+	// Pass through tags if expand-tag is not set, or if the tag is not a semantic version
+	if !b.ExpandTag || !semver.IsValid(semverTag) {
 		return []string{tag}
 	}
 	tag = semverTag
@@ -90,6 +97,30 @@ func (b Build) labelsForTag(tag string) (labels []string) {
 	}
 }
 
+// Returns the auto detected tags. See the AutoTag section of
+// https://plugins.drone.io/drone-plugins/drone-docker/ for more info.
+func (b Build) AutoTags() (tags []string, err error) {
+	if len(b.Tags) > 1 || len(b.Tags) == 1 && b.Tags[0] != "latest" {
+		err = fmt.Errorf("The auto-tag flag does not work with user provided tags %s", b.Tags)
+		return
+	}
+	// We have tried the best to prevent enabling auto-tag and passing in
+	// user specified at the same time. Starts to auto detect tags.
+	// Note: passing in a "latest" tag with auto-tag enabled won't trigger the
+	// early returns above, because we cannot tell if the tag is provided by
+	// the default value or by the users.
+	commitRef := b.DroneCommitRef
+	if !tagger.UseAutoTag(commitRef, b.DroneRepoBranch) {
+		err = fmt.Errorf("Could not auto detect the tag. Skipping automated docker build for commit %s", commitRef)
+		return
+	}
+	tags, err = tagger.AutoTagsSuffix(commitRef, b.AutoTagSuffix)
+	if err != nil {
+		err = fmt.Errorf("Invalid semantic version when auto detecting the tag. Skipping automated docker build for %s.", commitRef)
+	}
+	return
+}
+
 // Exec executes the plugin step
 func (p Plugin) Exec() error {
 	if !p.Build.NoPush && p.Build.Repo == "" {
@@ -100,6 +131,18 @@ func (p Plugin) Exec() error {
 		return fmt.Errorf("dockerfile does not exist at path: %s", p.Build.Dockerfile)
 	}
 
+	var tags = p.Build.Tags
+	if p.Build.AutoTag && p.Build.ExpandTag {
+		return fmt.Errorf("The auto-tag flag conflicts with the expand-tag flag")
+	}
+	if p.Build.AutoTag {
+		var err error
+		tags, err = p.Build.AutoTags()
+		if err != nil {
+			return err
+		}
+	}
+
 	cmdArgs := []string{
 		fmt.Sprintf("--dockerfile=%s", p.Build.Dockerfile),
 		fmt.Sprintf("--context=dir://%s", p.Build.Context),
@@ -107,7 +150,7 @@ func (p Plugin) Exec() error {
 
 	// Set the destination repository
 	if !p.Build.NoPush {
-		for _, tag := range p.Build.Tags {
+		for _, tag := range tags {
 			for _, label := range p.Build.labelsForTag(tag) {
 				cmdArgs = append(cmdArgs, fmt.Sprintf("--destination=%s:%s", p.Build.Repo, label))
 			}
@@ -121,7 +164,10 @@ func (p Plugin) Exec() error {
 	for _, label := range p.Build.Labels {
 		cmdArgs = append(cmdArgs, fmt.Sprintf("--label=%s", label))
 	}
-
+	// Set repository mirrors
+	for _, mirror := range p.Build.Mirrors {
+		cmdArgs = append(cmdArgs, fmt.Sprintf("--registry-mirror=%s", mirror))
+	}
 	if p.Build.Target != "" {
 		cmdArgs = append(cmdArgs, fmt.Sprintf("--target=%s", p.Build.Target))
 	}
@@ -162,6 +208,10 @@ func (p Plugin) Exec() error {
 		cmdArgs = append(cmdArgs, fmt.Sprintf("--customPlatform=%s", p.Build.Platform))
 	}
 
+	if p.Build.SkipUnusedStages {
+		cmdArgs = append(cmdArgs, "--skip-unused-stages")
+	}
+
 	cmd := exec.Command("/kaniko/executor", cmdArgs...)
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr

kaniko_test.go

@@ -8,67 +8,134 @@ import (
 
 func TestBuild_labelsForTag(t *testing.T) {
 	tests := []struct {
-		name     string
-		tag      string
-		autoTags []string
+		name       string
+		tag        string
+		expandTags []string
 	}{
 		{
-			name:     "semver",
-			tag:      "v1.2.3",
-			autoTags: []string{"1", "1.2", "1.2.3"},
+			name:       "semver",
+			tag:        "v1.2.3",
+			expandTags: []string{"1", "1.2", "1.2.3"},
 		},
 		{
-			name:     "no_patch",
-			tag:      "v1.2",
-			autoTags: []string{"1", "1.2", "1.2.0"},
+			name:       "no_patch",
+			tag:        "v1.2",
+			expandTags: []string{"1", "1.2", "1.2.0"},
 		},
 		{
-			name:     "only_major",
-			tag:      "v1",
-			autoTags: []string{"1", "1.0", "1.0.0"},
+			name:       "only_major",
+			tag:        "v1",
+			expandTags: []string{"1", "1.0", "1.0.0"},
 		},
 		{
-			name:     "full_with_build",
-			tag:      "v1.2.3+build-info",
-			autoTags: []string{"1+build-info", "1.2+build-info", "1.2.3+build-info"},
+			name:       "full_with_build",
+			tag:        "v1.2.3+build-info",
+			expandTags: []string{"1+build-info", "1.2+build-info", "1.2.3+build-info"},
 		},
 		{
-			name:     "build_with_underscores",
-			tag:      "v1.2.3+linux_amd64",
-			autoTags: []string{"1+linux-amd64", "1.2+linux-amd64", "1.2.3+linux-amd64"},
+			name:       "build_with_underscores",
+			tag:        "v1.2.3+linux_amd64",
+			expandTags: []string{"1+linux-amd64", "1.2+linux-amd64", "1.2.3+linux-amd64"},
 		},
 		{
-			name:     "prerelease",
-			tag:      "v1.2.3-rc1",
-			autoTags: []string{"1.2.3-rc1"},
+			name:       "prerelease",
+			tag:        "v1.2.3-rc1",
+			expandTags: []string{"1.2.3-rc1"},
 		},
 		{
-			name:     "prerelease_with_build",
-			tag:      "v1.2.3-rc1+bld",
-			autoTags: []string{"1.2.3-rc1+bld"},
+			name:       "prerelease_with_build",
+			tag:        "v1.2.3-rc1+bld",
+			expandTags: []string{"1.2.3-rc1+bld"},
 		},
 		{
-			name:     "invalid_build",
-			tag:      "v1+bld", // can only include build detail with all three elements
-			autoTags: []string{"v1+bld"},
+			name:       "invalid_build",
+			tag:        "v1+bld", // can only include build detail with all three elements
+			expandTags: []string{"v1+bld"},
 		},
 		{
-			name:     "accidental_non_semver",
-			tag:      "1.2.3",
-			autoTags: []string{"1", "1.2", "1.2.3"},
+			name:       "accidental_non_semver",
+			tag:        "1.2.3",
+			expandTags: []string{"1", "1.2", "1.2.3"},
 		},
 		{
-			name:     "non_semver",
-			tag:      "latest",
-			autoTags: []string{"latest"},
+			name:       "non_semver",
+			tag:        "latest",
+			expandTags: []string{"latest"},
 		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			tags := Build{AutoTag: true}.labelsForTag(tt.tag)
-			if got, want := tags, tt.autoTags; !cmp.Equal(got, want) {
+			tags := Build{ExpandTag: true}.labelsForTag(tt.tag)
+			if got, want := tags, tt.expandTags; !cmp.Equal(got, want) {
 				t.Errorf("tagsFor(%q) = %q, want %q", tt.tag, got, want)
 			}
 		})
 	}
 }
+
+func TestBuild_AutoTags(t *testing.T) {
+	tests := []struct {
+		name          string
+		repoBranch    string
+		commitRef     string
+		autoTagSuffix string
+		expectedTags  []string
+	}{
+		{
+			name:          "commit push",
+			repoBranch:    "master",
+			commitRef:     "refs/heads/master",
+			autoTagSuffix: "",
+			expectedTags:  []string{"latest"},
+		},
+		{
+			name:          "tag push",
+			repoBranch:    "master",
+			commitRef:     "refs/tags/v1.0.0",
+			autoTagSuffix: "",
+			expectedTags: []string{
+				"1",
+				"1.0",
+				"1.0.0",
+			},
+		},
+		{
+			name:          "tag push",
+			repoBranch:    "master",
+			commitRef:     "refs/tags/v1.0.0",
+			autoTagSuffix: "linux-amd64",
+			expectedTags: []string{
+				"1-linux-amd64",
+				"1.0-linux-amd64",
+				"1.0.0-linux-amd64",
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			b := Build{DroneCommitRef: tt.commitRef, DroneRepoBranch: tt.repoBranch, AutoTag: true}
+			if tt.autoTagSuffix != "" {
+				b.AutoTagSuffix = tt.autoTagSuffix
+			}
+			tags, err := b.AutoTags()
+			if err != nil {
+				t.Errorf("Unexpected err %q", err)
+			}
+			if got, want := tags, tt.expectedTags; !cmp.Equal(got, want) {
+				t.Errorf("auto detected tags = %q, wanted = %q", got, want)
+			}
+		})
+	}
+	t.Run("auto-tag cannot be enabled with user provided tags", func(t *testing.T) {
+		b := Build{
+			DroneCommitRef:  "refs/tags/v1.0.0",
+			DroneRepoBranch: "master",
+			AutoTag:         true,
+			Tags:            []string{"v1"},
+		}
+		_, err := b.AutoTags()
+		if err == nil {
+			t.Errorf("Expect error for invalid flags")
+		}
+	})
+}

pkg/docker/docker_file.go

@@ -0,0 +1,34 @@
+package docker
+
+import (
+	"encoding/base64"
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"github.com/pkg/errors"
+)
+
+// Create the docker config file for authentication
+func CreateDockerCfgFile(username, password, registry, path string) error {
+	if username == "" {
+		return fmt.Errorf("Username must be specified")
+	}
+	if password == "" {
+		return fmt.Errorf("Password must be specified")
+	}
+
+	err := os.MkdirAll(path, 0600)
+	if err != nil {
+		return errors.Wrap(err, fmt.Sprintf("failed to create %s directory", path))
+	}
+
+	authBytes := []byte(fmt.Sprintf("%s:%s", username, password))
+	encodedString := base64.StdEncoding.EncodeToString(authBytes)
+	jsonBytes := []byte(fmt.Sprintf(`{"auths": {"%s": {"auth": "%s"}}}`, "https://"+registry, encodedString))
+	err = ioutil.WriteFile(path, jsonBytes, 0644)
+	if err != nil {
+		return errors.Wrap(err, "failed to create docker config file")
+	}
+	return nil
+}

pkg/tagger/tagger.go

@@ -0,0 +1,95 @@
+// A fork of https://github.com/drone-plugins/drone-docker/blob/master/tags.go
+
+package tagger
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/coreos/go-semver/semver"
+)
+
+// AutoTagsSuffix returns a set of default suggested tags
+// based on the commit ref with an attached suffix.
+func AutoTagsSuffix(ref, suffix string) ([]string, error) {
+	tags, err := AutoTags(ref)
+	if err != nil {
+		return nil, err
+	}
+	if len(suffix) == 0 {
+		return tags, nil
+	}
+	for i, tag := range tags {
+		if tag == "latest" {
+			tags[i] = suffix
+		} else {
+			tags[i] = fmt.Sprintf("%s-%s", tag, suffix)
+		}
+	}
+	return tags, nil
+}
+
+func splitOff(input string, delim string) string {
+	parts := strings.SplitN(input, delim, 2)
+
+	if len(parts) == 2 {
+		return parts[0]
+	}
+
+	return input
+}
+
+// AutoTags returns a set of default suggested tags based on
+// the commit ref.
+func AutoTags(ref string) ([]string, error) {
+	if !strings.HasPrefix(ref, "refs/tags/") {
+		return []string{"latest"}, nil
+	}
+	v := stripTagPrefix(ref)
+	version, err := semver.NewVersion(v)
+	if err != nil {
+		return []string{"latest"}, err
+	}
+	if version.PreRelease != "" || version.Metadata != "" {
+		return []string{
+			version.String(),
+		}, nil
+	}
+
+	v = stripTagPrefix(ref)
+	v = splitOff(splitOff(v, "+"), "-")
+	dotParts := strings.SplitN(v, ".", 3)
+
+	if version.Major == 0 {
+		return []string{
+			fmt.Sprintf("%0*d.%0*d", len(dotParts[0]), version.Major, len(dotParts[1]), version.Minor),
+			fmt.Sprintf("%0*d.%0*d.%0*d", len(dotParts[0]), version.Major, len(dotParts[1]), version.Minor, len(dotParts[2]), version.Patch),
+		}, nil
+	}
+	return []string{
+		fmt.Sprintf("%0*d", len(dotParts[0]), version.Major),
+		fmt.Sprintf("%0*d.%0*d", len(dotParts[0]), version.Major, len(dotParts[1]), version.Minor),
+		fmt.Sprintf("%0*d.%0*d.%0*d", len(dotParts[0]), version.Major, len(dotParts[1]), version.Minor, len(dotParts[2]), version.Patch),
+	}, nil
+}
+
+// UseAutoTag for keep only default branch for latest tag.
+func UseAutoTag(ref, defaultBranch string) bool {
+	if strings.HasPrefix(ref, "refs/tags/") {
+		return true
+	}
+	if stripHeadPrefix(ref) == defaultBranch {
+		return true
+	}
+	return false
+}
+
+func stripHeadPrefix(ref string) string {
+	return strings.TrimPrefix(ref, "refs/heads/")
+}
+
+func stripTagPrefix(ref string) string {
+	ref = strings.TrimPrefix(ref, "refs/tags/")
+	ref = strings.TrimPrefix(ref, "v")
+	return ref
+}

pkg/tagger/tagger_test.go

@@ -0,0 +1,199 @@
+// A fork of https://github.com/drone-plugins/drone-docker/blob/master/tags_test.go
+
+package tagger
+
+import (
+	"reflect"
+	"testing"
+)
+
+func Test_stripTagPrefix(t *testing.T) {
+	var tests = []struct {
+		Before string
+		After  string
+	}{
+		{"refs/tags/1.0.0", "1.0.0"},
+		{"refs/tags/v1.0.0", "1.0.0"},
+		{"v1.0.0", "1.0.0"},
+	}
+
+	for _, test := range tests {
+		got, want := stripTagPrefix(test.Before), test.After
+		if got != want {
+			t.Errorf("Got tag %s, want %s", got, want)
+		}
+	}
+}
+
+func TestAutoTags(t *testing.T) {
+	var tests = []struct {
+		Before string
+		After  []string
+	}{
+		{"", []string{"latest"}},
+		{"refs/heads/master", []string{"latest"}},
+		{"refs/tags/0.9.0", []string{"0.9", "0.9.0"}},
+		{"refs/tags/1.0.0", []string{"1", "1.0", "1.0.0"}},
+		{"refs/tags/v1.0.0", []string{"1", "1.0", "1.0.0"}},
+		{"refs/tags/v1.0.0-alpha.1", []string{"1.0.0-alpha.1"}},
+	}
+
+	for _, test := range tests {
+		tags, err := AutoTags(test.Before)
+		if err != nil {
+			t.Error(err)
+			continue
+		}
+		got, want := tags, test.After
+		if !reflect.DeepEqual(got, want) {
+			t.Errorf("Got tag %v, want %v", got, want)
+		}
+	}
+}
+
+func TestAutoTagsError(t *testing.T) {
+	var tests = []string{
+		"refs/tags/x1.0.0",
+		"refs/tags/20190203",
+	}
+
+	for _, test := range tests {
+		_, err := AutoTags(test)
+		if err == nil {
+			t.Errorf("Expect tag error for %s", test)
+		}
+	}
+}
+
+func TestAutoTagsSuffix(t *testing.T) {
+	var tests = []struct {
+		Before string
+		Suffix string
+		After  []string
+	}{
+		// without suffix
+		{
+			After: []string{"latest"},
+		},
+		{
+			Before: "refs/tags/v1.0.0",
+			After: []string{
+				"1",
+				"1.0",
+				"1.0.0",
+			},
+		},
+		// with suffix
+		{
+			Suffix: "linux-amd64",
+			After:  []string{"linux-amd64"},
+		},
+		{
+			Before: "refs/tags/v1.0.0",
+			Suffix: "linux-amd64",
+			After: []string{
+				"1-linux-amd64",
+				"1.0-linux-amd64",
+				"1.0.0-linux-amd64",
+			},
+		},
+		{
+			Suffix: "nanoserver",
+			After:  []string{"nanoserver"},
+		},
+		{
+			Before: "refs/tags/v1.9.2",
+			Suffix: "nanoserver",
+			After: []string{
+				"1-nanoserver",
+				"1.9-nanoserver",
+				"1.9.2-nanoserver",
+			},
+		},
+		{
+			Before: "refs/tags/v18.06.0",
+			Suffix: "nanoserver",
+			After: []string{
+				"18-nanoserver",
+				"18.06-nanoserver",
+				"18.06.0-nanoserver",
+			},
+		},
+	}
+
+	for _, test := range tests {
+		tag, err := AutoTagsSuffix(test.Before, test.Suffix)
+		if err != nil {
+			t.Error(err)
+			continue
+		}
+		got, want := tag, test.After
+		if !reflect.DeepEqual(got, want) {
+			t.Errorf("Got tag %v, want %v", got, want)
+		}
+	}
+}
+
+func Test_stripHeadPrefix(t *testing.T) {
+	type args struct {
+		ref string
+	}
+	tests := []struct {
+		args args
+		want string
+	}{
+		{
+			args: args{
+				ref: "refs/heads/master",
+			},
+			want: "master",
+		},
+	}
+	for _, tt := range tests {
+		if got := stripHeadPrefix(tt.args.ref); got != tt.want {
+			t.Errorf("stripHeadPrefix() = %v, want %v", got, tt.want)
+		}
+	}
+}
+
+func TestUseAutoTag(t *testing.T) {
+	type args struct {
+		ref           string
+		defaultBranch string
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{
+			name: "latest tag for default branch",
+			args: args{
+				ref:           "refs/heads/master",
+				defaultBranch: "master",
+			},
+			want: true,
+		},
+		{
+			name: "build from tags",
+			args: args{
+				ref:           "refs/tags/v1.0.0",
+				defaultBranch: "master",
+			},
+			want: true,
+		},
+		{
+			name: "skip build for not default branch",
+			args: args{
+				ref:           "refs/heads/develop",
+				defaultBranch: "master",
+			},
+			want: false,
+		},
+	}
+	for _, tt := range tests {
+		if got := UseAutoTag(tt.args.ref, tt.args.defaultBranch); got != tt.want {
+			t.Errorf("%q. UseAutoTag() = %v, want %v", tt.name, got, tt.want)
+		}
+	}
+}

scripts/build.sh

@@ -11,13 +11,16 @@ set -x
 
 # linux
 GOOS=linux GOARCH=amd64 go build -o release/linux/amd64/kaniko-gcr    ./cmd/kaniko-gcr
+GOOS=linux GOARCH=amd64 go build -o release/linux/amd64/kaniko-acr    ./cmd/kaniko-acr
 GOOS=linux GOARCH=amd64 go build -o release/linux/amd64/kaniko-ecr    ./cmd/kaniko-ecr
 GOOS=linux GOARCH=amd64 go build -o release/linux/amd64/kaniko-docker ./cmd/kaniko-docker
 
 GOOS=linux GOARCH=arm64 go build -o release/linux/arm64/kaniko-gcr    ./cmd/kaniko-gcr
+GOOS=linux GOARCH=arm64 go build -o release/linux/arm64/kaniko-acr    ./cmd/kaniko-acr
 GOOS=linux GOARCH=arm64 go build -o release/linux/arm64/kaniko-ecr    ./cmd/kaniko-ecr
 GOOS=linux GOARCH=arm64 go build -o release/linux/arm64/kaniko-docker ./cmd/kaniko-docker
 
 GOOS=linux GOARCH=arm   go build -o release/linux/arm/kaniko-gcr      ./cmd/kaniko-gcr
+GOOS=linux GOARCH=arm   go build -o release/linux/arm/kaniko-acr      ./cmd/kaniko-acr
 GOOS=linux GOARCH=arm   go build -o release/linux/arm/kaniko-ecr      ./cmd/kaniko-ecr
 GOOS=linux GOARCH=arm   go build -o release/linux/arm/kaniko-docker   ./cmd/kaniko-docker