fix: [CI-10908]: added kaniko 1.19.2 suport for dockerignore (#92)

* seperate out gcr and gar

.drone.yml

@@ -1,10 +1,17 @@
 kind: pipeline
-type: docker
+type: vm
 name: default
 
+pool:
+  use: ubuntu
+
+platform:
+  os: linux
+  arch: amd64
+
 steps:
 - name: build
-  image: golang
+  image: golang:1.21
   commands:
   - go test ./...
   - sh scripts/build.sh
@@ -43,6 +50,23 @@ steps:
       exclude:
       - pull_request
 
+- name: gar
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko-gar
+    auto_tag: true
+    auto_tag_suffix: linux-amd64
+    daemon_off: false
+    dockerfile: docker/gar/Dockerfile.linux.amd64
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+        - pull_request
+
 - name: ecr
   image: plugins/docker
   settings:
@@ -60,11 +84,265 @@ 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-v1-9
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko
+    auto_tag: true
+    auto_tag_suffix: linux-amd64-kaniko1.9.1
+    daemon_off: false
+    dockerfile: docker/docker/Dockerfile.linux.amd64.kaniko1.9.1
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+      - pull_request
+
+- name: gcr-kaniko-v1-9
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko-gcr
+    auto_tag: true
+    auto_tag_suffix: linux-amd64-kaniko1.9.1
+    daemon_off: false
+    dockerfile: docker/gcr/Dockerfile.linux.amd64.kaniko1.9.1
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+      - pull_request
+
+- name: gar-kaniko-v1-9
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko-gar
+    auto_tag: true
+    auto_tag_suffix: linux-amd64-kaniko1.9.1
+    daemon_off: false
+    dockerfile: docker/gar/Dockerfile.linux.amd64.kaniko1.9.1
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+        - pull_request
+
+- name: ecr-kaniko-v1-9
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko-ecr
+    auto_tag: true
+    auto_tag_suffix: linux-amd64-kaniko1.9.1
+    daemon_off: false
+    dockerfile: docker/ecr/Dockerfile.linux.amd64.kaniko1.9.1
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+      - pull_request
 ---
 kind: pipeline
-type: docker
+type: vm
+name: arm
+
+pool:
+  use: ubuntu_arm64
+
+steps:
+- name: build
+  image: golang:1.21
+  commands:
+  - go test ./...
+  - sh scripts/build.sh
+
+- name: docker
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko
+    auto_tag: true
+    auto_tag_suffix: linux-arm64
+    daemon_off: false
+    dockerfile: docker/docker/Dockerfile.linux.arm64
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+      - pull_request
+
+- name: gcr
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko-gcr
+    auto_tag: true
+    auto_tag_suffix: linux-arm64
+    daemon_off: false
+    dockerfile: docker/gcr/Dockerfile.linux.arm64
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+      - pull_request
+
+- name: gar
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko-gar
+    auto_tag: true
+    auto_tag_suffix: linux-arm64
+    daemon_off: false
+    dockerfile: docker/gar/Dockerfile.linux.arm64
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+        - pull_request
+
+- name: ecr
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko-ecr
+    auto_tag: true
+    auto_tag_suffix: linux-arm64
+    daemon_off: false
+    dockerfile: docker/ecr/Dockerfile.linux.arm64
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+      - pull_request
+
+- name: acr
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko-acr
+    auto_tag: true
+    auto_tag_suffix: linux-arm64
+    daemon_off: false
+    dockerfile: docker/acr/Dockerfile.linux.arm64
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+      - pull_request
+
+- name: docker-kaniko-v1-9
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko
+    auto_tag: true
+    auto_tag_suffix: linux-arm64-kaniko1.9.1
+    daemon_off: false
+    dockerfile: docker/docker/Dockerfile.linux.arm64.kaniko1.9.1
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+      - pull_request
+
+- name: gcr-kaniko-v1-9
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko-gcr
+    auto_tag: true
+    auto_tag_suffix: linux-arm64-kaniko1.9.1
+    daemon_off: false
+    dockerfile: docker/gcr/Dockerfile.linux.arm64.kaniko1.9.1
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+      - pull_request
+
+- name: gar-kaniko-v1-9
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko-gar
+    auto_tag: true
+    auto_tag_suffix: linux-arm64-kaniko1.9.1
+    daemon_off: false
+    dockerfile: docker/gar/Dockerfile.linux.arm64.kaniko1.9.1
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+        - pull_request
+
+- name: ecr-kaniko-v1-9
+  image: plugins/docker
+  settings:
+    repo: plugins/kaniko-ecr
+    auto_tag: true
+    auto_tag_suffix: linux-arm64-kaniko1.9.1
+    daemon_off: false
+    dockerfile: docker/ecr/Dockerfile.linux.arm64.kaniko1.9.1
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    event:
+      exclude:
+      - pull_request
+---
+kind: pipeline
+type: vm
 name: notifications-docker
 
+pool:
+  use: ubuntu
+
 platform:
   os: linux
   arch: amd64
@@ -94,6 +372,30 @@ steps:
     username:
       from_secret: docker_username
 
+- name: manifest-gar
+  pull: always
+  image: plugins/manifest
+  settings:
+    auto_tag: true
+    ignore_missing: true
+    password:
+      from_secret: docker_password
+    spec: docker/gar/manifest.tmpl
+    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 +414,75 @@ trigger:
   - "refs/tags/**"
 
 depends_on:
-- default
+- default
+- arm
+
+---
+kind: pipeline
+type: vm
+name: notifications-docker-kaniko1-8
+
+pool:
+  use: ubuntu
+
+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-kaniko1.9.1.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-kaniko1.9.1.tmpl
+    username:
+      from_secret: docker_username
+
+- name: manifest-gar
+  pull: always
+  image: plugins/manifest
+  settings:
+    auto_tag: false
+    ignore_missing: true
+    password:
+      from_secret: docker_password
+    spec: docker/gar/manifest-kaniko1.9.1.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-kaniko1.9.1.tmpl
+    username:
+      from_secret: docker_username
+
+trigger:
+  ref:
+  - refs/heads/main
+  - "refs/tags/**"
+
+depends_on:
+- default
+- arm

.gitignore

@@ -1,3 +1,5 @@
 release
 coverage.out
 vendor
+.idea
+.vscode

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 1.9.1 kaniko version from 1.5.1 release tag. `plugins/kaniko:<release-tag>` uses 1.6.0 version while `plugins/kaniko:<release-tag>-kaniko1.9.1` uses 1.9.1 version. Similar convention is used for plugins/kaniko-ecr & plugins/kaniko-gcr images as well.
+
 ## Build
 
 Build the binaries with the following commands:
@@ -15,6 +17,7 @@ export GO111MODULE=on
 go build -v -a -tags netgo -o release/linux/amd64/kaniko-docker ./cmd/kaniko-docker
 go build -v -a -tags netgo -o release/linux/amd64/kaniko-gcr ./cmd/kaniko-gcr
 go build -v -a -tags netgo -o release/linux/amd64/kaniko-ecr ./cmd/kaniko-ecr
+go build -v -a -tags netgo -o release/linux/amd64/kaniko-acr ./cmd/kaniko-acr
 ```
 
 ## Docker
@@ -26,6 +29,11 @@ docker build \
   --label org.label-schema.build-date=$(date -u +"%Y-%m-%dT%H:%M:%SZ") \
   --label org.label-schema.vcs-ref=$(git rev-parse --short HEAD) \
   --file docker/docker/Dockerfile.linux.amd64 --tag plugins/kaniko .
+  
+docker build \
+  --label org.label-schema.build-date=$(date -u +"%Y-%m-%dT%H:%M:%SZ") \
+  --label org.label-schema.vcs-ref=$(git rev-parse --short HEAD) \
+  --file docker/acr/Dockerfile.linux.amd64 --tag plugins/kaniko-acr .
 
 docker build \
   --label org.label-schema.build-date=$(date -u +"%Y-%m-%dT%H:%M:%SZ") \
@@ -39,6 +47,7 @@ docker build \
 ```
 
 ## Usage
+### Manual Tagging
 
 ```console
 docker run --rm \
@@ -51,3 +60,79 @@ docker run --rm \
     -w /drone \
     plugins/kaniko:linux-amd64
 ```
+
+With expanded 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_EXPAND_TAG=true \
+    -v $(pwd):/drone \
+    -w /drone \
+    plugins/kaniko:linux-amd64
+```
+would both be equivalent to
+
+```
+PLUGIN_TAGS=1,1.2,1.2.3,latest
+```
+
+This allows for passing `$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_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 +1,455 @@
+package main
+
+import (
+	"context"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"os"
+	"strings"
+
+	"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"
+	defaultDigestFile  string = "/kaniko/digest-file"
+	finalUrl           string = "https://portal.azure.com/#view/Microsoft_Azure_ContainerRegistries/TagMetadataBlade/registryId/"
+)
+
+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 encoded in base64 format",
+			EnvVar: "CLIENT_CERTIFICATE",
+		},
+		cli.StringFlag{
+			Name:   "tenant-id",
+			Usage:  "Azure Tenant Id",
+			EnvVar: "TENANT_ID",
+		},
+		cli.StringFlag{
+			Name:   "subscription-id",
+			Usage:  "Azure Subscription Id",
+			EnvVar: "SUBSCRIPTION_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")
+
+	publicUrl, err := setupAuth(
+		c.String("tenant-id"),
+		c.String("client-id"),
+		c.String("client-cert"),
+		c.String("client-secret"),
+		c.String("subscription-id"),
+		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:     publicUrl, // this is public url on which the artifact can be seen
+			ArtifactFile: c.String("artifact-file"),
+			RegistryType: artifact.Docker,
+		},
+	}
+	return plugin.Exec()
+}
+
+func setupAuth(tenantId, clientId, cert,
+	clientSecret, subscriptionId, registry string, noPush bool) (string, 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, publicUrl, err := getACRToken(subscriptionId, 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")
+		}
+		return publicUrl, nil
+	} else {
+		return "", fmt.Errorf("managed authentication is not supported")
+	}
+}
+
+func getACRToken(subscriptionId, tenantId, clientId, clientSecret, cert, registry string) (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 secret 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")
+		}
+	}
+
+	if err := os.Setenv(clientIdEnv, clientId); err != nil {
+		return "", "", errors.Wrap(err, "failed to set env variable client Id")
+	}
+	if err := os.Setenv(clientSecretKeyEnv, clientSecret); err != nil {
+		return "", "", errors.Wrap(err, "failed to set env variable client secret")
+	}
+	if err := os.Setenv(tenantKeyEnv, tenantId); err != nil {
+		return "", "", errors.Wrap(err, "failed to set env variable tenant Id")
+	}
+	if err := os.Setenv(certPathEnv, ACRCertPath); err != nil {
+		return "", "", errors.Wrap(err, "failed to set env variable cert path")
+	}
+	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")
+	}
+
+	publicUrl, err := getPublicUrl(azToken.Token, registry, subscriptionId)
+	if err != nil {
+		// execution should not fail because of this error.
+		fmt.Fprintf(os.Stderr, "failed to get public url with error: %s\n", err)
+	}
+
+	ACRToken, err := fetchACRToken(tenantId, azToken.Token, registry)
+	if err != nil {
+		return "", "", errors.Wrap(err, "failed to fetch ACR token")
+	}
+	return ACRToken, publicUrl, 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(cert string) error {
+	decoded, err := base64.StdEncoding.DecodeString(cert)
+	if err != nil {
+		return errors.Wrap(err, "failed to base64 decode ACR certificate")
+	}
+	err = ioutil.WriteFile(ACRCertPath, []byte(decoded), 0644)
+	if err != nil {
+		return errors.Wrap(err, "failed to write ACR certificate")
+	}
+	return nil
+}
+
+func getPublicUrl(token, registryUrl, subscriptionId string) (string, error) {
+	// for backward compatibilty, if the subscription id is not defined, do not fail step.
+	if len(subscriptionId) == 0 {
+		return "", nil
+	}
+
+	registry := strings.Split(registryUrl, ".")[0]
+	burl := "https://management.azure.com/subscriptions/" +
+		subscriptionId + "/resources?$filter=resourceType%20eq%20'Microsoft.ContainerRegistry/registries'%20and%20name%20eq%20'" +
+		registry + "'&api-version=2021-04-01&$select=id"
+
+	method := "GET"
+	client := &http.Client{}
+	req, err := http.NewRequest(method, burl, nil)
+	if err != nil {
+		fmt.Println(err)
+		return "", errors.Wrap(err, "failed to create request for getting container registry setting")
+	}
+
+	req.Header.Add("Authorization", "Bearer "+token)
+	res, err := client.Do(req)
+	if err != nil {
+		fmt.Println(err)
+		return "", errors.Wrap(err, "failed to send request for getting container registry setting")
+	}
+	defer res.Body.Close()
+
+	var response strct
+	err = json.NewDecoder(res.Body).Decode(&response)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to send request for getting container registry setting")
+	}
+
+	if len(response.Value) == 0 {
+		return "", errors.New("did not receive any registry information from /subscriptions API")
+	}
+
+	if response.Value[0].ID == "" {
+		return "", errors.New("received empty registry ID from /subscriptions API")
+	}
+
+	return finalUrl + encodeParam(response.Value[0].ID), nil
+}
+
+func encodeParam(s string) string {
+	return url.QueryEscape(s)
+}
+
+type strct struct {
+	Value []struct {
+		ID string `json:"id"`
+	} `json:"value"`
+}

cmd/kaniko-docker/main.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
+	"strings"
 
 	"github.com/joho/godotenv"
 	"github.com/pkg/errors"
@@ -12,6 +13,7 @@ import (
 	"github.com/urfave/cli"
 
 	kaniko "github.com/drone/drone-kaniko"
+	"github.com/drone/drone-kaniko/pkg/artifact"
 )
 
 const (
@@ -19,8 +21,11 @@ const (
 	dockerPath       string = "/kaniko/.docker"
 	dockerConfigPath string = "/kaniko/.docker/config.json"
 
-	v1Registry string = "https://index.docker.io/v1/" // Default registry
-	v2Registry string = "https://index.docker.io/v2/" // v2 registry is not supported
+	v1RegistryURL    string = "https://index.docker.io/v1/" // Default registry
+	v2RegistryURL    string = "https://index.docker.io/v2/" // v2 registry is not supported
+	v2HubRegistryURL string = "https://registry.hub.docker.com/v2/"
+
+	defaultDigestFile string = "/kaniko/digest-file"
 )
 
 var (
@@ -30,7 +35,9 @@ var (
 func main() {
 	// Load env-file if it exists first
 	if env := os.Getenv("PLUGIN_ENV_FILE"); env != "" {
-		godotenv.Load(env)
+		if err := godotenv.Load(env); err != nil {
+			logrus.Fatal(err)
+		}
 	}
 
 	app := cli.NewApp()
@@ -51,6 +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",
@@ -58,6 +75,31 @@ func main() {
 			EnvVar:   "PLUGIN_TAGS",
 			FilePath: ".tags",
 		},
+		cli.BoolFlag{
+			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:   "dockerconfig",
+			Usage:  "docker json dockerconfig",
+			EnvVar: "PLUGIN_CONFIG",
+		},
+		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",
@@ -81,9 +123,14 @@ func main() {
 		cli.StringFlag{
 			Name:   "registry",
 			Usage:  "docker registry",
-			Value:  v1Registry,
+			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",
@@ -119,6 +166,41 @@ func main() {
 			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:   "tar-path",
+			Usage:  "Set this flag to save the image as a tarball at path",
+			EnvVar: "PLUGIN_TAR_PATH",
+		},
+		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",
+		},
+		cli.StringFlag{
+			Name:   "output-file",
+			Usage:  "Output file location that will be generated by the plugin. This file will include information of the output that are exported by the plugin.",
+			EnvVar: "DRONE_OUTPUT",
+		},
 	}
 
 	if err := app.Run(os.Args); err != nil {
@@ -127,25 +209,58 @@ func main() {
 }
 
 func run(c *cli.Context) error {
-	err := createDockerCfgFile(c.String("username"), c.String("password"), c.String("registry"))
-	if err != nil {
-		return err
+	username := c.String("username")
+	noPush := c.Bool("no-push")
+	configOverride := c.String("dockerconfig")
+
+	// if configOverride is provided, use this for docker auth
+	if len(configOverride) > 0 {
+		if err := writeDockerCfgFile([]byte(configOverride)); err != nil {
+			return err
+		}
+	} else if !noPush || username != "" {
+		// setup auth when pushing or credentials are defined and docker config override is false
+		if err := createDockerCfgFile(username, c.String("password"), c.String("registry")); err != nil {
+			return err
+		}
 	}
 
 	plugin := kaniko.Plugin{
 		Build: kaniko.Build{
-			Dockerfile:    c.String("dockerfile"),
-			Context:       c.String("context"),
-			Tags:          c.StringSlice("tags"),
-			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"),
+			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,
+			TarPath:          c.String("tar-path"),
+			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"), c.Bool("expand-repo")),
+			Registry:     c.String("registry"),
+			ArtifactFile: c.String("artifact-file"),
+			RegistryType: artifact.Docker,
+		},
+		Output: kaniko.Output{
+			OutputFile: c.String("output-file"),
 		},
 	}
 	return plugin.Exec()
@@ -163,23 +278,47 @@ func createDockerCfgFile(username, password, registry string) error {
 		return fmt.Errorf("Registry must be specified")
 	}
 
-	if registry == v2Registry {
+	if registry == v2RegistryURL || registry == v2HubRegistryURL {
 		fmt.Println("Docker v2 registry is not supported in kaniko. Refer issue: https://github.com/GoogleContainerTools/kaniko/issues/1209")
-		fmt.Printf("Using v1 registry instead: %s\n", v1Registry)
-		registry = v1Registry
-	}
-
-	err := os.MkdirAll(dockerPath, 0600)
-	if err != nil {
-		return errors.Wrap(err, fmt.Sprintf("failed to create %s directory", dockerPath))
+		fmt.Printf("Using v1 registry instead: %s\n", v1RegistryURL)
+		registry = v1RegistryURL
 	}
 
 	authBytes := []byte(fmt.Sprintf("%s:%s", username, password))
 	encodedString := base64.StdEncoding.EncodeToString(authBytes)
 	jsonBytes := []byte(fmt.Sprintf(`{"auths": {"%s": {"auth": "%s"}}}`, registry, encodedString))
+
+	if err := writeDockerCfgFile(jsonBytes); err != nil {
+		return errors.Wrap(err, "failed to write docker config file")
+	}
+	return nil
+}
+
+// Write json bytes in the docker config file
+func writeDockerCfgFile(jsonBytes []byte) error {
+	err := os.MkdirAll(dockerPath, 0600)
+	if err != nil {
+		return errors.Wrap(err, fmt.Sprintf("failed to create %s directory", dockerPath))
+	}
 	err = ioutil.WriteFile(dockerConfigPath, jsonBytes, 0644)
 	if err != nil {
 		return errors.Wrap(err, "failed to create docker config file")
 	}
 	return nil
 }
+
+func buildRepo(registry, repo string, expandRepo bool) string {
+	if !expandRepo || registry == "" || registry == v1RegistryURL {
+		// No custom registry, just return the repo name
+		return repo
+	}
+	// 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
+	}
+	// Prefix the repo with the registry
+	return registry + "/" + repo
+}

cmd/kaniko-docker/main_test.go

@@ -0,0 +1,37 @@
+package main
+
+import "testing"
+
+func Test_buildRepo(t *testing.T) {
+	tests := []struct {
+		name     string
+		registry string
+		repo     string
+		want     string
+	}{
+		{
+			name: "dockerhub",
+			repo: "golang",
+			want: "golang",
+		},
+		{
+			name:     "internal",
+			registry: "artifactory.example.com",
+			repo:     "service",
+			want:     "artifactory.example.com/service",
+		},
+		{
+			name:     "backward_compatibility",
+			registry: "artifactory.example.com",
+			repo:     "artifactory.example.com/service",
+			want:     "artifactory.example.com/service",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			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

@@ -1,39 +1,63 @@
 package main
 
 import (
+	"context"
+	"encoding/base64"
+	"encoding/json"
 	"fmt"
 	"io/ioutil"
 	"os"
+	"strings"
 
+	"github.com/aws/aws-sdk-go-v2/aws"
+	"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"
+	ecrpublicv1 "github.com/aws/aws-sdk-go/service/ecrpublic"
+	"github.com/aws/smithy-go"
+	"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 (
 	accessKeyEnv     string = "AWS_ACCESS_KEY_ID"
 	secretKeyEnv     string = "AWS_SECRET_ACCESS_KEY"
 	dockerConfigPath string = "/kaniko/.docker/config.json"
+	ecrPublicDomain  string = "public.ecr.aws"
+	kanikoVersionEnv string = "KANIKO_VERSION"
+
+	oneDotEightVersion string = "1.8.0"
+	defaultDigestFile  string = "/kaniko/digest-file"
 )
 
 var (
-	version = "unknown"
+	pluginVersion = "unknown"
 )
 
 func main() {
 	// Load env-file if it exists first
 	if env := os.Getenv("PLUGIN_ENV_FILE"); env != "" {
-		godotenv.Load(env)
+		if err := godotenv.Load(env); err != nil {
+			logrus.Fatal(err)
+		}
 	}
 
 	app := cli.NewApp()
 	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",
@@ -41,12 +65,37 @@ func main() {
 			Value:  "Dockerfile",
 			EnvVar: "PLUGIN_DOCKERFILE",
 		},
+		cli.StringFlag{
+			Name:   "docker-registry",
+			Usage:  "docker registry",
+			EnvVar: "PLUGIN_DOCKER_REGISTRY,DOCKER_REGISTRY",
+		},
+		cli.StringFlag{
+			Name:   "docker-username",
+			Usage:  "docker username",
+			EnvVar: "PLUGIN_USERNAME,DOCKER_USERNAME",
+		},
+		cli.StringFlag{
+			Name:   "docker-password",
+			Usage:  "docker password",
+			EnvVar: "PLUGIN_PASSWORD,DOCKER_PASSWORD",
+		},
 		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",
@@ -54,6 +103,21 @@ func main() {
 			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",
@@ -69,6 +133,17 @@ func main() {
 			Usage:  "docker repository",
 			EnvVar: "PLUGIN_REPO",
 		},
+		cli.BoolFlag{
+			Name:   "create-repository",
+			Usage:  "create ECR repository",
+			EnvVar: "PLUGIN_CREATE_REPOSITORY",
+		},
+		cli.StringFlag{
+			Name:   "region",
+			Usage:  "AWS region",
+			Value:  "us-east-1",
+			EnvVar: "PLUGIN_REGION",
+		},
 		cli.StringSliceFlag{
 			Name:   "custom-labels",
 			Usage:  "additional k=v labels",
@@ -79,6 +154,11 @@ 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",
@@ -89,11 +169,31 @@ 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",
 			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",
@@ -101,7 +201,7 @@ func main() {
 		},
 		cli.StringFlag{
 			Name:   "cache-repo",
-			Usage:  "Remote repository that will be used to store cached layers. enable-cache needs to be set to use this flag",
+			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{
@@ -109,6 +209,31 @@ func main() {
 			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 {
@@ -117,51 +242,345 @@ func main() {
 }
 
 func run(c *cli.Context) error {
-	err := setupECRAuth(c.String("access-key"), c.String("secret-key"), c.String("registry"))
+	repo := c.String("repo")
+	registry := c.String("registry")
+	region := c.String("region")
+	noPush := c.Bool("no-push")
+	assumeRole := c.String("assume-role")
+	externalId := c.String("external-id")
+
+	dockerConfig, err := createDockerConfig(
+		c.String("docker-registry"),
+		c.String("docker-username"),
+		c.String("docker-password"),
+		c.String("access-key"),
+		c.String("secret-key"),
+		registry,
+		assumeRole,
+		externalId,
+		region,
+		noPush,
+	)
 	if err != nil {
 		return err
 	}
 
+	jsonBytes, err := json.Marshal(dockerConfig)
+	if err != nil {
+		return err
+	}
+
+	if err := ioutil.WriteFile(dockerConfigPath, jsonBytes, 0644); err != nil {
+		return err
+	}
+
+	// only create repository when pushing and create-repository is true
+	if !noPush && c.Bool("create-repository") {
+		if err := createRepository(region, repo, registry, assumeRole, externalId); err != nil {
+			return err
+		}
+	}
+
+	if c.IsSet("lifecycle-policy") {
+		contents, err := ioutil.ReadFile(c.String("lifecycle-policy"))
+		if err != nil {
+			logrus.Fatal(err)
+		}
+		if err := uploadLifeCyclePolicy(region, repo, string(contents), assumeRole, externalId); err != nil {
+			logrus.Fatal(fmt.Sprintf("error uploading ECR lifecycle policy: %v", err))
+		}
+	}
+
+	if c.IsSet("repository-policy") {
+		contents, err := ioutil.ReadFile(c.String("repository-policy"))
+		if err != nil {
+			logrus.Fatal(err)
+		}
+		if err := uploadRepositoryPolicy(region, repo, registry, string(contents), assumeRole, externalId); err != nil {
+			logrus.Fatal(fmt.Sprintf("error uploading ECR lifecycle policy: %v", err))
+		}
+	}
+
 	plugin := kaniko.Plugin{
 		Build: kaniko.Build{
-			Dockerfile:   c.String("dockerfile"),
-			Context:      c.String("context"),
+			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"),
-			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:    c.String("cache-repo"),
-			CacheTTL:     c.Int("cache-ttl"),
+			Repo:         c.String("repo"),
+			Registry:     c.String("registry"),
+			ArtifactFile: c.String("artifact-file"),
+			RegistryType: artifact.ECR,
 		},
 	}
 	return plugin.Exec()
 }
 
-func setupECRAuth(accessKey, secretKey, registry string) error {
+func createDockerConfig(dockerRegistry, dockerUsername, dockerPassword, accessKey, secretKey,
+	registry, assumeRole, externalId, region string, noPush bool) (*docker.Config, error) {
+	dockerConfig := docker.NewConfig()
+
+	if dockerUsername != "" {
+		// if no docker registry provided, use dockerhub by default
+		if len(dockerRegistry) == 0 {
+			dockerRegistry = docker.RegistryV1
+		}
+		dockerConfig.SetAuth(dockerRegistry, dockerUsername, dockerPassword)
+	}
+
+	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")
+		}
+
+		// If IAM role is used, access key & secret key are not required
+		if accessKey != "" && secretKey != "" {
+			err := os.Setenv(accessKeyEnv, accessKey)
+			if err != nil {
+				return nil, errors.Wrap(err, fmt.Sprintf("failed to set %s environment variable", accessKeyEnv))
+			}
+
+			err = os.Setenv(secretKeyEnv, secretKey)
+			if err != nil {
+				return nil, errors.Wrap(err, fmt.Sprintf("failed to set %s environment variable", secretKeyEnv))
+			}
+		}
+
+		// 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
+}
+
+func createRepository(region, repo, registry, assumeRole, externalId string) error {
 	if registry == "" {
-		return fmt.Errorf("Registry must be specified")
+		return fmt.Errorf("registry must be specified")
 	}
 
-	// If IAM role is used, access key & secret key are not required
-	if accessKey != "" && secretKey != "" {
-		err := os.Setenv(accessKeyEnv, accessKey)
-		if err != nil {
-			return errors.Wrap(err, fmt.Sprintf("failed to set %s environment variable", accessKeyEnv))
-		}
+	if repo == "" {
+		return fmt.Errorf("repo must be specified")
+	}
 
-		err = os.Setenv(secretKeyEnv, secretKey)
+	var createErr error
+
+	if assumeRole != "" {
+		if isRegistryPublic(registry) {
+			_, createErr = getAssumeRoleEcrPublicSvc(region, assumeRole, externalId).CreateRepository(&ecrpublicv1.CreateRepositoryInput{RepositoryName: &repo})
+		} else {
+			_, createErr = getAssumeRoleEcrSvc(region, assumeRole, externalId).CreateRepository(&ecrv1.CreateRepositoryInput{RepositoryName: &repo})
+		}
+	} else {
+		cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithRegion(region))
 		if err != nil {
-			return errors.Wrap(err, fmt.Sprintf("failed to set %s environment variable", secretKeyEnv))
+			return errors.Wrap(err, "failed to load aws config")
+		}
+		//create public repo
+		//if registry string starts with public domain (ex: public.ecr.aws/example-registry)
+		if isRegistryPublic(registry) {
+			svc := ecrpublic.NewFromConfig(cfg)
+			_, createErr = svc.CreateRepository(context.TODO(), &ecrpublic.CreateRepositoryInput{RepositoryName: &repo})
+			//create private repo
+		} else {
+			svc := ecr.NewFromConfig(cfg)
+			_, createErr = svc.CreateRepository(context.TODO(), &ecr.CreateRepositoryInput{RepositoryName: &repo})
 		}
 	}
 
-	jsonBytes := []byte(fmt.Sprintf(`{"credStore": "ecr-login", "credHelpers": {"%s": "ecr-login"}}`, registry))
-	err := ioutil.WriteFile(dockerConfigPath, jsonBytes, 0644)
-	if err != nil {
-		return errors.Wrap(err, "failed to create docker config file")
+	var apiError smithy.APIError
+	if errors.As(createErr, &apiError) && apiError.ErrorCode() != "RepositoryAlreadyExistsException" {
+		return errors.Wrap(createErr, "failed to create repository")
 	}
+
 	return nil
 }
+
+func uploadLifeCyclePolicy(region, repo, lifecyclePolicy, assumeRole, externalId string) (err error) {
+	if assumeRole != "" {
+		input := &ecrv1.PutLifecyclePolicyInput{
+			LifecyclePolicyText: aws.String(lifecyclePolicy),
+			RepositoryName:      aws.String(repo),
+		}
+		_, err = getAssumeRoleEcrSvc(region, assumeRole, externalId).PutLifecyclePolicy(input)
+	} else {
+		cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithRegion(region))
+		if err != nil {
+			return errors.Wrap(err, "failed to load aws config")
+		}
+
+		svc := ecr.NewFromConfig(cfg)
+
+		input := &ecr.PutLifecyclePolicyInput{
+			LifecyclePolicyText: aws.String(lifecyclePolicy),
+			RepositoryName:      aws.String(repo),
+		}
+		_, err = svc.PutLifecyclePolicy(context.TODO(), input)
+	}
+
+	return err
+}
+
+func uploadRepositoryPolicy(region, repo, registry, repositoryPolicy, assumeRole, externalId string) (err error) {
+	if assumeRole != "" {
+		if isRegistryPublic(registry) {
+			input := &ecrpublicv1.SetRepositoryPolicyInput{
+				PolicyText:     aws.String(repositoryPolicy),
+				RepositoryName: aws.String(repo),
+			}
+			_, err = getAssumeRoleEcrPublicSvc(region, assumeRole, externalId).SetRepositoryPolicy(input)
+		} else {
+			input := &ecrv1.SetRepositoryPolicyInput{
+				PolicyText:     aws.String(repositoryPolicy),
+				RepositoryName: aws.String(repo),
+			}
+			_, err = getAssumeRoleEcrSvc(region, assumeRole, externalId).SetRepositoryPolicy(input)
+		}
+	} else {
+		cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithRegion(region))
+		if err != nil {
+			return errors.Wrap(err, "failed to load aws config")
+		}
+
+		if isRegistryPublic(registry) {
+			svc := ecrpublic.NewFromConfig(cfg)
+			input := &ecrpublic.SetRepositoryPolicyInput{
+				PolicyText:     aws.String(repositoryPolicy),
+				RepositoryName: aws.String(repo),
+			}
+			_, err = svc.SetRepositoryPolicy(context.TODO(), input)
+		} else {
+			svc := ecr.NewFromConfig(cfg)
+			input := &ecr.SetRepositoryPolicyInput{
+				PolicyText:     aws.String(repositoryPolicy),
+				RepositoryName: aws.String(repo),
+			}
+			_, err = svc.SetRepositoryPolicy(context.TODO(), input)
+		}
+	}
+
+	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: no basic auth credentials")
+	}
+	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 getAssumeRoleEcrSvc(region, assumeRole, externalId string) *ecrv1.ECR {
+	sess, err := session.NewSession(&awsv1.Config{Region: &region})
+	if err != nil {
+		logrus.Fatal(err, "failed to create aws session")
+	}
+
+	return ecrv1.New(sess, &awsv1.Config{
+		Credentials: stscreds.NewCredentials(sess, assumeRole, func(p *stscreds.AssumeRoleProvider) {
+			if externalId != "" {
+				p.ExternalID = &externalId
+			}
+		}),
+	})
+}
+
+func getAssumeRoleEcrPublicSvc(region, assumeRole, externalId string) *ecrpublicv1.ECRPublic {
+	sess, err := session.NewSession(&awsv1.Config{Region: &region})
+	if err != nil {
+		logrus.Fatal(err, "failed to create aws session")
+	}
+
+	return ecrpublicv1.New(sess, &awsv1.Config{
+		Credentials: stscreds.NewCredentials(sess, assumeRole, func(p *stscreds.AssumeRoleProvider) {
+			if externalId != "" {
+				p.ExternalID = &externalId
+			}
+		}),
+	})
+}
+
+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

@@ -0,0 +1,129 @@
+package main
+
+import (
+	"os"
+	"reflect"
+	"testing"
+
+	"github.com/drone/drone-kaniko/pkg/docker"
+)
+
+func TestCreateDockerConfig(t *testing.T) {
+	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")
+	want.SetCredHelper(docker.RegistryECRPublic, "ecr-login")
+	want.SetCredHelper("ecr-registry", "ecr-login")
+
+	if !reflect.DeepEqual(want, got) {
+		t.Errorf("not equal:\n  want: %#v\n   got: %#v", want, got)
+	}
+}
+
+func TestCreateDockerConfigFromGivenRegistry(t *testing.T) {
+	got, err := createDockerConfig(
+		"docker-registry",
+		"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-registry", "docker-username", "docker-password")
+	want.SetCredHelper(docker.RegistryECRPublic, "ecr-login")
+	want.SetCredHelper("ecr-registry", "ecr-login")
+	if !reflect.DeepEqual(want, got) {
+		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-gar/main.go

@@ -0,0 +1,234 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"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"
+)
+
+const (
+	// GAR JSON key file path
+	garKeyPath     string = "/kaniko/config.json"
+	garEnvVariable string = "GOOGLE_APPLICATION_CREDENTIALS"
+
+	defaultDigestFile string = "/kaniko/digest-file"
+)
+
+var (
+	version = "unknown"
+)
+
+func main() {
+	// Load env-file if it exists first
+	if env := os.Getenv("PLUGIN_ENV_FILE"); env != "" {
+		if err := godotenv.Load(env); err != nil {
+			logrus.Fatal(err)
+		}
+	}
+
+	app := cli.NewApp()
+	app.Name = "kaniko gar plugin"
+	app.Usage = "kaniko gar plugin"
+	app.Action = run
+	app.Version = version
+	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:  "gar repository",
+			EnvVar: "PLUGIN_REPO",
+		},
+		cli.StringSliceFlag{
+			Name:   "custom-labels",
+			Usage:  "additional k=v labels",
+			EnvVar: "PLUGIN_CUSTOM_LABELS",
+		},
+		cli.StringFlag{
+			Name:   "registry",
+			Usage:  "gar registry",
+			EnvVar: "PLUGIN_REGISTRY",
+		},
+		cli.StringSliceFlag{
+			Name:   "registry-mirrors",
+			Usage:  "docker registry mirrors",
+			EnvVar: "PLUGIN_REGISTRY_MIRRORS",
+		},
+		cli.StringFlag{
+			Name:   "json-key",
+			Usage:  "docker username",
+			EnvVar: "PLUGIN_JSON_KEY",
+		},
+		cli.StringFlag{
+			Name:   "snapshot-mode",
+			Usage:  "Specify one of full, redo or time as snapshot mode",
+			EnvVar: "PLUGIN_SNAPSHOT_MODE",
+		},
+		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 as --verbosity=<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 {
+	noPush := c.Bool("no-push")
+	jsonKey := c.String("json-key")
+
+	// JSON key may not be set in the following cases:
+	// 1. Image does not need to be pushed to GAR.
+	// 2. Workload identity is set on GKE in which pod will inherit the credentials via service account.
+	if jsonKey != "" {
+		if err := setupGARAuth(jsonKey); 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:             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"),
+			Repo:         c.String("repo"),
+			Registry:     c.String("registry"),
+			ArtifactFile: c.String("artifact-file"),
+			RegistryType: artifact.GAR,
+		},
+	}
+	return plugin.Exec()
+}
+
+func setupGARAuth(jsonKey string) error {
+	err := ioutil.WriteFile(garKeyPath, []byte(jsonKey), 0644)
+	if err != nil {
+		return errors.Wrap(err, "failed to write GAR JSON key")
+	}
+
+	err = os.Setenv(garEnvVariable, garKeyPath)
+	if err != nil {
+		return errors.Wrap(err, fmt.Sprintf("failed to set %s environment variable", garEnvVariable))
+	}
+	return nil
+}

cmd/kaniko-gcr/main.go

@@ -11,12 +11,15 @@ import (
 	"github.com/urfave/cli"
 
 	kaniko "github.com/drone/drone-kaniko"
+	"github.com/drone/drone-kaniko/pkg/artifact"
 )
 
 const (
 	// GCR JSON key file path
 	gcrKeyPath     string = "/kaniko/config.json"
 	gcrEnvVariable string = "GOOGLE_APPLICATION_CREDENTIALS"
+
+	defaultDigestFile string = "/kaniko/digest-file"
 )
 
 var (
@@ -26,7 +29,9 @@ var (
 func main() {
 	// Load env-file if it exists first
 	if env := os.Getenv("PLUGIN_ENV_FILE"); env != "" {
-		godotenv.Load(env)
+		if err := godotenv.Load(env); err != nil {
+			logrus.Fatal(err)
+		}
 	}
 
 	app := cli.NewApp()
@@ -47,6 +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",
@@ -54,6 +69,21 @@ func main() {
 			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",
@@ -80,6 +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",
@@ -97,7 +132,7 @@ func main() {
 		},
 		cli.StringFlag{
 			Name:   "cache-repo",
-			Usage:  "Remote repository that will be used to store cached layers. enable-cache needs to be set to use this flag",
+			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{
@@ -105,6 +140,31 @@ func main() {
 			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 as --verbosity=<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 {
@@ -113,38 +173,55 @@ func main() {
 }
 
 func run(c *cli.Context) error {
-	err := setupGCRAuth(c.String("json-key"))
-	if err != nil {
-		return err
-	}
+	noPush := c.Bool("no-push")
+	jsonKey := c.String("json-key")
 
-	if c.String("repo") == "" {
-		return fmt.Errorf("repo must be specified")
+	// JSON key may not be set in the following cases:
+	// 1. Image does not need to be pushed to GCR.
+	// 2. Workload identity is set on GKE in which pod will inherit the credentials via service account.
+	if jsonKey != "" {
+		if err := setupGCRAuth(jsonKey); err != nil {
+			return err
+		}
 	}
 
 	plugin := kaniko.Plugin{
 		Build: kaniko.Build{
-			Dockerfile:   c.String("dockerfile"),
-			Context:      c.String("context"),
+			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"),
-			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:    c.String("cache-repo"),
-			CacheTTL:     c.Int("cache-ttl"),
+			Repo:         c.String("repo"),
+			Registry:     c.String("registry"),
+			ArtifactFile: c.String("artifact-file"),
+			RegistryType: artifact.GCR,
 		},
 	}
 	return plugin.Exec()
 }
 
 func setupGCRAuth(jsonKey string) error {
-	if jsonKey == "" {
-		return fmt.Errorf("GCR JSON key must be specified")
-	}
-
 	err := ioutil.WriteFile(gcrKeyPath, []byte(jsonKey), 0644)
 	if err != nil {
 		return errors.Wrap(err, "failed to write GCR JSON key")

docker/acr/Dockerfile.linux.amd64

@@ -0,0 +1,5 @@
+FROM gcr.io/kaniko-project/executor:v1.19.2
+
+ENV KANIKO_VERSION=1.19.2
+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:v1.19.2
+
+ENV HOME /root
+ENV USER root
+
+ENV KANIKO_VERSION=1.19.2
+ADD release/linux/arm64/kaniko-acr /kaniko/
+ENTRYPOINT ["/kaniko/kaniko-acr"]

docker/acr/manifest.tmpl

@@ -0,0 +1,18 @@
+image: plugins/kaniko-acr:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}latest{{/if}}
+{{#if build.tags}}
+tags:
+{{#each build.tags}}
+  - {{this}}
+{{/each}}
+{{/if}}
+manifests:
+  -
+    image: plugins/kaniko-acr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64
+    platform:
+      architecture: amd64
+      os: linux
+  -
+    image: plugins/kaniko-acr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64
+    platform:
+      architecture: arm64
+      os: linux

docker/docker/Dockerfile.linux.amd64

@@ -1,4 +1,5 @@
-FROM gcr.io/kaniko-project/executor:v1.3.0
+FROM gcr.io/kaniko-project/executor:v1.19.2
 
+ENV KANIKO_VERSION=1.19.2
 ADD release/linux/amd64/kaniko-docker /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-docker"]

docker/docker/Dockerfile.linux.amd64.kaniko1.9.1

@@ -0,0 +1,5 @@
+FROM gcr.io/kaniko-project/executor:v1.9.1
+
+ENV KANIKO_VERSION=1.9.1
+ADD release/linux/amd64/kaniko-docker /kaniko/
+ENTRYPOINT ["/kaniko/kaniko-docker"]

docker/docker/Dockerfile.linux.arm64

@@ -1,7 +1,8 @@
-FROM gcr.io/kaniko-project/executor:arm64-v1.3.0
+FROM gcr.io/kaniko-project/executor:v1.19.2
 
 ENV HOME /root
 ENV USER root
 
+ENV KANIKO_VERSION=1.19.2
 ADD release/linux/arm64/kaniko-docker /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-docker"]

docker/docker/Dockerfile.linux.arm64.kaniko1.9.1

@@ -0,0 +1,5 @@
+FROM gcr.io/kaniko-project/executor:v1.9.1
+
+ENV KANIKO_VERSION=1.9.1
+ADD release/linux/arm64/kaniko-docker /kaniko/
+ENTRYPOINT ["/kaniko/kaniko-docker"]

docker/docker/manifest-kaniko1.9.1.tmpl

@@ -0,0 +1,18 @@
+image: plugins/kaniko:{{#if build.tag}}{{trimPrefix "v" build.tag}}-kaniko1.9.1{{else}}latest-kaniko1.9.1{{/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-kaniko1.9.1
+    platform:
+      architecture: amd64
+      os: linux
+  -
+    image: plugins/kaniko:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64-kaniko1.9.1
+    platform:
+      architecture: arm64
+      os: linux

docker/docker/manifest.tmpl

@@ -11,3 +11,8 @@ manifests:
     platform:
       architecture: amd64
       os: linux
+  -
+    image: plugins/kaniko:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64
+    platform:
+      architecture: arm64
+      os: linux

docker/ecr/Dockerfile.linux.amd64

@@ -1,4 +1,5 @@
-FROM gcr.io/kaniko-project/executor:v1.3.0
+FROM gcr.io/kaniko-project/executor:v1.19.2
 
+ENV KANIKO_VERSION=1.19.2
 ADD release/linux/amd64/kaniko-ecr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-ecr"]

docker/ecr/Dockerfile.linux.amd64.kaniko1.9.1

@@ -0,0 +1,5 @@
+FROM gcr.io/kaniko-project/executor:v1.9.1
+
+ENV KANIKO_VERSION=1.9.1
+ADD release/linux/amd64/kaniko-ecr /kaniko/
+ENTRYPOINT ["/kaniko/kaniko-ecr"]

docker/ecr/Dockerfile.linux.arm64

@@ -1,7 +1,8 @@
-FROM gcr.io/kaniko-project/executor:arm64-v1.3.0
+FROM gcr.io/kaniko-project/executor:v1.19.2
 
 ENV HOME /root
 ENV USER root
+ENV KANIKO_VERSION=1.19.2
 
 ADD release/linux/arm64/kaniko-ecr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-ecr"]

docker/ecr/Dockerfile.linux.arm64.kaniko1.9.1

@@ -0,0 +1,5 @@
+FROM gcr.io/kaniko-project/executor:v1.9.1
+
+ENV KANIKO_VERSION=1.9.1
+ADD release/linux/arm64/kaniko-ecr /kaniko/
+ENTRYPOINT ["/kaniko/kaniko-ecr"]

docker/ecr/manifest-kaniko1.9.1.tmpl

@@ -0,0 +1,18 @@
+image: plugins/kaniko-ecr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-kaniko1.9.1{{else}}latest-kaniko1.9.1{{/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-kaniko1.9.1
+    platform:
+      architecture: amd64
+      os: linux
+  -
+    image: plugins/kaniko-ecr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64-kaniko1.9.1
+    platform:
+      architecture: arm64
+      os: linux

docker/ecr/manifest.tmpl

@@ -10,4 +10,9 @@ manifests:
     image: plugins/kaniko-ecr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64
     platform:
       architecture: amd64
+      os: linux
+  -
+    image: plugins/kaniko-ecr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64
+    platform:
+      architecture: arm64
       os: linux

docker/gar/Dockerfile.linux.amd64

@@ -0,0 +1,5 @@
+FROM gcr.io/kaniko-project/executor:v1.19.2
+
+ENV KANIKO_VERSION=1.19.2
+ADD release/linux/amd64/kaniko-gar /kaniko/
+ENTRYPOINT ["/kaniko/kaniko-gar"]

docker/gar/Dockerfile.linux.amd64.kaniko1.9.1

@@ -0,0 +1,5 @@
+FROM gcr.io/kaniko-project/executor:v1.9.1
+
+ENV KANIKO_VERSION=1.9.1
+ADD release/linux/amd64/kaniko-gar /kaniko/
+ENTRYPOINT ["/kaniko/kaniko-gar"]

docker/gar/Dockerfile.linux.arm64

@@ -0,0 +1,8 @@
+FROM gcr.io/kaniko-project/executor:v1.19.2
+
+ENV HOME /root
+ENV USER root
+ENV KANIKO_VERSION=1.19.2
+
+ADD release/linux/arm64/kaniko-gar /kaniko/
+ENTRYPOINT ["/kaniko/kaniko-gar"]

docker/gar/Dockerfile.linux.arm64.kaniko1.9.1

@@ -0,0 +1,5 @@
+FROM gcr.io/kaniko-project/executor:v1.9.1
+
+ENV KANIKO_VERSION=1.9.1
+ADD release/linux/arm64/kaniko-gar /kaniko/
+ENTRYPOINT ["/kaniko/kaniko-gar"]

docker/gar/manifest-kaniko1.9.1.tmpl

@@ -0,0 +1,18 @@
+image: plugins/kaniko-gar:{{#if build.tag}}{{trimPrefix "v" build.tag}}-kaniko1.9.1{{else}}latest-kaniko1.9.1{{/if}}
+{{#if build.tags}}
+tags:
+{{#each build.tags}}
+  - {{this}}
+{{/each}}
+{{/if}}
+manifests:
+  -
+    image: plugins/kaniko-gar:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64-kaniko1.9.1
+    platform:
+      architecture: amd64
+      os: linux
+  -
+    image: plugins/kaniko-gar:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64-kaniko1.9.1
+    platform:
+      architecture: arm64
+      os: linux

docker/gar/manifest.tmpl

@@ -0,0 +1,18 @@
+image: plugins/kaniko-gar:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}latest{{/if}}
+{{#if build.tags}}
+tags:
+{{#each build.tags}}
+  - {{this}}
+{{/each}}
+{{/if}}
+manifests:
+  -
+    image: plugins/kaniko-gar:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64
+    platform:
+      architecture: amd64
+      os: linux
+  -
+    image: plugins/kaniko-gar:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64
+    platform:
+      architecture: arm64
+      os: linux

docker/gcr/Dockerfile.linux.amd64

@@ -1,4 +1,5 @@
-FROM gcr.io/kaniko-project/executor:v1.3.0
+FROM gcr.io/kaniko-project/executor:v1.19.2
 
+ENV KANIKO_VERSION=1.19.2
 ADD release/linux/amd64/kaniko-gcr /kaniko/
-ENTRYPOINT ["/kaniko/kaniko-gcr"]
+ENTRYPOINT ["/kaniko/kaniko-gcr"]

docker/gcr/Dockerfile.linux.amd64.kaniko1.9.1

@@ -0,0 +1,5 @@
+FROM gcr.io/kaniko-project/executor:v1.9.1
+
+ENV KANIKO_VERSION=1.9.1
+ADD release/linux/amd64/kaniko-gcr /kaniko/
+ENTRYPOINT ["/kaniko/kaniko-gcr"]

docker/gcr/Dockerfile.linux.arm64

@@ -1,7 +1,8 @@
-FROM gcr.io/kaniko-project/executor:arm64-v1.3.0
+FROM gcr.io/kaniko-project/executor:v1.19.2
 
 ENV HOME /root
 ENV USER root
+ENV KANIKO_VERSION=1.19.2
 
 ADD release/linux/arm64/kaniko-gcr /kaniko/
-ENTRYPOINT ["/kaniko/kaniko-gcr"]
+ENTRYPOINT ["/kaniko/kaniko-gcr"]

docker/gcr/Dockerfile.linux.arm64.kaniko1.9.1

@@ -0,0 +1,5 @@
+FROM gcr.io/kaniko-project/executor:v1.9.1
+
+ENV KANIKO_VERSION=1.9.1
+ADD release/linux/arm64/kaniko-gcr /kaniko/
+ENTRYPOINT ["/kaniko/kaniko-gcr"]

docker/gcr/manifest-kaniko1.9.1.tmpl

@@ -0,0 +1,18 @@
+image: plugins/kaniko-gcr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-kaniko1.9.1{{else}}latest-kaniko1.9.1{{/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-kaniko1.9.1
+    platform:
+      architecture: amd64
+      os: linux
+  -
+    image: plugins/kaniko-gcr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64-kaniko1.9.1
+    platform:
+      architecture: arm64
+      os: linux

docker/gcr/manifest.tmpl

@@ -11,3 +11,8 @@ manifests:
     platform:
       architecture: amd64
       os: linux
+  -
+    image: plugins/kaniko-gcr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64
+    platform:
+      architecture: arm64
+      os: linux

go.mod

@@ -1,10 +1,46 @@
 module github.com/drone/drone-kaniko
 
 require (
-	github.com/joho/godotenv v1.3.0
+	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.1.1
+	github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.1.0
+	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
+	github.com/sirupsen/logrus v1.8.1
+	github.com/urfave/cli v1.22.9
+	golang.org/x/mod v0.5.1
 )
 
-go 1.13
+require (
+	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/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 1.21

go.sum

@@ -1,32 +1,112 @@
+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/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d h1:U+s90UTSYgptZMwQh2aRr3LuazLJIa+Pg3Kc1ylSYVY=
+github.com/aws/aws-sdk-go v1.44.52 h1:kHLbYJj59C7VrsLM4gm7pxsvaNIvhXCCIDYEFFoQ+VE=
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 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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kaniko.go

@@ -2,37 +2,136 @@ package kaniko
 
 import (
 	"fmt"
+	"io/ioutil"
 	"os"
 	"os/exec"
 	"strings"
+
+	"github.com/drone/drone-kaniko/pkg/artifact"
+	"github.com/drone/drone-kaniko/pkg/output"
+	"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
-		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
+		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
+		TarPath          string   // Set this flag to save the image as a tarball at path
+	}
+
+	// Artifact defines content of artifact file
+	Artifact struct {
+		Tags         []string                  // Docker artifact tags
+		Repo         string                    // Docker artifact repository
+		Registry     string                    // Docker artifact registry
+		RegistryType artifact.RegistryTypeEnum // Rocker artifact registry type
+		ArtifactFile string                    // Artifact file location
+	}
+
+	// Output defines content of output file
+	Output struct {
+		OutputFile string // File where plugin output are saved
 	}
 
 	// Plugin defines the Docker plugin parameters.
 	Plugin struct {
-		Build Build // Docker build configuration
+		Build    Build    // Docker build configuration
+		Artifact Artifact // Artifact file content
+		Output   Output   // Output file content
 	}
 )
 
+// 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.
+func (b Build) labelsForTag(tag string) (labels []string) {
+	// We strip "v" off of the beginning of semantic versions, as they are not used in docker tags
+	const VersionPrefix = "v"
+
+	// Semantic Versions don't allow underscores, so replace them with dashes.
+	//   https://semver.org/
+	semverTag := strings.ReplaceAll(tag, "_", "-")
+
+	// Allow tags of the form "1.2.3" as well as "v1.2.3" to avoid confusion.
+	if withV := VersionPrefix + semverTag; !semver.IsValid(semverTag) && semver.IsValid(withV) {
+		semverTag = withV
+	}
+
+	// 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
+
+	// If the version is pre-release, only the full release should be tagged, not the major/minor versions.
+	if semver.Prerelease(tag) != "" {
+		return []string{
+			strings.TrimPrefix(tag, VersionPrefix),
+		}
+	}
+
+	// tagFor carries any build information from the semantic version through to major and minor tags.
+	labelFor := func(base string) string {
+		return strings.TrimPrefix(base, VersionPrefix) + semver.Build(tag)
+	}
+	return []string{
+		labelFor(semver.Major(tag)),
+		labelFor(semver.MajorMinor(tag)),
+		labelFor(semver.Canonical(tag)),
+	}
+}
+
+// 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.Repo == "" {
+	if !p.Build.NoPush && p.Build.Repo == "" {
 		return fmt.Errorf("repository name to publish image must be specified")
 	}
 
@@ -40,15 +139,32 @@ 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),
 	}
 
-	// Set the destination repository
-	for _, tag := range p.Build.Tags {
-		cmdArgs = append(cmdArgs, fmt.Sprintf("--destination=%s:%s", p.Build.Repo, tag))
+	// Set the destination repository only when we push or save to tarball
+	if !p.Build.NoPush || p.Build.TarPath != "" {
+		for _, tag := range tags {
+			for _, label := range p.Build.labelsForTag(tag) {
+				cmdArgs = append(cmdArgs, fmt.Sprintf("--destination=%s:%s", p.Build.Repo, label))
+			}
+		}
 	}
+
 	// Set the build arguments
 	for _, arg := range p.Build.Args {
 		cmdArgs = append(cmdArgs, fmt.Sprintf("--build-arg=%s", arg))
@@ -57,38 +173,90 @@ 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))
 	}
 
 	if p.Build.SkipTlsVerify {
-		cmdArgs = append(cmdArgs, fmt.Sprintf("--skip-tls-verify=true"))
+		cmdArgs = append(cmdArgs, "--skip-tls-verify=true")
 	}
 
 	if p.Build.SnapshotMode != "" {
 		cmdArgs = append(cmdArgs, fmt.Sprintf("--snapshotMode=%s", p.Build.SnapshotMode))
 	}
 
-	if p.Build.EnableCache == true {
-		cmdArgs = append(cmdArgs, fmt.Sprintf("--cache=true"))
-	}
+	if p.Build.EnableCache {
+		cmdArgs = append(cmdArgs, "--cache=true")
 
-	if p.Build.CacheRepo != "" {
-		cmdArgs = append(cmdArgs, fmt.Sprintf("--cache-repo=%s", p.Build.CacheRepo))
+		if p.Build.CacheRepo != "" {
+			cmdArgs = append(cmdArgs, fmt.Sprintf("--cache-repo=%s", p.Build.CacheRepo))
+		}
 	}
 
 	if p.Build.CacheTTL != 0 {
-		cmdArgs = append(cmdArgs, fmt.Sprintf("--cache-ttl=%d", p.Build.CacheTTL))
+		cmdArgs = append(cmdArgs, fmt.Sprintf("--cache-ttl=%dh", p.Build.CacheTTL))
 	}
 
+	if p.Build.DigestFile != "" {
+		cmdArgs = append(cmdArgs, fmt.Sprintf("--digest-file=%s", p.Build.DigestFile))
+	}
+
+	if p.Build.NoPush {
+		cmdArgs = append(cmdArgs, "--no-push")
+	}
+
+	if p.Build.Verbosity != "" {
+		cmdArgs = append(cmdArgs, fmt.Sprintf("--verbosity=%s", p.Build.Verbosity))
+	}
+
+	if p.Build.Platform != "" {
+		cmdArgs = append(cmdArgs, fmt.Sprintf("--customPlatform=%s", p.Build.Platform))
+	}
+
+	if p.Build.SkipUnusedStages {
+		cmdArgs = append(cmdArgs, "--skip-unused-stages")
+	}
+
+	if p.Build.TarPath != "" {
+		cmdArgs = append(cmdArgs, fmt.Sprintf("--tar-path=%s", p.Build.TarPath))
+	}
+	
 	cmd := exec.Command("/kaniko/executor", cmdArgs...)
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr
 	trace(cmd)
 
 	err := cmd.Run()
-	return err
+	if err != nil {
+		return err
+	}
+
+	if p.Build.DigestFile != "" && p.Artifact.ArtifactFile != "" {
+		err = artifact.WritePluginArtifactFile(p.Artifact.RegistryType, p.Artifact.ArtifactFile, p.Artifact.Registry, p.Artifact.Repo, getDigest(p.Build.DigestFile), p.Artifact.Tags)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "failed to write plugin artifact file at path: %s with error: %s\n", p.Artifact.ArtifactFile, err)
+		}
+	}
+
+	if p.Output.OutputFile != "" {
+		if err = output.WritePluginOutputFile(p.Output.OutputFile, getDigest(p.Build.DigestFile)); err != nil {
+			fmt.Fprintf(os.Stderr, "failed to write plugin output file at path: %s with error: %s\n", p.Output.OutputFile, err)
+		}
+	}
+
+	return nil
+}
+
+func getDigest(digestFile string) string {
+	content, err := ioutil.ReadFile(digestFile)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "failed to read digest file contents at path: %s with error: %s\n", digestFile, err)
+	}
+	return string(content)
 }
 
 // trace writes each command to stdout with the command wrapped in an xml

kaniko_test.go

@@ -1 +1,150 @@
 package kaniko
+
+import (
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func TestBuild_labelsForTag(t *testing.T) {
+	tests := []struct {
+		name       string
+		tag        string
+		expandTags []string
+	}{
+		{
+			name:       "semver",
+			tag:        "v1.2.3",
+			expandTags: []string{"1", "1.2", "1.2.3"},
+		},
+		{
+			name:       "no_patch",
+			tag:        "v1.2",
+			expandTags: []string{"1", "1.2", "1.2.0"},
+		},
+		{
+			name:       "only_major",
+			tag:        "v1",
+			expandTags: []string{"1", "1.0", "1.0.0"},
+		},
+		{
+			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",
+			expandTags: []string{"1+linux-amd64", "1.2+linux-amd64", "1.2.3+linux-amd64"},
+		},
+		{
+			name:       "prerelease",
+			tag:        "v1.2.3-rc1",
+			expandTags: []string{"1.2.3-rc1"},
+		},
+		{
+			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
+			expandTags: []string{"v1+bld"},
+		},
+		{
+			name:       "accidental_non_semver",
+			tag:        "1.2.3",
+			expandTags: []string{"1", "1.2", "1.2.3"},
+		},
+		{
+			name:       "non_semver",
+			tag:        "latest",
+			expandTags: []string{"latest"},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			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:          "beta tag push",
+			repoBranch:    "master",
+			commitRef:     "refs/tags/v1.0.0-beta.1",
+			autoTagSuffix: "",
+			expectedTags: []string{
+				"1.0.0-beta.1",
+			},
+		},
+		{
+			name:          "tag push with suffix",
+			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/artifact/artifact.go

@@ -0,0 +1,77 @@
+package artifact
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
+	"github.com/pkg/errors"
+)
+
+const (
+	dockerArtifactV1 string = "docker/v1"
+)
+
+type RegistryTypeEnum string
+
+const (
+	Docker RegistryTypeEnum = "Docker"
+	ECR    RegistryTypeEnum = "ECR"
+	GCR    RegistryTypeEnum = "GCR"
+	GAR    RegistryTypeEnum = "GAR"
+)
+
+type (
+	Image struct {
+		Image  string `json:"image"`
+		Digest string `json:"digest"`
+	}
+	Data struct {
+		RegistryType RegistryTypeEnum `json:"registryType"`
+		RegistryUrl  string           `json:"registryUrl"`
+		Images       []Image          `json:"images"`
+	}
+	DockerArtifact struct {
+		Kind string `json:"kind"`
+		Data Data   `json:"data"`
+	}
+)
+
+func WritePluginArtifactFile(registryType RegistryTypeEnum, artifactFilePath, registryUrl, imageName, digest string, tags []string) error {
+	var images []Image
+	for _, tag := range tags {
+		images = append(images, Image{
+			Image:  fmt.Sprintf("%s:%s", imageName, tag),
+			Digest: digest,
+		})
+	}
+	data := Data{
+		RegistryType: registryType,
+		RegistryUrl:  registryUrl,
+		Images:       images,
+	}
+
+	dockerArtifact := DockerArtifact{
+		Kind: dockerArtifactV1,
+		Data: data,
+	}
+
+	b, err := json.MarshalIndent(dockerArtifact, "", "\t")
+	if err != nil {
+		return errors.Wrap(err, fmt.Sprintf("failed to marshal output %+v", dockerArtifact))
+	}
+
+	dir := filepath.Dir(artifactFilePath)
+	err = os.MkdirAll(dir, 0644)
+	if err != nil {
+		return errors.Wrap(err, fmt.Sprintf("failed to create %s directory for artifact file", dir))
+	}
+
+	err = ioutil.WriteFile(artifactFilePath, b, 0644)
+	if err != nil {
+		return errors.Wrap(err, fmt.Sprintf("failed to write artifact to artifact file %s", artifactFilePath))
+	}
+	return nil
+}

pkg/artifact/artifact.json

@@ -0,0 +1,17 @@
+{
+	"kind": "docker/v1",
+	"data": {
+		"registryType": "Docker",
+		"registryUrl": "https://index.docker.io/",
+		"images": [
+			{
+				"image": "image:a1",
+				"digest": "sha256:22332233"
+			},
+			{
+				"image": "image:latest",
+				"digest": "sha256:22332233"
+			}
+		]
+	}
+}

pkg/artifact/artifact_test.go

@@ -0,0 +1,38 @@
+package artifact
+
+import (
+	"io/ioutil"
+	"testing"
+)
+
+func TestWritePluginArtifactFile(t *testing.T) {
+
+	testFile := t.TempDir() + "got.json"
+
+	err := WritePluginArtifactFile(Docker, testFile, "https://index.docker.io/", "image", "sha256:22332233", []string{"a1", "latest"})
+	if err != nil {
+		t.Error(err)
+		t.FailNow()
+	}
+
+	gotBytes, err := ioutil.ReadFile(testFile)
+	if err != nil {
+		t.Error(err)
+		t.FailNow()
+	}
+
+	wantBytes, err := ioutil.ReadFile("./artifact.json")
+	if err != nil {
+		t.Error(err)
+		t.FailNow()
+	}
+
+	got := string(gotBytes)
+	want := string(wantBytes)
+
+	if got != want {
+		t.Logf("got:%s", got)
+		t.Logf("want:%s", want)
+		t.FailNow()
+	}
+}

pkg/docker/config.go

@@ -0,0 +1,34 @@
+package docker
+
+import (
+	"encoding/base64"
+	"fmt"
+)
+
+type (
+	Auth struct {
+		Auth string `json:"auth"`
+	}
+
+	Config struct {
+		Auths       map[string]Auth   `json:"auths"`
+		CredHelpers map[string]string `json:"credHelpers"`
+	}
+)
+
+func NewConfig() *Config {
+	return &Config{
+		Auths:       map[string]Auth{},
+		CredHelpers: map[string]string{},
+	}
+}
+
+func (c *Config) SetAuth(registry, username, password string) {
+	authBytes := []byte(fmt.Sprintf("%s:%s", username, password))
+	encodedString := base64.StdEncoding.EncodeToString(authBytes)
+	c.Auths[registry] = Auth{Auth: encodedString}
+}
+
+func (c *Config) SetCredHelper(registry, helper string) {
+	c.CredHelpers[registry] = helper
+}

pkg/docker/config_test.go

@@ -0,0 +1,25 @@
+package docker
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+func TestConfig(t *testing.T) {
+	c := NewConfig()
+
+	c.SetAuth(RegistryV1, "test", "password")
+	c.SetCredHelper(RegistryECRPublic, "ecr-login")
+
+	bytes, err := json.Marshal(c)
+	if err != nil {
+		t.Error("json marshal failed")
+	}
+
+	want := `{"auths":{"https://index.docker.io/v1/":{"auth":"dGVzdDpwYXNzd29yZA=="}},"credHelpers":{"public.ecr.aws":"ecr-login"}}`
+	got := string(bytes)
+
+	if want != got {
+		t.Errorf("unexpected json output:\n  want: %s\n   got: %s", want, got)
+	}
+}

pkg/docker/constants.go

@@ -0,0 +1,7 @@
+package docker
+
+const (
+	RegistryV1        string = "https://index.docker.io/v1/"
+	RegistryV2        string = "https://index.docker.io/v2/"
+	RegistryECRPublic string = "public.ecr.aws"
+)

pkg/docker/docker_file.go

@@ -0,0 +1,35 @@
+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))
+	filePath := path + "/config.json"
+	err = ioutil.WriteFile(filePath, jsonBytes, 0644)
+	if err != nil {
+		return errors.Wrap(err, "failed to create docker config file")
+	}
+	return nil
+}

pkg/output/output.go

@@ -0,0 +1,12 @@
+package output
+
+import (
+	"github.com/joho/godotenv"
+)
+
+func WritePluginOutputFile(outputFilePath, digest string) error {
+	output := map[string]string{
+		"digest": digest,
+	}
+	return godotenv.Write(output, outputFilePath)
+}

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 +11,19 @@ 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=amd64 go build -o release/linux/amd64/kaniko-gar    ./cmd/kaniko-gar
 
 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=arm64 go build -o release/linux/arm64/kaniko-gar    ./cmd/kaniko-gar
 
 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
+GOOS=linux GOARCH=arm   go build -o release/linux/arm/kaniko-gar      ./cmd/kaniko-gar

scripts/docker.sh

@@ -15,10 +15,12 @@ set -x
 
 # build the binary
 go build -o release/linux/amd64/kaniko-gcr    ./cmd/kaniko-gcr
+go build -o release/linux/amd64/kaniko-gar    ./cmd/kaniko-gar
 go build -o release/linux/amd64/kaniko-ecr    ./cmd/kaniko-ecr
 go build -o release/linux/amd64/kaniko-docker ./cmd/kaniko-docker
 
 # build the docker image
 docker build -f docker/gcr/Dockerfile.linux.amd64    -t plugins/kaniko-gcr .
+docker build -f docker/gar/Dockerfile.linux.amd64    -t plugins/kaniko-gar .
 docker build -f docker/ecr/Dockerfile.linux.amd64    -t plugins/kaniko-ecr .
 docker build -f docker/docker/Dockerfile.linux.amd64 -t plugins/kaniko .