Setup a working pipeline

* add tests to ensure function even after switching docker client api version * switch docker client api version to remove import of Sirupsen and get rid of the casing workaround * migrate from glide to dep to go modules * rewrite ci workflow * only run publish on version tags * only run build on branches * update goreleaser config * disable automated latest tag push * remove dependency to v2tec/docker-gobuilder * remove dead code and files * add golands .idea folder to gitignore * add label to released docker images * add test reporting, add some unit tests * change test output dir * fix goreleaser versions * add debug output for circleci and goreleaser * disable cgo
6 years ago · 1b82da1ab7
parent 98f916f29a
commit 1b82da1ab7
16 changed files with 450 additions and 362 deletions
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@ -0,0 +1,116 @@
+version: 2.1
+
+executors:
+  go:
+    docker:
+      - image: circleci/golang:latest
+    working_directory: ~/repo
+
+workflows:
+  version: 2
+  ci:
+    jobs:
+      - checkout:
+          filters:
+            branches:
+              only: /.*/
+            tags:
+              only: /.*/
+      - linting:
+          requires:
+            - checkout
+          filters:
+            branches:
+              only: /.*/
+            tags:
+              only: /.*/
+      - testing:
+          requires:
+            - checkout
+          filters:
+            branches:
+              only: /.*/
+            tags:
+              only: /.*/
+      - build:
+          requires:
+            - testing
+            - linting
+          filters:
+            tags:
+              ignore: /^v[0-9]+(\.[0-9]+)*$/
+            branches:
+              only: /.*/
+      - publishing:
+          requires:
+            - testing
+            - linting
+          filters:
+            branches:
+              ignore: /.*/
+            tags:
+              only: /^v[0-9]+(\.[0-9]+)*$/
+jobs:
+  checkout:
+    executor: go
+    steps:
+      - checkout
+      - persist_to_workspace:
+          paths:
+            - .
+          root: ~/repo
+  linting:
+    executor: go
+    steps:
+      - attach_workspace:
+          at: .
+      - run: go build .
+      - run: go get -u golang.org/x/lint/golint
+      - run: golint -set_exit_status ./... 
+  testing:
+    executor: go
+    steps:
+      - attach_workspace:
+          at: .
+      - run: mkdir -p /tmp/test-results
+      - run: go build ./...
+      - run: go get gotest.tools/gotestsum
+      - run: gotestsum --junitfile /tmp/test-results/unit-tests.xml
+      - store_test_results:
+          path: /tmp/test-results
+  build:
+    executor: go
+    steps:
+      - attach_workspace:
+          at: .
+      - setup_remote_docker
+      - run:
+          name: Install Goreleaser
+          command: |
+            cd .. && \
+            wget https://github.com/goreleaser/goreleaser/releases/download/v0.104.1/goreleaser_Linux_x86_64.tar.gz && \
+            tar -xvf goreleaser_Linux_x86_64.tar.gz && \
+            ./goreleaser -v
+      - run: 
+          name: Execute goreleaser
+          command: ../goreleaser --snapshot --skip-publish --debug
+  publishing:
+    executor: go
+    steps:
+      - attach_workspace:
+          at: .
+      - setup_remote_docker
+      - run:
+          name: Install Goreleaser
+          command: |
+            cd .. && \
+            wget https://github.com/goreleaser/goreleaser/releases/download/v0.104.1/goreleaser_Linux_x86_64.tar.gz && \
+            tar -xvf goreleaser_Linux_x86_64.tar.gz && \
+            ./goreleaser -v
+      - run:
+          name: Login to docker hub
+          command: |
+            echo "$DOCKER_PASS" | docker login -u $DOCKER_USER --password-stdin 
+      - run: 
+          name: Execute goreleaser
+          command: CGO_ENABLED=${CGO_ENABLED:-0} ../goreleaser --debug
--- a/.gitignore
+++ b/.gitignore
@ -1,4 +1,5 @@
 watchtower
 vendor
 .glide
-dist
+dist
+.idea
--- a/actions/update.go
+++ b/actions/update.go
@ -4,12 +4,12 @@ import (
 	"math/rand"
 	"time"

-	log "github.com/sirupsen/logrus"
 	"github.com/containrrr/watchtower/container"
+	log "github.com/sirupsen/logrus"
 )

 var (
-	letters  = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
+	letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
 )

 // Update looks at the running Docker containers to see if any of the images
@ -45,6 +45,7 @@ func Update(client container.Client, filter container.Filter, cleanup bool, noRe
 		container := containers[i]

 		if container.IsWatchtower() {
+			log.Debugf("This is the watchtower container %s", containers[i].Name())
 			continue
 		}

--- a/circle.yml
+++ b/circle.yml
@ -1,28 +0,0 @@
-version: 2
-jobs:
-  build:
-    docker:
-      - image: v2tec/gobuilder:0.5.0_go1.7.4-glide0.12.3-goreleaser0.59.0-docker17.05.0
-    working_directory: /src
-    steps:
-      - checkout
-      - setup_remote_docker:
-          version: 17.05.0-ce
-      - run: git fetch --tags
-      - run: |
-          docker login -u $DOCKER_USER -p $DOCKER_PASS
-          IS_RELEASE=$(if [ "$CIRCLE_TAG" != "" ] ; then echo release; else echo ci; fi;)
-          /build.sh $IS_RELEASE || exit 1
-          chmod 755 /src/dockerfile/push_containers.sh
-          if [ "$CIRCLE_TAG" != "" ] ; then /src/dockerfile/push_containers.sh $CIRCLE_TAG; fi;
-
-      - store_artifacts:
-          path: /src/dist/
-workflows:
-  version: 2
-  build-deploy:
-    jobs:
-      - build:
-          filters:
-            tags:
-              only: /.*/
--- a/container/client.go
+++ b/container/client.go
@ -187,6 +187,8 @@ func (client dockerClient) IsContainerStale(c Container) (bool, error) {

 		var opts types.ImagePullOptions // ImagePullOptions can take a RegistryAuth arg to authenticate against a private registry
 		auth, err := EncodedAuth(imageName)
+		log.Infof("Got auth value: %s", auth)
+		log.Infof("Got image name: %s", imageName)
 		if err != nil {
 			log.Debugf("Error loading authentication credentials %s", err)
 			return false, err
--- a/container/container.go
+++ b/container/container.go
@ -4,7 +4,7 @@ import (
 	"fmt"
 	"strconv"
 	"strings"
-
+	log "github.com/sirupsen/logrus"
 	"github.com/docker/docker/api/types"
 	dockercontainer "github.com/docker/docker/api/types/container"
 )
@ -102,8 +102,9 @@ func (c Container) Links() []string {
 // identified by the presence of the "com.centurylinklabs.watchtower" label in
 // the container metadata.
 func (c Container) IsWatchtower() bool {
-	val, ok := c.containerInfo.Config.Labels[watchtowerLabel]
-	return ok && val == "true"
+	log.Debugf("Checking if %s is a watchtower instance.", c.Name())
+	wasWatchtower := ContainsWatchtowerLabel(c.containerInfo.Config.Labels)
+	return wasWatchtower
 }

 // StopSignal returns the custom stop signal (if any) that is encoded in the
@ -182,3 +183,10 @@ func (c Container) hostConfig() *dockercontainer.HostConfig {

 	return hostConfig
 }
+
+// ContainsWatchtowerLabel takes a map of labels and values and tells
+// the consumer whether it contains a valid watchtower instance label
+func ContainsWatchtowerLabel(labels map[string]string) bool {
+	val, ok := labels[watchtowerLabel]
+	return ok && val == "true"
+}
--- a/container/container_test.go
+++ b/container/container_test.go
@ -0,0 +1,25 @@
+package container
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestContainsWatchtowerLabel_ShouldReturnTrueIfTheWatchtowerLabelExistsOnTheContainer(t *testing.T) {
+	labelMap := map[string]string {
+		"com.centurylinklabs.watchtower": "true",
+	}
+	assert.True(t, ContainsWatchtowerLabel(labelMap))
+}
+
+func TestContainsWatchtowerLabel_ShouldReturnFalseIfTheWatchtowerLabelDoesntExistOnTheContainer(t *testing.T) {
+	labelMap := map[string]string {
+		"com.containrrr.watchtower": "lost",
+	}
+	assert.False(t, ContainsWatchtowerLabel(labelMap))
+}
+
+func TestContainsWatchtowerLabel_ShouldReturnFalseIfLabelsIsEmpty(t *testing.T) {
+	labelMap := map[string]string {}
+	assert.False(t, ContainsWatchtowerLabel(labelMap))
+}
--- a/container/trust.go
+++ b/container/trust.go
@ -5,12 +5,12 @@ import (
 	"os"
 	"strings"

+	"github.com/docker/cli/cli/command"
+	cliconfig "github.com/docker/cli/cli/config"
+	"github.com/docker/cli/cli/config/configfile"
+	"github.com/docker/cli/cli/config/credentials"
+	"github.com/docker/distribution/reference"
 	"github.com/docker/docker/api/types"
-	"github.com/docker/docker/api/types/reference"
-	"github.com/docker/docker/cli/command"
-	"github.com/docker/docker/cliconfig"
-	"github.com/docker/docker/cliconfig/configfile"
-	"github.com/docker/docker/cliconfig/credentials"
 	log "github.com/sirupsen/logrus"
 )

@ -67,12 +67,15 @@ func EncodedConfigAuth(ref string) (string, error) {
 	return EncodeAuth(auth)
 }

+// ParseServerAddress extracts the server part from a container image ref
 func ParseServerAddress(ref string) (string, error) {
-	repository, _, err := reference.Parse(ref)
+
+	parsedRef, err := reference.Parse(ref)
 	if err != nil {
 		return ref, err
 	}
-	parts := strings.Split(repository, "/")
+
+	parts := strings.Split(parsedRef.String(), "/")
 	return parts[0], nil
 }

--- a/container/trust_test.go
+++ b/container/trust_test.go
@ -0,0 +1,60 @@
+package container
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestEncodedEnvAuth_ShouldReturnAnErrorIfRepoEnvsAreUnset(t *testing.T) {
+	os.Unsetenv("REPO_USER")
+	os.Unsetenv("REPO_PASS")
+	_, err := EncodedEnvAuth("")
+	assert.Error(t, err)
+}
+func TestEncodedEnvAuth_ShouldReturnAuthHashIfRepoEnvsAreSet(t *testing.T) {
+	expectedHash := "eyJ1c2VybmFtZSI6ImNvbnRhaW5ycnItdXNlciIsInBhc3N3b3JkIjoiY29udGFpbnJyci1wYXNzIn0="
+
+	os.Setenv("REPO_USER", "containrrr-user")
+	os.Setenv("REPO_PASS", "containrrr-pass")
+	config, _ := EncodedEnvAuth("")
+
+	assert.Equal(t, config, expectedHash)
+}
+
+func TestEncodedConfigAuth_ShouldReturnAnErrorIfFileIsNotPresent(t *testing.T) {
+	os.Setenv("DOCKER_CONFIG", "/dev/null/should-fail")
+	_, err := EncodedConfigAuth("")
+	assert.Error(t, err)
+}
+
+/*
+ * TODO:
+ * This part only confirms that it still works in the same way as it did
+ * with the old version of the docker api client sdk. I'd say that
+ * ParseServerAddress likely needs to be elaborated a bit to default to
+ * dockerhub in case no server address was provided.
+ *
+ * ++ @simskij, 2019-04-04
+ */
+
+func TestParseServerAddress_ShouldReturnErrorIfPassedEmptyString(t *testing.T) {
+	_, err := ParseServerAddress("")
+	assert.Error(t, err)
+}
+
+func TestParseServerAddress_ShouldReturnTheRepoNameIfPassedAFullyQualifiedImageName(t *testing.T) {
+	val, _ := ParseServerAddress("github.com/containrrrr/config")
+	assert.Equal(t, val, "github.com")
+}
+
+func TestParseServerAddress_ShouldReturnTheOrganizationPartIfPassedAnImageNameMissingServerName(t *testing.T) {
+	val, _ := ParseServerAddress("containrrr/config")
+	assert.Equal(t, val, "containrrr")
+}
+
+func TestParseServerAddress_ShouldReturnTheServerNameIfPassedAFullyQualifiedImageName(t *testing.T) {
+	val, _ := ParseServerAddress("github.com/containrrrr/config")
+	assert.Equal(t, val, "github.com")
+}
--- a/dockerfile/push_containers.sh
+++ b/dockerfile/push_containers.sh
@ -1,53 +0,0 @@
-#!/bin/bash
-
-PROGNAME=$(basename $0)
-VERSION_BUILD=$1
-
-function error_exit
-{
-    echo "${PROGNAME}: ${1:-"Unknown Error"}" 1>&2
-    exit 1
-}
-
-if [ "$1" = "" ]; then
-  error_exit "Please provide version as first argument."
-fi
-
-SEMVER=${VERSION_BUILD#*v}
-VERSION=`echo $SEMVER | awk '{split($0,a,"."); print a[1]}'`
-BUILD=`echo $SEMVER | awk '{split($0,a,"."); print a[2]}'`
-PATCH=`echo $SEMVER | awk '{split($0,a,"."); print a[3]}'`
-
-if [ "${VERSION}" = "" ]; then
-  echo "Please provide a semantic version."
-  exit 1
-fi
-
-if [ "${BUILD}" = "" ]; then
-  BUILD='0'
-fi
-
-if [ "${PATCH}" = "" ]; then
-  PATCH='0'
-fi
-
-push_docker() {
-  echo "  -> push $1 $2"
-  docker tag $1 $2 || exit 1
-  docker push $2 || exit 1
-}
-
-push_all() {
-    IMAGE_NAME_VERSION=${1}${VERSION}.${BUILD}.${PATCH}
-    echo "Pulling $IMAGE_NAME_VERSION..."
-    docker pull ${IMAGE_NAME_VERSION} || exit 1
-    echo "Pushing $IMAGE_NAME_VERSION..."
-    push_docker ${IMAGE_NAME_VERSION} ${1}${VERSION}.${BUILD}
-    push_docker ${IMAGE_NAME_VERSION} ${1}${VERSION}
-    push_docker ${IMAGE_NAME_VERSION} ${1}latest
-}
-
-IMAGE_NAME=containrrr/watchtower
-push_all ${IMAGE_NAME}:
-push_all ${IMAGE_NAME}:armhf-
-push_all ${IMAGE_NAME}:arm64v8-
--- a/glide.lock
+++ b/glide.lock
@ -1,193 +0,0 @@
-hash: 23bcd62f9352c61d3aebc85a59f7ebbfaf80bc0201f45037cdea65820673ddeb
-updated: 2018-03-01T13:21:55.8472118+01:00
-imports:
- name: github.com/Azure/go-ansiterm
-  version: 388960b655244e76e24c75f48631564eaefade62
-  subpackages:
-  - winterm
- name: github.com/davecgh/go-spew
-  version: 6d212800a42e8ab5c146b8ace3490ee17e5225f9
-  subpackages:
-  - spew
- name: github.com/docker/distribution
-  version: 28602af35aceda2f8d571bad7ca37a54cf0250bc
-  subpackages:
-  - context
-  - digest
-  - reference
-  - registry/api/errcode
-  - registry/api/v2
-  - registry/client
-  - registry/client/auth
-  - registry/client/auth/challenge
-  - registry/client/transport
-  - registry/storage/cache
-  - registry/storage/cache/memory
-  - uuid
- name: github.com/docker/docker
-  version: 092cba3727bb9b4a2f0e922cd6c0f93ea270e363
-  subpackages:
-  - api
-  - api/server/httputils
-  - api/types
-  - api/types/blkiodev
-  - api/types/container
-  - api/types/events
-  - api/types/filters
-  - api/types/mount
-  - api/types/network
-  - api/types/reference
-  - api/types/registry
-  - api/types/strslice
-  - api/types/swarm
-  - api/types/time
-  - api/types/versions
-  - api/types/volume
-  - cli/command
-  - cli/flags
-  - cliconfig
-  - cliconfig/configfile
-  - cliconfig/credentials
-  - client
-  - daemon/graphdriver
-  - dockerversion
-  - image
-  - image/v1
-  - layer
-  - oci
-  - opts
-  - pkg/archive
-  - pkg/chrootarchive
-  - pkg/fileutils
-  - pkg/homedir
-  - pkg/httputils
-  - pkg/idtools
-  - pkg/ioutils
-  - pkg/jsonlog
-  - pkg/jsonmessage
-  - pkg/longpath
-  - pkg/mount
-  - pkg/parsers/kernel
-  - pkg/plugingetter
-  - pkg/plugins
-  - pkg/plugins/transport
-  - pkg/pools
-  - pkg/promise
-  - pkg/random
-  - pkg/reexec
-  - pkg/stringid
-  - pkg/system
-  - pkg/tarsum
-  - pkg/term
-  - pkg/term/windows
-  - pkg/tlsconfig
-  - pkg/useragent
-  - plugin/v2
-  - reference
-  - registry
- name: github.com/docker/docker-credential-helpers
-  version: f72c04f1d8e71959a6d103f808c50ccbad79b9fd
-  subpackages:
-  - client
-  - credentials
- name: github.com/docker/go-connections
-  version: ecb4cb2dd420ada7df7f2593d6c25441f65f69f2
-  subpackages:
-  - nat
-  - sockets
-  - tlsconfig
- name: github.com/docker/go-units
-  version: 8a7beacffa3009a9ac66bad506b18ffdd110cf97
- name: github.com/docker/libtrust
-  version: 9cbd2a1374f46905c68a4eb3694a130610adc62a
- name: github.com/golang/protobuf
-  version: 1f49d83d9aa00e6ce4fc8258c71cc7786aec968a
-  subpackages:
-  - proto
- name: github.com/gorilla/context
-  version: 1ea25387ff6f684839d82767c1733ff4d4d15d0a
- name: github.com/gorilla/mux
-  version: 0eeaf8392f5b04950925b8a69fe70f110fa7cbfc
- name: github.com/inconshreveable/mousetrap
-  version: 76626ae9c91c4f2a10f34cad8ce83ea42c93bb75
- name: github.com/johntdyer/slack-go
-  version: 95fac1160b220c5abcf8b0ef88e9c3cb213c09f4
- name: github.com/johntdyer/slackrus
-  version: 3992f319fd0ac349483279ef74742cd787841cba
- name: github.com/mattn/go-shellwords
-  version: f4e566c536cf69158e808ec28ef4182a37fdc981
- name: github.com/Microsoft/go-winio
-  version: fff283ad5116362ca252298cfc9b95828956d85d
- name: github.com/opencontainers/runc
-  version: 9df8b306d01f59d3a8029be411de015b7304dd8f
-  repo: https://github.com/docker/runc.git
-  subpackages:
-  - libcontainer/configs
-  - libcontainer/devices
-  - libcontainer/system
-  - libcontainer/user
- name: github.com/opencontainers/runtime-spec
-  version: 1c7c27d043c2a5e513a44084d2b10d77d1402b8c
-  subpackages:
-  - specs-go
- name: github.com/pkg/errors
-  version: 839d9e913e063e28dfd0e6c7b7512793e0a48be9
- name: github.com/pmezard/go-difflib
-  version: d8ed2627bdf02c080bf22230dbb337003b7aba2d
-  subpackages:
-  - difflib
- name: github.com/robfig/cron
-  version: 9585fd555638e77bba25f25db5c44b41f264aeb7
- name: github.com/Sirupsen/logrus
-  version: ba1b36c82c5e05c4f912a88eab0dcd91a171688f
-  repo: https://github.com/sirupsen/logrus.git
- name: github.com/sirupsen/logrus
-  version: ba1b36c82c5e05c4f912a88eab0dcd91a171688f
- name: github.com/spf13/cobra
-  version: a3c09249f1a24a9d951f2738fb9b9256b8b42fa5
-  repo: https://github.com/dnephin/cobra.git
- name: github.com/spf13/pflag
-  version: dabebe21bf790f782ea4c7bbd2efc430de182afd
- name: github.com/stretchr/objx
-  version: cbeaeb16a013161a98496fad62933b1d21786672
- name: github.com/stretchr/testify
-  version: 69483b4bd14f5845b5a1e55bca19e954e827f1d0
-  subpackages:
-  - assert
-  - mock
- name: github.com/urfave/cli
-  version: 0bdeddeeb0f650497d603c4ad7b20cfe685682f6
- name: github.com/vbatts/tar-split
-  version: d3f1b54304d656376e58f9406a9cb4775799a357
-  subpackages:
-  - archive/tar
-  - tar/asm
-  - tar/storage
- name: golang.org/x/net
-  version: 2beffdc2e92c8a3027590f898fe88f69af48a3f8
-  repo: https://github.com/tonistiigi/net.git
-  subpackages:
-  - context
-  - context/ctxhttp
-  - http2
-  - http2/hpack
-  - internal/timeseries
-  - proxy
-  - trace
- name: golang.org/x/sys
-  version: 8f0908ab3b2457e2e15403d3697c9ef5cb4b57a9
-  subpackages:
-  - unix
-  - windows
- name: google.golang.org/grpc
-  version: b1a2821ca5a4fd6b6e48ddfbb7d6d7584d839d21
-  subpackages:
-  - codes
-  - credentials
-  - grpclog
-  - internal
-  - metadata
-  - naming
-  - peer
-  - transport
-testImports: []
--- a/glide.yaml
+++ b/glide.yaml
@ -1,33 +0,0 @@
-package: github.com/containrrr/watchtower
-import:
- package: github.com/sirupsen/logrus
-  version: ~0.11.x
- package: github.com/Sirupsen/logrus
-  repo: https://github.com/sirupsen/logrus.git
-  version: ~0.11.x
- package: github.com/docker/docker
-  version: ~1.13.x
-  subpackages:
-  - api/types
-  - api/types/container
-  - api/types/network
-  - api/types/reference
-  - cli/command
-  - cliconfig
-  - cliconfig/configfile
-  - cliconfig/credentials
-  - client
- package: github.com/stretchr/testify
-  version: ~1.1.4
-  subpackages:
-  - mock
- package: github.com/urfave/cli
-  version: ~1.19.1
- package: golang.org/x/net
-  repo: https://github.com/tonistiigi/net.git
-  subpackages:
-  - context
- package: github.com/robfig/cron
-  version: 9585fd555638e77bba25f25db5c44b41f264aeb7
- package: github.com/johntdyer/slackrus
-  version: 3992f31
--- a/go.mod
+++ b/go.mod
@ -0,0 +1,53 @@
+module github.com/containrrr/watchtower
+
+go 1.12
+
+require (
+	github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78
+	github.com/Microsoft/go-winio v0.4.12
+	github.com/agl/ed25519 v0.0.0-20170116200512-5312a6153412
+	github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973
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+)
--- a/go.sum
+++ b/go.sum
@ -0,0 +1,148 @@
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+golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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+golang.org/x/net v0.0.0-20190403144856-b630fd6fe46b/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
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+google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
+google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
+google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
+google.golang.org/genproto v0.0.0-20190401181712-f467c93bbac2 h1:8FyEBtGg6Px24p+H2AkuVWqhj4+R9fo+fZD17mg+lzk=
+google.golang.org/genproto v0.0.0-20190401181712-f467c93bbac2/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
+google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
+google.golang.org/grpc v1.19.1 h1:TrBcJ1yqAl1G++wO39nD/qtgpsW9/1+QGrluyMGEYgM=
+google.golang.org/grpc v1.19.1/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
+gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
--- a/goreleaser.yml
+++ b/goreleaser.yml
@ -1,39 +1,16 @@
-# Build customization
 build:
-  # Path to main.go file.
-  # Default is `main.go`
  main: ./main.go
-
-  # GOOS list to build in.
-  # For more info refer to https://golang.org/doc/install/source#environment
-  # Defaults are darwin and linux
+  binary: watchtower
  goos:
    - linux
    - windows
-
-  # GOARCH to build in.
-  # For more info refer to https://golang.org/doc/install/source#environment
-  # Defaults are 386 and amd64
  goarch:
    - amd64
    - arm
    - arm64
-
-# Archive customization
 archive:
-  # You can change the name of the archive.
-  # This is parsed with Golang template engine and the following variables.
  name_template: "{{.ProjectName}}_{{.Os}}_{{.Arch}}"
-
-  # Archive format. Valid options are `tar.gz` and `zip`.
-  # Default is `zip`
  format: tar.gz
-
-  # Replacements for GOOS and GOARCH on the archive name.
-  # The keys should be valid GOOS or GOARCH values followed by your custom
-  # replacements.
-  # By default, `replacements` replace GOOS and GOARCH values with valid outputs
-  # of `uname -s` and `uname -m` respectively.
  replacements:
    arm: armhf
    arm64: arm64v8
@ -41,42 +18,42 @@ archive:
    386: 386
    darwin: macOS
    linux: linux
-
  format_overrides:
    - goos: windows
      format: zip
-
-  # Additional files you want to add to the archive.
-  # Defaults are any files matching `LICENCE*`, `LICENSE*`,
-  # `README*` and `CHANGELOG*` (case-insensitive)
  files:
    - LICENSE.md
-
 dockers:
  -
    goos: linux
    goarch: amd64
    goarm: ''
-    binary: watchtower
-    image: containrrr/watchtower
    dockerfile: dockerfile/amd64/Dockerfile
-    tag_templates:
-      - '{{ .Version }}'
+    build_flag_templates:
+      - "--label=com.centurylinklabs.watchtower=true"
+    image_templates:
+      - containrrr/watchtower:{{ .Version }}
+    binaries:
+      - watchtower
  -
    goos: linux
    goarch: arm
    goarm: 6
-    binary: watchtower
-    image: containrrr/watchtower
    dockerfile: dockerfile/armhf/Dockerfile
-    tag_templates:
-      - 'armhf-{{ .Version }}'
+    build_flag_templates:
+      - "--label=com.centurylinklabs.watchtower=true"
+    image_templates:
+      - containrrr/watchtower:armhf-{{ .Version }}
+    binaries:
+      - watchtower
  -
    goos: linux
    goarch: arm64
    goarm: ''
-    binary: watchtower
-    image: containrrr/watchtower
    dockerfile: dockerfile/arm64v8/Dockerfile
-    tag_templates:
-      - 'arm64v8-{{ .Version }}'
+    build_flag_templates:
+      - "--label=com.centurylinklabs.watchtower=true"
+    image_templates:
+      - containrrr/watchtower:arm64v8-{{ .Version }}
+    binaries:
+      - watchtower
--- a/notifications/smtp.go
+++ b/notifications/smtp.go
@ -1,3 +1,4 @@
+// Package notifications ...
 // Copyright 2010 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license.