switch urfave to cobra

app/app.go

@@ -1,168 +0,0 @@
-package app
-
-import (
-	"time"
-
-	"github.com/urfave/cli"
-)
-
-// SetupCliFlags registers flags on the supplied urfave app
-func SetupCliFlags(app *cli.App) {
-	app.Flags = []cli.Flag{
-		cli.StringFlag{
-			Name:   "host, H",
-			Usage:  "daemon socket to connect to",
-			Value:  "unix:///var/run/docker.sock",
-			EnvVar: "DOCKER_HOST",
-		},
-		cli.IntFlag{
-			Name:   "interval, i",
-			Usage:  "poll interval (in seconds)",
-			Value:  300,
-			EnvVar: "WATCHTOWER_POLL_INTERVAL",
-		},
-		cli.StringFlag{
-			Name:   "schedule, s",
-			Usage:  "the cron expression which defines when to update",
-			EnvVar: "WATCHTOWER_SCHEDULE",
-		},
-		cli.BoolFlag{
-			Name:   "no-pull",
-			Usage:  "do not pull new images",
-			EnvVar: "WATCHTOWER_NO_PULL",
-		},
-		cli.BoolFlag{
-			Name:   "no-restart",
-			Usage:  "do not restart containers",
-			EnvVar: "WATCHTOWER_NO_RESTART",
-		},
-		cli.BoolFlag{
-			Name:   "cleanup",
-			Usage:  "remove old images after updating",
-			EnvVar: "WATCHTOWER_CLEANUP",
-		},
-		cli.BoolFlag{
-			Name:   "tlsverify",
-			Usage:  "use TLS and verify the remote",
-			EnvVar: "DOCKER_TLS_VERIFY",
-		},
-		cli.DurationFlag{
-			Name:   "stop-timeout",
-			Usage:  "timeout before container is forcefully stopped",
-			Value:  time.Second * 10,
-			EnvVar: "WATCHTOWER_TIMEOUT",
-		},
-		cli.BoolFlag{
-			Name:   "label-enable",
-			Usage:  "watch containers where the com.centurylinklabs.watchtower.enable label is true",
-			EnvVar: "WATCHTOWER_LABEL_ENABLE",
-		},
-		cli.BoolFlag{
-			Name:  "debug",
-			Usage: "enable debug mode with verbose logging",
-		},
-		cli.StringSliceFlag{
-			Name:   "notifications",
-			Value:  &cli.StringSlice{},
-			Usage:  "notification types to send (valid: email, slack, msteams)",
-			EnvVar: "WATCHTOWER_NOTIFICATIONS",
-		},
-		cli.StringFlag{
-			Name:   "notifications-level",
-			Usage:  "The log level used for sending notifications. Possible values: \"panic\", \"fatal\", \"error\", \"warn\", \"info\" or \"debug\"",
-			EnvVar: "WATCHTOWER_NOTIFICATIONS_LEVEL",
-			Value:  "info",
-		},
-		cli.StringFlag{
-			Name:   "notification-email-from",
-			Usage:  "Address to send notification e-mails from",
-			EnvVar: "WATCHTOWER_NOTIFICATION_EMAIL_FROM",
-		},
-		cli.StringFlag{
-			Name:   "notification-email-to",
-			Usage:  "Address to send notification e-mails to",
-			EnvVar: "WATCHTOWER_NOTIFICATION_EMAIL_TO",
-		},
-		cli.StringFlag{
-			Name:   "notification-email-server",
-			Usage:  "SMTP server to send notification e-mails through",
-			EnvVar: "WATCHTOWER_NOTIFICATION_EMAIL_SERVER",
-		},
-		cli.IntFlag{
-			Name:   "notification-email-server-port",
-			Usage:  "SMTP server port to send notification e-mails through",
-			Value:  25,
-			EnvVar: "WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT",
-		},
-		cli.BoolFlag{
-			Name: "notification-email-server-tls-skip-verify",
-			Usage: "Controls whether watchtower verifies the SMTP server's certificate chain and host name. " +
-				"If set, TLS accepts any certificate " +
-				"presented by the server and any host name in that certificate. " +
-				"In this mode, TLS is susceptible to man-in-the-middle attacks. " +
-				"This should be used only for testing.",
-			EnvVar: "WATCHTOWER_NOTIFICATION_EMAIL_SERVER_TLS_SKIP_VERIFY",
-		},
-		cli.StringFlag{
-			Name:   "notification-email-server-user",
-			Usage:  "SMTP server user for sending notifications",
-			EnvVar: "WATCHTOWER_NOTIFICATION_EMAIL_SERVER_USER",
-		},
-		cli.StringFlag{
-			Name:   "notification-email-server-password",
-			Usage:  "SMTP server password for sending notifications",
-			EnvVar: "WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD",
-		},
-		cli.StringFlag{
-			Name:   "notification-slack-hook-url",
-			Usage:  "The Slack Hook URL to send notifications to",
-			EnvVar: "WATCHTOWER_NOTIFICATION_SLACK_HOOK_URL",
-		},
-		cli.StringFlag{
-			Name:   "notification-slack-identifier",
-			Usage:  "A string which will be used to identify the messages coming from this watchtower instance. Default if omitted is \"watchtower\"",
-			EnvVar: "WATCHTOWER_NOTIFICATION_SLACK_IDENTIFIER",
-			Value:  "watchtower",
-		},
-		cli.StringFlag{
-			Name:   "notification-slack-channel",
-			Usage:  "A string which overrides the webhook's default channel. Example: #my-custom-channel",
-			EnvVar: "WATCHTOWER_NOTIFICATION_SLACK_CHANNEL",
-		},
-		cli.StringFlag{
-			Name:   "notification-slack-icon-emoji",
-			Usage:  "An emoji code string to use in place of the default icon",
-			EnvVar: "WATCHTOWER_NOTIFICATION_SLACK_ICON_EMOJI",
-		},
-		cli.StringFlag{
-			Name:   "notification-slack-icon-url",
-			Usage:  "An icon image URL string to use in place of the default icon",
-			EnvVar: "WATCHTOWER_NOTIFICATION_SLACK_ICON_URL",
-		},
-		cli.StringFlag{
-			Name:   "notification-msteams-hook",
-			Usage:  "The MSTeams WebHook URL to send notifications to",
-			EnvVar: "WATCHTOWER_NOTIFICATION_MSTEAMS_HOOK_URL",
-		},
-		cli.BoolFlag{
-			Name:   "notification-msteams-data",
-			Usage:  "The MSTeams notifier will try to extract log entry fields as MSTeams message facts",
-			EnvVar: "WATCHTOWER_NOTIFICATION_MSTEAMS_USE_LOG_DATA",
-		},
-		cli.BoolFlag{
-			Name:   "monitor-only",
-			Usage:  "Will only monitor for new images, not update the containers",
-			EnvVar: "WATCHTOWER_MONITOR_ONLY",
-		},
-		cli.BoolFlag{
-			Name:   "run-once",
-			Usage:  "Run once now and exit",
-			EnvVar: "WATCHTOWER_RUN_ONCE",
-		},
-		cli.BoolFlag{
-			Name:   "include-stopped",
-			Usage:  "Will also include created and exited containers",
-			EnvVar: "WATCHTOWER_INCLUDE_STOPPED",
-		},
-	}
-}

cmd/root.go

@@ -0,0 +1,178 @@
+package cmd
+
+import (
+	"fmt"
+	"github.com/containrrr/watchtower/actions"
+	"github.com/containrrr/watchtower/container"
+	"github.com/containrrr/watchtower/internal/flags"
+	"github.com/containrrr/watchtower/notifications"
+	"github.com/robfig/cron"
+	log "github.com/sirupsen/logrus"
+	"os"
+	"os/signal"
+	"strconv"
+	"syscall"
+	"time"
+
+	"github.com/spf13/cobra"
+)
+
+const DockerAPIMinVersion string = "1.24"
+
+var (
+	client       container.Client
+	scheduleSpec string
+	cleanup      bool
+	noRestart    bool
+	monitorOnly  bool
+	enableLabel  bool
+	notifier     *notifications.Notifier
+	timeout      time.Duration
+)
+
+var rootCmd = &cobra.Command{
+	Use:    "watchtower",
+	Short:  "Automatically updates running Docker containers",
+	Long:   `
+Watchtower automatically updates running Docker containers whenever a new image is released.
+More information available at https://github.com/containrrr/watchtower/.
+`,
+	Run:    Run,
+	PreRun: PreRun,
+}
+
+func init() {
+	flags.SetDefaults()
+	flags.RegisterDockerFlags(rootCmd)
+	flags.RegisterSystemFlags(rootCmd)
+	flags.RegisterNotificationFlags(rootCmd)
+}
+
+func Execute() {
+	if err := rootCmd.Execute(); err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}
+
+func PreRun(cmd *cobra.Command, args []string) {
+	f := cmd.PersistentFlags()
+
+	if enabled, _ := f.GetBool("debug"); enabled == true {
+		log.SetLevel(log.DebugLevel)
+	}
+
+	pollingSet := f.Changed("interval")
+	cronSet := f.Changed("schedule")
+	schedule, _ := f.GetString("schedule")
+	cronLen := len(schedule)
+
+	if pollingSet && cronSet && cronLen > 0 {
+		log.Fatal("Only schedule or interval can be defined, not both.")
+	} else if cronSet && cronLen > 0 {
+		scheduleSpec, _ = f.GetString("schedule")
+	} else {
+		interval, _ := f.GetInt("interval")
+		scheduleSpec = "@every " + strconv.Itoa(interval) + "s"
+	}
+
+	cleanup, noRestart, monitorOnly, timeout = flags.ReadFlags(cmd)
+
+	if timeout < 0 {
+		log.Fatal("Please specify a positive value for timeout value.")
+	}
+	enableLabel, _ = f.GetBool("label-enable")
+
+	// configure environment vars for client
+	err := flags.EnvConfig(cmd, DockerAPIMinVersion)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	noPull, _ := f.GetBool("no-pull")
+	includeStopped, _ := f.GetBool("include-stopped")
+	client = container.NewClient(
+		!noPull,
+		includeStopped,
+	)
+
+	notifier = notifications.NewNotifier(cmd)
+}
+
+func Run(c *cobra.Command, names []string) {
+	filter := container.BuildFilter(names, enableLabel)
+	runOnce, _ := c.PersistentFlags().GetBool("run-once")
+
+	if runOnce {
+		log.Info("Running a one time update.")
+		runUpdatesWithNotifications(filter)
+		os.Exit(1)
+		return
+	}
+
+	if err := actions.CheckForMultipleWatchtowerInstances(client, cleanup); err != nil {
+		log.Fatal(err)
+	}
+
+	runUpgradesOnSchedule(filter)
+	os.Exit(1)
+}
+
+func runUpgradesOnSchedule(filter container.Filter) error {
+	tryLockSem := make(chan bool, 1)
+	tryLockSem <- true
+
+	cron := cron.New()
+	err := cron.AddFunc(
+		scheduleSpec,
+		func() {
+			select {
+			case v := <-tryLockSem:
+				defer func() { tryLockSem <- v }()
+				runUpdatesWithNotifications(filter)
+			default:
+				log.Debug("Skipped another update already running.")
+			}
+
+			nextRuns := cron.Entries()
+			if len(nextRuns) > 0 {
+				log.Debug("Scheduled next run: " + nextRuns[0].Next.String())
+			}
+		})
+
+	if err != nil {
+		return err
+	}
+
+	log.Debug("Starting Watchtower and scheduling first run: " + cron.Entries()[0].Schedule.Next(time.Now()).String())
+	cron.Start()
+
+	// Graceful shut-down on SIGINT/SIGTERM
+	interrupt := make(chan os.Signal, 1)
+	signal.Notify(interrupt, os.Interrupt)
+	signal.Notify(interrupt, syscall.SIGTERM)
+
+	<-interrupt
+	cron.Stop()
+	log.Info("Waiting for running update to be finished...")
+	<-tryLockSem
+	return nil
+}
+
+func runUpdatesWithNotifications(filter container.Filter) {
+	notifier.StartNotification()
+	updateParams := actions.UpdateParams{
+		Filter:      filter,
+		Cleanup:     cleanup,
+		NoRestart:   noRestart,
+		Timeout:     timeout,
+		MonitorOnly: monitorOnly,
+	}
+	err := actions.Update(client, updateParams)
+	if err != nil {
+		log.Println(err)
+	}
+	notifier.SendNotification()
+}
+
+

go.mod

@@ -6,7 +6,7 @@ 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
+	github.com/beorn7/perks v1.0.0
 	github.com/brysgo/gomock_ginkgo v0.0.0-20180512161304-be2c1b0e4111
 	github.com/containerd/containerd v1.2.6 // indirect
 	github.com/containerd/continuity v0.0.0-20181203112020-004b46473808
@@ -23,7 +23,6 @@ require (
 	github.com/gogo/protobuf v1.2.1
 	github.com/golang/mock v1.1.1
 	github.com/golang/protobuf v1.3.1
-	github.com/google/go-cmp v0.2.0 // indirect
 	github.com/gorilla/mux v1.7.0
 	github.com/hashicorp/go-memdb v1.0.0 // indirect
 	github.com/hashicorp/go-version v1.1.0
@@ -44,24 +43,24 @@ require (
 	github.com/opencontainers/selinux v1.2.1 // indirect
 	github.com/pkg/errors v0.8.1
 	github.com/pmezard/go-difflib v1.0.0
-	github.com/prometheus/client_golang v0.9.2
+	github.com/prometheus/client_golang v0.9.3
 	github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90
-	github.com/prometheus/common v0.2.0
-	github.com/prometheus/procfs v0.0.0-20190403104016-ea9eea638872
+	github.com/prometheus/common v0.4.0
+	github.com/prometheus/procfs v0.0.0-20190507164030-5867b95ac084
 	github.com/robfig/cron v0.0.0-20180505203441-b41be1df6967
 	github.com/sirupsen/logrus v1.4.1
 	github.com/spf13/cobra v0.0.3
 	github.com/spf13/pflag v1.0.3
+	github.com/spf13/viper v1.4.0
 	github.com/stretchr/objx v0.1.1
 	github.com/stretchr/testify v1.3.0
 	github.com/theupdateframework/notary v0.6.1
-	github.com/urfave/cli v1.20.0
 	github.com/vbatts/tar-split v0.11.1 // indirect
 	golang.org/x/crypto v0.0.0-20190403202508-8e1b8d32e692
-	golang.org/x/net v0.0.0-20190403144856-b630fd6fe46b
+	golang.org/x/net v0.0.0-20190522155817-f3200d17e092
 	golang.org/x/sys v0.0.0-20190403152447-81d4e9dc473e
-	golang.org/x/time v0.0.0-20190308202827-9d24e82272b4 // indirect
+	google.golang.org/appengine v1.4.0 // indirect
 	google.golang.org/genproto v0.0.0-20190401181712-f467c93bbac2
-	google.golang.org/grpc v1.19.1
+	google.golang.org/grpc v1.21.0
 	gotest.tools v2.2.0+incompatible // indirect
 )

go.sum

@@ -4,22 +4,34 @@ github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/Microsoft/go-winio v0.4.12 h1:xAfWHN1IrQ0NJ9TBC0KBZoqLjzDTr1ML+4MywiUOryc=
 github.com/Microsoft/go-winio v0.4.12/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcyvVC4A4RozmA=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/agl/ed25519 v0.0.0-20170116200512-5312a6153412 h1:w1UutsfOrms1J05zt7ISrnJIXKzwaspym5BTKGx93EI=
 github.com/agl/ed25519 v0.0.0-20170116200512-5312a6153412/go.mod h1:WPjqKcmVOxf0XSf3YxCJs6N6AOSrOx3obionmG7T0y0=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 h1:xJ4a3vCFaGF/jqvzLMYoU8P317H5OQ+Via4RmuPwCS0=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
+github.com/beorn7/perks v1.0.0 h1:HWo1m869IqiPhD389kmkxeTalrjNbbJTC8LXupb+sl0=
+github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/brysgo/gomock_ginkgo v0.0.0-20180512161304-be2c1b0e4111 h1:gRfsoKtF1tba+hVsNgo7OKG7a35hBK30ouOTHPgqFf8=
 github.com/brysgo/gomock_ginkgo v0.0.0-20180512161304-be2c1b0e4111/go.mod h1:H1ipqq0hhUWJgVeQ5dbUe/C8YptJrE/VGDQp9bI+qTo=
+github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/containerd/containerd v1.2.6 h1:K38ZSAA9oKSrX3iFNY+4SddZ8hH1TCMCerc8NHfcKBQ=
 github.com/containerd/containerd v1.2.6/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA=
 github.com/containerd/continuity v0.0.0-20181203112020-004b46473808 h1:4BX8f882bXEDKfWIf0wa8HRvpnBoPszJJXL+TVbBw4M=
 github.com/containerd/continuity v0.0.0-20181203112020-004b46473808/go.mod h1:GL3xCUCBDV3CZiTSEKksMWbLE66hEyuu9qyDOOqM47Y=
+github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
+github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
+github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
+github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
 github.com/docker/cli v0.0.0-20190327152802-57b27434ea29 h1:ciaXDHaWQda0nvevWqcjtXX/buQY3e0lga1vq8Batq0=
 github.com/docker/cli v0.0.0-20190327152802-57b27434ea29/go.mod h1:JLrzqnKDaYBop7H2jaqPtU4hHvMKP+vjCwu2uszcLI8=
 github.com/docker/distribution v2.7.1+incompatible h1:a5mlkVzth6W5A4fOsS3D2EO5BUmsJpcB+cRlLU7cSug=
@@ -40,21 +52,29 @@ github.com/docker/swarmkit v1.12.0 h1:vcbNXevt9xOod0miQxkp9WZ70IsOCe8geXkmFnXP2e
 github.com/docker/swarmkit v1.12.0/go.mod h1:n3Z4lIEl7g261ptkGDBcYi/3qBMDl9csaAhwi2MPejs=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
+github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
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@@ -62,6 +82,8 @@ github.com/hashicorp/go-uuid v1.0.0/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/b
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@@ -70,6 +92,7 @@ github.com/johntdyer/slack-go v0.0.0-20180213144715-95fac1160b22 h1:jKUP9TQ0c7X3
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@@ -77,13 +100,21 @@ github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxv
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@@ -98,6 +129,8 @@ github.com/opencontainers/runc v0.1.1/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59P
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@@ -106,25 +139,44 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
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 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190403202508-8e1b8d32e692 h1:GRhHqDOgeDr6QDTtq9gn2O4iKvm5dsbfqD/TXb0KLX0=
@@ -143,14 +201,19 @@ golang.org/x/crypto v0.0.0-20190403202508-8e1b8d32e692/go.mod h1:WFFai1msRO1wXaE
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
+golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181201002055-351d144fa1fc/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190403144856-b630fd6fe46b h1:/zjbcJPEGAyu6Is/VBOALsgdi4z9+kz/Vtdm6S+beD0=
 golang.org/x/net v0.0.0-20190403144856-b630fd6fe46b/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190522155817-f3200d17e092 h1:4QSRKanuywn15aTZvI/mIDEgPQpswuFndXpOj3rKEco=
+golang.org/x/net v0.0.0-20190522155817-f3200d17e092/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -160,16 +223,19 @@ golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190403152447-81d4e9dc473e h1:nFYrTHrdrAOpShe27kaFHjsqYSEQ0KWqdWLu3xuZJts=
 golang.org/x/sys v0.0.0-20190403152447-81d4e9dc473e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4 h1:SvFZT6jyqRaOeXpc5h/JSfZenJ2O330aBsf7JfSUXmQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
+golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 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=
@@ -178,12 +244,19 @@ google.golang.org/genproto v0.0.0-20190401181712-f467c93bbac2/go.mod h1:VzzqZJRn
 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=
+google.golang.org/grpc v1.21.0 h1:G+97AoqBnmZIT91cLG/EkCoK9NSelj64P8bOHHNmGn0=
+google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
 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/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

internal/flags/flags.go

@@ -0,0 +1,269 @@
+package flags
+
+import (
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	"os"
+	"time"
+)
+
+func RegisterDockerFlags(rootCmd *cobra.Command) {
+	flags := rootCmd.PersistentFlags()
+	flags.StringP("host", "H", viper.GetString("DOCKER_HOST"), "daemon socket to connect to")
+	flags.BoolP("tlsverify", "v", viper.GetBool("DOCKER_TLS_VERIFY"), "use TLS and verify the remote")
+}
+
+func RegisterSystemFlags(rootCmd *cobra.Command) {
+	flags := rootCmd.PersistentFlags()
+	flags.IntP(
+		"interval",
+		"i",
+		viper.GetInt("WATCHTOWER_POLL_INTERVAL"),
+		"poll interval (in seconds)")
+
+	flags.StringP("schedule",
+		"s",
+		viper.GetString("WATCHTOWER_SCHEDULE"),
+		"the cron expression which defines when to update")
+
+	flags.DurationP("stop-timeout",
+		"t",
+		viper.GetDuration("WATCHTOWER_TIMEOUT"),
+		"timeout before a container is forcefully stopped")
+
+	flags.BoolP(
+		"no-pull",
+		"",
+		viper.GetBool("WATCHTOWER_NO_PULL"),
+		"do not pull any new images")
+
+	flags.BoolP(
+		"no-restart",
+		"",
+		viper.GetBool("WATCHTOWER_NO_RESTART"),
+		"do not restart any containers")
+
+	flags.BoolP(
+		"cleanup",
+		"c",
+		viper.GetBool("WATCHTOWER_CLEANUP"),
+		"remove previously used images after updating")
+
+	flags.BoolP(
+		"label-enable",
+		"e",
+		viper.GetBool("WATCHTOWER_LABEL_ENABLE"),
+		"watch containers where the com.centurylinklabs.watchtower.enable label is true")
+
+	flags.BoolP(
+		"debug",
+		"d",
+		viper.GetBool("WATCHTOWER_DEBUG"),
+		"enable debug mode with verbose logging")
+
+
+	flags.BoolP(
+		"monitor-only",
+		"m",
+		viper.GetBool("WATCHTOWER_MONITOR_ONLY"),
+		"Will only monitor for new images, not update the containers")
+
+	flags.BoolP(
+		"run-once",
+		"R",
+		viper.GetBool("WATCHTOWER_RUN_ONCE"),
+		"Run once now and exit")
+
+	flags.BoolP(
+		"include-stopped",
+		"S",
+		viper.GetBool("WATCHTOWER_INCLUDE_STOPPED"),
+		"Will also include created and exited containers")
+}
+
+func RegisterNotificationFlags(rootCmd *cobra.Command) {
+	flags := rootCmd.PersistentFlags()
+
+	flags.StringSliceP(
+		"notifications",
+		"n",
+		viper.GetStringSlice("WATCHTOWER_NOTIFICATIONS"),
+		" notification types to send (valid: email, slack, msteams")
+
+	flags.StringP(
+		"notifications-level",
+		"",
+		viper.GetString("WATCHTOWER_NOTIFICATIONS_LEVEL"),
+		"The log level used for sending notifications. Possible values: panic, fatal, error, warn, info or debug")
+
+	flags.StringP(
+		"notification-email-from",
+		"",
+		viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_FROM"),
+		"Address to send notification emails from")
+
+	flags.StringP(
+		"notification-email-to",
+		"",
+		viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_TO"),
+		"Address to send notification emails to")
+
+	flags.StringP(
+		"notification-email-server",
+		"",
+		viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_SERVER"),
+		"SMTP server to send notification emails through")
+
+	flags.StringP(
+		"notification-email-server-port",
+		"",
+		viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT"),
+		"SMTP server port to send notification emails through")
+
+	flags.BoolP(
+		"notification-email-server-tls-skip-verify",
+		"",
+		viper.GetBool("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_TLS_SKIP_VERIFY"),
+		`
+Controls whether watchtower verifies the SMTP server's certificate chain and host name.
+Should only be used for testing.
+`)
+
+	flags.StringP(
+		"notification-email-server-user",
+		"",
+		viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_USER"),
+		"SMTP server user for sending notifications")
+
+	flags.StringP(
+		"notification-email-server-password",
+		"",
+		viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD"),
+		"SMTP server password for sending notifications")
+
+	flags.StringP(
+		"notification-slack-hook-url",
+		"",
+		viper.GetString("WATCHTOWER_NOTIFICATION_SLACK_HOOK_URL"),
+		"The Slack Hook URL to send notifications to")
+
+	flags.StringP(
+		"notification-slack-identifier",
+		"",
+		viper.GetString("WATCHTOWER_NOTIFICATION_SLACK_IDENTIFIER"),
+		"A string which will be used to identify the messages coming from this watchtower instance")
+
+	flags.StringP(
+		"notification-slack-channel",
+		"",
+		viper.GetString("WATCHTOWER_NOTIFICATION_SLACK_CHANNEL"),
+		"A string which overrides the webhook's default channel. Example: #my-custom-channel")
+
+	flags.StringP(
+		"notification-slack-icon-emoji",
+		"",
+		viper.GetString("WATCHTOWER_NOTIFICATION_SLACK_ICON_EMOJI"),
+		"An emoji code string to use in place of the default icon")
+
+	flags.StringP(
+		"notification-slack-icon-url",
+		"",
+		viper.GetString("WATCHTOWER_NOTIFICATION_SLACK_ICON_URL"),
+		"An icon image URL string to use in place of the default icon")
+
+	flags.StringP(
+		"notification-msteams-hook",
+		"",
+		viper.GetString("WATCHTOWER_NOTIFICATION_MSTEAMS_HOOK_URL"),
+		"The MSTeams WebHook URL to send notifications to")
+
+	flags.BoolP(
+		"notification-msteams-data",
+		"",
+		viper.GetBool("WATCHTOWER_NOTIFICATION_MSTEAMS_USE_LOG_DATA"),
+		"The MSTeams notifier will try to extract log entry fields as MSTeams message facts")
+}
+
+func SetDefaults() {
+	viper.AutomaticEnv()
+	viper.SetDefault("DOCKER_HOST", "unix:///var/run/docker.sock")
+	viper.SetDefault("WATCHTOWER_POLL_INTERVAL", 300)
+	viper.SetDefault("WATCHTOWER_TIMEOUT", time.Second*10)
+	viper.SetDefault("WATCHTOWER_NOTIFICATIONS", []string{})
+	viper.SetDefault("WATCHTOWER_NOTIFICATIONS_LEVEL", "info")
+	viper.SetDefault("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT", 25)
+	viper.SetDefault("WATCHTOWER_NOTIFICATION_SLACK_IDENTIFIER", "watchtower")
+}
+
+// envConfig translates the command-line options into environment variables
+// that will initialize the api client
+func EnvConfig(cmd *cobra.Command, dockerAPIMinVersion string) error {
+	var err error
+	var host string
+	var tls bool
+
+	flags := cmd.PersistentFlags()
+
+	if host, err = flags.GetString("host"); err != nil {
+		return err
+	}
+	if tls, err = flags.GetBool("tlsverify"); err != nil {
+		return err
+	}
+	if err = setEnvOptStr("DOCKER_HOST", host); err != nil {
+		return err
+	}
+	if err = setEnvOptBool("DOCKER_TLS_VERIFY", tls); err != nil {
+		return err
+	}
+	if err = setEnvOptStr("DOCKER_API_VERSION", dockerAPIMinVersion); err != nil {
+		return err
+	}
+	return nil
+}
+
+func ReadFlags(cmd *cobra.Command) (bool, bool, bool, time.Duration) {
+	flags := cmd.PersistentFlags()
+
+	var err error
+	var cleanup bool
+	var noRestart bool
+	var monitorOnly bool
+	var timeout time.Duration
+
+	if cleanup, err = flags.GetBool("cleanup"); err != nil {
+		log.Fatal(err)
+	}
+	if noRestart, err = flags.GetBool("no-restart"); err != nil {
+		log.Fatal(err)
+	}
+	if monitorOnly, err = flags.GetBool("monitor-only"); err != nil {
+		log.Fatal(err)
+	}
+	if timeout, err = flags.GetDuration("stop-timeout"); err != nil {
+		log.Fatal(err)
+	}
+
+	return cleanup, noRestart, monitorOnly, timeout
+}
+
+
+func setEnvOptStr(env string, opt string) error {
+	if opt == "" || opt == os.Getenv(env) {
+		return nil
+	}
+	err := os.Setenv(env, opt)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func setEnvOptBool(env string, opt bool) error {
+	if opt == true {
+		return setEnvOptStr(env, "1")
+	}
+	return nil
+}
+

main.go

@@ -1,213 +1,21 @@
 package main // import "github.com/containrrr/watchtower"
 
 import (
-	"os"
-	"os/signal"
-	"syscall"
-	"time"
-
-	"strconv"
-
-	"github.com/containrrr/watchtower/actions"
-	cliApp "github.com/containrrr/watchtower/app"
-	"github.com/containrrr/watchtower/container"
-	"github.com/containrrr/watchtower/notifications"
-	"github.com/robfig/cron"
+	"github.com/containrrr/watchtower/cmd"
 	log "github.com/sirupsen/logrus"
-	"github.com/urfave/cli"
 )
 
 // DockerAPIMinVersion is the version of the docker API, which is minimally required by
 // watchtower. Currently we require at least API 1.24 and therefore Docker 1.12 or later.
-const DockerAPIMinVersion string = "1.24"
 
 var version = "master"
 var commit = "unknown"
 var date = "unknown"
 
-var (
-	client       container.Client
-	scheduleSpec string
-	cleanup      bool
-	noRestart    bool
-	monitorOnly  bool
-	enableLabel  bool
-	notifier     *notifications.Notifier
-	timeout      time.Duration
-)
-
 func init() {
 	log.SetLevel(log.InfoLevel)
 }
 
 func main() {
-	app := cli.NewApp()
-	InitApp(app)
-	cliApp.SetupCliFlags(app)
-
-	if err := app.Run(os.Args); err != nil {
-		log.Fatal(err)
-	}
-}
-
-// InitApp initializes urfave app metadata and sets up entrypoints
-func InitApp(app *cli.App) {
-	app.Name = "watchtower"
-	app.Version = version + " - " + commit + " - " + date
-	app.Usage = "Automatically update running Docker containers"
-	app.Before = before
-	app.Action = start
-}
-
-func before(c *cli.Context) error {
-	if c.GlobalBool("debug") {
-		log.SetLevel(log.DebugLevel)
-	}
-
-	pollingSet := c.IsSet("interval")
-	cronSet := c.IsSet("schedule")
-	cronLen := len(c.String("schedule"))
-
-	if pollingSet && cronSet && cronLen > 0 {
-		log.Fatal("Only schedule or interval can be defined, not both.")
-	} else if cronSet && cronLen > 0 {
-		scheduleSpec = c.String("schedule")
-	} else {
-		scheduleSpec = "@every " + strconv.Itoa(c.Int("interval")) + "s"
-	}
-
-	readFlags(c)
-
-	if timeout < 0 {
-		log.Fatal("Please specify a positive value for timeout value.")
-	}
-	enableLabel = c.GlobalBool("label-enable")
-
-	// configure environment vars for client
-	err := envConfig(c)
-	if err != nil {
-		return err
-	}
-
-	client = container.NewClient(
-		!c.GlobalBool("no-pull"),
-		c.GlobalBool("include-stopped"),
-	)
-	notifier = notifications.NewNotifier(c)
-
-	return nil
-}
-
-func start(c *cli.Context) error {
-	names := c.Args()
-	filter := container.BuildFilter(names, enableLabel)
-
-	if c.GlobalBool("run-once") {
-		log.Info("Running a one time update.")
-		runUpdatesWithNotifications(filter)
-		os.Exit(1)
-		return nil
-	}
-
-	if err := actions.CheckForMultipleWatchtowerInstances(client, cleanup); err != nil {
-		log.Fatal(err)
-	}
-
-	runUpgradesOnSchedule(filter)
-	os.Exit(1)
-	return nil
-}
-
-func runUpgradesOnSchedule(filter container.Filter) error {
-	tryLockSem := make(chan bool, 1)
-	tryLockSem <- true
-
-	cron := cron.New()
-	err := cron.AddFunc(
-		scheduleSpec,
-		func() {
-			select {
-			case v := <-tryLockSem:
-				defer func() { tryLockSem <- v }()
-				runUpdatesWithNotifications(filter)
-			default:
-				log.Debug("Skipped another update already running.")
-			}
-
-			nextRuns := cron.Entries()
-			if len(nextRuns) > 0 {
-				log.Debug("Scheduled next run: " + nextRuns[0].Next.String())
-			}
-		})
-
-	if err != nil {
-		return err
-	}
-
-	log.Debug("Starting Watchtower and scheduling first run: " + cron.Entries()[0].Schedule.Next(time.Now()).String())
-	cron.Start()
-
-	// Graceful shut-down on SIGINT/SIGTERM
-	interrupt := make(chan os.Signal, 1)
-	signal.Notify(interrupt, os.Interrupt)
-	signal.Notify(interrupt, syscall.SIGTERM)
-
-	<-interrupt
-	cron.Stop()
-	log.Info("Waiting for running update to be finished...")
-	<-tryLockSem
-	return nil
-}
-
-func runUpdatesWithNotifications(filter container.Filter) {
-	notifier.StartNotification()
-	updateParams := actions.UpdateParams{
-		Filter:      filter,
-		Cleanup:     cleanup,
-		NoRestart:   noRestart,
-		Timeout:     timeout,
-		MonitorOnly: monitorOnly,
-	}
-	err := actions.Update(client, updateParams)
-	if err != nil {
-		log.Println(err)
-	}
-	notifier.SendNotification()
-}
-
-func setEnvOptStr(env string, opt string) error {
-	if opt == "" || opt == os.Getenv(env) {
-		return nil
-	}
-	err := os.Setenv(env, opt)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-func setEnvOptBool(env string, opt bool) error {
-	if opt == true {
-		return setEnvOptStr(env, "1")
-	}
-	return nil
-}
-
-// envConfig translates the command-line options into environment variables
-// that will initialize the api client
-func envConfig(c *cli.Context) error {
-	var err error
-
-	err = setEnvOptStr("DOCKER_HOST", c.GlobalString("host"))
-	err = setEnvOptBool("DOCKER_TLS_VERIFY", c.GlobalBool("tlsverify"))
-	err = setEnvOptStr("DOCKER_API_VERSION", DockerAPIMinVersion)
-
-	return err
-}
-
-func readFlags(c *cli.Context) {
-	cleanup = c.GlobalBool("cleanup")
-	noRestart = c.GlobalBool("no-restart")
-	monitorOnly = c.GlobalBool("monitor-only")
-	timeout = c.GlobalDuration("stop-timeout")
+    cmd.Execute()
 }

notifications/email.go

@@ -3,6 +3,7 @@ package notifications
 import (
 	"encoding/base64"
 	"fmt"
+	"github.com/spf13/cobra"
 	"net/smtp"
 	"os"
 	"time"
@@ -10,7 +11,6 @@ import (
 	"strconv"
 
 	log "github.com/sirupsen/logrus"
-	"github.com/urfave/cli"
 )
 
 const (
@@ -31,15 +31,25 @@ type emailTypeNotifier struct {
 	logLevels              []log.Level
 }
 
-func newEmailNotifier(c *cli.Context, acceptedLogLevels []log.Level) typeNotifier {
+func newEmailNotifier(c *cobra.Command, acceptedLogLevels []log.Level) typeNotifier {
+	flags := c.PersistentFlags()
+
+	from, _ := flags.GetString("notification-email-from")
+	to, _  := flags.GetString("notification-email-to")
+	server, _  := flags.GetString("notification-email-server")
+	user, _ := flags.GetString("notification-email-server-user")
+	password, _ := flags.GetString("notification-email-server-password")
+	port, _ := flags.GetInt("notification-email-server-port")
+	tlsSkipVerify, _ := flags.GetBool("notification-email-server-tls-skip-verify")
+
 	n := &emailTypeNotifier{
-		From:          c.GlobalString("notification-email-from"),
-		To:            c.GlobalString("notification-email-to"),
-		Server:        c.GlobalString("notification-email-server"),
-		User:          c.GlobalString("notification-email-server-user"),
-		Password:      c.GlobalString("notification-email-server-password"),
-		Port:          c.GlobalInt("notification-email-server-port"),
-		tlsSkipVerify: c.GlobalBool("notification-email-server-tls-skip-verify"),
+		From:          from,
+		To:            to,
+		Server:        server,
+		User:          user,
+		Password:      password,
+		Port:          port,
+		tlsSkipVerify: tlsSkipVerify,
 		logLevels:     acceptedLogLevels,
 	}
 

notifications/msteams.go

@@ -4,10 +4,10 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"github.com/spf13/cobra"
 	"net/http"
 
 	log "github.com/sirupsen/logrus"
-	"github.com/urfave/cli"
 	"io/ioutil"
 )
 
@@ -21,17 +21,20 @@ type msTeamsTypeNotifier struct {
 	data       bool
 }
 
-func newMsTeamsNotifier(c *cli.Context, acceptedLogLevels []log.Level) typeNotifier {
+func newMsTeamsNotifier(cmd *cobra.Command, acceptedLogLevels []log.Level) typeNotifier {
 
-	webHookURL := c.GlobalString("notification-msteams-hook")
+	flags := cmd.PersistentFlags()
+
+	webHookURL, _ := flags.GetString("notification-msteams-hook")
 	if len(webHookURL) <= 0 {
 		log.Fatal("Required argument --notification-msteams-hook(cli) or WATCHTOWER_NOTIFICATION_MSTEAMS_HOOK_URL(env) is empty.")
 	}
 
+	withData, _ := flags.GetBool("notification-msteams-data")
 	n := &msTeamsTypeNotifier{
 		levels:     acceptedLogLevels,
 		webHookURL: webHookURL,
-		data:       c.GlobalBool("notification-msteams-data"),
+		data:       withData,
 	}
 
 	log.AddHook(n)

notifications/notifier.go

@@ -3,7 +3,7 @@ package notifications
 import (
 	"github.com/johntdyer/slackrus"
 	log "github.com/sirupsen/logrus"
-	"github.com/urfave/cli"
+	"github.com/spf13/cobra"
 )
 
 type typeNotifier interface {
@@ -17,10 +17,13 @@ type Notifier struct {
 }
 
 // NewNotifier creates and returns a new Notifier, using global configuration.
-func NewNotifier(c *cli.Context) *Notifier {
+func NewNotifier(c *cobra.Command) *Notifier {
 	n := &Notifier{}
 
-	logLevel, err := log.ParseLevel(c.GlobalString("notifications-level"))
+	f := c.PersistentFlags()
+
+	level, _ := f.GetString("notifications-level")
+	logLevel, err := log.ParseLevel(level)
 	if err != nil {
 		log.Fatalf("Notifications invalid log level: %s", err.Error())
 	}
@@ -28,7 +31,8 @@ func NewNotifier(c *cli.Context) *Notifier {
 	acceptedLogLevels := slackrus.LevelThreshold(logLevel)
 
 	// Parse types and create notifiers.
-	types := c.GlobalStringSlice("notifications")
+	types, _ := f.GetStringSlice("notifications")
+
 	for _, t := range types {
 		var tn typeNotifier
 		switch t {

notifications/slack.go

@@ -3,7 +3,7 @@ package notifications
 import (
 	"github.com/johntdyer/slackrus"
 	log "github.com/sirupsen/logrus"
-	"github.com/urfave/cli"
+	"github.com/spf13/cobra"
 )
 
 const (
@@ -14,20 +14,27 @@ type slackTypeNotifier struct {
 	slackrus.SlackrusHook
 }
 
-func newSlackNotifier(c *cli.Context, acceptedLogLevels []log.Level) typeNotifier {
+func newSlackNotifier(c *cobra.Command, acceptedLogLevels []log.Level) typeNotifier {
+	flags := c.PersistentFlags()
+
+	hookUrl,  _ := flags.GetString("notification-slack-hook-url")
+	userName, _ := flags.GetString("notification-slack-identifier")
+	channel,  _ := flags.GetString("notification-slack-channel")
+	emoji,    _ := flags.GetString("notification-slack-icon-emoji")
+	iconUrl,  _ := flags.GetString("notification-slack-icon-url")
+
 	n := &slackTypeNotifier{
 		SlackrusHook: slackrus.SlackrusHook{
-			HookURL:        c.GlobalString("notification-slack-hook-url"),
-			Username:       c.GlobalString("notification-slack-identifier"),
-			Channel:        c.GlobalString("notification-slack-channel"),
-			IconEmoji:      c.GlobalString("notification-slack-icon-emoji"),
-			IconURL:        c.GlobalString("notification-slack-icon-url"),
+			HookURL:        hookUrl,
+			Username:       userName,
+			Channel:        channel,
+			IconEmoji:      emoji,
+			IconURL:        iconUrl,
 			AcceptedLevels: acceptedLogLevels,
 		},
 	}
 
 	log.AddHook(n)
-
 	return n
 }