feat(multiwerf): print multiwerf deprecation warning if multiwerf out…

…dated

cmd/werf/build_and_publish/main.go

@@ -119,6 +119,8 @@ func runBuildAndPublish(imagesToProcess []string) error {
 	tmp_manager.AutoGCEnabled = true
 	ctx := common.BackgroundContext()
 
+	werf.PostponeMultiwerfNotUpToDateWarning()
+
 	if err := werf.Init(*commonCmdData.TmpDir, *commonCmdData.HomeDir); err != nil {
 		return fmt.Errorf("initialization error: %s", err)
 	}

cmd/werf/converge/converge.go

@@ -125,6 +125,8 @@ func runConverge() error {
 	tmp_manager.AutoGCEnabled = true
 	ctx := common.BackgroundContext()
 
+	werf.PostponeMultiwerfNotUpToDateWarning()
+
 	if err := werf.Init(*commonCmdData.TmpDir, *commonCmdData.HomeDir); err != nil {
 		return fmt.Errorf("initialization error: %s", err)
 	}

cmd/werf/deploy/main.go

@@ -128,6 +128,8 @@ func runDeploy() error {
 	tmp_manager.AutoGCEnabled = true
 	ctx := common.BackgroundContext()
 
+	werf.PostponeMultiwerfNotUpToDateWarning()
+
 	if err := werf.Init(*commonCmdData.TmpDir, *commonCmdData.HomeDir); err != nil {
 		return fmt.Errorf("initialization error: %s", err)
 	}

cmd/werf/deploy_v2/main.go

@@ -142,6 +142,8 @@ func runDeploy() error {
 	tmp_manager.AutoGCEnabled = true
 	ctx := common.BackgroundContext()
 
+	werf.PostponeMultiwerfNotUpToDateWarning()
+
 	if err := werf.Init(*commonCmdData.TmpDir, *commonCmdData.HomeDir); err != nil {
 		return fmt.Errorf("initialization error: %s", err)
 	}

cmd/werf/images/publish/cmd_factory/main.go

@@ -89,6 +89,8 @@ If one or more IMAGE_NAME parameters specified, werf will publish only these ima
 func runImagesPublish(commonCmdData *common.CmdData, imagesToProcess []string) error {
 	ctx := common.BackgroundContext()
 
+	werf.PostponeMultiwerfNotUpToDateWarning()
+
 	if err := werf.Init(*commonCmdData.TmpDir, *commonCmdData.HomeDir); err != nil {
 		return fmt.Errorf("initialization error: %s", err)
 	}

cmd/werf/run/run.go

@@ -168,6 +168,8 @@ func processArgs(cmd *cobra.Command, args []string) error {
 func runRun() error {
 	ctx := common.BackgroundContext()
 
+	werf.PostponeMultiwerfNotUpToDateWarning()
+
 	if err := werf.Init(*commonCmdData.TmpDir, *commonCmdData.HomeDir); err != nil {
 		return fmt.Errorf("initialization error: %s", err)
 	}

cmd/werf/stages/build/cmd_factory/main.go

@@ -107,6 +107,8 @@ func runStagesBuild(cmdData *CmdData, commonCmdData *common.CmdData, imagesToPro
 	tmp_manager.AutoGCEnabled = true
 	ctx := common.BackgroundContext()
 
+	werf.PostponeMultiwerfNotUpToDateWarning()
+
 	if err := werf.Init(*commonCmdData.TmpDir, *commonCmdData.HomeDir); err != nil {
 		return fmt.Errorf("initialization error: %s", err)
 	}

pkg/werf/global_warnings.go

@@ -1,11 +1,18 @@
 package werf
 
 import (
+	"bytes"
 	"context"
+	"fmt"
+	"os/exec"
+	"regexp"
 
+	"github.com/Masterminds/semver"
 	"github.com/werf/logboek"
 )
 
+const LastMultiwerfVersion = "1.5.0"
+
 var (
 	GlobalWarningLines []string
 )
@@ -21,6 +28,56 @@ func GlobalWarningLn(ctx context.Context, line string) {
 	printGlobalWarningLn(ctx, line)
 }
 
+func IsMultiwerfUpToDate() (bool, error) {
+	multiwerfPath, err := exec.LookPath("multiwerf")
+	if err != nil {
+		return true, nil
+	}
+
+	cmd := exec.Command(multiwerfPath, "version")
+	var stdout bytes.Buffer
+	cmd.Stdout = &stdout
+	if err := cmd.Run(); err != nil {
+		return false, fmt.Errorf("unable to get installed version of multiwerf: %s", err)
+	}
+
+	versionRegex := regexp.MustCompile(`^multiwerf v([.0-9]+)\s*$`)
+	regexResult := versionRegex.FindStringSubmatch(stdout.String())
+	if len(regexResult) != 2 {
+		return false, fmt.Errorf("\"multiwerf version\" returned unexpected output: %s", stdout.String())
+	}
+	installedMultiwerfVersion, err := semver.NewVersion(regexResult[1])
+	if err != nil {
+		return false, fmt.Errorf("unable to parse version of installed multiwerf version: %s", err)
+	}
+
+	lastMultiwerfVersion, err := semver.NewVersion(LastMultiwerfVersion)
+	if err != nil {
+		return false, fmt.Errorf("unable to parse version of last available multiwerf version: %s", err)
+	}
+
+	return !installedMultiwerfVersion.LessThan(lastMultiwerfVersion), nil
+}
+
+func PostponeMultiwerfNotUpToDateWarning() {
+	if multiwerfIsUpToDate, err := IsMultiwerfUpToDate(); err != nil {
+		GlobalWarningLines = append(
+			GlobalWarningLines,
+			fmt.Sprintf("Failure detecting whether multiwerf (if present) is outdated: %s", err),
+			"Multiwerf is deprecated, so if you are still using it we strongly recommend removing multiwerf and switching to trdl by following these instructions: https://werf.io/installation.html",
+		)
+		return
+	} else if multiwerfIsUpToDate {
+		return
+	}
+
+	GlobalWarningLines = append(
+		GlobalWarningLines,
+		"Multiwerf detected, but is out of date. Multiwerf is deprecated in favor of trdl: https://github.com/werf/trdl",
+		"If you are still using multiwerf we strongly recommend removing multiwerf and switching to trdl by following these instructions: https://werf.io/installation.html",
+	)
+}
+
 func printGlobalWarningLn(ctx context.Context, line string) {
 	logboek.Context(ctx).Error().LogF("WARNING: %s\n", line)
 }