build: display docker desktop build details link

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

Author: crazy-max

build/build.go

@@ -26,6 +26,7 @@ import (
 	"github.com/docker/buildx/builder"
 	"github.com/docker/buildx/driver"
 	"github.com/docker/buildx/localstate"
+	"github.com/docker/buildx/util/desktop"
 	"github.com/docker/buildx/util/dockerutil"
 	"github.com/docker/buildx/util/imagetools"
 	"github.com/docker/buildx/util/progress"
@@ -719,7 +720,6 @@ func BuildWithResultHandler(ctx context.Context, nodes []builder.Node, opt map[s
 	}()
 
 	eg, ctx := errgroup.WithContext(ctx)
-
 	for k, opt := range opt {
 		multiDriver := len(m[k]) > 1
 		hasMobyDriver := false
@@ -799,6 +799,9 @@ func BuildWithResultHandler(ctx context.Context, nodes []builder.Node, opt map[s
 	var respMu sync.Mutex
 	results := waitmap.New()
 
+	buildDetailsOpts := make(map[string]desktop.BuildDetailsOpt)
+	defer func() { logrus.Printf(desktop.BuildDetailsOutput(buildDetailsOpts)) }()
+
 	multiTarget := len(opt) > 1
 
 	for k, opt := range opt {
@@ -822,6 +825,7 @@ func BuildWithResultHandler(ctx context.Context, nodes []builder.Node, opt map[s
 
 			for i, dp := range dps {
 				i, dp, so := i, dp, *dp.so
+				node := nodes[dp.driverIndex]
 				if multiDriver {
 					for i, e := range so.Exports {
 						switch e.Type {
@@ -929,6 +933,13 @@ func BuildWithResultHandler(ctx context.Context, nodes []builder.Node, opt map[s
 								printRes = res.Metadata
 							}
 							results.Set(resultKey(dp.driverIndex, k), res)
+							if node.Driver.Features()[driver.HistoryAPI] && desktop.BuildBackendEnabled() {
+								buildDetailsOpts[k] = desktop.BuildDetailsOpt{
+									Builder: node.Builder,
+									Node:    node.Name,
+									Ref:     so.Ref,
+								}
+							}
 							if resultHandleFunc != nil {
 								resultCtx, err := NewResultContext(ctx, cc, so, res)
 								if err == nil {

util/desktop/desktop.go

@@ -0,0 +1,54 @@
+package desktop
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"path/filepath"
+	"sync"
+)
+
+var (
+	bbEnabledOnce sync.Once
+	bbEnabled     bool
+)
+
+func BuildBackendEnabled() bool {
+	bbEnabledOnce.Do(func() {
+		home, err := os.UserHomeDir()
+		if err != nil {
+			return
+		}
+		_, err = os.Stat(filepath.Join(home, ".docker", "desktop-build", ".lastaccess"))
+		bbEnabled = err == nil
+	})
+	return bbEnabled
+}
+
+type BuildDetailsOpt struct {
+	Builder string
+	Node    string
+	Ref     string
+}
+
+func BuildDetailsOutput(opts map[string]BuildDetailsOpt) string {
+	var out bytes.Buffer
+	out.WriteString("Open build details on Docker Desktop: ")
+	multiTargets := len(opts) > 1
+	if multiTargets {
+		out.WriteString("\n")
+	}
+	for target, opt := range opts {
+		url := fmt.Sprintf("docker-desktop://dashboard/build/%s/%s/%s", opt.Builder, opt.Node, opt.Ref)
+		if multiTargets {
+			out.WriteString(fmt.Sprintf("  %s: ", target))
+		}
+		out.WriteString(hyperlink(url, url))
+	}
+	return out.String()
+}
+
+func hyperlink(url, text string) string {
+	// create an escape sequence using the OSC 8 format: https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
+	return fmt.Sprintf("\033]8;;%s\033\\%s\033]8;;\033\\\n", url, text)
+}