progessui: return warnings from printer

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

examples/build-using-dockerfile/main.go

@@ -107,7 +107,8 @@ func action(clicontext *cli.Context) error {
 			c = cn
 		}
 		// not using shared context to not disrupt display but let is finish reporting errors
-		return progressui.DisplaySolveStatus(context.TODO(), "", c, os.Stdout, ch)
+		_, err = progressui.DisplaySolveStatus(context.TODO(), "", c, os.Stdout, ch)
+		return err
 	})
 	eg.Go(func() error {
 		if err := loadDockerTar(pipeR); err != nil {

util/progress/progressui/display.go

@@ -21,7 +21,7 @@ import (
 	"golang.org/x/time/rate"
 )
 
-func DisplaySolveStatus(ctx context.Context, phase string, c console.Console, w io.Writer, ch chan *client.SolveStatus) error {
+func DisplaySolveStatus(ctx context.Context, phase string, c console.Console, w io.Writer, ch chan *client.SolveStatus) ([]client.VertexWarning, error) {
 	modeConsole := c != nil
 
 	disp := &display{c: c, phase: phase}
@@ -57,7 +57,7 @@ func DisplaySolveStatus(ctx context.Context, phase string, c console.Console, w
 	for {
 		select {
 		case <-ctx.Done():
-			return ctx.Err()
+			return nil, ctx.Err()
 		case <-ticker.C:
 		case ss, ok := <-ch:
 			if ok {
@@ -72,7 +72,7 @@ func DisplaySolveStatus(ctx context.Context, phase string, c console.Console, w
 			if done {
 				disp.print(t.displayInfo(), width, height, true)
 				t.printErrorLogs(c)
-				return nil
+				return t.warnings(), nil
 			} else if displayLimiter.Allow() {
 				ticker.Stop()
 				ticker = time.NewTicker(tickerTimeout)
@@ -83,7 +83,7 @@ func DisplaySolveStatus(ctx context.Context, phase string, c console.Console, w
 				printer.print(t)
 				if done {
 					t.printErrorLogs(w)
-					return nil
+					return t.warnings(), nil
 				}
 				ticker.Stop()
 				ticker = time.NewTicker(tickerTimeout)
@@ -172,6 +172,14 @@ func newTrace(w io.Writer, modeConsole bool) *trace {
 	}
 }
 
+func (t *trace) warnings() []client.VertexWarning {
+	var out []client.VertexWarning
+	for _, v := range t.vertexes {
+		out = append(out, v.warnings...)
+	}
+	return out
+}
+
 func (t *trace) triggerVertexEvent(v *client.Vertex) {
 	if v.Started == nil {
 		return

util/progress/progresswriter/printer.go

@@ -87,7 +87,7 @@ func NewPrinter(ctx context.Context, out console.File, mode string) (Writer, err
 
 	go func() {
 		// not using shared context to not disrupt display but let is finish reporting errors
-		pw.err = progressui.DisplaySolveStatus(ctx, "", c, out, statusCh)
+		_, pw.err = progressui.DisplaySolveStatus(ctx, "", c, out, statusCh)
 		close(doneCh)
 	}()
 	return pw, nil