Response to changes requested

Added GetGraphVisualizationFile function in the entire pipeline of Gapid.

cmd/gapit/create_graph_visualization.go

@@ -19,7 +19,6 @@ import (
 	"flag"
 	"github.com/google/gapid/core/app"
 	"github.com/google/gapid/core/log"
-	"io/ioutil"
 	"os"
 )
 
@@ -50,25 +49,23 @@ func (verb *createGraphVisualizationVerb) Run(ctx context.Context, flags flag.Fl
 
 	graphVisualization, err := client.GetGraphVisualization(ctx, capture)
 	if err != nil {
-		return log.Errf(ctx, err, "ExportCapture(%v)", capture)
+		return log.Errf(ctx, err, "GetGraphVisualization(%v)", capture)
 	}
 
 	filePath := verb.Out
 	if filePath == "" {
 		filePath = "graph_visualization.dot"
 	}
 
-	_, err = os.Stat(filePath)
-	if os.IsNotExist(err) {
-		file, err := os.Create(filePath)
-		if err != nil {
-			log.Errf(ctx, err, "Creating file (%v)", filePath)
-		}
-		defer file.Close()
+	file, err := os.Create(filePath)
+	if err != nil {
+		return log.Errf(ctx, err, "Creating file (%v)", filePath)
 	}
+	defer file.Close()
 
-	if err := ioutil.WriteFile(filePath, []byte(graphVisualization), 0666); err != nil {
-		return log.Errf(ctx, err, "Writing file: %v", filePath)
+	bytesWritten, err := file.Write(graphVisualization)
+	if err != nil {
+		return log.Errf(ctx, err, "Error after writing %d bytes to file", bytesWritten)
 	}
 	return nil
 }

gapis/client/client.go

@@ -485,15 +485,15 @@ func (c *client) GetTimestamps(ctx context.Context, capture *path.Capture, devic
 	return res, nil
 }
 
-func (c *client) GetGraphVisualization(ctx context.Context, capture *path.Capture) (string, error) {
+func (c *client) GetGraphVisualization(ctx context.Context, capture *path.Capture) ([]byte, error) {
 	res, err := c.client.GetGraphVisualization(ctx, &service.GraphVisualizationRequest{
 		Capture: capture,
 	})
 	if err != nil {
-		return "", err
+		return []byte{}, err
 	}
 	if err := res.GetError(); err != nil {
-		return "", err.Get()
+		return []byte{}, err.Get()
 	}
 	return res.GetGraphVisualization(), nil
 }

gapis/resolve/dependencygraph2/graph_visualization/graph_visualization.go

@@ -22,11 +22,11 @@ import (
 	"github.com/google/gapid/gapis/resolve/dependencygraph2"
 )
 
-func GetGraphVisualizationFromCapture(ctx context.Context, p *capture.Capture) (string, error) {
+func GetGraphVisualizationFromCapture(ctx context.Context, p *capture.Capture) ([]byte, error) {
 
 	config := dependencygraph2.DependencyGraphConfig{}
 	dependencyGraph, err := dependencygraph2.BuildDependencyGraph(ctx, config, p, []api.Cmd{}, interval.U64RangeList{})
 	_ = dependencyGraph
 
-	return "OutputFile", err
+	return []byte("OutputFile"), err
 }

gapis/server/server.go

@@ -63,6 +63,10 @@ import (
 	_ "github.com/google/gapid/gapis/api/all"
 )
 
+const (
+	FILE_SIZE_LIMIT_IN_BYTES = 2147483647
+)
+
 // Config holds the server configuration settings.
 type Config struct {
 	Info             *service.ServerInfo
@@ -299,17 +303,20 @@ func (s *server) DCECapture(ctx context.Context, p *path.Capture, requested []*p
 	return trimmed, nil
 }
 
-func (s *server) GetGraphVisualization(ctx context.Context, p *path.Capture) (string, error) {
+func (s *server) GetGraphVisualization(ctx context.Context, p *path.Capture) ([]byte, error) {
 	ctx = status.Start(ctx, "RPC GetGraphVisualization")
 	defer status.Finish(ctx)
 	ctx = log.Enter(ctx, "GetGraphVisualization")
 	c, err := capture.ResolveFromPath(ctx, p)
 	if err != nil {
-		return "", err
+		return []byte{}, err
 	}
 	graphVisualization, err := graph_visualization.GetGraphVisualizationFromCapture(ctx, c)
 	if err != nil {
-		return "", err
+		return []byte{}, err
+	}
+	if len(graphVisualization) > FILE_SIZE_LIMIT_IN_BYTES {
+		return []byte{}, log.Errf(ctx, err, "The file size for graph visualization exceeds %d bytes", FILE_SIZE_LIMIT_IN_BYTES)
 	}
 	return graphVisualization, nil
 }

gapis/service/service.go

@@ -84,7 +84,7 @@ type Service interface {
 	// DCECapture returns a new capture containing only the requested commands and their dependencies.
 	DCECapture(ctx context.Context, capture *path.Capture, commands []*path.Command) (*path.Capture, error)
 
-	GetGraphVisualization(ctx context.Context, capture *path.Capture) (string, error)
+	GetGraphVisualization(ctx context.Context, capture *path.Capture) ([]byte, error)
 
 	// GetDevices returns the full list of replay devices avaliable to the server.
 	// These include local replay devices and any connected Android devices.

gapis/service/service.proto

@@ -321,7 +321,7 @@ message GraphVisualizationRequest {
 }
 message GraphVisualizationResponse {
   oneof res {
-    string graphVisualization = 1;
+    bytes graphVisualization = 1;
     Error error = 2;
   }
 }