Exemplo n.º 1
0
Arquivo: xrefs.go Projeto: bzz/kythe
// Nodes implements part of the Service interface.
func (g *GraphStoreService) Nodes(ctx context.Context, req *xpb.NodesRequest) (*xpb.NodesReply, error) {
	patterns := xrefs.ConvertFilters(req.Filter)

	var names []*spb.VName
	for _, ticket := range req.Ticket {
		name, err := kytheuri.ToVName(ticket)
		if err != nil {
			return nil, err
		}
		names = append(names, name)
	}
	nodes := make(map[string]*xpb.NodeInfo)
	for i, vname := range names {
		ticket := req.Ticket[i]
		info := &xpb.NodeInfo{Facts: make(map[string][]byte)}
		if err := g.gs.Read(ctx, &spb.ReadRequest{Source: vname}, func(entry *spb.Entry) error {
			if len(patterns) == 0 || xrefs.MatchesAny(entry.FactName, patterns) {
				info.Facts[entry.FactName] = entry.FactValue
			}
			return nil
		}); err != nil {
			return nil, err
		}
		if len(info.Facts) > 0 {
			nodes[ticket] = info
		}
	}
	return &xpb.NodesReply{Nodes: nodes}, nil
}
Exemplo n.º 2
0
// Nodes implements part of the Service interface.
func (g *GraphStoreService) Nodes(ctx context.Context, req *xpb.NodesRequest) (*xpb.NodesReply, error) {
	patterns := xrefs.ConvertFilters(req.Filter)

	var names []*spb.VName
	for _, ticket := range req.Ticket {
		name, err := kytheuri.ToVName(ticket)
		if err != nil {
			return nil, err
		}
		names = append(names, name)
	}
	var nodes []*xpb.NodeInfo
	for i, vname := range names {
		info := &xpb.NodeInfo{Ticket: req.Ticket[i]}
		if err := g.gs.Read(ctx, &spb.ReadRequest{Source: vname}, func(entry *spb.Entry) error {
			if len(patterns) == 0 || xrefs.MatchesAny(entry.FactName, patterns) {
				info.Fact = append(info.Fact, entryToFact(entry))
			}
			return nil
		}); err != nil {
			return nil, err
		}
		if len(info.Fact) > 0 {
			nodes = append(nodes, info)
		}
	}
	return &xpb.NodesReply{Node: nodes}, nil
}
Exemplo n.º 3
0
func readEntries(ctx context.Context, gs graphstore.Service, entryFunc graphstore.EntryFunc, edgeKind string, tickets []string) error {
	for _, ticket := range tickets {
		src, err := kytheuri.ToVName(ticket)
		if err != nil {
			return fmt.Errorf("error parsing ticket %q: %v", ticket, err)
		}
		if err := gs.Read(ctx, &spb.ReadRequest{
			Source:   src,
			EdgeKind: edgeKind,
		}, entryFunc); err != nil {
			return fmt.Errorf("GraphStore Read error for ticket %q: %v", ticket, err)
		}
	}
	return nil
}
Exemplo n.º 4
0
func scanEntries(ctx context.Context, gs graphstore.Service, entryFunc graphstore.EntryFunc, edgeKind, targetTicket, factPrefix string) error {
	var target *spb.VName
	var err error
	if targetTicket != "" {
		target, err = kytheuri.ToVName(targetTicket)
		if err != nil {
			return fmt.Errorf("error parsing --target %q: %v", targetTicket, err)
		}
	}
	if err := gs.Scan(ctx, &spb.ScanRequest{
		EdgeKind:   edgeKind,
		FactPrefix: factPrefix,
		Target:     target,
	}, entryFunc); err != nil {
		return fmt.Errorf("GraphStore Scan error: %v", err)
	}
	return nil
}
Exemplo n.º 5
0
Arquivo: xrefs.go Projeto: bzz/kythe
// Decorations implements part of the Service interface.
func (g *GraphStoreService) Decorations(ctx context.Context, req *xpb.DecorationsRequest) (*xpb.DecorationsReply, error) {
	if len(req.DirtyBuffer) > 0 {
		return nil, errors.New("UNIMPLEMENTED: dirty buffers")
	} else if req.GetLocation() == nil {
		// TODO(schroederc): allow empty location when given dirty buffer
		return nil, errors.New("missing location")
	}

	fileVName, err := kytheuri.ToVName(req.Location.Ticket)
	if err != nil {
		return nil, fmt.Errorf("invalid file ticket %q: %v", req.Location.Ticket, err)
	}

	text, encoding, err := getSourceText(ctx, g.gs, fileVName)
	if err != nil {
		return nil, fmt.Errorf("failed to retrieve file text: %v", err)
	}
	norm := xrefs.NewNormalizer(text)

	loc, err := norm.Location(req.GetLocation())
	if err != nil {
		return nil, err
	}

	reply := &xpb.DecorationsReply{
		Location: loc,
		Nodes:    make(map[string]*xpb.NodeInfo),
	}

	// Handle DecorationsRequest.SourceText switch
	if req.SourceText {
		if loc.Kind == xpb.Location_FILE {
			reply.SourceText = text
		} else {
			reply.SourceText = text[loc.Start.ByteOffset:loc.End.ByteOffset]
		}
		reply.Encoding = encoding
	}

	// Handle DecorationsRequest.References switch
	if req.References {
		// Traverse the following chain of edges:
		//   file --%/kythe/edge/childof-> []anchor --forwardEdgeKind-> []target
		//
		// Add []anchor and []target nodes to reply.Nodes
		// Add all {anchor, forwardEdgeKind, target} tuples to reply.Reference

		patterns := xrefs.ConvertFilters(req.Filter)

		children, err := getEdges(ctx, g.gs, fileVName, func(e *spb.Entry) bool {
			return e.EdgeKind == revChildOfEdgeKind
		})
		if err != nil {
			return nil, fmt.Errorf("failed to retrieve file children: %v", err)
		}

		targetSet := stringset.New()
		for _, edge := range children {
			anchor := edge.Target
			ticket := kytheuri.ToString(anchor)
			anchorNodeReply, err := g.Nodes(ctx, &xpb.NodesRequest{
				Ticket: []string{ticket},
			})
			if err != nil {
				return nil, fmt.Errorf("failure getting reference source node: %v", err)
			} else if len(anchorNodeReply.Nodes) != 1 {
				return nil, fmt.Errorf("found %d nodes for {%+v}", len(anchorNodeReply.Nodes), anchor)
			}

			node, ok := xrefs.NodesMap(anchorNodeReply.Nodes)[ticket]
			if !ok {
				return nil, fmt.Errorf("failed to find info for node %q", ticket)
			} else if string(node[schema.NodeKindFact]) != schema.AnchorKind {
				// Skip child if it isn't an anchor node
				continue
			}

			anchorStart, err := strconv.Atoi(string(node[schema.AnchorStartFact]))
			if err != nil {
				log.Printf("Invalid anchor start offset %q for node %q: %v", node[schema.AnchorStartFact], ticket, err)
				continue
			}
			anchorEnd, err := strconv.Atoi(string(node[schema.AnchorEndFact]))
			if err != nil {
				log.Printf("Invalid anchor end offset %q for node %q: %v", node[schema.AnchorEndFact], ticket, err)
				continue
			}

			if loc.Kind == xpb.Location_SPAN {
				// Check if anchor fits within/around requested source text window
				if !xrefs.InSpanBounds(req.SpanKind, int32(anchorStart), int32(anchorEnd), loc.Start.ByteOffset, loc.End.ByteOffset) {
					continue
				} else if anchorStart > anchorEnd {
					log.Printf("Invalid anchor offset span %d:%d", anchorStart, anchorEnd)
					continue
				}
			}

			targets, err := getEdges(ctx, g.gs, anchor, func(e *spb.Entry) bool {
				return schema.EdgeDirection(e.EdgeKind) == schema.Forward && e.EdgeKind != schema.ChildOfEdge
			})
			if err != nil {
				return nil, fmt.Errorf("failed to retrieve targets of anchor %v: %v", anchor, err)
			}
			if len(targets) == 0 {
				log.Printf("Anchor missing forward edges: {%+v}", anchor)
				continue
			}

			if node := filterNode(patterns, anchorNodeReply.Nodes[ticket]); node != nil {
				reply.Nodes[ticket] = node
			}
			for _, edge := range targets {
				targetTicket := kytheuri.ToString(edge.Target)
				targetSet.Add(targetTicket)
				reply.Reference = append(reply.Reference, &xpb.DecorationsReply_Reference{
					SourceTicket: ticket,
					Kind:         edge.Kind,
					TargetTicket: targetTicket,
					AnchorStart:  norm.ByteOffset(int32(anchorStart)),
					AnchorEnd:    norm.ByteOffset(int32(anchorEnd)),
				})
			}
		}
		sort.Sort(bySpan(reply.Reference))

		// Only request Nodes when there are fact filters given.
		if len(req.Filter) > 0 {
			// Ensure returned nodes are not duplicated.
			for ticket := range reply.Nodes {
				targetSet.Remove(ticket)
			}

			// Batch request all Reference target nodes
			nodesReply, err := g.Nodes(ctx, &xpb.NodesRequest{
				Ticket: targetSet.Slice(),
				Filter: req.Filter,
			})
			if err != nil {
				return nil, fmt.Errorf("failure getting reference target nodes: %v", err)
			}
			for ticket, node := range nodesReply.Nodes {
				reply.Nodes[ticket] = node
			}
		}
	}

	return reply, nil
}
Exemplo n.º 6
0
Arquivo: xrefs.go Projeto: bzz/kythe
// Edges implements part of the Service interface.
func (g *GraphStoreService) Edges(ctx context.Context, req *xpb.EdgesRequest) (*xpb.EdgesReply, error) {
	if len(req.Ticket) == 0 {
		return nil, errors.New("no tickets specified")
	} else if req.PageToken != "" {
		return nil, errors.New("UNIMPLEMENTED: page_token")
	}

	patterns := xrefs.ConvertFilters(req.Filter)
	allowedKinds := stringset.New(req.Kind...)
	targetSet := stringset.New()
	reply := &xpb.EdgesReply{
		EdgeSets: make(map[string]*xpb.EdgeSet),
		Nodes:    make(map[string]*xpb.NodeInfo),
	}

	for _, ticket := range req.Ticket {
		vname, err := kytheuri.ToVName(ticket)
		if err != nil {
			return nil, fmt.Errorf("invalid ticket %q: %v", ticket, err)
		}

		var (
			// EdgeKind -> TargetTicket -> OrdinalSet
			filteredEdges = make(map[string]map[string]map[int32]struct{})
			filteredFacts = make(map[string][]byte)
		)

		if err := g.gs.Read(ctx, &spb.ReadRequest{
			Source:   vname,
			EdgeKind: "*",
		}, func(entry *spb.Entry) error {
			edgeKind := entry.EdgeKind
			if edgeKind == "" {
				// node fact
				if len(patterns) > 0 && xrefs.MatchesAny(entry.FactName, patterns) {
					filteredFacts[entry.FactName] = entry.FactValue
				}
			} else {
				// edge
				edgeKind, ordinal, _ := schema.ParseOrdinal(edgeKind)
				if len(req.Kind) == 0 || allowedKinds.Contains(edgeKind) {
					targets, ok := filteredEdges[edgeKind]
					if !ok {
						targets = make(map[string]map[int32]struct{})
						filteredEdges[edgeKind] = targets
					}
					ticket := kytheuri.ToString(entry.Target)
					ordSet, ok := targets[ticket]
					if !ok {
						ordSet = make(map[int32]struct{})
						targets[ticket] = ordSet
					}
					ordSet[int32(ordinal)] = struct{}{}
				}
			}
			return nil
		}); err != nil {
			return nil, fmt.Errorf("failed to retrieve entries for ticket %q", ticket)
		}

		// Only add a EdgeSet if there are targets for the requested edge kinds.
		if len(filteredEdges) > 0 {
			groups := make(map[string]*xpb.EdgeSet_Group)
			for edgeKind, targets := range filteredEdges {
				g := &xpb.EdgeSet_Group{}
				for target, ordinals := range targets {
					for ordinal := range ordinals {
						g.Edge = append(g.Edge, &xpb.EdgeSet_Group_Edge{
							TargetTicket: target,
							Ordinal:      ordinal,
						})
					}
					targetSet.Add(target)
				}
				groups[edgeKind] = g
			}
			reply.EdgeSets[ticket] = &xpb.EdgeSet{
				Groups: groups,
			}

			// In addition, only add a NodeInfo if the filters have resulting facts.
			if len(filteredFacts) > 0 {
				reply.Nodes[ticket] = &xpb.NodeInfo{
					Facts: filteredFacts,
				}
			}
		}
	}

	// Only request Nodes when there are fact filters given.
	if len(req.Filter) > 0 {
		// Eliminate redundant work by removing already requested nodes from targetSet
		for ticket := range reply.Nodes {
			targetSet.Remove(ticket)
		}

		// Batch request all leftover target nodes
		nodesReply, err := g.Nodes(ctx, &xpb.NodesRequest{
			Ticket: targetSet.Slice(),
			Filter: req.Filter,
		})
		if err != nil {
			return nil, fmt.Errorf("failure getting target nodes: %v", err)
		}
		for ticket, node := range nodesReply.Nodes {
			reply.Nodes[ticket] = node
		}
	}

	return reply, nil
}
Exemplo n.º 7
0
// Edges implements part of the Service interface.
func (g *GraphStoreService) Edges(ctx context.Context, req *xpb.EdgesRequest) (*xpb.EdgesReply, error) {
	if len(req.Ticket) == 0 {
		return nil, errors.New("no tickets specified")
	} else if req.PageToken != "" {
		return nil, errors.New("UNIMPLEMENTED: page_token")
	}

	patterns := xrefs.ConvertFilters(req.Filter)
	allowedKinds := stringset.New(req.Kind...)
	targetSet := stringset.New()
	reply := new(xpb.EdgesReply)

	for _, ticket := range req.Ticket {
		vname, err := kytheuri.ToVName(ticket)
		if err != nil {
			return nil, fmt.Errorf("invalid ticket %q: %v", ticket, err)
		}

		var (
			// EdgeKind -> StringSet<TargetTicket>
			filteredEdges = make(map[string]stringset.Set)
			filteredFacts []*xpb.Fact
		)

		if err := g.gs.Read(ctx, &spb.ReadRequest{
			Source:   vname,
			EdgeKind: "*",
		}, func(entry *spb.Entry) error {
			edgeKind := entry.EdgeKind
			if edgeKind == "" {
				// node fact
				if len(patterns) > 0 && xrefs.MatchesAny(entry.FactName, patterns) {
					filteredFacts = append(filteredFacts, entryToFact(entry))
				}
			} else {
				// edge
				if len(req.Kind) == 0 || allowedKinds.Contains(edgeKind) {
					targets := filteredEdges[edgeKind]
					if targets == nil {
						targets = stringset.New()
						filteredEdges[edgeKind] = targets
					}
					targets.Add(kytheuri.ToString(entry.Target))
				}
			}
			return nil
		}); err != nil {
			return nil, fmt.Errorf("failed to retrieve entries for ticket %q", ticket)
		}

		// Only add a EdgeSet if there are targets for the requested edge kinds.
		if len(filteredEdges) > 0 {
			var groups []*xpb.EdgeSet_Group
			for edgeKind, targets := range filteredEdges {
				g := &xpb.EdgeSet_Group{Kind: edgeKind}
				for target := range targets {
					g.TargetTicket = append(g.TargetTicket, target)
					targetSet.Add(target)
				}
				groups = append(groups, g)
			}
			reply.EdgeSet = append(reply.EdgeSet, &xpb.EdgeSet{
				SourceTicket: ticket,
				Group:        groups,
			})

			// In addition, only add a NodeInfo if the filters have resulting facts.
			if len(filteredFacts) > 0 {
				reply.Node = append(reply.Node, &xpb.NodeInfo{
					Ticket: ticket,
					Fact:   filteredFacts,
				})
			}
		}
	}

	// Only request Nodes when there are fact filters given.
	if len(req.Filter) > 0 {
		// Ensure reply.Node is a unique set by removing already requested nodes from targetSet
		for _, n := range reply.Node {
			targetSet.Remove(n.Ticket)
		}

		// Batch request all leftover target nodes
		nodesReply, err := g.Nodes(ctx, &xpb.NodesRequest{
			Ticket: targetSet.Slice(),
			Filter: req.Filter,
		})
		if err != nil {
			return nil, fmt.Errorf("failure getting target nodes: %v", err)
		}
		reply.Node = append(reply.Node, nodesReply.Node...)
	}

	return reply, nil
}