func edgeKindLess(kind1, kind2 string) bool {
// General ordering:
// anchor edge kinds before non-anchor edge kinds
// forward edges before reverse edges
// edgeOrdering[i] (and variants) before edgeOrdering[i+1:]
// edge variants after root edge kind (ordered lexicographically)
// otherwise, order lexicographically
if kind1 == kind2 {
return false
} else if a1, a2 := edges.IsAnchorEdge(kind1), edges.IsAnchorEdge(kind2); a1 != a2 {
return a1
} else if d1, d2 := edges.IsForward(kind1), edges.IsForward(kind2); d1 != d2 {
return d1
}
kind1, kind2 = edges.Canonical(kind1), edges.Canonical(kind2)
for _, kind := range edgeOrdering {
if kind1 == kind {
return true
} else if kind2 == kind {
return false
} else if v1, v2 := edges.IsVariant(kind1, kind), edges.IsVariant(kind2, kind); v1 != v2 {
return v1
} else if v1 {
return kind1 < kind2
}
}
return kind1 < kind2
}
// CrossReferences implements part of the xrefs Service interface.
func (g *GraphStoreService) CrossReferences(ctx context.Context, req *xpb.CrossReferencesRequest) (*xpb.CrossReferencesReply, error) {
// TODO(zarko): Callgraph integration.
if len(req.Ticket) == 0 {
return nil, errors.New("no cross-references requested")
}
requestedPageSize := int(req.PageSize)
if requestedPageSize == 0 {
requestedPageSize = defaultXRefPageSize
}
eReply, err := g.Edges(ctx, &gpb.EdgesRequest{
Ticket: req.Ticket,
PageSize: int32(requestedPageSize),
PageToken: req.PageToken,
})
if err != nil {
return nil, fmt.Errorf("error getting edges for cross-references: %v", err)
}
reply := &xpb.CrossReferencesReply{
CrossReferences: make(map[string]*xpb.CrossReferencesReply_CrossReferenceSet),
NextPageToken: eReply.NextPageToken,
}
var allRelatedNodes stringset.Set
if len(req.Filter) > 0 {
reply.Nodes = make(map[string]*cpb.NodeInfo)
}
// Cache parent files across all anchors
files := make(map[string]*fileNode)
var totalXRefs int
for {
for source, es := range eReply.EdgeSets {
xr, ok := reply.CrossReferences[source]
if !ok {
xr = &xpb.CrossReferencesReply_CrossReferenceSet{Ticket: source}
}
var count int
for kind, grp := range es.Groups {
switch {
// TODO(schroeder): handle declarations
case xrefs.IsDefKind(req.DefinitionKind, kind, false):
anchors, err := completeAnchors(ctx, g, req.AnchorText, files, kind, edgeTickets(grp.Edge))
if err != nil {
return nil, fmt.Errorf("error resolving definition anchors: %v", err)
}
count += len(anchors)
xr.Definition = append(xr.Definition, anchors...)
case xrefs.IsRefKind(req.ReferenceKind, kind):
anchors, err := completeAnchors(ctx, g, req.AnchorText, files, kind, edgeTickets(grp.Edge))
if err != nil {
return nil, fmt.Errorf("error resolving reference anchors: %v", err)
}
count += len(anchors)
xr.Reference = append(xr.Reference, anchors...)
case xrefs.IsDocKind(req.DocumentationKind, kind):
anchors, err := completeAnchors(ctx, g, req.AnchorText, files, kind, edgeTickets(grp.Edge))
if err != nil {
return nil, fmt.Errorf("error resolving documentation anchors: %v", err)
}
count += len(anchors)
xr.Documentation = append(xr.Documentation, anchors...)
case !allRelatedNodes.Empty() && !edges.IsAnchorEdge(kind):
count += len(grp.Edge)
for _, edge := range grp.Edge {
xr.RelatedNode = append(xr.RelatedNode, &xpb.CrossReferencesReply_RelatedNode{
Ticket: edge.TargetTicket,
RelationKind: kind,
Ordinal: edge.Ordinal,
})
allRelatedNodes.Add(edge.TargetTicket)
}
}
}
if count > 0 {
reply.CrossReferences[xr.Ticket] = xr
totalXRefs += count
}
}
if reply.NextPageToken == "" || totalXRefs > 0 {
break
}
// We need to return at least 1 xref, if there are any
log.Println("Extra CrossReferences Edges call: ", reply.NextPageToken)
eReply, err = g.Edges(ctx, &gpb.EdgesRequest{
Ticket: req.Ticket,
PageSize: int32(requestedPageSize),
PageToken: reply.NextPageToken,
})
if err != nil {
return nil, fmt.Errorf("error getting edges for cross-references: %v", err)
}
reply.NextPageToken = eReply.NextPageToken
}
if !allRelatedNodes.Empty() {
nReply, err := g.Nodes(ctx, &gpb.NodesRequest{
Ticket: allRelatedNodes.Elements(),
Filter: req.Filter,
})
if err != nil {
return nil, fmt.Errorf("error retrieving related nodes: %v", err)
}
for ticket, n := range nReply.Nodes {
reply.Nodes[ticket] = n
}
}
return reply, nil
}
// CrossReferences implements part of the xrefs.Service interface.
func (t *Table) CrossReferences(ctx context.Context, req *xpb.CrossReferencesRequest) (*xpb.CrossReferencesReply, error) {
tickets, err := xrefs.FixTickets(req.Ticket)
if err != nil {
return nil, err
}
stats := refStats{
max: int(req.PageSize),
}
if stats.max < 0 {
return nil, fmt.Errorf("invalid page_size: %d", req.PageSize)
} else if stats.max == 0 {
stats.max = defaultPageSize
} else if stats.max > maxPageSize {
stats.max = maxPageSize
}
var edgesPageToken string
if req.PageToken != "" {
rec, err := base64.StdEncoding.DecodeString(req.PageToken)
if err != nil {
return nil, fmt.Errorf("invalid page_token: %q", req.PageToken)
}
var t ipb.PageToken
if err := proto.Unmarshal(rec, &t); err != nil || t.Index < 0 {
return nil, fmt.Errorf("invalid page_token: %q", req.PageToken)
}
stats.skip = int(t.Index)
edgesPageToken = t.SecondaryToken
}
pageToken := stats.skip
reply := &xpb.CrossReferencesReply{
CrossReferences: make(map[string]*xpb.CrossReferencesReply_CrossReferenceSet, len(req.Ticket)),
Nodes: make(map[string]*cpb.NodeInfo, len(req.Ticket)),
Total: &xpb.CrossReferencesReply_Total{},
}
var nextToken *ipb.PageToken
wantMoreCrossRefs := edgesPageToken == "" &&
(req.DefinitionKind != xpb.CrossReferencesRequest_NO_DEFINITIONS ||
req.DeclarationKind != xpb.CrossReferencesRequest_NO_DECLARATIONS ||
req.ReferenceKind != xpb.CrossReferencesRequest_NO_REFERENCES ||
req.DocumentationKind != xpb.CrossReferencesRequest_NO_DOCUMENTATION ||
req.CallerKind != xpb.CrossReferencesRequest_NO_CALLERS)
for _, ticket := range tickets {
// TODO(schroederc): retrieve PagedCrossReferences in parallel
cr, err := t.crossReferences(ctx, ticket)
if err == table.ErrNoSuchKey {
log.Println("Missing CrossReferences:", ticket)
continue
} else if err != nil {
return nil, fmt.Errorf("error looking up cross-references for ticket %q: %v", ticket, err)
}
crs := &xpb.CrossReferencesReply_CrossReferenceSet{
Ticket: ticket,
}
if req.ExperimentalSignatures {
crs.DisplayName, err = xrefs.SlowSignature(ctx, t, ticket)
if err != nil {
log.Printf("WARNING: error looking up signature for ticket %q: %v", ticket, err)
}
}
for _, grp := range cr.Group {
switch {
case xrefs.IsDefKind(req.DefinitionKind, grp.Kind, cr.Incomplete):
reply.Total.Definitions += int64(len(grp.Anchor))
if wantMoreCrossRefs {
stats.addAnchors(&crs.Definition, grp.Anchor, req.AnchorText)
}
case xrefs.IsDeclKind(req.DeclarationKind, grp.Kind, cr.Incomplete):
reply.Total.Declarations += int64(len(grp.Anchor))
if wantMoreCrossRefs {
stats.addAnchors(&crs.Declaration, grp.Anchor, req.AnchorText)
}
case xrefs.IsDocKind(req.DocumentationKind, grp.Kind):
reply.Total.Documentation += int64(len(grp.Anchor))
if wantMoreCrossRefs {
stats.addAnchors(&crs.Documentation, grp.Anchor, req.AnchorText)
}
case xrefs.IsRefKind(req.ReferenceKind, grp.Kind):
reply.Total.References += int64(len(grp.Anchor))
if wantMoreCrossRefs {
stats.addAnchors(&crs.Reference, grp.Anchor, req.AnchorText)
}
}
}
if wantMoreCrossRefs && req.CallerKind != xpb.CrossReferencesRequest_NO_CALLERS {
anchors, err := xrefs.SlowCallersForCrossReferences(ctx, t, req.CallerKind == xpb.CrossReferencesRequest_OVERRIDE_CALLERS, req.ExperimentalSignatures, ticket)
if err != nil {
return nil, fmt.Errorf("error in SlowCallersForCrossReferences: %v", err)
}
reply.Total.Callers += int64(len(anchors))
stats.addRelatedAnchors(&crs.Caller, anchors, req.AnchorText)
}
if wantMoreCrossRefs && req.DeclarationKind != xpb.CrossReferencesRequest_NO_DECLARATIONS {
decls, err := xrefs.SlowDeclarationsForCrossReferences(ctx, t, ticket)
if err != nil {
return nil, fmt.Errorf("error in SlowDeclarations: %v", err)
}
for _, decl := range decls {
if decl == ticket {
continue // Added in the original loop above.
}
cr, err := t.crossReferences(ctx, decl)
if err == table.ErrNoSuchKey {
log.Println("Missing CrossReferences:", decl)
continue
} else if err != nil {
return nil, fmt.Errorf("error looking up cross-references for ticket %q: %v", ticket, err)
}
for _, grp := range cr.Group {
if xrefs.IsDeclKind(req.DeclarationKind, grp.Kind, cr.Incomplete) {
reply.Total.Declarations += int64(len(grp.Anchor))
stats.addAnchors(&crs.Declaration, grp.Anchor, req.AnchorText)
}
}
}
}
for _, idx := range cr.PageIndex {
switch {
case xrefs.IsDefKind(req.DefinitionKind, idx.Kind, cr.Incomplete):
reply.Total.Definitions += int64(idx.Count)
if wantMoreCrossRefs && !stats.skipPage(idx) {
p, err := t.crossReferencesPage(ctx, idx.PageKey)
if err != nil {
return nil, fmt.Errorf("internal error: error retrieving cross-references page: %v", idx.PageKey)
}
stats.addAnchors(&crs.Definition, p.Group.Anchor, req.AnchorText)
}
case xrefs.IsDeclKind(req.DeclarationKind, idx.Kind, cr.Incomplete):
reply.Total.Declarations += int64(idx.Count)
if wantMoreCrossRefs && !stats.skipPage(idx) {
p, err := t.crossReferencesPage(ctx, idx.PageKey)
if err != nil {
return nil, fmt.Errorf("internal error: error retrieving cross-references page: %v", idx.PageKey)
}
stats.addAnchors(&crs.Declaration, p.Group.Anchor, req.AnchorText)
}
case xrefs.IsDocKind(req.DocumentationKind, idx.Kind):
reply.Total.Documentation += int64(idx.Count)
if wantMoreCrossRefs && !stats.skipPage(idx) {
p, err := t.crossReferencesPage(ctx, idx.PageKey)
if err != nil {
return nil, fmt.Errorf("internal error: error retrieving cross-references page: %v", idx.PageKey)
}
stats.addAnchors(&crs.Documentation, p.Group.Anchor, req.AnchorText)
}
case xrefs.IsRefKind(req.ReferenceKind, idx.Kind):
reply.Total.References += int64(idx.Count)
if wantMoreCrossRefs && !stats.skipPage(idx) {
p, err := t.crossReferencesPage(ctx, idx.PageKey)
if err != nil {
return nil, fmt.Errorf("internal error: error retrieving cross-references page: %v", idx.PageKey)
}
stats.addAnchors(&crs.Reference, p.Group.Anchor, req.AnchorText)
}
}
}
if len(crs.Declaration) > 0 || len(crs.Definition) > 0 || len(crs.Reference) > 0 || len(crs.Documentation) > 0 || len(crs.Caller) > 0 {
reply.CrossReferences[crs.Ticket] = crs
}
}
if pageToken+stats.total != sumTotalCrossRefs(reply.Total) && stats.total != 0 {
nextToken = &ipb.PageToken{Index: int32(pageToken + stats.total)}
}
if len(req.Filter) > 0 {
er, err := t.edges(ctx, edgesRequest{
Tickets: tickets,
Filters: req.Filter,
Kinds: func(kind string) bool { return !edges.IsAnchorEdge(kind) },
PageToken: edgesPageToken,
TotalOnly: (stats.max <= stats.total),
PageSize: stats.max - stats.total,
})
if err != nil {
return nil, fmt.Errorf("error getting related nodes: %v", err)
}
reply.Total.RelatedNodesByRelation = er.TotalEdgesByKind
for ticket, es := range er.EdgeSets {
var nodes stringset.Set
crs, ok := reply.CrossReferences[ticket]
if !ok {
crs = &xpb.CrossReferencesReply_CrossReferenceSet{
Ticket: ticket,
}
}
for kind, g := range es.Groups {
for _, edge := range g.Edge {
nodes.Add(edge.TargetTicket)
crs.RelatedNode = append(crs.RelatedNode, &xpb.CrossReferencesReply_RelatedNode{
RelationKind: kind,
Ticket: edge.TargetTicket,
Ordinal: edge.Ordinal,
})
}
}
if len(nodes) > 0 {
for ticket, n := range er.Nodes {
if nodes.Contains(ticket) {
reply.Nodes[ticket] = n
}
}
}
if !ok && len(crs.RelatedNode) > 0 {
reply.CrossReferences[ticket] = crs
}
}
if er.NextPageToken != "" {
nextToken = &ipb.PageToken{SecondaryToken: er.NextPageToken}
}
}
if nextToken != nil {
rec, err := proto.Marshal(nextToken)
if err != nil {
return nil, fmt.Errorf("internal error: error marshalling page token: %v", err)
}
reply.NextPageToken = base64.StdEncoding.EncodeToString(rec)
}
if req.NodeDefinitions {
nodeTickets := make([]string, 0, len(reply.Nodes))
for ticket := range reply.Nodes {
nodeTickets = append(nodeTickets, ticket)
}
// TODO(schroederc): cache this in the serving data
defs, err := xrefs.SlowDefinitions(ctx, t, nodeTickets)
if err != nil {
return nil, fmt.Errorf("error retrieving node definitions: %v", err)
}
reply.DefinitionLocations = make(map[string]*xpb.Anchor, len(defs))
for ticket, def := range defs {
node, ok := reply.Nodes[ticket]
if !ok {
panic(fmt.Sprintf("extra definition returned for unknown node %q: %v", ticket, def))
}
node.Definition = def.Ticket
if _, ok := reply.DefinitionLocations[def.Ticket]; !ok {
reply.DefinitionLocations[def.Ticket] = def
}
}
}
return reply, nil
}
// CrossReferences implements part of the xrefs.Interface.
func (d *DB) CrossReferences(ctx context.Context, req *xpb.CrossReferencesRequest) (*xpb.CrossReferencesReply, error) {
// TODO(zarko): Callgraph integration.
tickets, err := xrefs.FixTickets(req.Ticket)
if err != nil {
return nil, err
}
pageSize := int(req.PageSize)
if pageSize <= 0 {
pageSize = defaultPageSize
} else if pageSize > maxPageSize {
pageSize = maxPageSize
}
var pageOffset int
var edgesToken string
if req.PageToken != "" {
rec, err := base64.StdEncoding.DecodeString(req.PageToken)
if err != nil {
return nil, fmt.Errorf("invalid page_token: %q", req.PageToken)
}
var t ipb.PageToken
if err := proto.Unmarshal(rec, &t); err != nil || t.Index < 0 {
return nil, fmt.Errorf("invalid page_token: %q", req.PageToken)
}
pageOffset = int(t.Index)
edgesToken = t.SecondaryToken
}
reply := &xpb.CrossReferencesReply{
CrossReferences: make(map[string]*xpb.CrossReferencesReply_CrossReferenceSet),
Nodes: make(map[string]*cpb.NodeInfo),
}
setQ, ticketArgs := sqlSetQuery(1, tickets)
var count int
if edgesToken == "" {
args := append(ticketArgs, pageSize+1, pageOffset) // +1 to check for next page
rs, err := d.Query(fmt.Sprintf("SELECT ticket, kind, proto FROM CrossReferences WHERE ticket IN %s ORDER BY ticket LIMIT $%d OFFSET $%d;", setQ, len(tickets)+1, len(tickets)+2), args...)
if err != nil {
return nil, err
}
defer closeRows(rs)
var xrs *xpb.CrossReferencesReply_CrossReferenceSet
for rs.Next() {
count++
if count > pageSize {
continue
}
var ticket, kind string
var rec []byte
if err := rs.Scan(&ticket, &kind, &rec); err != nil {
return nil, err
}
if xrs != nil && xrs.Ticket != ticket {
if len(xrs.Definition) > 0 || len(xrs.Documentation) > 0 || len(xrs.Reference) > 0 || len(xrs.RelatedNode) > 0 {
reply.CrossReferences[xrs.Ticket] = xrs
}
xrs = nil
}
if xrs == nil {
xrs = &xpb.CrossReferencesReply_CrossReferenceSet{Ticket: ticket}
}
switch {
// TODO(schroederc): handle declarations
case xrefs.IsDefKind(req.DefinitionKind, kind, false):
xrs.Definition, err = addRelatedAnchor(xrs.Definition, rec, req.AnchorText)
if err != nil {
return nil, err
}
case xrefs.IsDocKind(req.DocumentationKind, kind):
xrs.Documentation, err = addRelatedAnchor(xrs.Documentation, rec, req.AnchorText)
if err != nil {
return nil, err
}
case xrefs.IsRefKind(req.ReferenceKind, kind):
xrs.Reference, err = addRelatedAnchor(xrs.Reference, rec, req.AnchorText)
if err != nil {
return nil, err
}
}
}
if xrs != nil && (len(xrs.Definition) > 0 || len(xrs.Documentation) > 0 || len(xrs.Reference) > 0 || len(xrs.RelatedNode) > 0) {
reply.CrossReferences[xrs.Ticket] = xrs
}
if count > pageSize {
rec, err := proto.Marshal(&ipb.PageToken{Index: int32(pageOffset + pageSize)})
if err != nil {
return nil, fmt.Errorf("internal error: error marshalling page token: %v", err)
}
reply.NextPageToken = base64.StdEncoding.EncodeToString(rec)
}
}
if len(req.Filter) > 0 && count <= pageSize {
// TODO(schroederc): consolidate w/ LevelDB implementation
er, err := d.edges(ctx, &gpb.EdgesRequest{
Ticket: tickets,
Filter: req.Filter,
PageSize: int32(pageSize - count),
PageToken: edgesToken,
}, func(kind string) bool {
return !edges.IsAnchorEdge(kind)
})
if err != nil {
return nil, fmt.Errorf("error getting related nodes: %v", err)
}
for ticket, es := range er.EdgeSets {
var nodes stringset.Set
crs, ok := reply.CrossReferences[ticket]
if !ok {
crs = &xpb.CrossReferencesReply_CrossReferenceSet{
Ticket: ticket,
}
}
for kind, g := range es.Groups {
if !edges.IsAnchorEdge(kind) {
for _, edge := range g.Edge {
nodes.Add(edge.TargetTicket)
crs.RelatedNode = append(crs.RelatedNode, &xpb.CrossReferencesReply_RelatedNode{
RelationKind: kind,
Ticket: edge.TargetTicket,
Ordinal: edge.Ordinal,
})
}
}
}
if len(nodes) > 0 {
for ticket, n := range er.Nodes {
if nodes.Contains(ticket) {
reply.Nodes[ticket] = n
}
}
}
if !ok && len(crs.RelatedNode) > 0 {
reply.CrossReferences[ticket] = crs
}
}
if er.NextPageToken != "" {
rec, err := proto.Marshal(&ipb.PageToken{SecondaryToken: er.NextPageToken})
if err != nil {
return nil, fmt.Errorf("internal error: error marshalling page token: %v", err)
}
reply.NextPageToken = base64.StdEncoding.EncodeToString(rec)
}
}
return reply, nil
}