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visitor.go
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visitor.go
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package docs
import (
"sort"
"google.golang.org/protobuf/compiler/protogen"
"google.golang.org/protobuf/reflect/protoreflect"
)
type visitor struct {
seen map[string]struct{}
refs map[string][]string
}
func newVisitor() *visitor {
return &visitor{
seen: make(map[string]struct{}),
refs: make(map[string][]string),
}
}
func (v *visitor) walk(p *protogen.Plugin) map[string][]string {
for _, f := range p.Files {
for _, svc := range f.Services {
for _, m := range svc.Methods {
for _, msg := range []*protogen.Message{m.Input, m.Output} {
v.walkMessage(msg)
}
}
}
}
for pkg, refs := range v.refs {
sort.Strings(refs)
v.refs[pkg] = refs
}
return v.refs
}
func (v *visitor) walkMessage(msg *protogen.Message) {
if !notEmpty(msg) {
return
}
if _, ok := v.seen[string(msg.Desc.FullName())]; ok {
return
}
pkgName := string(msg.Desc.ParentFile().Package())
if _, ok := v.refs[pkgName]; !ok {
v.refs[pkgName] = []string{}
}
v.refs[pkgName] = append(v.refs[pkgName], string(msg.Desc.FullName()))
v.seen[string(msg.Desc.FullName())] = struct{}{}
for _, field := range msg.Fields {
switch field.Desc.Kind() {
case protoreflect.EnumKind:
if _, ok := v.seen[string(field.Enum.Desc.FullName())]; !ok {
v.seen[string(field.Enum.Desc.FullName())] = struct{}{}
enumPkgName := field.Enum.Desc.ParentFile().Package()
if _, ok := v.refs[string(enumPkgName)]; !ok {
v.refs[string(enumPkgName)] = []string{}
}
v.refs[string(enumPkgName)] = append(v.refs[string(enumPkgName)], string(field.Enum.Desc.FullName()))
}
case protoreflect.MessageKind:
v.walkMessage(field.Message)
}
}
}