/
proto.go
371 lines (335 loc) · 9.43 KB
/
proto.go
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// Copyright 2019, 2021 Tamás Gulácsi
//
// SPDX-License-Identifier: Apache-2.0
package oracall
import (
"bytes"
"errors"
"fmt"
"io"
"strconv"
"strings"
fstructs "github.com/fatih/structs"
)
var SkipMissingTableOf = true
var Gogo bool
var NumberAsString bool
//go:generate sh ./download-protoc.sh
//go:generate go install github.com/golang/protobuf/protoc-gen-go@latest
// go:generate go get -u github.com/gogo/protobuf/protoc-gen-gogofast
// go:generate go get -u google.golang.org/grpc/cmd/protoc-gen-go-grpc
//go:generate go install github.com/planetscale/vtprotobuf/cmd/protoc-gen-go-vtproto@latest
// build: protoc --go_out=. --go-grpc_out=. my.proto
func SaveProtobuf(dst io.Writer, functions []Function, pkg, path string) error {
var err error
w := errWriter{Writer: dst, err: &err}
io.WriteString(w, `syntax = "proto3";`+"\n\n")
if pkg != "" {
fmt.Fprintf(w, `package %s;
option go_package = %q;`, pkg, path)
}
io.WriteString(w, `
import "google/protobuf/timestamp.proto";
`)
for _, fun := range functions {
if len(fun.Tag) != 0 {
io.WriteString(w, `
import "github.com/tgulacsi/oracall/orasrv/tag.proto";
`)
break
}
}
if Gogo {
io.WriteString(w, "\nimport \"github.com/gogo/protobuf/gogoproto/gogo.proto\";\n")
}
seen := make(map[string]struct{}, 16)
services := make([]string, 0, len(functions))
var tags strings.Builder
FunLoop:
for _, fun := range functions {
//b, _ := json.Marshal(struct{Name, Documentation string}{Name:fun.Name(), Documentation:fun.Documentation})
//fmt.Println(string(b))
fName := fun.name
if fun.alias != "" {
fName = fun.alias
}
fName = strings.ToLower(fName)
if err := fun.SaveProtobuf(w, seen); err != nil {
if SkipMissingTableOf && (errors.Is(err, ErrMissingTableOf) ||
errors.Is(err, ErrUnknownSimpleType)) {
logger.Info("SKIP function, missing TableOf info", "function", fName)
continue FunLoop
}
return fmt.Errorf("%s: %w", fun.name, err)
}
var streamQual string
if fun.HasCursorOut() {
streamQual = "stream "
}
name := CamelCase(dot2D.Replace(fName))
var comment string
if fun.Documentation != "" {
comment = asComment(fun.Documentation, "")
}
if len(fun.Tag) != 0 {
tags.WriteString("\n")
for _, t := range fun.Tag {
fmt.Fprintf(&tags, "\toption (oracall.orasrv.tag) = %q;\n", t)
}
}
services = append(services,
fmt.Sprintf(`%srpc %s (%s) returns (%s%s) {%s}`,
comment,
name,
CamelCase(fun.getStructName(false, false)),
streamQual,
CamelCase(fun.getStructName(true, false)),
tags.String(),
),
)
}
fmt.Fprintf(w, "\nservice %s {\n", CamelCase(pkg))
for _, s := range services {
fmt.Fprintf(w, "\t%s\n", s)
}
w.Write([]byte("}"))
return nil
}
func (f Function) SaveProtobuf(dst io.Writer, seen map[string]struct{}) error {
var buf bytes.Buffer
if err := f.saveProtobufDir(&buf, seen, false); err != nil {
return fmt.Errorf("%s: %w", "input", err)
}
if err := f.saveProtobufDir(&buf, seen, true); err != nil {
return fmt.Errorf("%s: %w", "output", err)
}
_, err := dst.Write(buf.Bytes())
return err
}
func (f Function) saveProtobufDir(dst io.Writer, seen map[string]struct{}, out bool) error {
dirmap, dirname := DIR_IN, "input"
if out {
dirmap, dirname = DIR_OUT, "output"
}
args := make([]Argument, 0, len(f.Args)+1)
for _, arg := range f.Args {
if arg.Direction&dirmap > 0 {
args = append(args, arg)
}
}
// return variable for function out structs
if out && f.Returns != nil {
args = append(args, *f.Returns)
}
nm := f.name
if f.alias != "" {
nm = f.alias
}
return protoWriteMessageTyp(dst,
CamelCase(dot2D.Replace(strings.ToLower(nm))+"__"+dirname),
seen, getDirDoc(f.Documentation, dirmap), args...)
}
var dot2D = strings.NewReplacer(".", "__")
func protoWriteMessageTyp(dst io.Writer, msgName string, seen map[string]struct{}, D argDocs, args ...Argument) error {
for _, arg := range args {
if arg.Flavor == FLAVOR_TABLE && arg.TableOf == nil {
return fmt.Errorf("no table of data for %s.%s (%v): %w", msgName, arg, arg, ErrMissingTableOf)
}
}
var err error
w := &errWriter{Writer: dst, err: &err}
fmt.Fprintf(w, "%smessage %s {\n", asComment(strings.TrimRight(D.Pre+D.Post, " \n\t"), ""), msgName)
buf := Buffers.Get()
defer Buffers.Put(buf)
for i, arg := range args {
var rule string
if strings.HasSuffix(arg.Name, "#") {
arg.Name = replHidden(arg.Name)
}
if arg.Flavor == FLAVOR_TABLE {
if arg.TableOf == nil {
return fmt.Errorf("no table of data for %s.%s (%v): %w", msgName, arg, arg, ErrMissingTableOf)
}
rule = "repeated "
}
aName := arg.Name
got, err := arg.goType(false)
if err != nil {
return fmt.Errorf("%s: %w", msgName, err)
}
got = strings.TrimPrefix(got, "*")
if strings.HasPrefix(got, "[]") {
if got[2:] != "byte" {
rule = "repeated "
}
got = got[2:]
}
got = strings.TrimPrefix(got, "*")
if got == "" {
got = mkRecTypName(arg.Name)
}
typ, pOpts := protoType(got, arg.Name, arg.AbsType)
var optS string
if pOpts != nil {
if s := pOpts.String(); s != "" {
optS = " " + s
}
}
if arg.Flavor == FLAVOR_SIMPLE || arg.Flavor == FLAVOR_TABLE && arg.TableOf.Flavor == FLAVOR_SIMPLE {
fmt.Fprintf(w, "%s\t// %s\n\t%s%s %s = %d%s;\n", asComment(D.Map[aName], "\t"), arg.AbsType, rule, typ, aName, i+1, optS)
continue
}
typ = CamelCase(strings.Replace(strings.ToUpper(typ), "%ROWTYPE", "_rt", 1))
if _, ok := seen[typ]; !ok {
seen[typ] = struct{}{}
//lName := strings.ToLower(arg.Name)
subArgs := make([]Argument, 0, 16)
if arg.TableOf == nil {
for _, v := range arg.RecordOf {
subArgs = append(subArgs, *v.Argument)
}
} else {
if arg.TableOf.RecordOf == nil {
subArgs = append(subArgs, *arg.TableOf)
} else {
for _, v := range arg.TableOf.RecordOf {
subArgs = append(subArgs, *v.Argument)
}
}
}
if err = protoWriteMessageTyp(buf, typ, seen, argDocs{Pre: D.Map[aName]}, subArgs...); err != nil {
logger.Error("protoWriteMessageTyp", "error", err)
return err
}
}
fmt.Fprintf(w, "\t%s%s %s = %d%s;\n", rule, typ, aName, i+1, optS)
}
io.WriteString(w, "}\n")
w.Write(buf.Bytes())
return err
}
func protoType(got, aName, absType string) (string, protoOptions) {
switch trimmed := strings.ToLower(strings.TrimPrefix(strings.TrimPrefix(got, "[]"), "*")); trimmed {
case "bool", "string":
return trimmed, nil
case "int32":
if NumberAsString {
if Gogo {
return "sint32", protoOptions{"gogoproto.jsontag": aName + ",string,omitempty"}
}
}
return "sint32", nil
case "int64":
if NumberAsString {
if Gogo {
return "sint64", protoOptions{"gogoproto.jsontag": aName + ",string,omitempty"}
}
}
return "sint64", nil
case "float32", "sql.nullfloat32":
if NumberAsString {
if Gogo {
return "float", protoOptions{"gogoproto.jsontag": aName + ",string,omitempty"}
}
}
return "float", nil
case "double", "float64", "sql.nullfloat64":
if NumberAsString {
if Gogo {
return "double", protoOptions{"gogoproto.jsontag": aName + ",string,omitempty"}
}
}
return "double", nil
case "godror.number", "n":
if i := strings.IndexByte(absType, '('); i >= 0 && absType[len(absType)-1] == ')' {
if strings.HasPrefix(absType, "INTEGER(") || strings.HasPrefix(absType, "NUMBER(") {
s := absType[i+1 : len(absType)-1]
if !strings.ContainsRune(s, ',') {
prec, err := strconv.Atoi(s)
if err != nil {
panic(fmt.Errorf("%s(%q): %w", s, absType, err))
}
if prec < 10 {
return "sint32", nil
} else if prec < 19 {
return "sint64", nil
}
}
}
}
if Gogo {
return "string", protoOptions{
"gogoproto.jsontag": aName + ",omitempty",
}
}
return "string", nil
case "custom.date", "time.time":
if Gogo {
return "google.protobuf.Timestamp", protoOptions{
//"gogoproto.stdtime": true,
"gogoproto.customtype": "github.com/tgulacsi/oracall/custom.DateTime",
"gogoproto.moretags": `xml:",omitempty"`,
}
}
return "google.protobuf.Timestamp", nil
case "raw", "byte":
return "bytes", nil
case "godror.lob", "ora.lob":
if absType == "CLOB" {
return "string", nil
}
return "bytes", nil
default:
if !strings.Contains(trimmed, "_") {
panic(trimmed)
}
return trimmed, nil
}
}
type protoOptions map[string]interface{}
func (opts protoOptions) String() string {
if len(opts) == 0 {
return ""
}
var buf bytes.Buffer
buf.WriteByte('[')
for k, v := range opts {
if buf.Len() != 1 {
buf.WriteString(", ")
}
fmt.Fprintf(&buf, "(%s)=", k)
switch v.(type) {
case bool:
fmt.Fprintf(&buf, "%t", v)
default:
fmt.Fprintf(&buf, "%q", v)
}
}
buf.WriteByte(']')
return buf.String()
}
func CopyStruct(dest interface{}, src interface{}) error {
ds := fstructs.New(dest)
ss := fstructs.New(src)
snames := ss.Names()
svalues := ss.Values()
for _, df := range ds.Fields() {
dnm := df.Name()
for i, snm := range snames {
if snm == dnm || dnm == CamelCase(snm) || CamelCase(dnm) == snm {
if len(svalues) <= i {
panic(fmt.Errorf("more less svalues (%d) then names (%d)", len(svalues), len(snames)))
}
svalue := svalues[i]
if err := df.Set(svalue); err != nil {
return fmt.Errorf("set %q to %q (%v %T): %w", dnm, snm, svalue, svalue, err)
}
}
}
}
return nil
}
func mkRecTypName(name string) string { return strings.ToLower(name) + "_rek_typ" }
func asComment(s, prefix string) string {
return "\n" + prefix + "// " + strings.Replace(s, "\n", "\n"+prefix+"// ", -1) + "\n"
}