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// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
// Use of this source code is governed by the GPL 3.0
package main
// auto run protoc with the correct args
import (
"os"
"strings"
"go.wit.com/lib/fhelp"
"go.wit.com/log"
"golang.org/x/text/cases"
"golang.org/x/text/language"
)
// this parses the .proto file and handles anything with `autogenpb: `
func (pf *File) protoParse() error {
// does the file conform to the standard? (also reads in UUID & Version)
// if err := pb.hasPluralMessage(pf); err != nil {
// return err
// }
// os.Exit(0)
uuid, version, err := fhelp.ValidProtobuf(pf.Filename)
if err != nil {
// the user can bypass this, but it's probably not worth allowing this
if os.Getenv("PROTOBUF_REGRET") != "true" {
return err
}
}
pf.Uuid = uuid
pf.Version = version
// read in the .proto file
data, err := os.ReadFile(pf.Filename)
if err != nil {
return err
}
var curmsg *MsgName
// parse the proto file for message struct names
for _, line := range strings.Split(string(data), "\n") {
if strings.HasPrefix(line, "message ") {
if curmsg != nil {
// message defined inside another message
}
curmsg = pf.parseForMessage(line)
}
// this logic isn't right. find end of message with more bravado
if strings.HasPrefix(line, "}") {
curmsg = nil
}
if curmsg == nil {
// log.Info("curmsg == nil", line)
// can't contiue on nil below here
// TODO: look for and format enum structs here
continue
}
// log.Info("curmsg != nil", line)
parts := strings.Fields(line)
msgvar := parseMsgVar(line)
if msgvar == nil {
// log.Info("Junk in .proto file? line did not contain a message var:", line)
continue
}
if msgvar.IsRepeated {
// log.Info("ADDING ITER MAP", curmsg.Name, msgvar.VarType)
pf.IterMap[curmsg.Name] = msgvar.VarType
}
if strings.Contains(line, "autogenpb:sort") {
newS := cases.Title(language.English, cases.NoLower).String(parts[1])
// log.Info("Addded Sort:", newS, "in struct", curmsg.Name)
curmsg.Sort = append(curmsg.Sort, newS)
msgvar.HasSort = true
}
if strings.Contains(line, "autogenpb:unique") {
newU := parts[1]
newU = cases.Title(language.English, cases.NoLower).String(newU)
// log.Info("Added Unique:", newU, "in struct", curmsg.Name)
curmsg.Unique = append(curmsg.Unique, newU)
msgvar.HasUnique = true
}
curmsg.Vars = append(curmsg.Vars, msgvar)
}
pf.makeSortTable()
// for i, s := range slices.Backward(pf.ToSort) {
return nil
}
func (pf *File) makeSortTable() {
pf.sortWhat(pf.Bases)
pf.sortWhat(pf.Base)
// everything else
for _, msg := range pf.MsgNames {
pf.sortWhat(msg)
}
}
func (pf *File) sortWhat(msg *MsgName) {
for _, v := range msg.Vars {
if !v.IsRepeated {
continue
}
if check := pf.findMsg(v.VarType); check == nil {
// the VarType must be a struct
continue
}
s := new(Sort)
s.MsgName = msg.Name
s.VarType = v.VarType
s.VarName = v.VarName
s.Lockname = msg.Lockname
pf.ToSort = append(pf.ToSort, s)
}
}
func parseMsgVar(line string) *MsgVar {
if strings.Contains(line, "//") {
parts := strings.Split(line, "//")
if len(parts) == 0 {
// log.Info("parseMsgVar() nothing line", line)
return nil
}
line = parts[0]
}
parts := strings.Fields(line)
if len(parts) < 3 {
// log.Info("parseMsgVar() len < 3", parts)
return nil
}
if parts[0] == "message" {
// this is the struct
return nil
}
v := new(MsgVar)
if parts[0] == "repeated" {
v.IsRepeated = true
v.VarType = parts[1]
v.VarName = cases.Title(language.English, cases.NoLower).String(parts[2])
return v
}
v.VarType = parts[0]
v.VarName = cases.Title(language.English, cases.NoLower).String(parts[1])
return v
}
// looks for mutex and marshal entries
func (pf *File) parseForMessage(line string) *MsgName {
fields := strings.Fields(line)
if len(fields) == 0 || fields[0] != "message" {
// this line doesn't start with message
return nil
}
var msg *MsgName
msg = new(MsgName)
base := cases.Title(language.English, cases.NoLower).String(pf.Filebase)
prefix := "message " + base + "s {" // only look for this for now
if strings.HasPrefix(line, prefix) {
pf.Bases = msg
} else {
prefix := "message " + base + " {" // only look for this for now
if strings.HasPrefix(line, prefix) {
pf.Base = msg
} else {
pf.MsgNames = append(pf.MsgNames, msg)
}
}
msgName := cases.Title(language.English, cases.NoLower).String(fields[1])
// log.Info("found messge:", msgName)
msg.Name = msgName
msg.Lockname = pf.Filebase + "Mu" // this should be lowercase. do not export the Mutex
msg.NeedIter = true
if strings.Contains(line, "`autogenpb:mutex`") {
msg.DoMutex = true
// log.Info("Added Mutex=true:", msg.Name)
}
if strings.Contains(line, "`autogenpb:nomutex`") {
msg.NoMutex = true
// log.Info("Added Mutex=true:", msg.Name)
}
if strings.Contains(line, "`autogenpb:marshal`") {
msg.DoMarshal = true
}
if strings.Contains(line, "`autogenpb:http") {
log.Info("got autogenpb:http")
pf.DoHTTP = true
msg.DoHTTP = true
msg.DoMarshal = true // http requires Marshal
}
if strings.Contains(line, "`autogenpb:gui") {
log.Info("got autogenpb:gui")
pf.DoGui = true
msg.DoGui = true
parts := strings.Split(line, "autogenpb:gu")
if len(parts) != 2 {
log.Info("len(parts) != 2", line)
os.Exit(-1)
}
log.Info("line =", line)
log.Info("end =", parts[1])
end := strings.Split(parts[1], "`")
if end[0] != "i" {
varname := strings.TrimPrefix(end[0], "i:")
msg.GuiVarName = varname
log.Info("varname =", varname)
} else {
if strings.HasSuffix(msgName, "s") {
varname := strings.TrimSuffix(msgName, "s")
msg.GuiVarName = varname
}
}
}
return msg
}
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