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//go:build go1.20
// +build go1.20
// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
// Use of this source code is governed by the GPL 3.0
// protobuf the way I am using them, require GO 1.20. I think. I could be wrong.
// The Go Protocol Buffers library embeds a sync.Mutex within the MessageState struct to prevent unintended shallow copies of message structs
// this optionally (but it is the default) inserts a mutex into the struct generated by protoc
// go:generate autogenpb --proto file.proto
package main
import (
"errors"
"os"
"path/filepath"
"go.wit.com/log"
)
func doClean(filebase string) error {
globPattern := filebase + ".*.pb.go"
files, err := filepath.Glob(globPattern)
if err != nil {
log.Info("glob error", err, files)
}
for _, filename := range files {
// err += os.Remove(filename)
err = errors.Join(err, os.Remove(filename))
}
log.Info("Removed:", files)
return err
}
// is true if no errors and nothing is new
func doCtime(filebase string) bool {
var allerr error
statf, err := os.Stat(filebase + ".proto")
allerr = errors.Join(allerr, err)
basetime := statf.ModTime()
globPattern := filebase + ".*.pb.go"
files, err := filepath.Glob(globPattern)
if err != nil {
log.Info("glob error", err, files)
allerr = errors.Join(allerr, err)
}
if len(files) == 0 {
log.Info("no pb.go files found. need to re-run")
return false
}
for _, filename := range files {
fstats, err := os.Stat(filename)
allerr = errors.Join(allerr, err)
newtime := fstats.ModTime()
if basetime.Before(newtime) {
// everything is okay
// log.Info(filebase+".proto was older than", filename)
} else {
log.Info(filebase+".proto was newer than", filename)
// need to rerun
err := doClean(filebase)
allerr = errors.Join(allerr, err)
if allerr != nil {
log.Info("autogenpb doCtime() had errors:", allerr)
}
return false
}
}
log.Info(filebase + ".proto was older than all pb.go files. No need to re-run autogenpb.")
if allerr == nil {
return true
}
log.Info("autogenpb doCtime() had errors:", allerr)
return false
}
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