func main() {
flag.Parse()
args := flag.Args()
for _, path := range args {
hash, _ := utils.HashFile(path)
fmt.Println(hash)
}
}
func (c *WOFClone) HasChanged(local string, remote string) (bool, error) {
change := true
local_hash, err := utils.HashFile(local)
if err != nil {
c.Logger.Error("Failed to hash %s, becase %v", local, err)
return change, err
}
return c.HasHashChanged(local_hash, remote)
}
func (sink *Sync) HasChanged(source string, dest string) (ch bool, err error) {
sink.Logger.Debug("HEAD s3://%s/%s", sink.Bucket, dest)
// https://docs.aws.amazon.com/sdk-for-go/api/service/s3/#HeadObjectInput
// https://docs.aws.amazon.com/sdk-for-go/api/service/s3/#HeadObjectOutput
params := &s3.HeadObjectInput{
Bucket: aws.String(sink.Bucket),
Key: aws.String(dest),
}
// sink.Logger.Debug(params.GoString())
rsp, err := sink.Service.HeadObject(params)
if err != nil {
aws_err := err.(awserr.Error)
if aws_err.Code() == "NotFound" {
sink.Logger.Info("%s is 404", dest)
return true, nil
}
sink.Logger.Error("Failed to HEAD %s because %s", dest, err)
return false, err
}
local_hash, err := utils.HashFile(source)
if err != nil {
sink.Logger.Warning("Failed to hash %s, because %v", source, err)
return false, err
}
etag := *rsp.ETag
remote_hash := strings.Replace(etag, "\"", "", -1)
sink.Logger.Debug("Local hash is %s remote hash is %s", local_hash, remote_hash)
if local_hash == remote_hash {
return false, nil
}
// Okay so we think that things have changed but let's just check
// modification times to be extra sure (20151112/thisisaaronland)
info, err := os.Stat(source)
if err != nil {
sink.Logger.Error("Failed to stat %s because %s", source, err)
return false, err
}
mtime_local := info.ModTime()
mtime_remote := *rsp.LastModified
// Because who remembers this stuff anyway...
// func (t Time) Before(u Time) bool
// Before reports whether the time instant t is before u.
sink.Logger.Debug("Local %s %s", mtime_local, source)
sink.Logger.Debug("Remote %s %s", mtime_remote, dest)
if mtime_local.Before(mtime_remote) {
sink.Logger.Warning("Remote copy of %s has a more recent modification date (local: %s remote: %s)", source, mtime_local, mtime_remote)
return false, nil
}
return true, nil
}