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source.go
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source.go
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package selfupdate
import (
"bytes"
"errors"
"github.com/Masterminds/semver/v3"
"github.com/starudream/go-lib/core/v2/slog"
)
type Source interface {
Latest() (string, error)
Binary(version string) ([]byte, error)
}
var (
ErrInvalidLocalVersion = errors.New("invalid local version")
ErrInvalidRemoteVersion = errors.New("invalid remote version")
ErrInvalidRemoteFile = errors.New("invalid remote file")
)
func Update(source Source, confirm func() bool) error {
local := CurrentVersion()
if local == nil {
return ErrInvalidLocalVersion
}
v, err := source.Latest()
if err != nil {
return err
}
remote, err := semver.NewVersion(v)
if err != nil {
return ErrInvalidRemoteVersion
}
if remote.Equal(local) {
slog.Info("up to date", slog.String("remote", remote.String()))
return nil
} else if remote.LessThan(local) {
slog.Info("no need to update", slog.String("local", local.String()), slog.String("remote", remote.String()))
return nil
}
slog.Info("update available", slog.String("local", local.String()), slog.String("remote", remote.String()))
if !confirm() {
return nil
}
binary, err := source.Binary(v)
if err != nil {
return err
}
err = Apply(bytes.NewReader(binary))
if err != nil {
return err
}
current := CurrentVersion()
if current == nil {
return ErrInvalidRemoteFile
}
slog.Info("updated", slog.String("before", local.String()), slog.String("after", current.String()))
return nil
}