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update.go
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package update
import (
"fmt"
"strings"
"github.com/AppImageCrafters/appimage-update/updaters"
"github.com/AppImageCrafters/appimage-update/util"
)
type Updater interface {
Method() string
Lookup() (updateAvailable bool, err error)
Download() (output string, err error)
}
// factory updaters for creating Updater instances from an AppImage file
func NewUpdaterFor(target string) (Updater, error) {
updateInfoString, err := util.ReadUpdateInfo(target)
if err != nil {
return nil, err
}
return NewUpdateForUpdateString(updateInfoString, target)
}
func NewUpdateForUpdateString(updateInfoString string, appImagePath string) (Updater, error) {
if strings.HasPrefix(updateInfoString, "zsync") {
return updaters.NewZSyncUpdater(&updateInfoString, appImagePath)
}
if strings.HasPrefix(updateInfoString, "gh-releases-zsync") {
return updaters.NewGitHubZsyncUpdater(&updateInfoString, appImagePath)
}
if strings.HasPrefix(updateInfoString, "gh-releases-direct") {
return updaters.NewGitHubDirectUpdater(&updateInfoString, appImagePath)
}
if strings.HasPrefix(updateInfoString, "ocs-v1-appimagehub-direct") {
return updaters.NewOCSAppImageHubDirect(&updateInfoString, appImagePath)
}
if strings.HasPrefix(updateInfoString, "ocs-v1-appimagehub-zsync") {
return updaters.NewOCSAppImageHubZSync(&updateInfoString, appImagePath)
}
return nil, fmt.Errorf("Invalid updated information: ", updateInfoString)
}