# update
```go
import "katenary/update"
```
Update package is used to check if a new version of katenary is available.
## Variables
```go
var (
Version = "master" // reset by cmd/main.go
)
```
## func [DownloadFile]()
```go
func DownloadFile(url, exe string) error
```
DownloadFile will download a url to a local file. It also ensure that the file is executable.
## func [DownloadLatestVersion]()
```go
func DownloadLatestVersion(assets []Asset) error
```
DownloadLatestVersion will download the latest version of katenary.
## type [Asset]()
Asset is a github asset from release url.
```go
type Asset struct {
Name string `json:"name"`
URL string `json:"browser_download_url"`
}
```
### func [CheckLatestVersion]()
```go
func CheckLatestVersion() (string, []Asset, error)
```
CheckLatestVersion check katenary latest version from release and propose to download it
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