mirror of https://github.com/Bios-Marcel/cordless
61 lines
2.0 KiB
Go
61 lines
2.0 KiB
Go
package version
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import (
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"context"
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"fmt"
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"github.com/google/go-github/v29/github"
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)
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var latestRemoteVersion string
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// CheckForUpdate checks whether the Version-string saved at version.Version
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// is different to the name of the latest tagged GitHub release. If it is, and
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// the release name isn't equal to the `donRemindFor`-parameter, we return
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// true, which stands for "update available". This allows the user to manually
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// say "Don't remind me again for this version". The actual return value is
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// supplied via a channel that's closed after one value has been read.
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func CheckForUpdate(dontRemindFor string) chan bool {
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//Note, this isn't buffered, so that we can safely close the channel
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//when it has been read by the caller.
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updateAvailableChannel := make(chan bool)
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go func() {
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remoteVersion := GetLatestRemoteVersion()
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if remoteVersion == "" || remoteVersion == dontRemindFor {
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//Error retrieving version or user wishes to ignore update.
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updateAvailableChannel <- false
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} else {
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updateAvailableChannel <- isLocalOlderThanRemote(Version, remoteVersion)
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}
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close(updateAvailableChannel)
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}()
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return updateAvailableChannel
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}
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func isLocalOlderThanRemote(local, remote string) bool {
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yearRemote, monthRemote, dayRemote := parseTag(remote)
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yearLocal, monthLocal, dayLocal := parseTag(local)
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return !(yearLocal >= yearRemote && monthLocal >= monthRemote && dayLocal >= dayRemote)
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}
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func parseTag(tag string) (year int, month int, day int) {
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fmt.Sscanf(tag, "%04d-%02d-%02d", &year, &month, &day)
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return
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}
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// GetLatestRemoteVersion queries GitHub for the latest Release-Tag and caches
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// it. This value will never be updated during runtime.
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func GetLatestRemoteVersion() string {
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if latestRemoteVersion != "" {
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return latestRemoteVersion
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}
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repositoryRelease, _, lookupError := github.NewClient(nil).Repositories.GetLatestRelease(context.Background(), "Bios-Marcel", "cordless")
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if lookupError != nil || repositoryRelease == nil {
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return ""
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}
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latestRemoteVersion = *repositoryRelease.TagName
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return latestRemoteVersion
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}
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