Add some version reading info

version/version.go

@@ -0,0 +1,61 @@
+package version
+
+import (
+	"context"
+	"sync"
+
+	"github.com/google/go-github/v44/github"
+	"golang.org/x/mod/semver"
+)
+
+const Tag = "v0.0.1"
+
+var versionInfo struct {
+	Local struct {
+		Tag string
+	}
+	Remote struct {
+		Valid bool
+		Tag   string
+	}
+	m sync.Mutex
+}
+
+func init() {
+	versionInfo.Remote.Valid = false
+	versionInfo.Local.Tag = Tag
+}
+
+func Is() string {
+	return versionInfo.Local.Tag
+}
+
+func UpgradeAvailable() (bool, string) {
+	versionInfo.m.Lock()
+	defer versionInfo.m.Unlock()
+	if !versionInfo.Remote.Valid {
+		return false, ""
+	}
+	if semver.Compare(versionInfo.Local.Tag, versionInfo.Remote.Tag) < 0 {
+		return true, versionInfo.Remote.Tag
+	}
+	return false, ""
+
+}
+
+func UpdateVersionInfo() {
+	client := github.NewClient(nil)
+
+	rels, _, err := client.Repositories.ListReleases(context.Background(), "tardisx", "linkwallet", nil)
+	if err != nil {
+		panic(err)
+	}
+	if len(rels) == 0 {
+		return
+	}
+	versionInfo.m.Lock()
+	versionInfo.Remote.Tag = *rels[0].TagName
+	versionInfo.Remote.Valid = true
+	versionInfo.m.Unlock()
+
+}