AUTH-2993 added workers updater logic

cmd/cloudflared/updater/service.go

@@ -0,0 +1,26 @@
+package updater
+
+// Version is the functions needed to perform an update
+type Version interface {
+	Apply() error
+	String() string
+}
+
+// Service is the functions to get check for new updates
+type Service interface {
+	Check() (Version, error)
+}
+
+const (
+	// OSKeyName is the url parameter key to send to the checkin API for the operating system of the local cloudflared (e.g. windows, darwin, linux)
+	OSKeyName = "os"
+
+	// ArchitectureKeyName is the url parameter key to send to the checkin API for the architecture of the local cloudflared (e.g. amd64, x86)
+	ArchitectureKeyName = "arch"
+
+	// BetaKeyName is the url parameter key to send to the checkin API to signal if the update should be a beta version or not
+	BetaKeyName = "beta"
+
+	// VersionKeyName is the url parameter key to send to the checkin API to specific what version to upgrade or downgrade to
+	VersionKeyName = "version"
+)