Export BuildID via expvars.

cmd/shell.go

@@ -25,6 +25,7 @@ import (
 	"encoding/json"
 	"encoding/pem"
 	"errors"
+	_ "expvar" // For DebugServer, below.
 	"fmt"
 	"io/ioutil"
 	"log"

core/util.go

@@ -21,6 +21,7 @@ import (
 	"encoding/json"
 	"encoding/pem"
 	"errors"
+	"expvar"
 	"fmt"
 	"hash"
 	"io"
@@ -48,6 +49,11 @@ var BuildHost string
 // BuildTime is set by the compiler and is used by GetBuildTime
 var BuildTime string
 
+func init() {
+	expvar.NewString("BuildID").Set(BuildID)
+	expvar.NewString("BuildTime").Set(BuildTime)
+}
+
 // Errors
 
 // InternalServerError indicates that something has gone wrong unrelated to the