Enable auto-generating sources rules

examples/apiserver/BUILD

@@ -29,3 +29,20 @@ go_library(
         "//vendor:github.com/golang/glog",
     ],
 )
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [
+        ":package-srcs",
+        "//examples/apiserver/rest:all-srcs",
+        "//examples/apiserver/server:all-srcs",
+    ],
+    tags = ["automanaged"],
+)

examples/apiserver/rest/BUILD

@@ -24,3 +24,16 @@ go_library(
         "//pkg/util/validation/field:go_default_library",
     ],
 )
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+)

examples/apiserver/server/BUILD

@@ -26,3 +26,16 @@ go_library(
         "//vendor:github.com/spf13/pflag",
     ],
 )
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+)