[tint][build] Guard WGSL writer with tint_build_wgsl_writer

Change-Id: Id188456ada3fae3abd7931c453f1d958e4e9b9a4
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/155444
Kokoro: Kokoro <noreply+kokoro@google.com>
Auto-Submit: Ben Clayton <bclayton@google.com>
Commit-Queue: James Price <jrprice@google.com>
Reviewed-by: James Price <jrprice@google.com>
diff --git a/src/tint/cmd/common/BUILD.bazel b/src/tint/cmd/common/BUILD.bazel
index 5ff1ba3..acbed19 100644
--- a/src/tint/cmd/common/BUILD.bazel
+++ b/src/tint/cmd/common/BUILD.bazel
@@ -47,7 +47,6 @@
     "//src/tint/lang/wgsl/program",
     "//src/tint/lang/wgsl/reader",
     "//src/tint/lang/wgsl/sem",
-    "//src/tint/lang/wgsl/writer",
     "//src/tint/utils/containers",
     "//src/tint/utils/diagnostic",
     "//src/tint/utils/ice",
@@ -71,6 +70,11 @@
       "@spirv_tools",
     ],
     "//conditions:default": [],
+  }) + select({
+    ":tint_build_wgsl_writer": [
+      "//src/tint/lang/wgsl/writer",
+    ],
+    "//conditions:default": [],
   }),
   copts = COPTS,
   visibility = ["//visibility:public"],
@@ -122,6 +126,11 @@
   actual = "//src/tint:tint_build_spv_writer_true",
 )
 
+alias(
+  name = "tint_build_wgsl_writer",
+  actual = "//src/tint:tint_build_wgsl_writer_true",
+)
+
 selects.config_setting_group(
     name = "tint_build_spv_reader_or_tint_build_spv_writer",
     match_any = [