Add error message if no .go files are specified.

-- MOS_MIGRATED_REVID=86594902
Kuramyo · Feb 18, 2015 · c2d48be · c2d48be
1 parent f942ed1
commit c2d48be
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/base_workspace/tools/build_rules/go_rules.bzl b/base_workspace/tools/build_rules/go_rules.bzl
@@ -37,7 +37,7 @@ go_library()/go_binary()/go_test() rules:
 
 - No C++ interop.
 
-- deps must be populated by hand or using Glaze.
+- deps must be populated by hand.
 
 - go_test must have both test and non-test files in srcs.
 """
@@ -62,6 +62,9 @@ def go_compile_command(ctx, sources, out_lib):
 
 def go_library_impl(ctx):
   sources = ctx.files.srcs
+  if not sources:
+    fail("may not be empty", "srcs")
+
   out_lib = ctx.outputs.lib
 
   ctx.action(