1 files changed, 9 insertions, 0 deletions
diff --git a/build.py b/build.py
index 753ede7..3a4d4e3 100644
--- a/build.py
+++ b/build.py
@@ -137,6 +137,7 @@ class BuildTarget():
         self.process_kwargs(kwargs, environment)
         if len(self.sources) == 0 and len(self.generated) == 0:
             raise InvalidArguments('Build target %s has no sources.' % name)
+        self.validate_sources()
 
     def process_objectlist(self, objects):
         assert(isinstance(objects, list))
@@ -164,6 +165,14 @@ class BuildTarget():
             else:
                 raise InvalidArguments('Bad source in target %s.' % self.name)
 
+    def validate_sources(self):
+        if len(self.sources) > 0:
+            first = os.path.split(self.sources[0])[1]
+            (base, suffix) = os.path.splitext(first)
+            if suffix == '.rs':
+                if self.name != base:
+                    raise InvalidArguments('In Rust targets, the first source file must be named projectname.rs.')
+
     def get_original_kwargs(self):
         return self.kwargs