Store extra_files as file objects. Helps with #1686.

mesonbuild/backend/vs2010backend.py

@@ -980,7 +980,7 @@ class Vs2010Backend(backends.Backend):
             for h in gen_hdrs:
                 ET.SubElement(inc_hdrs, 'CLInclude', Include=h)
             for h in target.extra_files:
-                relpath = os.path.join(proj_to_src_dir, h)
+                relpath = os.path.join(down, h.rel_to_builddir(self.build_to_src))
                 ET.SubElement(inc_hdrs, 'CLInclude', Include=relpath)
 
         if len(sources) + len(gen_src) + len(pch_sources) > 0:

mesonbuild/build.py

@@ -648,12 +648,11 @@ class BuildTarget(Target):
         elif 'gui_app' in kwargs:
             raise InvalidArguments('Argument gui_app can only be used on executables.')
         extra_files = kwargs.get('extra_files', [])
-        if isinstance(extra_files, str):
+        if not isinstance(extra_files, list):
             extra_files = [extra_files]
         for i in extra_files:
-            if not isinstance(i, str):
-                raise InvalidArguments('Arguments to extra_files must be strings.')
-            trial = os.path.join(environment.get_source_dir(), self.subdir, i)
+            assert(isinstance(i, File))
+            trial = os.path.join(environment.get_source_dir(), i.subdir, i.fname)
             if not(os.path.isfile(trial)):
                 raise InvalidArguments('Tried to add non-existing extra file %s.' % i)
         self.extra_files = extra_files

mesonbuild/interpreter.py

@@ -2554,6 +2554,11 @@ different subdirectory.
         sources = self.source_strings_to_files(sources)
         objs = self.flatten(kwargs.get('objects', []))
         kwargs['dependencies'] = self.flatten(kwargs.get('dependencies', []))
+        if 'extra_files' in kwargs:
+            ef = kwargs['extra_files']
+            if not isinstance(ef, list):
+                ef = [ef]
+            kwargs['extra_files'] = self.source_strings_to_files(ef)
         if not isinstance(objs, list):
             objs = [objs]
         self.check_sources_exist(os.path.join(self.source_root, self.subdir), sources)