Fix remaining Interpreter object leaks.

mesonbuild/build.py

@@ -546,10 +546,14 @@ class BuildTarget(Target):
             d = [d]
         newd = []
         for i in d:
-            if hasattr(i, 'held_object'):
+            if isinstance(i, list):
-                newd.append(i.held_object)
+                i = self.unpack_holder(i)
-            else:
+            elif hasattr(i, 'held_object'):
-                newd.append(i)
+                i = i.held_object
+            for t in ['dependencies', 'link_with', 'include_directories', 'sources']:
+                if hasattr(i, t):
+                    setattr(i, t, self.unpack_holder(getattr(i, t)))
+            newd.append(i)
         return newd
 
     def copy_kwargs(self, kwargs):
@@ -557,10 +561,14 @@ class BuildTarget(Target):
         # This sucks quite badly. Arguments
         # are holders but they can't be pickled
         # so unpack those known.
-        if 'dependencies' in self.kwargs:
+        for k, v in self.kwargs.items():
-            self.kwargs['dependencies'] = self.unpack_holder(self.kwargs['dependencies'])
+            if isinstance(v, list):
-        if 'link_with' in self.kwargs:
+                self.kwargs[k] = self.unpack_holder(v)
-            self.kwargs['link_with'] = self.unpack_holder(self.kwargs['link_with'])
+            if hasattr(v, 'held_object'):
+                self.kwargs[k] = v.held_object
+        for t in ['dependencies', 'link_with', 'include_directories', 'sources']:
+            if t in self.kwargs:
+                self.kwargs[t] = self.unpack_holder(self.kwargs[t])
 
     def extract_objects(self, srclist):
         obj_src = []

mesonbuild/interpreter.py

@@ -1522,7 +1522,13 @@ class Interpreter(InterpreterBase):
             if not isinstance(d, (dependencies.Dependency, dependencies.ExternalLibrary, dependencies.InternalDependency)):
                 raise InterpreterException('Dependencies must be external deps')
             final_deps.append(d)
-        dep = dependencies.InternalDependency(version, incs, compile_args, link_args, libs, sources, final_deps)
+        dep = dependencies.InternalDependency(version,
+                                              mesonlib.unholder_array(incs),
+                                              compile_args,
+                                              link_args,
+                                              mesonlib.unholder_array(libs),
+                                              mesonlib.unholder_array(sources),
+                                              final_deps)
         return DependencyHolder(dep)
 
     @noKwargs
@@ -2289,6 +2295,7 @@ class Interpreter(InterpreterBase):
         for i in cmd_args:
             if not isinstance(i, (str, mesonlib.File, TargetHolder)):
                 raise InterpreterException('Command line arguments must be strings, files or targets.')
+        cmd_args = mesonlib.unholder_array(cmd_args)
         env = self.unpack_env_kwarg(kwargs)
         should_fail = kwargs.get('should_fail', False)
         if not isinstance(should_fail, bool):

mesonbuild/mesonlib.py

@@ -709,6 +709,14 @@ def windows_proof_rmtree(f):
     # Try one last time and throw if it fails.
     shutil.rmtree(f)
 
+def unholder_array(entries):
+    result = []
+    for e in entries:
+        if hasattr(e, 'held_object'):
+            e = e.held_object
+        result.append(e)
+    return result
+
 class OrderedSet(collections.MutableSet):
     """A set that preserves the order in which items are added, by first
     insertion.