Fix issue when Library Dependency Finder (LDF) does not handle custom “src_dir” // Resolve #942

HISTORY.rst

@@ -24,6 +24,9 @@ PlatformIO 3.0
   (`pull #949 <https://github.com/platformio/platformio-core/pull/949>`_)
 * Fixed linter error "unity.h does not exist" for Unit Testing
   (`issue #947 <https://github.com/platformio/platformio-core/issues/947>`_)
+* Fixed issue when `Library Dependency Finder (LDF) <http://docs.platformio.org/page/librarymanager/ldf.html>`__
+  does not handle custom ``src_dir``
+  (`issue #942 <https://github.com/platformio/platformio-core/issues/942>`_)
 
 -------
 

platformio/builder/tools/piolib.py

@@ -411,6 +411,10 @@ class ProjectAsLibBuilder(LibBuilderBase):
         LibBuilderBase.__init__(self, *args, **kwargs)
         self._is_built = True
 
+    @property
+    def src_dir(self):
+        return self.env.subst("$PROJECTSRC_DIR")
+
     @property
     def lib_ldf_mode(self):
         mode = LibBuilderBase.lib_ldf_mode.fget(self)