targets: allow dependencies to have dependencies

Signed-off-by: Filipe Laíns <lains@riseup.net>

build_targets/__init__.py

@@ -4,6 +4,7 @@
 from __future__ import annotations
 
 import argparse
+import itertools
 import logging
 import os
 import os.path
@@ -101,6 +102,7 @@ def __init__(
         self,
         debug: bool = False,
         linker_script: Optional[str] = None,
+        dependencies: Optional[List[BuildDependency]] = None,
         **kwargs: Any,
     ) -> None:
         self.__log = logging.getLogger(self.__class__.__name__)
@@ -117,7 +119,7 @@ def __init__(
             'include_files': [],
             'c_flags': [],
             'ld_flags': [],
-            'dependencies': [],
+            'dependencies': dependencies or [],
             'external_include': [],
         }
 
@@ -280,6 +282,14 @@ def vendor_c_flags(self) -> List[str]:
             fr'-DOI_VERSION=\"{self.version}\"',
         ]
 
+    @property
+    def dependencies(self) -> List[BuildDependency]:
+        return self._settings['dependencies']
+
+    @dependencies.setter
+    def dependencies(self, value: List[BuildDependency]) -> None:
+        self._settings['dependencies'] = value
+
 
 class _BuildConfigurationMeta(type):
     '''
@@ -354,14 +364,6 @@ def __init__(
         if self.toolchain is None:
             raise BuildConfigurationError('No toolchain specified')
 
-    @property
-    def dependencies(self) -> List[BuildDependency]:
-        return self._settings['dependencies']
-
-    @dependencies.setter
-    def dependencies(self, value: List[BuildDependency]) -> None:
-        self._settings['dependencies'] = value
-
 
 class BuildConfiguration(_BuildConfiguration, metaclass=_BuildConfigurationMeta):
     pass
@@ -378,6 +380,12 @@ def external_include(self) -> List[str]:
     def external_include(self, value: List[str]) -> None:
         self._settings['external_include'] = value
 
+    @property
+    def dependencies_include(self) -> List[str]:
+        return list(itertools.chain.from_iterable([
+            dependency.external_include for dependency in self.dependencies
+        ]))
+
 
 class BuildDependency(_BuildDependency, metaclass=_BuildConfigurationMeta):
     pass

configure.py

@@ -212,9 +212,11 @@ def write_ninja(self, file: str = 'build.ninja') -> None:
                     continue
                 nw.comment(f'{dependency.name} objects')
                 nw.newline()
-                c_include_flags = [f'-I{path}' for path in dependency.include]
+                c_include_flags = {
+                    f'-I{path}' for path in dependency.include + dependency.dependencies_include
+                }
                 for file in set(dependency.source):
-                    objs += cc_abs(file, variables=[('c_include_flags', c_include_flags)])
+                    objs += cc_abs(file, variables=[('c_include_flags', list(c_include_flags))])
                 nw.newline()
 
             # compile target sources into objects