Add meson.project_build/source_root() methods

2 files changed, 23 insertions, 0 deletions

diff --git a/mesonbuild/interpreter.py b/mesonbuild/interpreter.py
index 7df5571..0e5e0f8 100644
--- a/mesonbuild/interpreter.py
+++ b/mesonbuild/interpreter.py
@@ -1924,6 +1924,8 @@ class MesonMain(InterpreterObject):
                              'current_build_dir': self.current_build_dir_method,
                              'source_root': self.source_root_method,
                              'build_root': self.build_root_method,
+                             'project_source_root': self.project_source_root_method,
+                             'project_build_root': self.project_build_root_method,
                              'add_install_script': self.add_install_script_method,
                              'add_postconf_script': self.add_postconf_script_method,
                              'add_dist_script': self.add_dist_script_method,
@@ -2073,6 +2075,26 @@ class MesonMain(InterpreterObject):
 
     @noPosargs
     @permittedKwargs({})
+    @FeatureNew('meson.project_source_root', '0.56.0')
+    def project_source_root_method(self, args, kwargs):
+        src = self.interpreter.environment.source_dir
+        sub = self.interpreter.root_subdir
+        if sub == '':
+            return src
+        return os.path.join(src, sub)
+
+    @noPosargs
+    @permittedKwargs({})
+    @FeatureNew('meson.project_build_root', '0.56.0')
+    def project_build_root_method(self, args, kwargs):
+        src = self.interpreter.environment.build_dir
+        sub = self.interpreter.root_subdir
+        if sub == '':
+            return src
+        return os.path.join(src, sub)
+
+    @noPosargs
+    @permittedKwargs({})
     @FeatureDeprecated('meson.has_exe_wrapper', '0.55.0', 'use meson.can_run_host_binaries instead.')
     def has_exe_wrapper_method(self, args: T.Tuple[object, ...], kwargs: T.Dict[str, object]) -> bool:
         return self.can_run_host_binaries_impl(args, kwargs)
diff --git a/mesonbuild/interpreterbase.py b/mesonbuild/interpreterbase.py
index 1524409..d3f8181 100644
--- a/mesonbuild/interpreterbase.py
+++ b/mesonbuild/interpreterbase.py
@@ -464,6 +464,7 @@ class InterpreterBase:
         self.funcs = {}    # type: T.Dict[str, T.Callable[[mparser.BaseNode, T.List[TYPE_nvar], T.Dict[str, TYPE_nvar]], TYPE_var]]
         self.builtin = {}  # type: T.Dict[str, InterpreterObject]
         self.subdir = subdir
+        self.root_subdir = subdir
         self.subproject = subproject
         self.variables = {}  # type: T.Dict[str, TYPE_var]
         self.argument_depth = 0