Move LD_LIBRARY_PATH logic to environment object

mesonbuild/backend/backends.py

@@ -1987,12 +1987,9 @@ class Backend:
         return []
 
     def get_devenv(self) -> mesonlib.EnvironmentVariables:
-        env = mesonlib.EnvironmentVariables()
         extra_paths = set()
         library_paths = set()
-        build_machine = self.environment.machines[MachineChoice.BUILD]
         host_machine = self.environment.machines[MachineChoice.HOST]
-        need_wine = not build_machine.is_windows() and host_machine.is_windows()
         for t in self.build.get_targets().values():
             in_default_dir = t.should_install() and not t.get_install_dir()[2]
             if t.for_machine != MachineChoice.HOST or not in_default_dir:
@@ -2012,24 +2009,7 @@ class Backend:
                 # LD_LIBRARY_PATH. This allows running system applications using
                 # that library.
                 library_paths.add(tdir)
-        if need_wine:
-            # Executable paths should be in both PATH and WINEPATH.
-            # - Having them in PATH makes bash completion find it,
-            #   and make running "foo.exe" find it when wine-binfmt is installed.
-            # - Having them in WINEPATH makes "wine foo.exe" find it.
-            library_paths.update(extra_paths)
-        if library_paths:
-            if need_wine:
-                env.prepend('WINEPATH', list(library_paths), separator=';')
-            elif host_machine.is_windows() or host_machine.is_cygwin():
-                extra_paths.update(library_paths)
-            elif host_machine.is_darwin():
-                env.prepend('DYLD_LIBRARY_PATH', list(library_paths))
-            else:
-                env.prepend('LD_LIBRARY_PATH', list(library_paths))
-        if extra_paths:
-            env.prepend('PATH', list(extra_paths))
-        return env
+        return self.environment.get_env_for_paths(library_paths, extra_paths)
 
     def compiler_to_generator_args(self, target: build.BuildTarget,
                                    compiler: 'Compiler', output: str = '@OUTPUT@',

mesonbuild/environment.py

@@ -1000,3 +1000,25 @@ class Environment:
 
     def has_exe_wrapper(self) -> bool:
         return self.exe_wrapper and self.exe_wrapper.found()
+
+    def get_env_for_paths(self, library_paths: T.Set[str], extra_paths: T.Set[str]) -> mesonlib.EnvironmentVariables:
+        env = mesonlib.EnvironmentVariables()
+        need_wine = not self.machines.build.is_windows() and self.machines.host.is_windows()
+        if need_wine:
+            # Executable paths should be in both PATH and WINEPATH.
+            # - Having them in PATH makes bash completion find it,
+            #   and make running "foo.exe" find it when wine-binfmt is installed.
+            # - Having them in WINEPATH makes "wine foo.exe" find it.
+            library_paths.update(extra_paths)
+        if library_paths:
+            if need_wine:
+                env.prepend('WINEPATH', list(library_paths), separator=';')
+            elif self.machines.host.is_windows() or self.machines.host.is_cygwin():
+                extra_paths.update(library_paths)
+            elif self.machines.host.is_darwin():
+                env.prepend('DYLD_LIBRARY_PATH', list(library_paths))
+            else:
+                env.prepend('LD_LIBRARY_PATH', list(library_paths))
+        if extra_paths:
+            env.prepend('PATH', list(extra_paths))
+        return env