compilers: perform targeted imports for detect

Only import the ones we need for the language we are detecting, once we
actually detect that language.

This will allow finally dropping the main imports of these files in a
followup commit.

2 files changed, 3 insertions, 3 deletions

diff --git a/mesonbuild/dependencies/dev.py b/mesonbuild/dependencies/dev.py
index bf9ba2b..e3774c1 100644
--- a/mesonbuild/dependencies/dev.py
+++ b/mesonbuild/dependencies/dev.py
@@ -27,8 +27,6 @@ import typing as T
 from mesonbuild.interpreterbase.decorators import FeatureDeprecated
 
 from .. import mesonlib, mlog
-from ..compilers.c import AppleClangCCompiler
-from ..compilers.cpp import AppleClangCPPCompiler
 from ..compilers.detect import detect_compiler_for
 from ..environment import get_llvm_tool_names
 from ..mesonlib import version_compare, stringlistify, extract_as_list
@@ -486,6 +484,8 @@ class ZlibSystemDependency(SystemDependency):
 
     def __init__(self, name: str, environment: 'Environment', kwargs: T.Dict[str, T.Any]):
         super().__init__(name, environment, kwargs)
+        from ..compilers.c import AppleClangCCompiler
+        from ..compilers.cpp import AppleClangCPPCompiler
 
         m = self.env.machines[self.for_machine]
 
diff --git a/mesonbuild/dependencies/dub.py b/mesonbuild/dependencies/dub.py
index cad4aad..8821e2c 100644
--- a/mesonbuild/dependencies/dub.py
+++ b/mesonbuild/dependencies/dub.py
@@ -17,7 +17,6 @@ from .pkgconfig import PkgConfigDependency
 from ..mesonlib import (Popen_safe, OptionKey)
 from ..mesonlib.universal import join_args
 from ..programs import ExternalProgram
-from ..compilers.d import DCompiler, d_feature_args
 from .. import mlog
 import re
 import os
@@ -33,6 +32,7 @@ class DubDependency(ExternalDependency):
     def __init__(self, name: str, environment: 'Environment', kwargs: T.Dict[str, T.Any]):
         super().__init__(DependencyTypeName('dub'), environment, kwargs, language='d')
         self.name = name
+        from ..compilers.d import DCompiler, d_feature_args
 
         _temp_comp = super().get_compiler()
         assert isinstance(_temp_comp, DCompiler)